Add pre-test stage reset to ensure known environment state

- Add reset_stage_pre job that runs after deploy_stage but before integration tests
- Extract reset script into reusable .reset_stage_template
- Ensures stage environment is in known state even if manually modified
- Pipeline flow: deploy_stage → reset_stage_pre → integration_test_stage → reset_stage

.gitignore

@@ -37,6 +37,10 @@ Thumbs.db
 # Build
 /build/
 /dist/
+frontend/dist/
+
+# Node
+node_modules/
 
 # Local config overrides
 config.local.yaml
@@ -61,3 +65,4 @@ temp/
 .claude/
 CLAUDE.md
 AGENTS.md
+PROSPER-NOTES.md

.gitlab-ci.yml

@@ -6,44 +6,542 @@ include:
 variables:
 # renovate: datasource=gitlab-tags depName=esv/bsf/pypi/prosper versioning=semver registryUrl=https://gitlab.global.bsf.tools
   PROSPER_VERSION: v0.64.1
+  # Use internal PyPI proxy instead of public internet
+  PIP_INDEX_URL: https://deps.global.bsf.tools/artifactory/api/pypi/pypi.org/simple
+  # Environment URLs (used by deploy and test jobs)
+  STAGE_URL: https://orchard-stage.common.global.bsf.tools
+  PROD_URL: https://orchard.common.global.bsf.tools
+  # Stage environment AWS resources (used by reset job)
+  STAGE_RDS_HOST: orchard-stage.cluster-cvw3jzjkozoc.us-gov-west-1.rds.amazonaws.com
+  STAGE_RDS_DBNAME: postgres
+  STAGE_SECRET_ARN: "arn:aws-us-gov:secretsmanager:us-gov-west-1:052673043337:secret:rds!cluster-a573672b-1a38-4665-a654-1b7df37b5297-IaeFQL"
+  STAGE_S3_BUCKET: orchard-artifacts-stage
+  AWS_REGION: us-gov-west-1
+  # Shared pip cache directory
+  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.pip-cache"
 
-kics:
-  allow_failure: true
+# Prevent duplicate pipelines for MRs
+workflow:
+  rules:
+    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
+      when: never
+    - when: always
+
+# Define stages - extends Prosper's stages with our custom ones
+stages:
+  - .pre
+  - lint
+  - build
+  - test
+  - analyze
+  - deploy
+
+# Override Prosper template jobs to exclude tag pipelines
+# Tags only run deploy_prod and smoke_test_prod (image already built on main)
+build_image:
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
+    - when: on_success
+
+test_image:
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
+    - when: on_success
 
 hadolint:
-  allow_failure: true
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
+    - when: on_success
 
+kics:
+  variables:
+    KICS_CONFIG: kics.config
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
+    - when: on_success
 
-# Run Python tests
-python_tests:
-  stage: test
+secrets:
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
+    - when: on_success
+
+app_deps_scan:
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
+    - when: on_success
+
+cve_scan:
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
+    - when: on_success
+
+app_sbom_analysis:
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
+    - when: on_success
+
+cve_sbom_analysis:
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
+    - when: on_success
+
+# Override release job to wait for stage integration tests before creating tag
+# This ensures the tag (which triggers prod deploy) is only created after stage passes
+release:
+  needs: [integration_test_stage, changelog]
+
+# Full integration test suite template (for feature/stage deployments)
+# Runs the complete pytest integration test suite against the deployed environment
+.integration_test_template: &integration_test_template
+  stage: deploy  # Runs in deploy stage, but after deployment due to 'needs'
   image: deps.global.bsf.tools/docker/python:3.12-slim
+  timeout: 20m  # Full suite takes longer than smoke tests
+  interruptible: true  # Cancel if new pipeline starts
+  retry: 1  # Retry once on failure (network flakiness)
+  cache:
+    key: pip-$CI_COMMIT_REF_SLUG
+    paths:
+      - .pip-cache/
+    policy: pull-push
   before_script:
-    - pip install -r backend/requirements.txt
-    - pip install pytest pytest-asyncio httpx
+    - pip install --index-url "$PIP_INDEX_URL" -r backend/requirements.txt
+    - pip install --index-url "$PIP_INDEX_URL" pytest pytest-asyncio httpx
   script:
     - cd backend
-    - python -m pytest -v || echo "No tests yet"
+    # Run full integration test suite, excluding:
+    # - large/slow tests
+    # - requires_direct_s3 tests (can't access MinIO from outside K8s cluster)
+    # ORCHARD_TEST_URL tells the tests which server to connect to
+    # Note: Auth tests work because dev/stage deployments have relaxed rate limits
+    - |
+      python -m pytest tests/integration/ -v \
+        --junitxml=integration-report.xml \
+        -m "not large and not slow and not requires_direct_s3" \
+        --tb=short
+  artifacts:
+    when: always
+    expire_in: 1 week
+    paths:
+      - backend/integration-report.xml
+    reports:
+      junit: backend/integration-report.xml
 
-# deploy_helm_charts:
-#   stage: deploy
-#   image:
-#     name: deps.global.bsf.tools/registry-1.docker.io/alpine/k8s:1.29.12
-#   parallel:
-#     matrix:
-#       # - ENV: "prod"
-#       #   VALUES_FILE: "helm/values-prod.yaml"
-#       #   CONTEXT: "esv/bsf/bsf-services/gitlab-kaas-agent-config:services-prod-agent"
-#       #   NAMESPACE: "bsf-services-namespace"
-#         # ONLY: "main"
-#       - ENV: "dev"
-#         VALUES_FILE: "helm/orchard/values.yaml"
-#         CONTEXT: "esv/bsf/bsf-services/gitlab-kaas-agent-config:services-prod-agent"
-#         NAMESPACE: "bsf-services-dev-namespace"
-#         # ONLY: ["branches", "!main"]
-#   script:
-#     - kubectl config use-context $CONTEXT
-#     - echo "Deploy - buildah push ${IMAGE_NAME}:latest"
-#     - |
-#       helm upgrade --install orchard-dev ./helm/orchard --namespace $NAMESPACE -f $VALUES_FILE
+# Lightweight smoke test template (for production - no test data creation)
+.smoke_test_template: &smoke_test_template
+  stage: deploy
+  image: deps.global.bsf.tools/docker/python:3.12-slim
+  timeout: 5m
+  before_script:
+    - pip install --index-url "$PIP_INDEX_URL" httpx
+  script:
+    - |
+      python - <<'PYTEST_SCRIPT'
+      import httpx
+      import os
+      import sys
 
+      BASE_URL = os.environ.get("ORCHARD_TEST_URL")
+      if not BASE_URL:
+          print("ERROR: ORCHARD_TEST_URL not set")
+          sys.exit(1)
+
+      print(f"Running smoke tests against {BASE_URL}")
+      client = httpx.Client(base_url=BASE_URL, timeout=30.0)
+
+      errors = []
+
+      # Test 1: Health endpoint
+      print("\n=== Test 1: Health endpoint ===")
+      r = client.get("/health")
+      if r.status_code == 200:
+          print("PASS: Health check passed")
+      else:
+          errors.append(f"Health check failed: {r.status_code}")
+
+      # Test 2: API responds (list projects)
+      print("\n=== Test 2: API responds ===")
+      r = client.get("/api/v1/projects")
+      if r.status_code == 200:
+          projects = r.json()
+          print(f"PASS: API responding, found {len(projects)} project(s)")
+      else:
+          errors.append(f"API check failed: {r.status_code}")
+
+      # Test 3: Frontend served
+      print("\n=== Test 3: Frontend served ===")
+      r = client.get("/")
+      if r.status_code == 200 and "</html>" in r.text:
+          print("PASS: Frontend is being served")
+      else:
+          errors.append(f"Frontend check failed: {r.status_code}")
+
+      # Report results
+      print("\n" + "=" * 50)
+      if errors:
+          print(f"FAILED: {len(errors)} error(s)")
+          for e in errors:
+              print(f"  FAIL: {e}")
+          sys.exit(1)
+      else:
+          print("SUCCESS: All smoke tests passed!")
+          sys.exit(0)
+      PYTEST_SCRIPT
+
+# Integration tests for stage deployment (full suite)
+# Reset stage template - shared by pre and post test reset jobs
+# Calls the /api/v1/admin/factory-reset endpoint which handles DB and S3 cleanup
+.reset_stage_template: &reset_stage_template
+  stage: deploy
+  image: deps.global.bsf.tools/docker/python:3.12-slim
+  timeout: 5m
+  retry: 1  # Retry once on transient failures
+  before_script:
+    - pip install --index-url "$PIP_INDEX_URL" httpx
+  script:
+    - |
+      python - <<'RESET_SCRIPT'
+      import httpx
+      import sys
+      import os
+      import time
+
+      BASE_URL = os.environ.get("STAGE_URL", "")
+      ADMIN_USER = "admin"
+      ADMIN_PASS = "changeme123"  # Default admin password
+      MAX_RETRIES = 3
+      RETRY_DELAY = 5  # seconds
+
+      if not BASE_URL:
+          print("ERROR: STAGE_URL environment variable not set")
+          sys.exit(1)
+
+      print(f"=== Resetting stage environment at {BASE_URL} ===")
+
+      def do_reset():
+          with httpx.Client(base_url=BASE_URL, timeout=120.0) as client:
+              # Login as admin
+              print("Logging in as admin...")
+              login_response = client.post(
+                  "/api/v1/auth/login",
+                  json={"username": ADMIN_USER, "password": ADMIN_PASS},
+              )
+              if login_response.status_code != 200:
+                  raise Exception(f"Login failed: {login_response.status_code} - {login_response.text}")
+              print("Login successful")
+
+              # Call factory reset endpoint
+              print("Calling factory reset endpoint...")
+              reset_response = client.post(
+                  "/api/v1/admin/factory-reset",
+                  headers={"X-Confirm-Reset": "yes-delete-all-data"},
+              )
+
+              if reset_response.status_code == 200:
+                  result = reset_response.json()
+                  print("Factory reset successful!")
+                  print(f"  Database tables dropped: {result['results']['database_tables_dropped']}")
+                  print(f"  S3 objects deleted: {result['results']['s3_objects_deleted']}")
+                  print(f"  Database reinitialized: {result['results']['database_reinitialized']}")
+                  print(f"  Seeded: {result['results']['seeded']}")
+                  return True
+              else:
+                  raise Exception(f"Factory reset failed: {reset_response.status_code} - {reset_response.text}")
+
+      # Retry loop
+      for attempt in range(1, MAX_RETRIES + 1):
+          try:
+              print(f"Attempt {attempt}/{MAX_RETRIES}")
+              if do_reset():
+                  sys.exit(0)
+          except Exception as e:
+              print(f"Attempt {attempt} failed: {e}")
+              if attempt < MAX_RETRIES:
+                  print(f"Retrying in {RETRY_DELAY} seconds...")
+                  time.sleep(RETRY_DELAY)
+              else:
+                  print("All retry attempts failed")
+                  sys.exit(1)
+      RESET_SCRIPT
+  rules:
+    - if: '$CI_COMMIT_BRANCH == "main"'
+      when: on_success
+
+# Reset stage BEFORE integration tests (ensure known state)
+reset_stage_pre:
+  <<: *reset_stage_template
+  needs: [deploy_stage]
+
+# Integration tests for stage deployment (full suite)
+integration_test_stage:
+  <<: *integration_test_template
+  needs: [reset_stage_pre]
+  variables:
+    ORCHARD_TEST_URL: $STAGE_URL
+  rules:
+    - if: '$CI_COMMIT_BRANCH == "main"'
+      when: on_success
+
+# Reset stage AFTER integration tests (clean slate for next run)
+reset_stage:
+  <<: *reset_stage_template
+  needs: [integration_test_stage]
+  allow_failure: true  # Don't fail pipeline if reset has issues
+
+# Integration tests for feature deployment (full suite)
+integration_test_feature:
+  <<: *integration_test_template
+  needs: [deploy_feature]
+  variables:
+    ORCHARD_TEST_URL: https://orchard-$CI_COMMIT_REF_SLUG.common.global.bsf.tools
+  rules:
+    - if: '$CI_COMMIT_BRANCH && $CI_COMMIT_BRANCH != "main"'
+      when: on_success
+
+# Run Python backend unit tests
+python_unit_tests:
+  stage: test
+  needs: []  # Run in parallel with build
+  image: deps.global.bsf.tools/docker/python:3.12-slim
+  timeout: 15m
+  interruptible: true  # Cancel if new pipeline starts
+  cache:
+    key: pip-$CI_COMMIT_REF_SLUG
+    paths:
+      - .pip-cache/
+    policy: pull-push
+  before_script:
+    - pip install --index-url "$PIP_INDEX_URL" -r backend/requirements.txt
+    - pip install --index-url "$PIP_INDEX_URL" pytest pytest-asyncio pytest-cov httpx
+  script:
+    - cd backend
+    # Run unit tests (integration tests run post-deployment against live environment)
+    - python -m pytest tests/unit/ -v --cov=app --cov-report=term --cov-report=xml:coverage.xml --cov-report=html:coverage_html --junitxml=pytest-report.xml
+  artifacts:
+    when: always
+    expire_in: 1 week
+    paths:
+      - backend/coverage.xml
+      - backend/coverage_html/
+      - backend/pytest-report.xml
+    reports:
+      junit: backend/pytest-report.xml
+      coverage_report:
+        coverage_format: cobertura
+        path: backend/coverage.xml
+  coverage: '/TOTAL.*\s+(\d+%)/'
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
+    - when: on_success
+
+# Run frontend tests
+frontend_tests:
+  stage: test
+  needs: []  # Run in parallel with build
+  image: deps.global.bsf.tools/docker/node:20-alpine
+  timeout: 15m
+  interruptible: true  # Cancel if new pipeline starts
+  cache:
+    key: npm-$CI_COMMIT_REF_SLUG
+    paths:
+      - frontend/node_modules/
+    policy: pull-push
+  before_script:
+    - cd frontend
+    - npm config set registry https://deps.global.bsf.tools/artifactory/api/npm/registry.npmjs.org
+    - npm ci --verbose
+  script:
+    - npm run test -- --run --reporter=verbose --coverage
+  artifacts:
+    when: always
+    expire_in: 1 week
+    paths:
+      - frontend/coverage/
+    reports:
+      coverage_report:
+        coverage_format: cobertura
+        path: frontend/coverage/cobertura-coverage.xml
+  coverage: '/All files[^|]*\|[^|]*\s+([\d\.]+)/'
+  rules:
+    - if: '$CI_COMMIT_TAG'
+      when: never
+    - when: on_success
+
+# Shared deploy configuration
+.deploy_template: &deploy_template
+  stage: deploy
+  needs: [build_image, test_image, kics, hadolint, python_unit_tests, frontend_tests, secrets, app_deps_scan, cve_scan, cve_sbom_analysis, app_sbom_analysis]
+  image: deps.global.bsf.tools/registry-1.docker.io/alpine/k8s:1.29.12
+
+.helm_setup: &helm_setup
+  - helm version
+  - cd helm/orchard
+  # OCI-based charts from internal registry - no repo add needed
+  - helm dependency update
+
+# Simplified deployment verification - just health check
+# Full API/frontend checks are done by integration tests post-deployment
+.verify_deployment: &verify_deployment |
+  echo "=== Waiting for health endpoint (certs may take a few minutes) ==="
+  for i in $(seq 1 30); do
+    if curl -sf --max-time 10 "$BASE_URL/health" > /dev/null 2>&1; then
+      echo "Health check passed!"
+      echo "Deployment URL: $BASE_URL"
+      exit 0
+    fi
+    echo "Attempt $i/30 - waiting 10s..."
+    sleep 10
+  done
+  echo "Health check failed after 30 attempts"
+  exit 1
+
+# Deploy to stage (main branch)
+deploy_stage:
+  <<: *deploy_template
+  variables:
+    NAMESPACE: orch-stage-namespace
+    VALUES_FILE: helm/orchard/values-stage.yaml
+    BASE_URL: $STAGE_URL
+  before_script:
+    - kubectl config use-context esv/bsf/bsf-integration/orchard/orchard-mvp:orchard-stage
+    - *helm_setup
+  script:
+    - echo "Deploying to stage environment"
+    - cd $CI_PROJECT_DIR
+    - |
+      helm upgrade --install orchard-stage ./helm/orchard \
+        --namespace $NAMESPACE \
+        -f $VALUES_FILE \
+        --set image.tag=git.linux-amd64-$CI_COMMIT_SHA \
+        --wait \
+        --atomic \
+        --timeout 10m
+    - kubectl rollout status deployment/orchard-stage-server -n $NAMESPACE --timeout=10m
+    - *verify_deployment
+  environment:
+    name: stage
+    url: $STAGE_URL
+    kubernetes:
+      agent: esv/bsf/bsf-integration/orchard/orchard-mvp:orchard-stage
+  rules:
+    - if: '$CI_COMMIT_BRANCH == "main"'
+      when: on_success
+
+# Deploy feature branch to dev namespace
+deploy_feature:
+  <<: *deploy_template
+  variables:
+    NAMESPACE: orch-dev-namespace
+    VALUES_FILE: helm/orchard/values-dev.yaml
+  before_script:
+    - kubectl config use-context esv/bsf/bsf-integration/orchard/orchard-mvp:orchard
+    - *helm_setup
+  script:
+    - echo "Deploying feature branch $CI_COMMIT_REF_SLUG"
+    - cd $CI_PROJECT_DIR
+    - |
+      helm upgrade --install orchard-$CI_COMMIT_REF_SLUG ./helm/orchard \
+        --namespace $NAMESPACE \
+        -f $VALUES_FILE \
+        --set image.tag=git.linux-amd64-$CI_COMMIT_SHA \
+        --set ingress.hosts[0].host=orchard-$CI_COMMIT_REF_SLUG.common.global.bsf.tools \
+        --set ingress.tls[0].hosts[0]=orchard-$CI_COMMIT_REF_SLUG.common.global.bsf.tools \
+        --set ingress.tls[0].secretName=orchard-$CI_COMMIT_REF_SLUG-tls \
+        --set minioIngress.host=minio-$CI_COMMIT_REF_SLUG.common.global.bsf.tools \
+        --set minioIngress.tls.secretName=minio-$CI_COMMIT_REF_SLUG-tls \
+        --wait \
+        --atomic \
+        --timeout 10m
+    - kubectl rollout status deployment/orchard-$CI_COMMIT_REF_SLUG-server -n $NAMESPACE --timeout=10m
+    - export BASE_URL="https://orchard-$CI_COMMIT_REF_SLUG.common.global.bsf.tools"
+    - *verify_deployment
+  environment:
+    name: review/$CI_COMMIT_REF_SLUG
+    url: https://orchard-$CI_COMMIT_REF_SLUG.common.global.bsf.tools
+    on_stop: cleanup_feature
+    auto_stop_in: 1 week
+    kubernetes:
+      agent: esv/bsf/bsf-integration/orchard/orchard-mvp:orchard
+  rules:
+    - if: '$CI_COMMIT_BRANCH && $CI_COMMIT_BRANCH != "main"'
+      when: on_success
+
+# Cleanup feature branch deployment (standalone - doesn't need deploy dependencies)
+cleanup_feature:
+  stage: deploy
+  needs: []
+  image: deps.global.bsf.tools/registry-1.docker.io/alpine/k8s:1.29.12
+  timeout: 5m
+  variables:
+    NAMESPACE: orch-dev-namespace
+    GIT_STRATEGY: none  # No source needed, branch may be deleted
+  before_script:
+    - kubectl config use-context esv/bsf/bsf-integration/orchard/orchard-mvp:orchard
+  script:
+    - echo "Cleaning up feature deployment orchard-$CI_COMMIT_REF_SLUG"
+    - helm uninstall orchard-$CI_COMMIT_REF_SLUG --namespace $NAMESPACE || true
+  environment:
+    name: review/$CI_COMMIT_REF_SLUG
+    action: stop
+    kubernetes:
+      agent: esv/bsf/bsf-integration/orchard/orchard-mvp:orchard
+  rules:
+    - if: '$CI_COMMIT_BRANCH && $CI_COMMIT_BRANCH != "main"'
+      when: manual
+  allow_failure: true
+
+# Deploy to production (version tags only)
+deploy_prod:
+  stage: deploy
+  # For tag pipelines, no other jobs run - image was already built when commit was on main
+  needs: []
+  image: deps.global.bsf.tools/registry-1.docker.io/alpine/k8s:1.29.12
+  variables:
+    NAMESPACE: orch-namespace
+    VALUES_FILE: helm/orchard/values-prod.yaml
+    BASE_URL: $PROD_URL
+  before_script:
+    - kubectl config use-context esv/bsf/bsf-integration/orchard/orchard-mvp:orchard-prod
+    - *helm_setup
+  script:
+    - echo "Deploying to PRODUCTION - version $CI_COMMIT_TAG"
+    - cd $CI_PROJECT_DIR
+    - |
+      helm upgrade --install orchard-prod ./helm/orchard \
+        --namespace $NAMESPACE \
+        -f $VALUES_FILE \
+        --set image.tag=git.linux-amd64-$CI_COMMIT_SHA \
+        --wait \
+        --atomic \
+        --timeout 10m
+    - kubectl rollout status deployment/orchard-prod-server -n $NAMESPACE --timeout=10m
+    - *verify_deployment
+  environment:
+    name: production
+    url: $PROD_URL
+    kubernetes:
+      agent: esv/bsf/bsf-integration/orchard/orchard-mvp:orchard-prod
+  rules:
+    # Only run on semantic version tags (v1.0.0, v1.2.3, etc.)
+    - if: '$CI_COMMIT_TAG =~ /^v\d+\.\d+\.\d+$/'
+      when: on_success
+  allow_failure: false
+
+# Smoke tests for production deployment (read-only, no test data creation)
+smoke_test_prod:
+  <<: *smoke_test_template
+  needs: [deploy_prod]
+  variables:
+    ORCHARD_TEST_URL: $PROD_URL
+  rules:
+    - if: '$CI_COMMIT_TAG =~ /^v\d+\.\d+\.\d+$/'
+      when: on_success

.gitlab/agents/orchard-stage/config.yaml

@@ -0,0 +1,4 @@
+# GitLab Agent configuration for stage deployments
+ci_access:
+  projects:
+    - id: esv/bsf/bsf-integration/orchard/orchard-mvp

.gitlab/agents/orchard/config.yaml

@@ -0,0 +1,4 @@
+# GitLab Agent configuration for dev/feature deployments
+ci_access:
+  projects:
+    - id: esv/bsf/bsf-integration/orchard/orchard-mvp

.gitlab/orchard/config.yaml

@@ -0,0 +1,3 @@
+ci_access:
+  projects:
+    - id: esv/bsf/bsf-integration/orchard/orchard-mvp

.gitleaks.toml

@@ -0,0 +1,8 @@
+# Gitleaks configuration
+# https://github.com/gitleaks/gitleaks#configuration
+
+[allowlist]
+# Test files that contain variable names matching secret patterns (e.g., s3_key)
+paths = [
+  '''backend/tests/.*\.py''',
+]

.gitleaksignore

@@ -0,0 +1,19 @@
+# Gitleaks ignore file
+# https://github.com/gitleaks/gitleaks#gitleaksignore
+#
+# False positive: s3_key is an attribute name in test assertions, not a secret
+# These are historical commits - files have since been deleted or updated with inline comments
+7e68baed0886a3c928644cd01aa3b39f92d4f976:backend/tests/test_duplicate_detection.py:generic-api-key:154
+81458b3bcb5ace97109ba4c16f4afa6e55b1b8bd:backend/tests/test_duplicate_detection.py:generic-api-key:154
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CHANGELOG.md

@@ -6,7 +6,274 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Changed
+- Added pre-test stage reset to ensure known environment state before integration tests (#54)
+
+## [0.5.1] - 2026-01-23
+### Changed
+- Simplified tag pipeline to only run deploy and smoke tests (image already built on main) (#54)
+
+### Fixed
+- Fixed production CI deployment namespace to use correct `orch-namespace` (#54)
+- Added gitleaks config to allowlist test files from secret scanning (#54)
+
+## [0.5.0] - 2026-01-23
 ### Added
+- Added factory reset endpoint `POST /api/v1/admin/factory-reset` for test environment cleanup (#54)
+  - Requires admin authentication and `X-Confirm-Reset: yes-delete-all-data` header
+  - Drops all database tables, clears S3 bucket, reinitializes schema, re-seeds default data
+  - CI pipeline automatically calls this after integration tests on stage
+- Added `delete_all()` method to storage backend for bulk S3 object deletion (#54)
+- Added AWS Secrets Manager CSI driver support for database credentials (#54)
+- Added SecretProviderClass template for Secrets Manager integration (#54)
+- Added IRSA service account annotations for prod and stage environments (#54)
+- Added comprehensive upload/download tests for size boundaries (1B to 1GB) (#38)
+- Added concurrent upload/download tests (2, 5, 10 parallel operations) (#38)
+- Added data integrity tests (binary, text, unicode, compressed content) (#38)
+- Added chunk boundary tests for edge cases (#38)
+- Added `@pytest.mark.large` and `@pytest.mark.concurrent` test markers (#38)
+- Added `generate_content()` and `generate_content_with_hash()` test helpers (#38)
+- Added `sized_content` fixture for generating test content of specific sizes (#38)
+- Added upload API tests: upload without tag, artifact creation verification, S3 object creation (#38)
+- Added download API tests: tag: prefix resolution, 404 for nonexistent project/package/artifact (#38)
+- Added download header tests: Content-Type, Content-Length, Content-Disposition, ETag, X-Checksum-SHA256 (#38)
+- Added error handling tests: timeout behavior, checksum validation, resource cleanup, graceful error responses (#38)
+- Added version API tests: version creation, auto-detection, listing, download by version prefix (#38)
+- Added integrity verification tests: round-trip hash verification, client-side verification workflow, size variants (1KB-10MB) (#40)
+- Added consistency check endpoint tests with response format validation (#40)
+- Added corruption detection tests: bit flip, truncation, appended content, size mismatch, missing S3 objects (#40)
+- Added Digest header tests (RFC 3230) and verification mode tests (#40)
+- Added integrity verification documentation (`docs/integrity-verification.md`) (#40)
+- Added conditional request support for downloads (If-None-Match, If-Modified-Since) returning 304 Not Modified (#42)
+- Added caching headers to downloads: Cache-Control (immutable), Last-Modified (#42)
+- Added 416 Range Not Satisfiable response for invalid range requests (#42)
+- Added download completion logging with bytes transferred and throughput (#42)
+- Added client disconnect handling during streaming downloads (#42)
+- Added streaming download tests: range requests, conditional requests, caching headers, download resume (#42)
+- Added upload duration and throughput metrics (`duration_ms`, `throughput_mbps`) to upload response (#43)
+- Added upload progress logging for large files (hash computation and multipart upload phases) (#43)
+- Added client disconnect handling during uploads with proper cleanup (#43)
+- Added upload progress tracking endpoint `GET /upload/{upload_id}/progress` for resumable uploads (#43)
+- Added large file upload tests (10MB, 100MB, 1GB) with multipart upload verification (#43)
+- Added upload cancellation and timeout handling tests (#43)
+- Added comprehensive API documentation for upload endpoints with curl, Python, and JavaScript examples (#43)
+- Added `package_versions` table for immutable version tracking separate from mutable tags (#56)
+  - Versions are set at upload time via explicit `version` parameter or auto-detected from filename/metadata
+  - Version detection priority: explicit parameter > package metadata > filename pattern
+  - Versions are immutable once created (unlike tags which can be moved)
+- Added version API endpoints (#56):
+  - `GET /api/v1/project/{project}/{package}/versions` - List all versions for a package
+  - `GET /api/v1/project/{project}/{package}/versions/{version}` - Get specific version details
+  - `DELETE /api/v1/project/{project}/{package}/versions/{version}` - Delete a version (admin only)
+- Added version support to upload endpoint via `version` form parameter (#56)
+- Added `version:X.Y.Z` prefix for explicit version resolution in download refs (#56)
+- Added version field to tag responses (shows which version the artifact has, if any) (#56)
+- Added migration `007_package_versions.sql` with ref_count triggers and data migration from semver tags (#56)
+- Added production deployment job triggered by semantic version tags (v1.0.0) with manual approval gate (#63)
+- Added production Helm values file with persistence enabled (20Gi PostgreSQL, 100Gi MinIO) (#63)
+- Added integration tests for production deployment (#63)
+- Added GitLab CI pipeline for feature branch deployments to dev namespace (#51)
+- Added `deploy_feature` job with dynamic hostnames and unique release names (#51)
+- Added `cleanup_feature` job with `on_stop` for automatic cleanup on merge (#51)
+- Added `values-dev.yaml` Helm values for lightweight ephemeral environments (#51)
+- Added main branch deployment to stage environment (#51)
+- Added post-deployment integration tests (#51)
+- Added internal proxy configuration for npm, pip, helm, and apt (#51)
+
+### Changed
+- Configured stage and prod to use AWS RDS instead of PostgreSQL subchart (#54)
+- Configured stage and prod to use AWS S3 instead of MinIO subchart (#54)
+- Changed prod deployment from manual to automatic on version tags (#54)
+- Updated S3 client to support IRSA credentials when no explicit keys provided (#54)
+- Changed prod image pullPolicy to Always (#54)
+- Added proxy-body-size annotation to prod ingress for large uploads (#54)
+- CI integration tests now run full pytest suite (~350 tests) against deployed environment instead of 3 smoke tests
+- CI production deployment uses lightweight smoke tests only (no test data creation in prod)
+- CI pipeline improvements: shared pip cache, `interruptible` flag on test jobs, retry on integration tests
+- Simplified deploy verification to health check only (full checks done by integration tests)
+- Extracted environment URLs to global variables for maintainability
+- Made `cleanup_feature` job standalone (no longer inherits deploy template dependencies)
+- Renamed `integration_test_prod` to `smoke_test_prod` for clarity
+- Updated download ref resolution to check versions before tags (version → tag → artifact ID) (#56)
+- Deploy jobs now require all security scans to pass before deployment (added test_image, app_deps_scan, cve_scan, cve_sbom_analysis, app_sbom_analysis to dependencies) (#63)
+- Increased deploy job timeout from 5m to 10m (#63)
+- Added `--atomic` flag to Helm deployments for automatic rollback on failure
+- Adjusted dark mode color palette to use lighter background tones for better readability and reduced eye strain (#52)
+- Replaced project card grid with sortable data table on Home page for better handling of large project lists
+- Replaced package card grid with sortable data table on Project page for consistency
+- Replaced SortDropdown with table header sorting on Package page for consistency
+- Enabled sorting on supported table columns (name, created, updated) via clickable headers
+- Updated browser tab title to "Orchard" with custom favicon
+- Improved pod naming: Orchard pods now named `orchard-{env}-server-*` for clarity (#51)
+
+### Fixed
+- Fixed factory reset not creating default admin user after reset (#60)
+- Admin user was only created at server startup, not after factory reset
+- CI reset job would fail to login because admin user didn't exist
+- Improved reset_stage CI job reliability (#60)
+- Added application-level retry logic (3 attempts with 5s delay)
+- Added job-level retry for transient failures
+- Fixed httpx client to use proper context manager
+- Increased timeout to 120s for reset operations
+- Fixed CI integration test rate limiting: added configurable `ORCHARD_LOGIN_RATE_LIMIT` env var, relaxed to 1000/minute for dev/stage
+- Fixed duplicate `TestSecurityEdgeCases` class definition in test_auth_api.py
+- Fixed integration tests auth: session-scoped client, configurable credentials via env vars, fail-fast on auth errors
+- Fixed 413 Request Entity Too Large errors on uploads by adding `proxy-body-size: "0"` nginx annotation to Orchard ingress
+- Fixed CI tests that require direct S3 access: added `@pytest.mark.requires_direct_s3` marker and excluded from CI
+- Fixed ref_count triggers not being created: added auto-migration for tags ref_count trigger functions
+- Fixed Content-Disposition header encoding for non-ASCII filenames using RFC 5987 (#38)
+- Fixed deploy jobs running even when tests or security scans fail (changed rules from `when: always` to `when: on_success`) (#63)
+- Fixed python_tests job not using internal PyPI proxy (#63)
+- Fixed `cleanup_feature` job failing when branch is deleted (`GIT_STRATEGY: none`) (#51)
+- Fixed gitleaks false positives with fingerprints for historical commits (#51)
+- Fixed integration tests running when deploy fails (`when: on_success`) (#51)
+- Fixed static file serving for favicon and other files in frontend dist root
+- Fixed deploy jobs running when secrets scan fails (added `secrets` to deploy dependencies)
+- Fixed dev environment memory requests to equal limits per cluster Kyverno policy
+- Fixed init containers missing resource limits (Kyverno policy compliance)
+- Fixed Python SyntaxWarning for invalid escape sequence in database migration regex pattern
+
+### Removed
+- Removed unused `store_streaming()` method from storage.py (#51)
+- Disabled PostgreSQL subchart for stage and prod environments (#54)
+- Disabled MinIO subchart for stage and prod environments (#54)
+
+## [0.4.0] - 2026-01-12
+### Added
+- Added user authentication system with session-based login (#50)
+  - `users` table with password hashing (bcrypt), admin flag, active status
+  - `sessions` table for web login sessions (24-hour expiry)
+  - `auth_settings` table for future OIDC configuration
+  - Default admin user created on first boot (username: admin, password: admin)
+- Added auth API endpoints (#50)
+  - `POST /api/v1/auth/login` - Login with username/password
+  - `POST /api/v1/auth/logout` - Logout and clear session
+  - `GET /api/v1/auth/me` - Get current user info
+  - `POST /api/v1/auth/change-password` - Change own password
+- Added API key management with user ownership (#50)
+  - `POST /api/v1/auth/keys` - Create API key (format: `orch_<random>`)
+  - `GET /api/v1/auth/keys` - List user's API keys
+  - `DELETE /api/v1/auth/keys/{id}` - Revoke API key
+  - Added `owner_id`, `scopes`, `description` columns to `api_keys` table
+- Added admin user management endpoints (#50)
+  - `GET /api/v1/admin/users` - List all users
+  - `POST /api/v1/admin/users` - Create user
+  - `GET /api/v1/admin/users/{username}` - Get user details
+  - `PUT /api/v1/admin/users/{username}` - Update user (admin/active status)
+  - `POST /api/v1/admin/users/{username}/reset-password` - Reset password
+- Added `auth.py` module with AuthService class and FastAPI dependencies (#50)
+- Added auth schemas: LoginRequest, LoginResponse, UserResponse, APIKeyResponse (#50)
+- Added migration `006_auth_tables.sql` for auth database tables (#50)
+- Added frontend Login page with session management (#50)
+- Added frontend API Keys management page (#50)
+- Added frontend Admin Users page (admin-only) (#50)
+- Added AuthContext for frontend session state (#50)
+- Added user menu to Layout header with login/logout (#50)
+- Added 15 integration tests for auth system (#50)
+- Added reusable `DragDropUpload` component for artifact uploads (#8)
+  - Drag-and-drop file selection with visual feedback
+  - Click-to-browse fallback
+  - Multiple file upload support with queue management
+  - Real-time progress indicators with speed and ETA
+  - File type and size validation (configurable)
+  - Concurrent upload handling (configurable max concurrent)
+  - Automatic retry with exponential backoff for network errors
+  - Individual file status (pending, uploading, complete, failed)
+  - Retry and remove actions per file
+  - Auto-dismiss success messages after 5 seconds
+- Integrated DragDropUpload into PackagePage replacing basic file input (#8)
+- Added frontend testing infrastructure with Vitest and React Testing Library (#14)
+  - Configured Vitest for React/TypeScript with jsdom
+  - Added 24 unit tests for DragDropUpload component
+  - Tests cover: rendering, drag-drop events, file validation, upload queue, progress, errors
+- Added chunked upload support for large files (#9)
+  - Files >100MB automatically use chunked upload API (10MB chunks)
+  - Client-side SHA256 hash computation via Web Crypto API
+  - localStorage persistence for resume after browser close
+  - Deduplication check at upload init phase
+- Added offline detection and network resilience (#12)
+  - Automatic pause when browser goes offline
+  - Auto-resume when connection restored
+  - Offline banner UI with status message
+  - XHR abort on network loss to prevent hung requests
+- Added download by artifact ID feature (#10)
+  - Direct artifact ID input field on package page
+  - Hex-only input validation with character count
+  - File size and filename displayed in tag list
+- Added backend security tests (#15)
+  - Path traversal prevention tests for upload/download
+  - Malformed request handling tests
+  - Checksum validation tests
+  - 10 new security-focused integration tests
+- Added download verification with `verify` and `verify_mode` query parameters (#26)
+  - `?verify=true&verify_mode=pre` - Pre-verification: verify before streaming (guaranteed no corrupt data)
+  - `?verify=true&verify_mode=stream` - Streaming verification: verify while streaming (logs error if mismatch)
+- Added checksum response headers to all download endpoints (#27)
+  - `X-Checksum-SHA256` - SHA256 hash of the artifact
+  - `X-Content-Length` - File size in bytes
+  - `X-Checksum-MD5` - MD5 hash (if available)
+  - `ETag` - Artifact ID (SHA256)
+  - `Digest` - RFC 3230 format sha-256 hash (base64)
+  - `X-Verified` - Verification status (true/false/pending)
+- Added `checksum.py` module with SHA256 utilities (#26)
+  - `compute_sha256()` and `compute_sha256_stream()` functions
+  - `HashingStreamWrapper` for incremental hash computation
+  - `VerifyingStreamWrapper` for stream verification
+  - `verify_checksum()` and `verify_checksum_strict()` functions
+  - `ChecksumMismatchError` exception with context
+- Added `get_verified()` and `get_stream_verified()` methods to storage layer (#26)
+- Added `logging_config.py` module with structured logging (#28)
+  - JSON logging format for production
+  - Request ID tracking via context variables
+  - Verification failure logging with full context
+- Added `log_level` and `log_format` settings to configuration (#28)
+- Added 62 unit tests for checksum utilities and verification (#29)
+- Added 17 integration tests for download verification API (#29)
+- Added global artifacts endpoint `GET /api/v1/artifacts` with project/package/tag/size/date filters (#18)
+- Added global tags endpoint `GET /api/v1/tags` with project/package/search/date filters (#18)
+- Added wildcard pattern matching (`*`) for tag filters across all endpoints (#18)
+- Added comma-separated multi-value support for tag filters (#18)
+- Added `search` parameter to `/api/v1/uploads` for filename search (#18)
+- Added `tag` filter to `/api/v1/uploads` endpoint (#18)
+- Added `sort` and `order` parameters to `/api/v1/uploads` endpoint (#18)
+- Added `min_size` and `max_size` filters to package artifacts endpoint (#18)
+- Added `sort` and `order` parameters to package artifacts endpoint (#18)
+- Added `from` and `to` date filters to package tags endpoint (#18)
+- Added `GlobalArtifactResponse` and `GlobalTagResponse` schemas (#18)
+- Added S3 object verification before database commit during upload (#19)
+- Added S3 object cleanup on database commit failure (#19)
+- Added upload duration tracking (`duration_ms` field) (#19)
+- Added `User-Agent` header capture during uploads (#19)
+- Added `X-Checksum-SHA256` header support for client-side checksum verification (#19)
+- Added `status`, `error_message`, `client_checksum` columns to uploads table (#19)
+- Added `upload_locks` table for future concurrent upload conflict detection (#19)
+- Added consistency check endpoint `GET /api/v1/admin/consistency-check` (#19)
+- Added `PUT /api/v1/projects/{project}` endpoint for project updates with audit logging (#20)
+- Added `PUT /api/v1/project/{project}/packages/{package}` endpoint for package updates with audit logging (#20)
+- Added `artifact.download` audit logging to download endpoint (#20)
+- Added `ProjectHistory` and `PackageHistory` models with database triggers (#20)
+- Added migration `004_history_tables.sql` for project/package history (#20)
+- Added migration `005_upload_enhancements.sql` for upload status tracking (#19)
+- Added 9 integration tests for global artifacts/tags endpoints (#18)
+- Added global uploads query endpoint `GET /api/v1/uploads` with project/package/user/date filters (#18)
+- Added project-level uploads endpoint `GET /api/v1/project/{project}/uploads` (#18)
+- Added `has_more` field to pagination metadata for easier pagination UI (#18)
+- Added `upload_id`, `content_type`, `original_name`, `created_at` fields to upload response (#19)
+- Added audit log API endpoints with filtering and pagination (#20)
+  - `GET /api/v1/audit-logs` - list all audit logs with action/resource/user/date filters
+  - `GET /api/v1/projects/{project}/audit-logs` - project-scoped audit logs
+  - `GET /api/v1/project/{project}/{package}/audit-logs` - package-scoped audit logs
+- Added upload history API endpoints (#20)
+  - `GET /api/v1/project/{project}/{package}/uploads` - list upload events for a package
+  - `GET /api/v1/artifact/{id}/uploads` - list all uploads of a specific artifact
+- Added artifact provenance endpoint `GET /api/v1/artifact/{id}/history` (#20)
+  - Returns full artifact history including packages, tags, and upload events
+- Added audit logging for project.create, package.create, tag.create, tag.update, artifact.upload actions (#20)
+- Added `AuditLogResponse`, `UploadHistoryResponse`, `ArtifactProvenanceResponse` schemas (#20)
+- Added `TagHistoryDetailResponse` schema with artifact metadata (#20)
+- Added 31 integration tests for audit log, history, and upload query endpoints (#22)
+### Changed
+- Standardized audit action naming to `{entity}.{action}` pattern (project.delete, package.delete, tag.delete) (#20)
 - Added `StorageBackend` protocol/interface for backend-agnostic storage (#33)
 - Added `health_check()` method to storage backend with `/health` endpoint integration (#33)
 - Added `verify_integrity()` method for post-upload hash validation (#33)
@@ -32,10 +299,19 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added integration tests for upload scenarios and ref_count management (#35)
 - Added integration tests for S3 verification and failure cleanup (#35)
 - Added integration tests for all stats endpoints (#35)
+- Added integration tests for cascade deletion ref_count behavior (package/project delete) (#35)
+- Added integration tests for tag update ref_count adjustments (#35)
+- Added integration tests for garbage collection endpoints (#35)
+- Added integration tests for file size validation (#35)
 - Added test dependencies to requirements.txt (pytest, pytest-asyncio, pytest-cov, httpx, moto) (#35)
+- Added `ORCHARD_MAX_FILE_SIZE` config option (default: 10GB) for upload size limits (#37)
+- Added `ORCHARD_MIN_FILE_SIZE` config option (default: 1 byte, rejects empty files) (#37)
+- Added file size validation to upload and resumable upload endpoints (#37)
+- Added comprehensive deduplication design document (`docs/design/deduplication-design.md`) (#37)
 ### Fixed
 - Fixed Helm chart `minio.ingress` conflicting with Bitnami MinIO subchart by renaming to `minioIngress` (#48)
 - Fixed JSON report serialization error for Decimal types in `GET /api/v1/stats/report` (#34)
+- Fixed resumable upload double-counting ref_count when tag provided (removed manual increment, SQL triggers handle it) (#35)
 
 ## [0.3.0] - 2025-12-15
 ### Changed

Dockerfile

@@ -1,7 +1,7 @@
 # Frontend build stage
 FROM containers.global.bsf.tools/node:20-alpine AS frontend-builder
 
-ARG NPM_REGISTRY=https://deps.global.bsf.tools/artifactory/api/npm/registry.npmjs.org/
+ARG NPM_REGISTRY=https://deps.global.bsf.tools/artifactory/api/npm/registry.npmjs.org
 
 WORKDIR /app/frontend
 
@@ -21,10 +21,18 @@ RUN npm run build
 # Runtime stage
 FROM containers.global.bsf.tools/python:3.12-slim
 
+ARG PIP_INDEX_URL=https://deps.global.bsf.tools/artifactory/api/pypi/pypi.org/simple
+
+# Configure apt to use internal Debian mirrors only (trixie = Debian testing)
+RUN printf 'deb https://deps.global.bsf.tools/artifactory/deb.debian.org-debian trixie main\n\
+deb https://deps.global.bsf.tools/artifactory/security.debian.org-debian-security trixie-security main\n' > /etc/apt/sources.list \
+    && rm -rf /etc/apt/sources.list.d/* /var/lib/apt/lists/*
+
 # Disable proxy cache
-RUN echo 'Acquire::http::Pipeline-Depth 0;\nAcquire::http::No-Cache true;\nAcquire::BrokenProxy true;\n' > /etc/apt/apt.conf.d/99fixbadproxy
+RUN printf 'Acquire::http::Pipeline-Depth 0;\nAcquire::http::No-Cache true;\nAcquire::BrokenProxy true;\n' > /etc/apt/apt.conf.d/99fixbadproxy
 
 # Install system dependencies
+# hadolint ignore=DL3008
 RUN apt-get update && apt-get install -y --no-install-recommends \
     curl \
     && rm -rf /var/lib/apt/lists/*
@@ -37,7 +45,7 @@ WORKDIR /app
 
 # Copy requirements and install Python dependencies
 COPY backend/requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+RUN pip install --no-cache-dir --index-url "$PIP_INDEX_URL" -r requirements.txt
 
 # Copy backend source
 COPY backend/ ./backend/

README.md

@@ -22,6 +22,7 @@ Orchard is a centralized binary artifact storage system that provides content-ad
   - **Package** - Named collection within a project
   - **Artifact** - Specific content instance identified by SHA256
 - **Tags** - Alias system for referencing artifacts by human-readable names (e.g., `v1.0.0`, `latest`, `stable`)
+- **Versions** - Immutable version records set at upload time (explicit or auto-detected from filename/metadata), separate from mutable tags
 - **Package Formats & Platforms** - Packages can be tagged with format (npm, pypi, docker, deb, rpm, etc.) and platform (linux, darwin, windows, etc.)
 - **Rich Package Metadata** - Package listings include aggregated stats (tag count, artifact count, total size, latest tag)
 - **S3-Compatible Backend** - Uses MinIO (or any S3-compatible storage) for artifact storage
@@ -46,6 +47,12 @@ Orchard is a centralized binary artifact storage system that provides content-ad
   - `.whl` - Python wheels (name, version, author)
   - `.jar` - Java JARs (manifest info, Maven coordinates)
   - `.zip` - ZIP files (file count, uncompressed size)
+- **Authentication** - Multiple authentication methods:
+  - Session-based login with username/password
+  - API keys for programmatic access (`orch_` prefixed tokens)
+  - OIDC integration for SSO
+  - Admin user management
+- **Garbage Collection** - Clean up orphaned artifacts (ref_count=0) via admin API
 
 ### API Endpoints
 
@@ -67,6 +74,9 @@ Orchard is a centralized binary artifact storage system that provides content-ad
 | `POST` | `/api/v1/project/:project/:package/tags` | Create a tag |
 | `GET` | `/api/v1/project/:project/:package/tags/:tag_name` | Get single tag with artifact metadata |
 | `GET` | `/api/v1/project/:project/:package/tags/:tag_name/history` | Get tag change history |
+| `GET` | `/api/v1/project/:project/:package/versions` | List all versions for a package |
+| `GET` | `/api/v1/project/:project/:package/versions/:version` | Get specific version details |
+| `DELETE` | `/api/v1/project/:project/:package/versions/:version` | Delete a version (admin only) |
 | `GET` | `/api/v1/project/:project/:package/artifacts` | List artifacts in package (with filtering) |
 | `GET` | `/api/v1/project/:project/:package/consumers` | List consumers of a package |
 | `GET` | `/api/v1/artifact/:id` | Get artifact metadata with referencing tags |
@@ -87,12 +97,14 @@ For large files, use the resumable upload API:
 
 When downloading artifacts, the `:ref` parameter supports multiple formats:
 
-- `latest` - Tag name directly
-- `v1.0.0` - Version tag
+- `latest` - Implicit lookup (checks version first, then tag, then artifact ID)
+- `v1.0.0` - Implicit lookup (version takes precedence over tag with same name)
+- `version:1.0.0` - Explicit version reference
 - `tag:stable` - Explicit tag reference
-- `version:2024.1` - Version reference
 - `artifact:a3f5d8e12b4c6789...` - Direct SHA256 hash reference
 
+**Resolution order for implicit refs:** version → tag → artifact ID
+
 ## Quick Start
 
 ### Prerequisites
@@ -224,9 +236,16 @@ curl "http://localhost:8080/api/v1/project/my-project/packages/releases?include_
 ### Upload an Artifact
 
 ```bash
+# Upload with tag only (version auto-detected from filename)
 curl -X POST http://localhost:8080/api/v1/project/my-project/releases/upload \
   -F "file=@./build/app-v1.0.0.tar.gz" \
-  -F "tag=v1.0.0"
+  -F "tag=latest"
+
+# Upload with explicit version and tag
+curl -X POST http://localhost:8080/api/v1/project/my-project/releases/upload \
+  -F "file=@./build/app-v1.0.0.tar.gz" \
+  -F "tag=latest" \
+  -F "version=1.0.0"
 ```
 
 Response:
@@ -236,7 +255,9 @@ Response:
   "size": 1048576,
   "project": "my-project",
   "package": "releases",
-  "tag": "v1.0.0",
+  "tag": "latest",
+  "version": "1.0.0",
+  "version_source": "explicit",
   "format_metadata": {
     "format": "tarball",
     "package_name": "app",
@@ -394,6 +415,38 @@ curl http://localhost:8080/api/v1/project/my-project/releases/tags/latest/histor
 
 Returns list of artifact changes for the tag (most recent first).
 
+### List Versions
+
+```bash
+# Basic listing
+curl http://localhost:8080/api/v1/project/my-project/releases/versions
+
+# With pagination and sorting
+curl "http://localhost:8080/api/v1/project/my-project/releases/versions?sort=version&order=desc"
+```
+
+Response includes tags pointing to each version's artifact:
+```json
+{
+  "items": [
+    {
+      "id": "uuid",
+      "package_id": "uuid",
+      "version": "1.0.0",
+      "version_source": "explicit",
+      "artifact_id": "a3f5d8e...",
+      "size": 1048576,
+      "content_type": "application/gzip",
+      "original_name": "app-v1.0.0.tar.gz",
+      "created_at": "2025-01-01T00:00:00Z",
+      "created_by": "user",
+      "tags": ["latest", "stable"]
+    }
+  ],
+  "pagination": {"page": 1, "limit": 20, "total": 1, "total_pages": 1}
+}
+```
+
 ### List Artifacts in Package
 
 ```bash
@@ -522,15 +575,48 @@ Configuration is provided via environment variables prefixed with `ORCHARD_`:
 | `ORCHARD_DOWNLOAD_MODE` | Download mode: `presigned`, `redirect`, or `proxy` | `presigned` |
 | `ORCHARD_PRESIGNED_URL_EXPIRY` | Presigned URL expiry in seconds | `3600` |
 
+## CI/CD Pipeline
+
+The GitLab CI/CD pipeline automates building, testing, and deploying Orchard.
+
+### Pipeline Stages
+
+| Stage | Jobs | Description |
+|-------|------|-------------|
+| lint | `kics`, `hadolint`, `secrets` | Security and code quality scanning |
+| build | `build_image` | Build and push Docker image |
+| test | `python_tests`, `frontend_tests` | Run unit tests with coverage |
+| deploy | `deploy_stage`, `deploy_feature` | Deploy to Kubernetes |
+| deploy | `integration_test_*` | Post-deployment integration tests |
+
+### Environments
+
+| Environment | Branch | Namespace | URL |
+|-------------|--------|-----------|-----|
+| Stage | `main` | `orch-stage-namespace` | `orchard-stage.common.global.bsf.tools` |
+| Feature | `*` (non-main) | `orch-dev-namespace` | `orchard-{branch}.common.global.bsf.tools` |
+
+### Feature Branch Workflow
+
+1. Push a feature branch
+2. Pipeline builds, tests, and deploys to isolated environment
+3. Integration tests run against the deployed environment
+4. GitLab UI shows environment link for manual testing
+5. On merge to main, environment is automatically cleaned up
+6. Environments also auto-expire after 1 week if branch is not deleted
+
+### Manual Cleanup
+
+Feature environments can be manually cleaned up via:
+- GitLab UI: Environments → Stop environment
+- CLI: `helm uninstall orchard-{branch} -n orch-dev-namespace`
+
 ## Kubernetes Deployment
 
 ### Using Helm
 
 ```bash
-# Add Bitnami repo for dependencies
-helm repo add bitnami https://charts.bitnami.com/bitnami
-
-# Update dependencies
+# Update dependencies (uses internal OCI registry)
 cd helm/orchard
 helm dependency update
 
@@ -575,7 +661,8 @@ See `helm/orchard/values.yaml` for all configuration options.
 - **projects** - Top-level organizational containers
 - **packages** - Collections within projects
 - **artifacts** - Content-addressable artifacts (SHA256)
-- **tags** - Aliases pointing to artifacts
+- **tags** - Mutable aliases pointing to artifacts
+- **package_versions** - Immutable version records (set at upload time)
 - **tag_history** - Audit trail for tag changes
 - **uploads** - Upload event records
 - **consumers** - Dependency tracking
@@ -593,10 +680,16 @@ The following features are planned but not yet implemented:
 - [ ] Export/Import for air-gapped systems
 - [ ] Consumer notification
 - [ ] Automated update propagation
-- [ ] OIDC/SAML authentication
-- [ ] API key management
+- [ ] SAML authentication
 - [ ] Redis caching layer
-- [ ] Garbage collection for orphaned artifacts
+- [ ] Download integrity verification (see `docs/design/integrity-verification.md`)
+
+### Recently Implemented
+
+- [x] OIDC authentication
+- [x] API key management
+- [x] Garbage collection for orphaned artifacts
+- [x] User authentication with sessions
 
 ## License
 

backend/app/checksum.py

@@ -0,0 +1,477 @@
+"""
+Checksum utilities for download verification.
+
+This module provides functions and classes for computing and verifying
+SHA256 checksums during artifact downloads.
+
+Key components:
+- compute_sha256(): Compute SHA256 of bytes content
+- compute_sha256_stream(): Compute SHA256 from an iterable stream
+- HashingStreamWrapper: Wrapper that computes hash while streaming
+- VerifyingStreamWrapper: Wrapper that verifies hash after streaming
+- verify_checksum(): Verify content against expected hash
+- ChecksumMismatchError: Exception for verification failures
+"""
+
+import hashlib
+import logging
+import re
+import base64
+from typing import (
+    Generator,
+    Optional,
+    Any,
+    Callable,
+)
+
+logger = logging.getLogger(__name__)
+
+# Default chunk size for streaming operations (8KB)
+DEFAULT_CHUNK_SIZE = 8 * 1024
+
+# Regex pattern for valid SHA256 hash (64 hex characters)
+SHA256_PATTERN = re.compile(r"^[a-fA-F0-9]{64}$")
+
+
+class ChecksumError(Exception):
+    """Base exception for checksum operations."""
+
+    pass
+
+
+class ChecksumMismatchError(ChecksumError):
+    """
+    Raised when computed checksum does not match expected checksum.
+
+    Attributes:
+        expected: The expected SHA256 hash
+        actual: The actual computed SHA256 hash
+        artifact_id: Optional artifact ID for context
+        s3_key: Optional S3 key for debugging
+        size: Optional file size
+    """
+
+    def __init__(
+        self,
+        expected: str,
+        actual: str,
+        artifact_id: Optional[str] = None,
+        s3_key: Optional[str] = None,
+        size: Optional[int] = None,
+        message: Optional[str] = None,
+    ):
+        self.expected = expected
+        self.actual = actual
+        self.artifact_id = artifact_id
+        self.s3_key = s3_key
+        self.size = size
+
+        if message:
+            self.message = message
+        else:
+            self.message = (
+                f"Checksum verification failed: "
+                f"expected {expected[:16]}..., got {actual[:16]}..."
+            )
+        super().__init__(self.message)
+
+    def to_dict(self) -> dict:
+        """Convert to dictionary for logging/API responses."""
+        return {
+            "error": "checksum_mismatch",
+            "expected": self.expected,
+            "actual": self.actual,
+            "artifact_id": self.artifact_id,
+            "s3_key": self.s3_key,
+            "size": self.size,
+            "message": self.message,
+        }
+
+
+class InvalidHashFormatError(ChecksumError):
+    """Raised when a hash string is not valid SHA256 format."""
+
+    def __init__(self, hash_value: str):
+        self.hash_value = hash_value
+        message = f"Invalid SHA256 hash format: '{hash_value[:32]}...'"
+        super().__init__(message)
+
+
+def is_valid_sha256(hash_value: str) -> bool:
+    """
+    Check if a string is a valid SHA256 hash (64 hex characters).
+
+    Args:
+        hash_value: String to validate
+
+    Returns:
+        True if valid SHA256 format, False otherwise
+    """
+    if not hash_value:
+        return False
+    return bool(SHA256_PATTERN.match(hash_value))
+
+
+def compute_sha256(content: bytes) -> str:
+    """
+    Compute SHA256 hash of bytes content.
+
+    Args:
+        content: Bytes content to hash
+
+    Returns:
+        Lowercase hexadecimal SHA256 hash (64 characters)
+
+    Raises:
+        ChecksumError: If hash computation fails
+    """
+    if content is None:
+        raise ChecksumError("Cannot compute hash of None content")
+
+    try:
+        return hashlib.sha256(content).hexdigest().lower()
+    except Exception as e:
+        raise ChecksumError(f"Hash computation failed: {e}") from e
+
+
+def compute_sha256_stream(
+    stream: Any,
+    chunk_size: int = DEFAULT_CHUNK_SIZE,
+) -> str:
+    """
+    Compute SHA256 hash from a stream or file-like object.
+
+    Reads the stream in chunks to minimize memory usage for large files.
+
+    Args:
+        stream: Iterator yielding bytes or file-like object with read()
+        chunk_size: Size of chunks to read (default 8KB)
+
+    Returns:
+        Lowercase hexadecimal SHA256 hash (64 characters)
+
+    Raises:
+        ChecksumError: If hash computation fails
+    """
+    try:
+        hasher = hashlib.sha256()
+
+        # Handle file-like objects with read()
+        if hasattr(stream, "read"):
+            while True:
+                chunk = stream.read(chunk_size)
+                if not chunk:
+                    break
+                hasher.update(chunk)
+        else:
+            # Handle iterators
+            for chunk in stream:
+                if chunk:
+                    hasher.update(chunk)
+
+        return hasher.hexdigest().lower()
+    except Exception as e:
+        raise ChecksumError(f"Stream hash computation failed: {e}") from e
+
+
+def verify_checksum(content: bytes, expected: str) -> bool:
+    """
+    Verify that content matches expected SHA256 hash.
+
+    Args:
+        content: Bytes content to verify
+        expected: Expected SHA256 hash (case-insensitive)
+
+    Returns:
+        True if hash matches, False otherwise
+
+    Raises:
+        InvalidHashFormatError: If expected hash is not valid format
+        ChecksumError: If hash computation fails
+    """
+    if not is_valid_sha256(expected):
+        raise InvalidHashFormatError(expected)
+
+    actual = compute_sha256(content)
+    return actual == expected.lower()
+
+
+def verify_checksum_strict(
+    content: bytes,
+    expected: str,
+    artifact_id: Optional[str] = None,
+    s3_key: Optional[str] = None,
+) -> None:
+    """
+    Verify content matches expected hash, raising exception on mismatch.
+
+    Args:
+        content: Bytes content to verify
+        expected: Expected SHA256 hash (case-insensitive)
+        artifact_id: Optional artifact ID for error context
+        s3_key: Optional S3 key for error context
+
+    Raises:
+        InvalidHashFormatError: If expected hash is not valid format
+        ChecksumMismatchError: If verification fails
+        ChecksumError: If hash computation fails
+    """
+    if not is_valid_sha256(expected):
+        raise InvalidHashFormatError(expected)
+
+    actual = compute_sha256(content)
+    if actual != expected.lower():
+        raise ChecksumMismatchError(
+            expected=expected.lower(),
+            actual=actual,
+            artifact_id=artifact_id,
+            s3_key=s3_key,
+            size=len(content),
+        )
+
+
+def sha256_to_base64(hex_hash: str) -> str:
+    """
+    Convert SHA256 hex string to base64 encoding (for RFC 3230 Digest header).
+
+    Args:
+        hex_hash: SHA256 hash as 64-character hex string
+
+    Returns:
+        Base64-encoded hash string
+    """
+    if not is_valid_sha256(hex_hash):
+        raise InvalidHashFormatError(hex_hash)
+
+    hash_bytes = bytes.fromhex(hex_hash)
+    return base64.b64encode(hash_bytes).decode("ascii")
+
+
+class HashingStreamWrapper:
+    """
+    Wrapper that computes SHA256 hash incrementally as chunks are read.
+
+    This allows computing the hash while streaming content to a client,
+    without buffering the entire content in memory.
+
+    Usage:
+        wrapper = HashingStreamWrapper(stream)
+        for chunk in wrapper:
+            send_to_client(chunk)
+        final_hash = wrapper.get_hash()
+
+    Attributes:
+        chunk_size: Size of chunks to yield
+        bytes_read: Total bytes processed so far
+    """
+
+    def __init__(
+        self,
+        stream: Any,
+        chunk_size: int = DEFAULT_CHUNK_SIZE,
+    ):
+        """
+        Initialize the hashing stream wrapper.
+
+        Args:
+            stream: Source stream (iterator, file-like, or S3 StreamingBody)
+            chunk_size: Size of chunks to yield (default 8KB)
+        """
+        self._stream = stream
+        self._hasher = hashlib.sha256()
+        self._chunk_size = chunk_size
+        self._bytes_read = 0
+        self._finalized = False
+        self._final_hash: Optional[str] = None
+
+    @property
+    def bytes_read(self) -> int:
+        """Total bytes read so far."""
+        return self._bytes_read
+
+    @property
+    def chunk_size(self) -> int:
+        """Chunk size for reading."""
+        return self._chunk_size
+
+    def __iter__(self) -> Generator[bytes, None, None]:
+        """Iterate over chunks, computing hash as we go."""
+        # Handle S3 StreamingBody (has iter_chunks)
+        if hasattr(self._stream, "iter_chunks"):
+            for chunk in self._stream.iter_chunks(chunk_size=self._chunk_size):
+                if chunk:
+                    self._hasher.update(chunk)
+                    self._bytes_read += len(chunk)
+                    yield chunk
+        # Handle file-like objects with read()
+        elif hasattr(self._stream, "read"):
+            while True:
+                chunk = self._stream.read(self._chunk_size)
+                if not chunk:
+                    break
+                self._hasher.update(chunk)
+                self._bytes_read += len(chunk)
+                yield chunk
+        # Handle iterators
+        else:
+            for chunk in self._stream:
+                if chunk:
+                    self._hasher.update(chunk)
+                    self._bytes_read += len(chunk)
+                    yield chunk
+
+        self._finalized = True
+        self._final_hash = self._hasher.hexdigest().lower()
+
+    def get_hash(self) -> str:
+        """
+        Get the computed SHA256 hash.
+
+        If stream hasn't been fully consumed, consumes remaining chunks.
+
+        Returns:
+            Lowercase hexadecimal SHA256 hash
+        """
+        if not self._finalized:
+            # Consume remaining stream
+            for _ in self:
+                pass
+
+        return self._final_hash or self._hasher.hexdigest().lower()
+
+    def get_hash_if_complete(self) -> Optional[str]:
+        """
+        Get hash only if stream has been fully consumed.
+
+        Returns:
+            Hash if complete, None otherwise
+        """
+        if self._finalized:
+            return self._final_hash
+        return None
+
+
+class VerifyingStreamWrapper:
+    """
+    Wrapper that yields chunks and verifies hash after streaming completes.
+
+    IMPORTANT: Because HTTP streams cannot be "un-sent", if verification
+    fails after streaming, the client has already received potentially
+    corrupt data. This wrapper logs an error but cannot prevent delivery.
+
+    For guaranteed verification before delivery, use pre-verification mode
+    which buffers the entire content first.
+
+    Usage:
+        wrapper = VerifyingStreamWrapper(stream, expected_hash)
+        for chunk in wrapper:
+            send_to_client(chunk)
+        wrapper.verify()  # Raises ChecksumMismatchError if failed
+    """
+
+    def __init__(
+        self,
+        stream: Any,
+        expected_hash: str,
+        artifact_id: Optional[str] = None,
+        s3_key: Optional[str] = None,
+        chunk_size: int = DEFAULT_CHUNK_SIZE,
+        on_failure: Optional[Callable[[Any], None]] = None,
+    ):
+        """
+        Initialize the verifying stream wrapper.
+
+        Args:
+            stream: Source stream
+            expected_hash: Expected SHA256 hash to verify against
+            artifact_id: Optional artifact ID for error context
+            s3_key: Optional S3 key for error context
+            chunk_size: Size of chunks to yield
+            on_failure: Optional callback called on verification failure
+        """
+        if not is_valid_sha256(expected_hash):
+            raise InvalidHashFormatError(expected_hash)
+
+        self._hashing_wrapper = HashingStreamWrapper(stream, chunk_size)
+        self._expected_hash = expected_hash.lower()
+        self._artifact_id = artifact_id
+        self._s3_key = s3_key
+        self._on_failure = on_failure
+        self._verified: Optional[bool] = None
+
+    @property
+    def bytes_read(self) -> int:
+        """Total bytes read so far."""
+        return self._hashing_wrapper.bytes_read
+
+    @property
+    def is_verified(self) -> Optional[bool]:
+        """
+        Verification status.
+
+        Returns:
+            True if verified successfully, False if failed, None if not yet complete
+        """
+        return self._verified
+
+    def __iter__(self) -> Generator[bytes, None, None]:
+        """Iterate over chunks."""
+        yield from self._hashing_wrapper
+
+    def verify(self) -> bool:
+        """
+        Verify the hash after stream is complete.
+
+        Must be called after fully consuming the iterator.
+
+        Returns:
+            True if verification passed
+
+        Raises:
+            ChecksumMismatchError: If verification failed
+        """
+        actual_hash = self._hashing_wrapper.get_hash()
+
+        if actual_hash == self._expected_hash:
+            self._verified = True
+            logger.debug(
+                f"Verification passed for {self._artifact_id or 'unknown'}: {actual_hash[:16]}..."
+            )
+            return True
+
+        self._verified = False
+        error = ChecksumMismatchError(
+            expected=self._expected_hash,
+            actual=actual_hash,
+            artifact_id=self._artifact_id,
+            s3_key=self._s3_key,
+            size=self._hashing_wrapper.bytes_read,
+        )
+
+        # Log the failure
+        logger.error(f"Checksum verification FAILED after streaming: {error.to_dict()}")
+
+        # Call failure callback if provided
+        if self._on_failure:
+            try:
+                self._on_failure(error)
+            except Exception as e:
+                logger.warning(f"Verification failure callback raised exception: {e}")
+
+        raise error
+
+    def verify_silent(self) -> bool:
+        """
+        Verify the hash without raising exception.
+
+        Returns:
+            True if verification passed, False otherwise
+        """
+        try:
+            return self.verify()
+        except ChecksumMismatchError:
+            return False
+
+    def get_actual_hash(self) -> Optional[str]:
+        """Get the actual computed hash (only available after iteration)."""
+        return self._hashing_wrapper.get_hash_if_complete()

backend/app/config.py

@@ -25,6 +25,7 @@ class Settings(BaseSettings):
     database_pool_recycle: int = (
         1800  # Recycle connections after this many seconds (30 min)
     )
+    database_query_timeout: int = 30  # Query timeout in seconds (0 = no timeout)
 
     # S3
     s3_endpoint: str = ""
@@ -38,12 +39,31 @@ class Settings(BaseSettings):
     s3_read_timeout: int = 60  # Read timeout in seconds
     s3_max_retries: int = 3  # Max retry attempts for transient failures
 
+    # Upload settings
+    max_file_size: int = 10 * 1024 * 1024 * 1024  # 10GB default max file size
+    min_file_size: int = 1  # Minimum 1 byte (empty files rejected)
+
     # Download settings
     download_mode: str = "presigned"  # "presigned", "redirect", or "proxy"
     presigned_url_expiry: int = (
         3600  # Presigned URL expiry in seconds (default: 1 hour)
     )
 
+    # Logging settings
+    log_level: str = "INFO"  # DEBUG, INFO, WARNING, ERROR, CRITICAL
+    log_format: str = "auto"  # "json", "standard", or "auto" (json in production)
+
+    # JWT Authentication settings (optional, for external identity providers)
+    jwt_enabled: bool = False  # Enable JWT token validation
+    jwt_secret: str = ""  # Secret key for HS256, or leave empty for RS256 with JWKS
+    jwt_algorithm: str = "HS256"  # HS256 or RS256
+    jwt_issuer: str = ""  # Expected issuer (iss claim), leave empty to skip validation
+    jwt_audience: str = ""  # Expected audience (aud claim), leave empty to skip validation
+    jwt_jwks_url: str = ""  # JWKS URL for RS256 (e.g., https://auth.example.com/.well-known/jwks.json)
+    jwt_username_claim: str = (
+        "sub"  # JWT claim to use as username (sub, email, preferred_username, etc.)
+    )
+
     @property
     def database_url(self) -> str:
         sslmode = f"?sslmode={self.database_sslmode}" if self.database_sslmode else ""

backend/app/database.py

@@ -12,6 +12,12 @@ from .models import Base
 settings = get_settings()
 logger = logging.getLogger(__name__)
 
+# Build connect_args with query timeout if configured
+connect_args = {}
+if settings.database_query_timeout > 0:
+    # PostgreSQL statement_timeout is in milliseconds
+    connect_args["options"] = f"-c statement_timeout={settings.database_query_timeout * 1000}"
+
 # Create engine with connection pool configuration
 engine = create_engine(
     settings.database_url,
@@ -21,6 +27,7 @@ engine = create_engine(
     max_overflow=settings.database_max_overflow,
     pool_timeout=settings.database_pool_timeout,
     pool_recycle=settings.database_pool_recycle,
+    connect_args=connect_args,
 )
 
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
@@ -144,6 +151,140 @@ def _run_migrations():
             END IF;
         END $$;
         """,
+        # Add package_versions indexes and triggers (007_package_versions.sql)
+        """
+        DO $$
+        BEGIN
+            -- Create indexes for package_versions if table exists
+            IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'package_versions') THEN
+                -- Indexes for common queries
+                IF NOT EXISTS (SELECT 1 FROM pg_indexes WHERE indexname = 'idx_package_versions_package_id') THEN
+                    CREATE INDEX idx_package_versions_package_id ON package_versions(package_id);
+                END IF;
+                IF NOT EXISTS (SELECT 1 FROM pg_indexes WHERE indexname = 'idx_package_versions_artifact_id') THEN
+                    CREATE INDEX idx_package_versions_artifact_id ON package_versions(artifact_id);
+                END IF;
+                IF NOT EXISTS (SELECT 1 FROM pg_indexes WHERE indexname = 'idx_package_versions_package_version') THEN
+                    CREATE INDEX idx_package_versions_package_version ON package_versions(package_id, version);
+                END IF;
+            END IF;
+        END $$;
+        """,
+        # Create ref_count trigger functions for tags (ensures triggers exist even if initial migration wasn't run)
+        """
+        CREATE OR REPLACE FUNCTION increment_artifact_ref_count()
+        RETURNS TRIGGER AS $$
+        BEGIN
+            UPDATE artifacts SET ref_count = ref_count + 1 WHERE id = NEW.artifact_id;
+            RETURN NEW;
+        END;
+        $$ LANGUAGE plpgsql;
+        """,
+        """
+        CREATE OR REPLACE FUNCTION decrement_artifact_ref_count()
+        RETURNS TRIGGER AS $$
+        BEGIN
+            UPDATE artifacts SET ref_count = ref_count - 1 WHERE id = OLD.artifact_id;
+            RETURN OLD;
+        END;
+        $$ LANGUAGE plpgsql;
+        """,
+        """
+        CREATE OR REPLACE FUNCTION update_artifact_ref_count()
+        RETURNS TRIGGER AS $$
+        BEGIN
+            IF OLD.artifact_id != NEW.artifact_id THEN
+                UPDATE artifacts SET ref_count = ref_count - 1 WHERE id = OLD.artifact_id;
+                UPDATE artifacts SET ref_count = ref_count + 1 WHERE id = NEW.artifact_id;
+            END IF;
+            RETURN NEW;
+        END;
+        $$ LANGUAGE plpgsql;
+        """,
+        # Create triggers for tags ref_count management
+        """
+        DO $$
+        BEGIN
+            -- Drop and recreate triggers to ensure they're current
+            DROP TRIGGER IF EXISTS tags_ref_count_insert_trigger ON tags;
+            CREATE TRIGGER tags_ref_count_insert_trigger
+                AFTER INSERT ON tags
+                FOR EACH ROW
+                EXECUTE FUNCTION increment_artifact_ref_count();
+
+            DROP TRIGGER IF EXISTS tags_ref_count_delete_trigger ON tags;
+            CREATE TRIGGER tags_ref_count_delete_trigger
+                AFTER DELETE ON tags
+                FOR EACH ROW
+                EXECUTE FUNCTION decrement_artifact_ref_count();
+
+            DROP TRIGGER IF EXISTS tags_ref_count_update_trigger ON tags;
+            CREATE TRIGGER tags_ref_count_update_trigger
+                AFTER UPDATE ON tags
+                FOR EACH ROW
+                WHEN (OLD.artifact_id IS DISTINCT FROM NEW.artifact_id)
+                EXECUTE FUNCTION update_artifact_ref_count();
+        END $$;
+        """,
+        # Create ref_count trigger functions for package_versions
+        """
+        CREATE OR REPLACE FUNCTION increment_version_ref_count()
+        RETURNS TRIGGER AS $$
+        BEGIN
+            UPDATE artifacts SET ref_count = ref_count + 1 WHERE id = NEW.artifact_id;
+            RETURN NEW;
+        END;
+        $$ LANGUAGE plpgsql;
+        """,
+        """
+        CREATE OR REPLACE FUNCTION decrement_version_ref_count()
+        RETURNS TRIGGER AS $$
+        BEGIN
+            UPDATE artifacts SET ref_count = ref_count - 1 WHERE id = OLD.artifact_id;
+            RETURN OLD;
+        END;
+        $$ LANGUAGE plpgsql;
+        """,
+        # Create triggers for package_versions ref_count
+        """
+        DO $$
+        BEGIN
+            IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'package_versions') THEN
+                -- Drop and recreate triggers to ensure they're current
+                DROP TRIGGER IF EXISTS package_versions_ref_count_insert ON package_versions;
+                CREATE TRIGGER package_versions_ref_count_insert
+                    AFTER INSERT ON package_versions
+                    FOR EACH ROW
+                    EXECUTE FUNCTION increment_version_ref_count();
+
+                DROP TRIGGER IF EXISTS package_versions_ref_count_delete ON package_versions;
+                CREATE TRIGGER package_versions_ref_count_delete
+                    AFTER DELETE ON package_versions
+                    FOR EACH ROW
+                    EXECUTE FUNCTION decrement_version_ref_count();
+            END IF;
+        END $$;
+        """,
+        # Migrate existing semver tags to package_versions
+        r"""
+        DO $$
+        BEGIN
+            IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'package_versions') THEN
+                -- Migrate tags that look like versions (v1.0.0, 1.2.3, 2.0.0-beta, etc.)
+                INSERT INTO package_versions (package_id, artifact_id, version, version_source, created_by, created_at)
+                SELECT
+                    t.package_id,
+                    t.artifact_id,
+                    CASE WHEN t.name LIKE 'v%' THEN substring(t.name from 2) ELSE t.name END,
+                    'migrated_from_tag',
+                    t.created_by,
+                    t.created_at
+                FROM tags t
+                WHERE t.name ~ '^v?[0-9]+\.[0-9]+(\.[0-9]+)?([-.][a-zA-Z0-9]+)?$'
+                ON CONFLICT (package_id, version) DO NOTHING;
+            END IF;
+        END $$;
+        """,
     ]
 
     with engine.connect() as conn:

backend/app/logging_config.py

@@ -0,0 +1,254 @@
+"""
+Structured logging configuration for Orchard.
+
+This module provides:
+- Structured JSON logging for production environments
+- Request tracing via X-Request-ID header
+- Verification failure logging with context
+- Configurable log levels via environment
+
+Usage:
+    from app.logging_config import setup_logging, get_request_id
+
+    setup_logging()  # Call once at app startup
+    request_id = get_request_id()  # Get current request's ID
+"""
+
+import logging
+import json
+import sys
+import uuid
+from datetime import datetime, timezone
+from typing import Optional, Any, Dict
+from contextvars import ContextVar
+
+from .config import get_settings
+
+# Context variable for request ID (thread-safe)
+_request_id_var: ContextVar[Optional[str]] = ContextVar("request_id", default=None)
+
+
+def get_request_id() -> Optional[str]:
+    """Get the current request's ID from context."""
+    return _request_id_var.get()
+
+
+def set_request_id(request_id: Optional[str] = None) -> str:
+    """
+    Set the request ID for the current context.
+
+    If no ID provided, generates a new UUID.
+    Returns the request ID that was set.
+    """
+    if request_id is None:
+        request_id = str(uuid.uuid4())
+    _request_id_var.set(request_id)
+    return request_id
+
+
+def clear_request_id():
+    """Clear the request ID from context."""
+    _request_id_var.set(None)
+
+
+class JSONFormatter(logging.Formatter):
+    """
+    JSON log formatter for structured logging.
+
+    Output format:
+    {
+        "timestamp": "2025-01-01T00:00:00.000Z",
+        "level": "INFO",
+        "logger": "app.routes",
+        "message": "Request completed",
+        "request_id": "abc-123",
+        "extra": {...}
+    }
+    """
+
+    def format(self, record: logging.LogRecord) -> str:
+        log_entry: Dict[str, Any] = {
+            "timestamp": datetime.now(timezone.utc).isoformat(),
+            "level": record.levelname,
+            "logger": record.name,
+            "message": record.getMessage(),
+        }
+
+        # Add request ID if available
+        request_id = get_request_id()
+        if request_id:
+            log_entry["request_id"] = request_id
+
+        # Add exception info if present
+        if record.exc_info:
+            log_entry["exception"] = self.formatException(record.exc_info)
+
+        # Add extra fields from record
+        extra_fields: Dict[str, Any] = {}
+        for key, value in record.__dict__.items():
+            if key not in (
+                "name",
+                "msg",
+                "args",
+                "created",
+                "filename",
+                "funcName",
+                "levelname",
+                "levelno",
+                "lineno",
+                "module",
+                "msecs",
+                "pathname",
+                "process",
+                "processName",
+                "relativeCreated",
+                "stack_info",
+                "exc_info",
+                "exc_text",
+                "thread",
+                "threadName",
+                "message",
+                "asctime",
+            ):
+                try:
+                    json.dumps(value)  # Ensure serializable
+                    extra_fields[key] = value
+                except (TypeError, ValueError):
+                    extra_fields[key] = str(value)
+
+        if extra_fields:
+            log_entry["extra"] = extra_fields
+
+        return json.dumps(log_entry)
+
+
+class StandardFormatter(logging.Formatter):
+    """
+    Standard log formatter for development.
+
+    Output format:
+    [2025-01-01 00:00:00] INFO [app.routes] [req-abc123] Request completed
+    """
+
+    def format(self, record: logging.LogRecord) -> str:
+        timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+        request_id = get_request_id()
+        req_str = f" [req-{request_id[:8]}]" if request_id else ""
+
+        base_msg = f"[{timestamp}] {record.levelname:5} [{record.name}]{req_str} {record.getMessage()}"
+
+        if record.exc_info:
+            base_msg += "\n" + self.formatException(record.exc_info)
+
+        return base_msg
+
+
+def setup_logging(log_level: Optional[str] = None, json_format: Optional[bool] = None):
+    """
+    Configure logging for the application.
+
+    Args:
+        log_level: Log level (DEBUG, INFO, WARNING, ERROR, CRITICAL).
+                   Defaults to ORCHARD_LOG_LEVEL env var or INFO.
+        json_format: Use JSON format. Defaults to True in production.
+    """
+    settings = get_settings()
+
+    # Determine log level
+    if log_level is None:
+        log_level = getattr(settings, "log_level", "INFO")
+    effective_level = log_level if log_level else "INFO"
+    level = getattr(logging, effective_level.upper(), logging.INFO)
+
+    # Determine format
+    if json_format is None:
+        json_format = settings.is_production
+
+    # Create handler
+    handler = logging.StreamHandler(sys.stdout)
+    handler.setLevel(level)
+
+    # Set formatter
+    if json_format:
+        handler.setFormatter(JSONFormatter())
+    else:
+        handler.setFormatter(StandardFormatter())
+
+    # Configure root logger
+    root_logger = logging.getLogger()
+    root_logger.setLevel(level)
+
+    # Remove existing handlers
+    root_logger.handlers.clear()
+    root_logger.addHandler(handler)
+
+    # Configure specific loggers
+    for logger_name in ["app", "uvicorn", "uvicorn.access", "uvicorn.error"]:
+        logger = logging.getLogger(logger_name)
+        logger.setLevel(level)
+        logger.handlers.clear()
+        logger.addHandler(handler)
+        logger.propagate = False
+
+    # Quiet down noisy loggers
+    logging.getLogger("botocore").setLevel(logging.WARNING)
+    logging.getLogger("boto3").setLevel(logging.WARNING)
+    logging.getLogger("urllib3").setLevel(logging.WARNING)
+
+
+def log_verification_failure(
+    logger: logging.Logger,
+    expected_hash: str,
+    actual_hash: str,
+    artifact_id: Optional[str] = None,
+    s3_key: Optional[str] = None,
+    project: Optional[str] = None,
+    package: Optional[str] = None,
+    size: Optional[int] = None,
+    user_id: Optional[str] = None,
+    source_ip: Optional[str] = None,
+    verification_mode: Optional[str] = None,
+):
+    """
+    Log a verification failure with full context.
+
+    This creates a structured log entry with all relevant details
+    for debugging and alerting.
+    """
+    logger.error(
+        "Checksum verification failed",
+        extra={
+            "event": "verification_failure",
+            "expected_hash": expected_hash,
+            "actual_hash": actual_hash,
+            "artifact_id": artifact_id,
+            "s3_key": s3_key,
+            "project": project,
+            "package": package,
+            "size": size,
+            "user_id": user_id,
+            "source_ip": source_ip,
+            "verification_mode": verification_mode,
+            "hash_match": expected_hash == actual_hash,
+        },
+    )
+
+
+def log_verification_success(
+    logger: logging.Logger,
+    artifact_id: str,
+    size: Optional[int] = None,
+    verification_mode: Optional[str] = None,
+    duration_ms: Optional[float] = None,
+):
+    """Log a successful verification."""
+    logger.info(
+        f"Verification passed for artifact {artifact_id[:16]}...",
+        extra={
+            "event": "verification_success",
+            "artifact_id": artifact_id,
+            "size": size,
+            "verification_mode": verification_mode,
+            "duration_ms": duration_ms,
+        },
+    )

backend/app/main.py

@@ -1,14 +1,19 @@
-from fastapi import FastAPI
+from fastapi import FastAPI, Request
 from fastapi.staticfiles import StaticFiles
 from fastapi.responses import FileResponse
 from contextlib import asynccontextmanager
 import logging
 import os
 
+from slowapi import _rate_limit_exceeded_handler
+from slowapi.errors import RateLimitExceeded
+
 from .config import get_settings
 from .database import init_db, SessionLocal
 from .routes import router
 from .seed import seed_database
+from .auth import create_default_admin
+from .rate_limit import limiter
 
 settings = get_settings()
 logging.basicConfig(level=logging.INFO)
@@ -20,6 +25,18 @@ async def lifespan(app: FastAPI):
     # Startup: initialize database
     init_db()
 
+    # Create default admin user if no users exist
+    db = SessionLocal()
+    try:
+        admin = create_default_admin(db)
+        if admin:
+            logger.warning(
+                "Default admin user created with username 'admin' and password 'changeme123'. "
+                "CHANGE THIS PASSWORD IMMEDIATELY!"
+            )
+    finally:
+        db.close()
+
     # Seed test data in development mode
     if settings.is_development:
         logger.info(f"Running in {settings.env} mode - checking for seed data")
@@ -42,13 +59,21 @@ app = FastAPI(
     lifespan=lifespan,
 )
 
+# Set up rate limiting
+app.state.limiter = limiter
+app.add_exception_handler(RateLimitExceeded, _rate_limit_exceeded_handler)
+
 # Include API routes
 app.include_router(router)
 
 # Serve static files (React build) if the directory exists
 static_dir = os.path.join(os.path.dirname(__file__), "..", "..", "frontend", "dist")
 if os.path.exists(static_dir):
-    app.mount("/assets", StaticFiles(directory=os.path.join(static_dir, "assets")), name="assets")
+    app.mount(
+        "/assets",
+        StaticFiles(directory=os.path.join(static_dir, "assets")),
+        name="assets",
+    )
 
     @app.get("/")
     async def serve_spa():
@@ -60,12 +85,19 @@ if os.path.exists(static_dir):
         # Don't catch API routes or health endpoint
         if full_path.startswith("api/") or full_path.startswith("health"):
             from fastapi import HTTPException
+
             raise HTTPException(status_code=404, detail="Not found")
 
+        # Check if requesting a static file from dist root (favicon, etc.)
+        static_file_path = os.path.join(static_dir, full_path)
+        if os.path.isfile(static_file_path) and not full_path.startswith("."):
+            return FileResponse(static_file_path)
+
         # Serve SPA for all other routes (including /project/*)
         index_path = os.path.join(static_dir, "index.html")
         if os.path.exists(index_path):
             return FileResponse(index_path)
 
         from fastapi import HTTPException
+
         raise HTTPException(status_code=404, detail="Not found")

backend/app/metadata.py

@@ -245,9 +245,10 @@ def extract_tarball_metadata(file: BinaryIO, filename: str) -> Dict[str, Any]:
             break
 
     # Try to split name and version
+    # Handle optional 'v' prefix on version (e.g., package-v1.0.0)
     patterns = [
-        r"^(.+)-(\d+\.\d+(?:\.\d+)?(?:[-._]\w+)?)$",  # name-version
-        r"^(.+)_(\d+\.\d+(?:\.\d+)?(?:[-._]\w+)?)$",   # name_version
+        r"^(.+)-v?(\d+\.\d+(?:\.\d+)?(?:[-_]\w+)?)$",  # name-version or name-vversion
+        r"^(.+)_v?(\d+\.\d+(?:\.\d+)?(?:[-_]\w+)?)$",  # name_version or name_vversion
     ]
 
     for pattern in patterns:

backend/app/models.py

@@ -1,8 +1,17 @@
 from datetime import datetime
-from typing import Optional
 from sqlalchemy import (
-    Column, String, Text, Boolean, Integer, BigInteger,
-    DateTime, ForeignKey, CheckConstraint, Index, JSON
+    Column,
+    String,
+    Text,
+    Boolean,
+    Integer,
+    BigInteger,
+    DateTime,
+    ForeignKey,
+    CheckConstraint,
+    Index,
+    JSON,
+    ARRAY,
 )
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import relationship, declarative_base
@@ -19,11 +28,17 @@ class Project(Base):
     description = Column(Text)
     is_public = Column(Boolean, default=True)
     created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
-    updated_at = Column(DateTime(timezone=True), default=datetime.utcnow, onupdate=datetime.utcnow)
+    updated_at = Column(
+        DateTime(timezone=True), default=datetime.utcnow, onupdate=datetime.utcnow
+    )
     created_by = Column(String(255), nullable=False)
 
-    packages = relationship("Package", back_populates="project", cascade="all, delete-orphan")
-    permissions = relationship("AccessPermission", back_populates="project", cascade="all, delete-orphan")
+    packages = relationship(
+        "Package", back_populates="project", cascade="all, delete-orphan"
+    )
+    permissions = relationship(
+        "AccessPermission", back_populates="project", cascade="all, delete-orphan"
+    )
 
     __table_args__ = (
         Index("idx_projects_name", "name"),
@@ -35,32 +50,47 @@ class Package(Base):
     __tablename__ = "packages"
 
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
-    project_id = Column(UUID(as_uuid=True), ForeignKey("projects.id", ondelete="CASCADE"), nullable=False)
+    project_id = Column(
+        UUID(as_uuid=True),
+        ForeignKey("projects.id", ondelete="CASCADE"),
+        nullable=False,
+    )
     name = Column(String(255), nullable=False)
     description = Column(Text)
     format = Column(String(50), default="generic", nullable=False)
     platform = Column(String(50), default="any", nullable=False)
     created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
-    updated_at = Column(DateTime(timezone=True), default=datetime.utcnow, onupdate=datetime.utcnow)
+    updated_at = Column(
+        DateTime(timezone=True), default=datetime.utcnow, onupdate=datetime.utcnow
+    )
 
     project = relationship("Project", back_populates="packages")
     tags = relationship("Tag", back_populates="package", cascade="all, delete-orphan")
-    uploads = relationship("Upload", back_populates="package", cascade="all, delete-orphan")
-    consumers = relationship("Consumer", back_populates="package", cascade="all, delete-orphan")
+    uploads = relationship(
+        "Upload", back_populates="package", cascade="all, delete-orphan"
+    )
+    consumers = relationship(
+        "Consumer", back_populates="package", cascade="all, delete-orphan"
+    )
+    versions = relationship(
+        "PackageVersion", back_populates="package", cascade="all, delete-orphan"
+    )
 
     __table_args__ = (
         Index("idx_packages_project_id", "project_id"),
         Index("idx_packages_name", "name"),
         Index("idx_packages_format", "format"),
         Index("idx_packages_platform", "platform"),
-        Index("idx_packages_project_name", "project_id", "name", unique=True),  # Composite unique index
+        Index(
+            "idx_packages_project_name", "project_id", "name", unique=True
+        ),  # Composite unique index
         CheckConstraint(
             "format IN ('generic', 'npm', 'pypi', 'docker', 'deb', 'rpm', 'maven', 'nuget', 'helm')",
-            name="check_package_format"
+            name="check_package_format",
         ),
         CheckConstraint(
             "platform IN ('any', 'linux', 'darwin', 'windows', 'linux-amd64', 'linux-arm64', 'darwin-amd64', 'darwin-arm64', 'windows-amd64')",
-            name="check_package_platform"
+            name="check_package_platform",
         ),
         {"extend_existing": True},
     )
@@ -76,7 +106,9 @@ class Artifact(Base):
     checksum_md5 = Column(String(32))  # MD5 hash for additional verification
     checksum_sha1 = Column(String(40))  # SHA1 hash for compatibility
     s3_etag = Column(String(64))  # S3 ETag for verification
-    artifact_metadata = Column("metadata", JSON, default=dict)  # Format-specific metadata (column name is 'metadata')
+    artifact_metadata = Column(
+        "metadata", JSON, default=dict
+    )  # Format-specific metadata (column name is 'metadata')
     created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
     created_by = Column(String(255), nullable=False)
     ref_count = Column(Integer, default=1)
@@ -84,6 +116,7 @@ class Artifact(Base):
 
     tags = relationship("Tag", back_populates="artifact")
     uploads = relationship("Upload", back_populates="artifact")
+    versions = relationship("PackageVersion", back_populates="artifact")
 
     @property
     def sha256(self) -> str:
@@ -113,22 +146,34 @@ class Tag(Base):
     __tablename__ = "tags"
 
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
-    package_id = Column(UUID(as_uuid=True), ForeignKey("packages.id", ondelete="CASCADE"), nullable=False)
+    package_id = Column(
+        UUID(as_uuid=True),
+        ForeignKey("packages.id", ondelete="CASCADE"),
+        nullable=False,
+    )
     name = Column(String(255), nullable=False)
     artifact_id = Column(String(64), ForeignKey("artifacts.id"), nullable=False)
     created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
-    updated_at = Column(DateTime(timezone=True), default=datetime.utcnow, onupdate=datetime.utcnow)
+    updated_at = Column(
+        DateTime(timezone=True), default=datetime.utcnow, onupdate=datetime.utcnow
+    )
     created_by = Column(String(255), nullable=False)
 
     package = relationship("Package", back_populates="tags")
     artifact = relationship("Artifact", back_populates="tags")
-    history = relationship("TagHistory", back_populates="tag", cascade="all, delete-orphan")
+    history = relationship(
+        "TagHistory", back_populates="tag", cascade="all, delete-orphan"
+    )
 
     __table_args__ = (
         Index("idx_tags_package_id", "package_id"),
         Index("idx_tags_artifact_id", "artifact_id"),
-        Index("idx_tags_package_name", "package_id", "name", unique=True),  # Composite unique index
-        Index("idx_tags_package_created_at", "package_id", "created_at"),  # For recent tags queries
+        Index(
+            "idx_tags_package_name", "package_id", "name", unique=True
+        ),  # Composite unique index
+        Index(
+            "idx_tags_package_created_at", "package_id", "created_at"
+        ),  # For recent tags queries
     )
 
 
@@ -136,7 +181,9 @@ class TagHistory(Base):
     __tablename__ = "tag_history"
 
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
-    tag_id = Column(UUID(as_uuid=True), ForeignKey("tags.id", ondelete="CASCADE"), nullable=False)
+    tag_id = Column(
+        UUID(as_uuid=True), ForeignKey("tags.id", ondelete="CASCADE"), nullable=False
+    )
     old_artifact_id = Column(String(64), ForeignKey("artifacts.id"))
     new_artifact_id = Column(String(64), ForeignKey("artifacts.id"), nullable=False)
     change_type = Column(String(20), nullable=False, default="update")
@@ -148,7 +195,41 @@ class TagHistory(Base):
     __table_args__ = (
         Index("idx_tag_history_tag_id", "tag_id"),
         Index("idx_tag_history_changed_at", "changed_at"),
-        CheckConstraint("change_type IN ('create', 'update', 'delete')", name="check_change_type"),
+        CheckConstraint(
+            "change_type IN ('create', 'update', 'delete')", name="check_change_type"
+        ),
+    )
+
+
+class PackageVersion(Base):
+    """Immutable version record for a package-artifact relationship.
+
+    Separates versions (immutable, set at upload) from tags (mutable labels).
+    Each artifact in a package can have at most one version.
+    """
+
+    __tablename__ = "package_versions"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    package_id = Column(
+        UUID(as_uuid=True),
+        ForeignKey("packages.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    artifact_id = Column(String(64), ForeignKey("artifacts.id"), nullable=False)
+    version = Column(String(255), nullable=False)
+    version_source = Column(String(50))  # 'explicit', 'filename', 'metadata', 'migrated_from_tag'
+    created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
+    created_by = Column(String(255), nullable=False)
+
+    package = relationship("Package", back_populates="versions")
+    artifact = relationship("Artifact", back_populates="versions")
+
+    __table_args__ = (
+        Index("idx_package_versions_package_id", "package_id"),
+        Index("idx_package_versions_artifact_id", "artifact_id"),
+        Index("idx_package_versions_package_version", "package_id", "version", unique=True),
+        Index("idx_package_versions_package_artifact", "package_id", "artifact_id", unique=True),
     )
 
 
@@ -164,6 +245,11 @@ class Upload(Base):
     duration_ms = Column(Integer)  # Upload timing in milliseconds
     deduplicated = Column(Boolean, default=False)  # Whether artifact was deduplicated
     checksum_verified = Column(Boolean, default=True)  # Whether checksum was verified
+    status = Column(
+        String(20), default="completed", nullable=False
+    )  # pending, completed, failed
+    error_message = Column(Text)  # Error details for failed uploads
+    client_checksum = Column(String(64))  # Client-provided SHA256 for verification
     uploaded_at = Column(DateTime(timezone=True), default=datetime.utcnow)
     uploaded_by = Column(String(255), nullable=False)
     source_ip = Column(String(45))
@@ -177,6 +263,35 @@ class Upload(Base):
         Index("idx_uploads_uploaded_at", "uploaded_at"),
         Index("idx_uploads_package_uploaded_at", "package_id", "uploaded_at"),
         Index("idx_uploads_uploaded_by_at", "uploaded_by", "uploaded_at"),
+        Index("idx_uploads_status", "status"),
+        Index("idx_uploads_status_uploaded_at", "status", "uploaded_at"),
+        CheckConstraint(
+            "status IN ('pending', 'completed', 'failed')", name="check_upload_status"
+        ),
+    )
+
+
+class UploadLock(Base):
+    """Track in-progress uploads for conflict detection (409 responses)."""
+
+    __tablename__ = "upload_locks"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    sha256_hash = Column(String(64), nullable=False)
+    package_id = Column(
+        UUID(as_uuid=True),
+        ForeignKey("packages.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    locked_at = Column(DateTime(timezone=True), default=datetime.utcnow)
+    locked_by = Column(String(255), nullable=False)
+    expires_at = Column(DateTime(timezone=True), nullable=False)
+
+    __table_args__ = (
+        Index("idx_upload_locks_expires_at", "expires_at"),
+        Index(
+            "idx_upload_locks_hash_package", "sha256_hash", "package_id", unique=True
+        ),
     )
 
 
@@ -184,7 +299,11 @@ class Consumer(Base):
     __tablename__ = "consumers"
 
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
-    package_id = Column(UUID(as_uuid=True), ForeignKey("packages.id", ondelete="CASCADE"), nullable=False)
+    package_id = Column(
+        UUID(as_uuid=True),
+        ForeignKey("packages.id", ondelete="CASCADE"),
+        nullable=False,
+    )
     project_url = Column(String(2048), nullable=False)
     last_access = Column(DateTime(timezone=True), default=datetime.utcnow)
     created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
@@ -201,7 +320,11 @@ class AccessPermission(Base):
     __tablename__ = "access_permissions"
 
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
-    project_id = Column(UUID(as_uuid=True), ForeignKey("projects.id", ondelete="CASCADE"), nullable=False)
+    project_id = Column(
+        UUID(as_uuid=True),
+        ForeignKey("projects.id", ondelete="CASCADE"),
+        nullable=False,
+    )
     user_id = Column(String(255), nullable=False)
     level = Column(String(20), nullable=False)
     created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
@@ -216,20 +339,104 @@ class AccessPermission(Base):
     )
 
 
+class User(Base):
+    """User account for authentication."""
+
+    __tablename__ = "users"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    username = Column(String(255), unique=True, nullable=False)
+    password_hash = Column(String(255))  # NULL if OIDC-only user
+    email = Column(String(255))
+    is_admin = Column(Boolean, default=False)
+    is_active = Column(Boolean, default=True)
+    must_change_password = Column(Boolean, default=False)
+    oidc_subject = Column(String(255))  # OIDC subject claim
+    oidc_issuer = Column(String(512))  # OIDC issuer URL
+    created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
+    updated_at = Column(
+        DateTime(timezone=True), default=datetime.utcnow, onupdate=datetime.utcnow
+    )
+    last_login = Column(DateTime(timezone=True))
+
+    # Relationships
+    api_keys = relationship(
+        "APIKey", back_populates="owner", cascade="all, delete-orphan"
+    )
+    sessions = relationship(
+        "Session", back_populates="user", cascade="all, delete-orphan"
+    )
+
+    __table_args__ = (
+        Index("idx_users_username", "username"),
+        Index("idx_users_email", "email"),
+        Index("idx_users_oidc_subject", "oidc_subject"),
+    )
+
+
+class Session(Base):
+    """User session for web login."""
+
+    __tablename__ = "sessions"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    user_id = Column(
+        UUID(as_uuid=True),
+        ForeignKey("users.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    token_hash = Column(String(64), unique=True, nullable=False)
+    created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
+    expires_at = Column(DateTime(timezone=True), nullable=False)
+    last_accessed = Column(DateTime(timezone=True), default=datetime.utcnow)
+    user_agent = Column(String(512))
+    ip_address = Column(String(45))
+
+    user = relationship("User", back_populates="sessions")
+
+    __table_args__ = (
+        Index("idx_sessions_user_id", "user_id"),
+        Index("idx_sessions_token_hash", "token_hash"),
+        Index("idx_sessions_expires_at", "expires_at"),
+    )
+
+
+class AuthSettings(Base):
+    """Authentication settings for OIDC configuration."""
+
+    __tablename__ = "auth_settings"
+
+    key = Column(String(255), primary_key=True)
+    value = Column(Text, nullable=False)
+    updated_at = Column(DateTime(timezone=True), default=datetime.utcnow)
+
+
 class APIKey(Base):
     __tablename__ = "api_keys"
 
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
     key_hash = Column(String(64), unique=True, nullable=False)
     name = Column(String(255), nullable=False)
-    user_id = Column(String(255), nullable=False)
+    user_id = Column(
+        String(255), nullable=False
+    )  # Legacy field, kept for compatibility
+    owner_id = Column(
+        UUID(as_uuid=True),
+        ForeignKey("users.id", ondelete="CASCADE"),
+        nullable=True,  # Nullable for migration compatibility
+    )
+    description = Column(Text)
+    scopes = Column(ARRAY(String), default=["read", "write"])
     created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
     expires_at = Column(DateTime(timezone=True))
     last_used = Column(DateTime(timezone=True))
 
+    owner = relationship("User", back_populates="api_keys")
+
     __table_args__ = (
         Index("idx_api_keys_user_id", "user_id"),
         Index("idx_api_keys_key_hash", "key_hash"),
+        Index("idx_api_keys_owner_id", "owner_id"),
     )
 
 
@@ -252,3 +459,51 @@ class AuditLog(Base):
         Index("idx_audit_logs_resource_timestamp", "resource", "timestamp"),
         Index("idx_audit_logs_user_timestamp", "user_id", "timestamp"),
     )
+
+
+class ProjectHistory(Base):
+    """Track changes to project metadata over time."""
+
+    __tablename__ = "project_history"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    project_id = Column(
+        UUID(as_uuid=True),
+        ForeignKey("projects.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    field_name = Column(String(100), nullable=False)
+    old_value = Column(Text)
+    new_value = Column(Text)
+    changed_at = Column(DateTime(timezone=True), default=datetime.utcnow)
+    changed_by = Column(String(255), nullable=False)
+
+    __table_args__ = (
+        Index("idx_project_history_project_id", "project_id"),
+        Index("idx_project_history_changed_at", "changed_at"),
+        Index("idx_project_history_project_changed_at", "project_id", "changed_at"),
+    )
+
+
+class PackageHistory(Base):
+    """Track changes to package metadata over time."""
+
+    __tablename__ = "package_history"
+
+    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    package_id = Column(
+        UUID(as_uuid=True),
+        ForeignKey("packages.id", ondelete="CASCADE"),
+        nullable=False,
+    )
+    field_name = Column(String(100), nullable=False)
+    old_value = Column(Text)
+    new_value = Column(Text)
+    changed_at = Column(DateTime(timezone=True), default=datetime.utcnow)
+    changed_by = Column(String(255), nullable=False)
+
+    __table_args__ = (
+        Index("idx_package_history_package_id", "package_id"),
+        Index("idx_package_history_changed_at", "changed_at"),
+        Index("idx_package_history_package_changed_at", "package_id", "changed_at"),
+    )

backend/app/rate_limit.py

@@ -0,0 +1,16 @@
+"""Rate limiting configuration for Orchard API.
+
+Uses slowapi for rate limiting with IP-based keys.
+"""
+
+import os
+from slowapi import Limiter
+from slowapi.util import get_remote_address
+
+# Rate limiter - uses IP address as key
+limiter = Limiter(key_func=get_remote_address)
+
+# Rate limit strings - configurable via environment for testing
+# Default: 5 login attempts per minute per IP
+# In tests: set ORCHARD_LOGIN_RATE_LIMIT to a high value like "1000/minute"
+LOGIN_RATE_LIMIT = os.environ.get("ORCHARD_LOGIN_RATE_LIMIT", "5/minute")

backend/app/schemas.py

@@ -1,6 +1,6 @@
 from datetime import datetime
 from typing import Optional, List, Dict, Any, Generic, TypeVar
-from pydantic import BaseModel
+from pydantic import BaseModel, field_validator
 from uuid import UUID
 
 T = TypeVar("T")
@@ -12,6 +12,7 @@ class PaginationMeta(BaseModel):
     limit: int
     total: int
     total_pages: int
+    has_more: bool = False  # True if there are more pages after current page
 
 
 class PaginatedResponse(BaseModel, Generic[T]):
@@ -39,6 +40,20 @@ class ProjectResponse(BaseModel):
         from_attributes = True
 
 
+class ProjectUpdate(BaseModel):
+    """Schema for updating a project"""
+
+    description: Optional[str] = None
+    is_public: Optional[bool] = None
+
+
+class ProjectWithAccessResponse(ProjectResponse):
+    """Project response with user's access level included"""
+
+    access_level: Optional[str] = None  # 'read', 'write', 'admin', or None
+    is_owner: bool = False
+
+
 # Package format and platform enums
 PACKAGE_FORMATS = [
     "generic",
@@ -86,6 +101,14 @@ class PackageResponse(BaseModel):
         from_attributes = True
 
 
+class PackageUpdate(BaseModel):
+    """Schema for updating a package"""
+
+    description: Optional[str] = None
+    format: Optional[str] = None
+    platform: Optional[str] = None
+
+
 class TagSummary(BaseModel):
     """Lightweight tag info for embedding in package responses"""
 
@@ -150,6 +173,7 @@ class TagResponse(BaseModel):
     artifact_id: str
     created_at: datetime
     created_by: str
+    version: Optional[str] = None  # Version of the artifact this tag points to
 
     class Config:
         from_attributes = True
@@ -164,6 +188,7 @@ class TagDetailResponse(BaseModel):
     artifact_id: str
     created_at: datetime
     created_by: str
+    version: Optional[str] = None  # Version of the artifact this tag points to
     # Artifact metadata
     artifact_size: int
     artifact_content_type: Optional[str]
@@ -189,6 +214,93 @@ class TagHistoryResponse(BaseModel):
         from_attributes = True
 
 
+class TagHistoryDetailResponse(BaseModel):
+    """Tag history with artifact metadata for each version"""
+
+    id: UUID
+    tag_id: UUID
+    tag_name: str
+    old_artifact_id: Optional[str]
+    new_artifact_id: str
+    changed_at: datetime
+    changed_by: str
+    # Artifact metadata for new artifact
+    artifact_size: int
+    artifact_original_name: Optional[str]
+    artifact_content_type: Optional[str]
+
+    class Config:
+        from_attributes = True
+
+
+# Audit log schemas
+class AuditLogResponse(BaseModel):
+    """Audit log entry response"""
+
+    id: UUID
+    action: str
+    resource: str
+    user_id: str
+    details: Optional[Dict[str, Any]]
+    timestamp: datetime
+    source_ip: Optional[str]
+
+    class Config:
+        from_attributes = True
+
+
+# Upload history schemas
+class UploadHistoryResponse(BaseModel):
+    """Upload event with artifact details"""
+
+    id: UUID
+    artifact_id: str
+    package_id: UUID
+    package_name: str
+    project_name: str
+    original_name: Optional[str]
+    tag_name: Optional[str]
+    uploaded_at: datetime
+    uploaded_by: str
+    source_ip: Optional[str]
+    deduplicated: bool
+    # Artifact metadata
+    artifact_size: int
+    artifact_content_type: Optional[str]
+
+    class Config:
+        from_attributes = True
+
+
+# Artifact provenance schemas
+class ArtifactProvenanceResponse(BaseModel):
+    """Full provenance/history of an artifact"""
+
+    artifact_id: str
+    sha256: str
+    size: int
+    content_type: Optional[str]
+    original_name: Optional[str]
+    created_at: datetime
+    created_by: str
+    ref_count: int
+    # First upload info
+    first_uploaded_at: datetime
+    first_uploaded_by: str
+    # Usage statistics
+    upload_count: int
+    # References
+    packages: List[Dict[str, Any]]  # List of {project_name, package_name, tag_names}
+    tags: List[
+        Dict[str, Any]
+    ]  # List of {project_name, package_name, tag_name, created_at}
+    # Upload history
+    uploads: List[Dict[str, Any]]  # List of upload events
+
+    class Config:
+        from_attributes = True
+
+
 class ArtifactTagInfo(BaseModel):
     """Tag info for embedding in artifact responses"""
 
@@ -240,6 +352,45 @@ class PackageArtifactResponse(BaseModel):
         from_attributes = True
 
 
+class GlobalArtifactResponse(BaseModel):
+    """Artifact with project/package context for global listing"""
+
+    id: str
+    sha256: str
+    size: int
+    content_type: Optional[str]
+    original_name: Optional[str]
+    created_at: datetime
+    created_by: str
+    format_metadata: Optional[Dict[str, Any]] = None
+    ref_count: int = 0
+    # Context from tags/packages
+    projects: List[str] = []  # List of project names containing this artifact
+    packages: List[str] = []  # List of "project/package" paths
+    tags: List[str] = []  # List of "project/package:tag" references
+
+    class Config:
+        from_attributes = True
+
+
+class GlobalTagResponse(BaseModel):
+    """Tag with project/package context for global listing"""
+
+    id: UUID
+    name: str
+    artifact_id: str
+    created_at: datetime
+    created_by: str
+    project_name: str
+    package_name: str
+    artifact_size: Optional[int] = None
+    artifact_content_type: Optional[str] = None
+    version: Optional[str] = None  # Version of the artifact this tag points to
+
+    class Config:
+        from_attributes = True
+
+
 # Upload response
 class UploadResponse(BaseModel):
     artifact_id: str
@@ -248,12 +399,22 @@ class UploadResponse(BaseModel):
     project: str
     package: str
     tag: Optional[str]
+    version: Optional[str] = None  # Version assigned to this artifact
+    version_source: Optional[str] = None  # How version was determined: 'explicit', 'filename', 'metadata'
     checksum_md5: Optional[str] = None
     checksum_sha1: Optional[str] = None
     s3_etag: Optional[str] = None
     format_metadata: Optional[Dict[str, Any]] = None
     deduplicated: bool = False
     ref_count: int = 1  # Current reference count after this upload
+    # Enhanced metadata (Issue #19)
+    upload_id: Optional[UUID] = None  # UUID of the upload record
+    content_type: Optional[str] = None
+    original_name: Optional[str] = None
+    created_at: Optional[datetime] = None
+    # Upload metrics (Issue #43)
+    duration_ms: Optional[int] = None  # Upload duration in milliseconds
+    throughput_mbps: Optional[float] = None  # Upload throughput in MB/s
 
 
 # Resumable upload schemas
@@ -265,6 +426,19 @@ class ResumableUploadInitRequest(BaseModel):
     content_type: Optional[str] = None
     size: int
     tag: Optional[str] = None
+    version: Optional[str] = None  # Explicit version (auto-detected if not provided)
+
+    @field_validator("expected_hash")
+    @classmethod
+    def validate_sha256_hash(cls, v: str) -> str:
+        """Validate that expected_hash is a valid 64-character lowercase hex SHA256 hash."""
+        import re
+
+        if not re.match(r"^[a-f0-9]{64}$", v.lower()):
+            raise ValueError(
+                "expected_hash must be a valid 64-character lowercase hexadecimal SHA256 hash"
+            )
+        return v.lower()  # Normalize to lowercase
 
 
 class ResumableUploadInitResponse(BaseModel):
@@ -307,6 +481,21 @@ class ResumableUploadStatusResponse(BaseModel):
     total_uploaded_bytes: int
 
 
+class UploadProgressResponse(BaseModel):
+    """Progress information for an in-flight upload"""
+
+    upload_id: str
+    status: str  # 'in_progress', 'completed', 'failed', 'not_found'
+    bytes_uploaded: int = 0
+    bytes_total: Optional[int] = None
+    percent_complete: Optional[float] = None
+    parts_uploaded: int = 0
+    parts_total: Optional[int] = None
+    started_at: Optional[datetime] = None
+    elapsed_seconds: Optional[float] = None
+    throughput_mbps: Optional[float] = None
+
+
 # Consumer schemas
 class ConsumerResponse(BaseModel):
     id: UUID
@@ -319,6 +508,35 @@ class ConsumerResponse(BaseModel):
         from_attributes = True
 
 
+# Package version schemas
+class PackageVersionResponse(BaseModel):
+    """Immutable version record for an artifact in a package"""
+
+    id: UUID
+    package_id: UUID
+    artifact_id: str
+    version: str
+    version_source: Optional[str] = None  # 'explicit', 'filename', 'metadata', 'migrated_from_tag'
+    created_at: datetime
+    created_by: str
+    # Enriched fields from joins
+    size: Optional[int] = None
+    content_type: Optional[str] = None
+    original_name: Optional[str] = None
+    tags: List[str] = []  # Tag names pointing to this artifact
+
+    class Config:
+        from_attributes = True
+
+
+class PackageVersionDetailResponse(PackageVersionResponse):
+    """Version with full artifact metadata"""
+
+    format_metadata: Optional[Dict[str, Any]] = None
+    checksum_md5: Optional[str] = None
+    checksum_sha1: Optional[str] = None
+
+
 # Global search schemas
 class SearchResultProject(BaseModel):
     """Project result for global search"""
@@ -428,6 +646,19 @@ class StorageStatsResponse(BaseModel):
     storage_saved_bytes: int  # Bytes saved through deduplication
 
 
+class ConsistencyCheckResponse(BaseModel):
+    """Result of S3/Database consistency check"""
+
+    total_artifacts_checked: int
+    orphaned_s3_objects: int  # Objects in S3 but not in DB
+    missing_s3_objects: int  # Records in DB but not in S3
+    size_mismatches: int  # Records where DB size != S3 size
+    healthy: bool
+    orphaned_s3_keys: List[str] = []  # Limited list of orphaned S3 keys
+    missing_s3_keys: List[str] = []  # Limited list of missing S3 keys
+    size_mismatch_artifacts: List[Dict[str, Any]] = []  # Limited list of mismatches
+
+
 class DeduplicationStatsResponse(BaseModel):
     """Deduplication effectiveness statistics"""
 
@@ -515,3 +746,173 @@ class StatsReportResponse(BaseModel):
     format: str  # "json", "csv", "markdown"
     generated_at: datetime
     content: str  # The report content
+
+
+# Authentication schemas
+class LoginRequest(BaseModel):
+    """Login request with username and password"""
+    username: str
+    password: str
+
+
+class LoginResponse(BaseModel):
+    """Login response with user info"""
+    id: UUID
+    username: str
+    email: Optional[str]
+    is_admin: bool
+    must_change_password: bool
+
+
+class ChangePasswordRequest(BaseModel):
+    """Change password request"""
+    current_password: str
+    new_password: str
+
+
+class UserResponse(BaseModel):
+    """User information response"""
+    id: UUID
+    username: str
+    email: Optional[str]
+    is_admin: bool
+    is_active: bool
+    must_change_password: bool
+    created_at: datetime
+    last_login: Optional[datetime]
+
+    class Config:
+        from_attributes = True
+
+
+class UserCreate(BaseModel):
+    """Create user request (admin only)"""
+    username: str
+    password: str
+    email: Optional[str] = None
+    is_admin: bool = False
+
+
+class UserUpdate(BaseModel):
+    """Update user request (admin only)"""
+    email: Optional[str] = None
+    is_admin: Optional[bool] = None
+    is_active: Optional[bool] = None
+
+
+class ResetPasswordRequest(BaseModel):
+    """Reset password request (admin only)"""
+    new_password: str
+
+
+class APIKeyCreate(BaseModel):
+    """Create API key request"""
+    name: str
+    description: Optional[str] = None
+    scopes: Optional[List[str]] = None
+
+
+class APIKeyResponse(BaseModel):
+    """API key response (without the secret key)"""
+    id: UUID
+    name: str
+    description: Optional[str]
+    scopes: Optional[List[str]]
+    created_at: datetime
+    expires_at: Optional[datetime]
+    last_used: Optional[datetime]
+
+    class Config:
+        from_attributes = True
+
+
+class APIKeyCreateResponse(BaseModel):
+    """API key creation response (includes the secret key - only shown once)"""
+    id: UUID
+    name: str
+    description: Optional[str]
+    scopes: Optional[List[str]]
+    key: str  # The actual API key - only returned on creation
+    created_at: datetime
+    expires_at: Optional[datetime]
+
+
+# OIDC Configuration schemas
+class OIDCConfigResponse(BaseModel):
+    """OIDC configuration response (hides client secret)"""
+    enabled: bool
+    issuer_url: str
+    client_id: str
+    has_client_secret: bool  # True if secret is configured, but don't expose it
+    scopes: List[str]
+    auto_create_users: bool
+    admin_group: str
+
+
+class OIDCConfigUpdate(BaseModel):
+    """Update OIDC configuration"""
+    enabled: Optional[bool] = None
+    issuer_url: Optional[str] = None
+    client_id: Optional[str] = None
+    client_secret: Optional[str] = None  # Only set if changing
+    scopes: Optional[List[str]] = None
+    auto_create_users: Optional[bool] = None
+    admin_group: Optional[str] = None
+
+
+class OIDCStatusResponse(BaseModel):
+    """Public OIDC status response"""
+    enabled: bool
+    issuer_url: Optional[str] = None  # Only included if enabled
+
+
+class OIDCLoginResponse(BaseModel):
+    """OIDC login initiation response"""
+    authorization_url: str
+
+
+# Access Permission schemas
+class AccessPermissionCreate(BaseModel):
+    """Grant access to a user for a project"""
+    username: str
+    level: str  # 'read', 'write', or 'admin'
+    expires_at: Optional[datetime] = None
+
+    @field_validator('level')
+    @classmethod
+    def validate_level(cls, v):
+        if v not in ('read', 'write', 'admin'):
+            raise ValueError("level must be 'read', 'write', or 'admin'")
+        return v
+
+
+class AccessPermissionUpdate(BaseModel):
+    """Update access permission"""
+    level: Optional[str] = None
+    expires_at: Optional[datetime] = None
+
+    @field_validator('level')
+    @classmethod
+    def validate_level(cls, v):
+        if v is not None and v not in ('read', 'write', 'admin'):
+            raise ValueError("level must be 'read', 'write', or 'admin'")
+        return v
+
+
+class AccessPermissionResponse(BaseModel):
+    """Access permission response"""
+    id: UUID
+    project_id: UUID
+    user_id: str
+    level: str
+    created_at: datetime
+    expires_at: Optional[datetime]
+
+    class Config:
+        from_attributes = True
+
+
+class ProjectWithAccessResponse(ProjectResponse):
+    """Project response with user's access level"""
+    user_access_level: Optional[str] = None
+

backend/app/seed.py

@@ -5,7 +5,7 @@ import hashlib
 import logging
 from sqlalchemy.orm import Session
 
-from .models import Project, Package, Artifact, Tag, Upload
+from .models import Project, Package, Artifact, Tag, Upload, PackageVersion
 from .storage import get_storage
 
 logger = logging.getLogger(__name__)
@@ -74,7 +74,7 @@ TEST_PROJECTS = [
     },
 ]
 
-# Sample artifacts to create (content, tags)
+# Sample artifacts to create (content, tags, version)
 TEST_ARTIFACTS = [
     {
         "project": "frontend-libs",
@@ -83,6 +83,7 @@ TEST_ARTIFACTS = [
         "filename": "ui-components-1.0.0.js",
         "content_type": "application/javascript",
         "tags": ["v1.0.0", "latest"],
+        "version": "1.0.0",
     },
     {
         "project": "frontend-libs",
@@ -91,6 +92,7 @@ TEST_ARTIFACTS = [
         "filename": "ui-components-1.1.0.js",
         "content_type": "application/javascript",
         "tags": ["v1.1.0"],
+        "version": "1.1.0",
     },
     {
         "project": "frontend-libs",
@@ -99,6 +101,7 @@ TEST_ARTIFACTS = [
         "filename": "tokens.json",
         "content_type": "application/json",
         "tags": ["v1.0.0", "latest"],
+        "version": "1.0.0",
     },
     {
         "project": "backend-services",
@@ -107,6 +110,7 @@ TEST_ARTIFACTS = [
         "filename": "utils-2.0.0.py",
         "content_type": "text/x-python",
         "tags": ["v2.0.0", "stable", "latest"],
+        "version": "2.0.0",
     },
     {
         "project": "backend-services",
@@ -115,6 +119,7 @@ TEST_ARTIFACTS = [
         "filename": "auth-lib-1.0.0.go",
         "content_type": "text/x-go",
         "tags": ["v1.0.0", "latest"],
+        "version": "1.0.0",
     },
 ]
 
@@ -160,9 +165,10 @@ def seed_database(db: Session) -> None:
 
     logger.info(f"Created {len(project_map)} projects and {len(package_map)} packages")
 
-    # Create artifacts and tags
+    # Create artifacts, tags, and versions
     artifact_count = 0
     tag_count = 0
+    version_count = 0
 
     for artifact_data in TEST_ARTIFACTS:
         project = project_map[artifact_data["project"]]
@@ -184,6 +190,11 @@ def seed_database(db: Session) -> None:
             logger.warning(f"Failed to store artifact in S3: {e}")
             continue
 
+        # Calculate ref_count: tags + version (if present)
+        ref_count = len(artifact_data["tags"])
+        if artifact_data.get("version"):
+            ref_count += 1
+
         # Create artifact record
         artifact = Artifact(
             id=sha256_hash,
@@ -192,7 +203,7 @@ def seed_database(db: Session) -> None:
             original_name=artifact_data["filename"],
             created_by="seed-user",
             s3_key=s3_key,
-            ref_count=len(artifact_data["tags"]),
+            ref_count=ref_count,
         )
         db.add(artifact)
 
@@ -206,6 +217,18 @@ def seed_database(db: Session) -> None:
         db.add(upload)
         artifact_count += 1
 
+        # Create version record if specified
+        if artifact_data.get("version"):
+            version = PackageVersion(
+                package_id=package.id,
+                artifact_id=sha256_hash,
+                version=artifact_data["version"],
+                version_source="explicit",
+                created_by="seed-user",
+            )
+            db.add(version)
+            version_count += 1
+
         # Create tags
         for tag_name in artifact_data["tags"]:
             tag = Tag(
@@ -218,5 +241,5 @@ def seed_database(db: Session) -> None:
             tag_count += 1
 
     db.commit()
-    logger.info(f"Created {artifact_count} artifacts and {tag_count} tags")
+    logger.info(f"Created {artifact_count} artifacts, {tag_count} tags, and {version_count} versions")
     logger.info("Database seeding complete")

backend/app/services/artifact_cleanup.py

@@ -6,7 +6,7 @@ from typing import List, Optional, Tuple
 from sqlalchemy.orm import Session
 import logging
 
-from ..models import Artifact, Tag, Upload, Package
+from ..models import Artifact, Tag
 from ..repositories.artifact import ArtifactRepository
 from ..repositories.tag import TagRepository
 from ..storage import S3Storage
@@ -40,10 +40,14 @@ class ArtifactCleanupService:
         artifact = self.artifact_repo.get_by_sha256(artifact_id)
         if artifact:
             artifact = self.artifact_repo.decrement_ref_count(artifact)
-            logger.info(f"Decremented ref_count for artifact {artifact_id}: now {artifact.ref_count}")
+            logger.info(
+                f"Decremented ref_count for artifact {artifact_id}: now {artifact.ref_count}"
+            )
         return artifact
 
-    def on_tag_updated(self, old_artifact_id: str, new_artifact_id: str) -> Tuple[Optional[Artifact], Optional[Artifact]]:
+    def on_tag_updated(
+        self, old_artifact_id: str, new_artifact_id: str
+    ) -> Tuple[Optional[Artifact], Optional[Artifact]]:
         """
         Called when a tag is updated to point to a different artifact.
         Decrements ref_count for old artifact, increments for new (if different).
@@ -58,13 +62,17 @@ class ArtifactCleanupService:
             old_artifact = self.artifact_repo.get_by_sha256(old_artifact_id)
             if old_artifact:
                 old_artifact = self.artifact_repo.decrement_ref_count(old_artifact)
-                logger.info(f"Decremented ref_count for old artifact {old_artifact_id}: now {old_artifact.ref_count}")
+                logger.info(
+                    f"Decremented ref_count for old artifact {old_artifact_id}: now {old_artifact.ref_count}"
+                )
 
             # Increment new artifact ref_count
             new_artifact = self.artifact_repo.get_by_sha256(new_artifact_id)
             if new_artifact:
                 new_artifact = self.artifact_repo.increment_ref_count(new_artifact)
-                logger.info(f"Incremented ref_count for new artifact {new_artifact_id}: now {new_artifact.ref_count}")
+                logger.info(
+                    f"Incremented ref_count for new artifact {new_artifact_id}: now {new_artifact.ref_count}"
+                )
 
         return old_artifact, new_artifact
 
@@ -84,11 +92,15 @@ class ArtifactCleanupService:
             if artifact:
                 self.artifact_repo.decrement_ref_count(artifact)
                 affected_artifacts.append(tag.artifact_id)
-                logger.info(f"Decremented ref_count for artifact {tag.artifact_id} (package delete)")
+                logger.info(
+                    f"Decremented ref_count for artifact {tag.artifact_id} (package delete)"
+                )
 
         return affected_artifacts
 
-    def cleanup_orphaned_artifacts(self, batch_size: int = 100, dry_run: bool = False) -> List[str]:
+    def cleanup_orphaned_artifacts(
+        self, batch_size: int = 100, dry_run: bool = False
+    ) -> List[str]:
         """
         Find and delete artifacts with ref_count = 0.
 
@@ -116,7 +128,9 @@ class ArtifactCleanupService:
                     # Then delete from database
                     self.artifact_repo.delete(artifact)
                     deleted_ids.append(artifact.id)
-                    logger.info(f"Deleted orphaned artifact from database: {artifact.id}")
+                    logger.info(
+                        f"Deleted orphaned artifact from database: {artifact.id}"
+                    )
                 except Exception as e:
                     logger.error(f"Failed to delete artifact {artifact.id}: {e}")
 
@@ -128,10 +142,12 @@ class ArtifactCleanupService:
     def get_orphaned_count(self) -> int:
         """Get count of artifacts with ref_count = 0."""
         from sqlalchemy import func
+
         return (
             self.db.query(func.count(Artifact.id))
             .filter(Artifact.ref_count == 0)
-            .scalar() or 0
+            .scalar()
+            or 0
         )
 
     def verify_ref_counts(self, fix: bool = False) -> List[dict]:
@@ -173,7 +189,9 @@ class ArtifactCleanupService:
 
                 if fix:
                     artifact.ref_count = max(actual_count, 1)
-                    logger.warning(f"Fixed ref_count for artifact {artifact.id}: {mismatch['stored_ref_count']} -> {artifact.ref_count}")
+                    logger.warning(
+                        f"Fixed ref_count for artifact {artifact.id}: {mismatch['stored_ref_count']} -> {artifact.ref_count}"
+                    )
 
         if fix and mismatches:
             self.db.commit()

backend/app/storage.py

@@ -1,13 +1,11 @@
 import hashlib
 import logging
-from abc import ABC, abstractmethod
 from typing import (
     BinaryIO,
     Tuple,
     Optional,
     Dict,
     Any,
-    Generator,
     NamedTuple,
     Protocol,
     runtime_checkable,
@@ -23,6 +21,13 @@ from botocore.exceptions import (
 )
 
 from .config import get_settings
+from .checksum import (
+    ChecksumMismatchError,
+    HashingStreamWrapper,
+    VerifyingStreamWrapper,
+    compute_sha256,
+    is_valid_sha256,
+)
 
 settings = get_settings()
 logger = logging.getLogger(__name__)
@@ -176,6 +181,12 @@ class HashComputationError(StorageError):
     pass
 
 
+class FileSizeExceededError(StorageError):
+    """Raised when file exceeds maximum size during upload"""
+
+    pass
+
+
 class S3ExistenceCheckError(StorageError):
     """Raised when S3 existence check fails after retries"""
 
@@ -197,6 +208,9 @@ class StorageResult(NamedTuple):
     md5: Optional[str] = None
     sha1: Optional[str] = None
     s3_etag: Optional[str] = None
+    already_existed: bool = (
+        False  # True if artifact was deduplicated (S3 object already existed)
+    )
 
 
 class S3StorageUnavailableError(StorageError):
@@ -228,15 +242,19 @@ class S3Storage:
             },
         )
 
-        self.client = boto3.client(
-            "s3",
-            endpoint_url=settings.s3_endpoint if settings.s3_endpoint else None,
-            region_name=settings.s3_region,
-            aws_access_key_id=settings.s3_access_key_id,
-            aws_secret_access_key=settings.s3_secret_access_key,
-            config=config,
-            verify=settings.s3_verify_ssl,  # SSL/TLS verification
-        )
+        # Build client kwargs - only include credentials if explicitly provided
+        # This allows IRSA/IAM role credentials to be used when no explicit creds are set
+        client_kwargs = {
+            "endpoint_url": settings.s3_endpoint if settings.s3_endpoint else None,
+            "region_name": settings.s3_region,
+            "config": config,
+            "verify": settings.s3_verify_ssl,
+        }
+        if settings.s3_access_key_id and settings.s3_secret_access_key:
+            client_kwargs["aws_access_key_id"] = settings.s3_access_key_id
+            client_kwargs["aws_secret_access_key"] = settings.s3_secret_access_key
+
+        self.client = boto3.client("s3", **client_kwargs)
         self.bucket = settings.s3_bucket
         # Store active multipart uploads for resumable support
         self._active_uploads: Dict[str, Dict[str, Any]] = {}
@@ -261,6 +279,7 @@ class S3Storage:
 
         Raises:
             HashComputationError: If hash computation fails
+            FileSizeExceededError: If file exceeds maximum size
             S3ExistenceCheckError: If S3 existence check fails after retries
             S3UploadError: If S3 upload fails
         """
@@ -270,11 +289,18 @@ class S3Storage:
             if not content:
                 raise HashComputationError("Empty file content")
 
+            size = len(content)
+
+            # Enforce file size limit (protection against Content-Length spoofing)
+            if size > settings.max_file_size:
+                raise FileSizeExceededError(
+                    f"File size {size} exceeds maximum {settings.max_file_size}"
+                )
+
             sha256_hash = hashlib.sha256(content).hexdigest()
             md5_hash = hashlib.md5(content).hexdigest()
             sha1_hash = hashlib.sha1(content).hexdigest()
-            size = len(content)
-        except HashComputationError:
+        except (HashComputationError, FileSizeExceededError):
             raise
         except Exception as e:
             logger.error(f"Hash computation failed: {e}")
@@ -341,6 +367,7 @@ class S3Storage:
             md5=md5_hash,
             sha1=sha1_hash,
             s3_etag=s3_etag,
+            already_existed=exists,
         )
 
     def _store_multipart(self, file: BinaryIO, content_length: int) -> StorageResult:
@@ -349,15 +376,22 @@ class S3Storage:
 
         Raises:
             HashComputationError: If hash computation fails
+            FileSizeExceededError: If file exceeds maximum size
             S3ExistenceCheckError: If S3 existence check fails after retries
             S3UploadError: If S3 upload fails
         """
         # First pass: compute all hashes by streaming through file
         try:
+            import time
             sha256_hasher = hashlib.sha256()
             md5_hasher = hashlib.md5()
             sha1_hasher = hashlib.sha1()
             size = 0
+            hash_start_time = time.time()
+            last_log_time = hash_start_time
+            log_interval_seconds = 5  # Log progress every 5 seconds
+
+            logger.info(f"Computing hashes for large file: expected_size={content_length}")
 
             # Read file in chunks to compute hashes
             while True:
@@ -369,13 +403,39 @@ class S3Storage:
                 sha1_hasher.update(chunk)
                 size += len(chunk)
 
+                # Log hash computation progress periodically
+                current_time = time.time()
+                if current_time - last_log_time >= log_interval_seconds:
+                    elapsed = current_time - hash_start_time
+                    percent = (size / content_length) * 100 if content_length > 0 else 0
+                    throughput = (size / (1024 * 1024)) / elapsed if elapsed > 0 else 0
+                    logger.info(
+                        f"Hash computation progress: bytes={size}/{content_length} ({percent:.1f}%) "
+                        f"throughput={throughput:.2f}MB/s"
+                    )
+                    last_log_time = current_time
+
+                # Enforce file size limit during streaming (protection against spoofing)
+                if size > settings.max_file_size:
+                    raise FileSizeExceededError(
+                        f"File size exceeds maximum {settings.max_file_size}"
+                    )
+
             if size == 0:
                 raise HashComputationError("Empty file content")
 
             sha256_hash = sha256_hasher.hexdigest()
             md5_hash = md5_hasher.hexdigest()
             sha1_hash = sha1_hasher.hexdigest()
-        except HashComputationError:
+
+            # Log hash computation completion
+            hash_elapsed = time.time() - hash_start_time
+            hash_throughput = (size / (1024 * 1024)) / hash_elapsed if hash_elapsed > 0 else 0
+            logger.info(
+                f"Hash computation completed: hash={sha256_hash[:16]}... "
+                f"size={size} duration={hash_elapsed:.2f}s throughput={hash_throughput:.2f}MB/s"
+            )
+        except (HashComputationError, FileSizeExceededError):
             raise
         except Exception as e:
             logger.error(f"Hash computation failed for multipart upload: {e}")
@@ -413,6 +473,7 @@ class S3Storage:
                 md5=md5_hash,
                 sha1=sha1_hash,
                 s3_etag=s3_etag,
+                already_existed=True,
             )
 
         # Seek back to start for upload
@@ -427,8 +488,19 @@ class S3Storage:
         upload_id = mpu["UploadId"]
 
         try:
+            import time
             parts = []
             part_number = 1
+            bytes_uploaded = 0
+            upload_start_time = time.time()
+            last_log_time = upload_start_time
+            log_interval_seconds = 5  # Log progress every 5 seconds
+
+            total_parts = (content_length + MULTIPART_CHUNK_SIZE - 1) // MULTIPART_CHUNK_SIZE
+            logger.info(
+                f"Starting multipart upload: hash={sha256_hash[:16]}... "
+                f"size={content_length} parts={total_parts}"
+            )
 
             while True:
                 chunk = file.read(MULTIPART_CHUNK_SIZE)
@@ -448,8 +520,32 @@ class S3Storage:
                         "ETag": response["ETag"],
                     }
                 )
+                bytes_uploaded += len(chunk)
+
+                # Log progress periodically
+                current_time = time.time()
+                if current_time - last_log_time >= log_interval_seconds:
+                    elapsed = current_time - upload_start_time
+                    percent = (bytes_uploaded / content_length) * 100
+                    throughput = (bytes_uploaded / (1024 * 1024)) / elapsed if elapsed > 0 else 0
+                    logger.info(
+                        f"Upload progress: hash={sha256_hash[:16]}... "
+                        f"part={part_number}/{total_parts} "
+                        f"bytes={bytes_uploaded}/{content_length} ({percent:.1f}%) "
+                        f"throughput={throughput:.2f}MB/s"
+                    )
+                    last_log_time = current_time
+
                 part_number += 1
 
+            # Log completion
+            total_elapsed = time.time() - upload_start_time
+            final_throughput = (content_length / (1024 * 1024)) / total_elapsed if total_elapsed > 0 else 0
+            logger.info(
+                f"Multipart upload completed: hash={sha256_hash[:16]}... "
+                f"size={content_length} duration={total_elapsed:.2f}s throughput={final_throughput:.2f}MB/s"
+            )
+
             # Complete multipart upload
             complete_response = self.client.complete_multipart_upload(
                 Bucket=self.bucket,
@@ -466,136 +562,34 @@ class S3Storage:
                 md5=md5_hash,
                 sha1=sha1_hash,
                 s3_etag=s3_etag,
+                already_existed=False,
             )
 
         except Exception as e:
             # Abort multipart upload on failure
-            logger.error(f"Multipart upload failed: {e}")
-            self.client.abort_multipart_upload(
-                Bucket=self.bucket,
-                Key=s3_key,
-                UploadId=upload_id,
+            error_str = str(e).lower()
+            is_client_disconnect = (
+                isinstance(e, (ConnectionResetError, BrokenPipeError)) or
+                "connection" in error_str or "broken pipe" in error_str or "reset" in error_str
             )
-            raise
-
-    def store_streaming(self, chunks: Generator[bytes, None, None]) -> StorageResult:
-        """
-        Store a file from a stream of chunks.
-        First accumulates to compute hash, then uploads.
-        For truly large files, consider using initiate_resumable_upload instead.
-        """
-        # Accumulate chunks and compute all hashes
-        sha256_hasher = hashlib.sha256()
-        md5_hasher = hashlib.md5()
-        sha1_hasher = hashlib.sha1()
-        all_chunks = []
-        size = 0
-
-        for chunk in chunks:
-            sha256_hasher.update(chunk)
-            md5_hasher.update(chunk)
-            sha1_hasher.update(chunk)
-            all_chunks.append(chunk)
-            size += len(chunk)
-
-        sha256_hash = sha256_hasher.hexdigest()
-        md5_hash = md5_hasher.hexdigest()
-        sha1_hash = sha1_hasher.hexdigest()
-        s3_key = f"fruits/{sha256_hash[:2]}/{sha256_hash[2:4]}/{sha256_hash}"
-        s3_etag = None
-
-        # Check if already exists
-        if self._exists(s3_key):
-            obj_info = self.get_object_info(s3_key)
-            s3_etag = obj_info.get("etag", "").strip('"') if obj_info else None
-            return StorageResult(
-                sha256=sha256_hash,
-                size=size,
-                s3_key=s3_key,
-                md5=md5_hash,
-                sha1=sha1_hash,
-                s3_etag=s3_etag,
-            )
-
-        # Upload based on size
-        if size < MULTIPART_THRESHOLD:
-            content = b"".join(all_chunks)
-            response = self.client.put_object(
-                Bucket=self.bucket, Key=s3_key, Body=content
-            )
-            s3_etag = response.get("ETag", "").strip('"')
-        else:
-            # Use multipart for large files
-            mpu = self.client.create_multipart_upload(Bucket=self.bucket, Key=s3_key)
-            upload_id = mpu["UploadId"]
+            if is_client_disconnect:
+                logger.warning(
+                    f"Multipart upload aborted (client disconnect): hash={sha256_hash[:16]}... "
+                    f"parts_uploaded={len(parts)} bytes_uploaded={bytes_uploaded}"
+                )
+            else:
+                logger.error(f"Multipart upload failed: hash={sha256_hash[:16]}... error={e}")
 
             try:
-                parts = []
-                part_number = 1
-                buffer = b""
-
-                for chunk in all_chunks:
-                    buffer += chunk
-                    while len(buffer) >= MULTIPART_CHUNK_SIZE:
-                        part_data = buffer[:MULTIPART_CHUNK_SIZE]
-                        buffer = buffer[MULTIPART_CHUNK_SIZE:]
-
-                        response = self.client.upload_part(
-                            Bucket=self.bucket,
-                            Key=s3_key,
-                            UploadId=upload_id,
-                            PartNumber=part_number,
-                            Body=part_data,
-                        )
-                        parts.append(
-                            {
-                                "PartNumber": part_number,
-                                "ETag": response["ETag"],
-                            }
-                        )
-                        part_number += 1
-
-                # Upload remaining buffer
-                if buffer:
-                    response = self.client.upload_part(
-                        Bucket=self.bucket,
-                        Key=s3_key,
-                        UploadId=upload_id,
-                        PartNumber=part_number,
-                        Body=buffer,
-                    )
-                    parts.append(
-                        {
-                            "PartNumber": part_number,
-                            "ETag": response["ETag"],
-                        }
-                    )
-
-                complete_response = self.client.complete_multipart_upload(
-                    Bucket=self.bucket,
-                    Key=s3_key,
-                    UploadId=upload_id,
-                    MultipartUpload={"Parts": parts},
-                )
-                s3_etag = complete_response.get("ETag", "").strip('"')
-
-            except Exception as e:
-                logger.error(f"Streaming multipart upload failed: {e}")
                 self.client.abort_multipart_upload(
                     Bucket=self.bucket,
                     Key=s3_key,
                     UploadId=upload_id,
                 )
-                raise
-
-        return StorageResult(
-            sha256=sha256_hash,
-            size=size,
-            s3_key=s3_key,
-            md5=md5_hash,
-            sha1=sha1_hash,
-            s3_etag=s3_etag,
-        )
+                logger.info(f"Multipart upload aborted and cleaned up: upload_id={upload_id[:16]}...")
+            except Exception as abort_error:
+                logger.error(f"Failed to abort multipart upload: {abort_error}")
+            raise
 
     def initiate_resumable_upload(self, expected_hash: str) -> Dict[str, Any]:
         """
@@ -616,12 +610,17 @@ class S3Storage:
         mpu = self.client.create_multipart_upload(Bucket=self.bucket, Key=s3_key)
         upload_id = mpu["UploadId"]
 
+        import time
         session = {
             "upload_id": upload_id,
             "s3_key": s3_key,
             "already_exists": False,
             "parts": [],
             "expected_hash": expected_hash,
+            "started_at": time.time(),
+            "bytes_uploaded": 0,
+            "expected_size": None,  # Set when init provides size
+            "status": "in_progress",
         }
         self._active_uploads[upload_id] = session
         return session
@@ -648,10 +647,57 @@ class S3Storage:
         part_info = {
             "PartNumber": part_number,
             "ETag": response["ETag"],
+            "size": len(data),
         }
         session["parts"].append(part_info)
+        session["bytes_uploaded"] = session.get("bytes_uploaded", 0) + len(data)
         return part_info
 
+    def get_upload_progress(self, upload_id: str) -> Optional[Dict[str, Any]]:
+        """
+        Get progress information for a resumable upload.
+        Returns None if upload not found.
+        """
+        import time
+        session = self._active_uploads.get(upload_id)
+        if not session:
+            return None
+
+        bytes_uploaded = session.get("bytes_uploaded", 0)
+        expected_size = session.get("expected_size")
+        started_at = session.get("started_at")
+
+        progress = {
+            "upload_id": upload_id,
+            "status": session.get("status", "in_progress"),
+            "bytes_uploaded": bytes_uploaded,
+            "bytes_total": expected_size,
+            "parts_uploaded": len(session.get("parts", [])),
+            "parts_total": None,
+            "started_at": started_at,
+            "elapsed_seconds": None,
+            "percent_complete": None,
+            "throughput_mbps": None,
+        }
+
+        if expected_size and expected_size > 0:
+            progress["percent_complete"] = round((bytes_uploaded / expected_size) * 100, 2)
+            progress["parts_total"] = (expected_size + MULTIPART_CHUNK_SIZE - 1) // MULTIPART_CHUNK_SIZE
+
+        if started_at:
+            elapsed = time.time() - started_at
+            progress["elapsed_seconds"] = round(elapsed, 2)
+            if elapsed > 0 and bytes_uploaded > 0:
+                progress["throughput_mbps"] = round((bytes_uploaded / (1024 * 1024)) / elapsed, 2)
+
+        return progress
+
+    def set_upload_expected_size(self, upload_id: str, size: int):
+        """Set the expected size for an upload (for progress tracking)."""
+        session = self._active_uploads.get(upload_id)
+        if session:
+            session["expected_size"] = size
+
     def complete_resumable_upload(self, upload_id: str) -> Tuple[str, str]:
         """
         Complete a resumable upload.
@@ -789,6 +835,36 @@ class S3Storage:
         except ClientError:
             return False
 
+    def delete_all(self) -> int:
+        """
+        Delete all objects in the bucket.
+
+        Returns:
+            Number of objects deleted
+        """
+        deleted_count = 0
+        try:
+            paginator = self.client.get_paginator("list_objects_v2")
+            for page in paginator.paginate(Bucket=self.bucket):
+                objects = page.get("Contents", [])
+                if not objects:
+                    continue
+
+                # Delete objects in batches of 1000 (S3 limit)
+                delete_keys = [{"Key": obj["Key"]} for obj in objects]
+                if delete_keys:
+                    self.client.delete_objects(
+                        Bucket=self.bucket, Delete={"Objects": delete_keys}
+                    )
+                    deleted_count += len(delete_keys)
+                    logger.info(f"Deleted {len(delete_keys)} objects from S3")
+
+            logger.info(f"Total objects deleted from S3: {deleted_count}")
+            return deleted_count
+        except ClientError as e:
+            logger.error(f"Failed to delete all S3 objects: {e}")
+            raise
+
     def generate_presigned_url(
         self,
         s3_key: str,
@@ -848,6 +924,95 @@ class S3Storage:
             logger.error(f"Unexpected error during storage health check: {e}")
             return False
 
+    def get_verified(self, s3_key: str, expected_hash: str) -> bytes:
+        """
+        Download and verify content matches expected SHA256 hash.
+
+        This method downloads the entire content, computes its hash, and
+        verifies it matches the expected hash before returning.
+
+        Args:
+            s3_key: The S3 storage key of the file
+            expected_hash: Expected SHA256 hash (64 hex characters)
+
+        Returns:
+            File content as bytes (only if verification passes)
+
+        Raises:
+            ChecksumMismatchError: If computed hash doesn't match expected
+            ClientError: If S3 operation fails
+        """
+        if not is_valid_sha256(expected_hash):
+            raise ValueError(f"Invalid SHA256 hash format: {expected_hash}")
+
+        content = self.get(s3_key)
+        actual_hash = compute_sha256(content)
+
+        if actual_hash != expected_hash.lower():
+            raise ChecksumMismatchError(
+                expected=expected_hash.lower(),
+                actual=actual_hash,
+                s3_key=s3_key,
+                size=len(content),
+            )
+
+        logger.debug(f"Verification passed for {s3_key}: {actual_hash[:16]}...")
+        return content
+
+    def get_stream_verified(
+        self,
+        s3_key: str,
+        expected_hash: str,
+        range_header: Optional[str] = None,
+    ) -> Tuple[VerifyingStreamWrapper, int, Optional[str]]:
+        """
+        Get a verifying stream wrapper for an object.
+
+        Returns a wrapper that computes the hash as chunks are read and
+        can verify after streaming completes. Note that verification happens
+        AFTER content has been streamed to the client.
+
+        IMPORTANT: For range requests, verification is not supported because
+        we cannot verify a partial download against the full file hash.
+
+        Args:
+            s3_key: The S3 storage key of the file
+            expected_hash: Expected SHA256 hash (64 hex characters)
+            range_header: Optional HTTP Range header (verification disabled if set)
+
+        Returns:
+            Tuple of (VerifyingStreamWrapper, content_length, content_range)
+            The wrapper has a verify() method to call after streaming.
+
+        Raises:
+            ValueError: If expected_hash is invalid format
+            ClientError: If S3 operation fails
+        """
+        if not is_valid_sha256(expected_hash):
+            raise ValueError(f"Invalid SHA256 hash format: {expected_hash}")
+
+        # Get the S3 stream
+        stream, content_length, content_range = self.get_stream(s3_key, range_header)
+
+        # For range requests, we cannot verify (partial content)
+        # Return a HashingStreamWrapper that just tracks bytes without verification
+        if range_header or content_range:
+            logger.debug(
+                f"Range request for {s3_key} - verification disabled (partial content)"
+            )
+            # Return a basic hashing wrapper (caller should not verify)
+            hashing_wrapper = HashingStreamWrapper(stream)
+            return hashing_wrapper, content_length, content_range
+
+        # Create verifying wrapper
+        verifying_wrapper = VerifyingStreamWrapper(
+            stream=stream,
+            expected_hash=expected_hash,
+            s3_key=s3_key,
+        )
+
+        return verifying_wrapper, content_length, content_range
+
     def verify_integrity(self, s3_key: str, expected_sha256: str) -> bool:
         """
         Verify the integrity of a stored object by downloading and re-hashing.

backend/pytest.ini

@@ -12,6 +12,8 @@ markers =
     unit: Unit tests (no external dependencies)
     integration: Integration tests (require database/storage)
     slow: Slow tests (skip with -m "not slow")
+    large: Large file tests (100MB+, skip with -m "not large")
+    concurrent: Concurrent operation tests
 
 # Coverage configuration
 [coverage:run]

backend/requirements.txt

@@ -9,6 +9,8 @@ pydantic==2.5.3
 pydantic-settings==2.1.0
 python-jose[cryptography]==3.3.0
 passlib[bcrypt]==1.7.4
+bcrypt==4.0.1
+slowapi==0.1.9
 
 # Test dependencies
 pytest>=7.4.0

backend/tests/conftest.py

@@ -4,15 +4,45 @@ Test configuration and fixtures for Orchard backend tests.
 This module provides:
 - Database fixtures with test isolation
 - Mock S3 storage using moto
-- Test data factories for common scenarios
+- Shared pytest fixtures
 """
 
 import os
 import pytest
-import hashlib
-from typing import Generator, BinaryIO
-from unittest.mock import MagicMock, patch
+
+
+# =============================================================================
+# Pytest Markers
+# =============================================================================
+
+
+def pytest_configure(config):
+    """Register custom pytest markers."""
+    config.addinivalue_line(
+        "markers",
+        "auth_intensive: marks tests that make many login requests (excluded from CI integration tests due to rate limiting)",
+    )
+    config.addinivalue_line(
+        "markers",
+        "integration: marks tests as integration tests",
+    )
+    config.addinivalue_line(
+        "markers",
+        "large: marks tests that handle large files (slow)",
+    )
+    config.addinivalue_line(
+        "markers",
+        "slow: marks tests as slow running",
+    )
+    config.addinivalue_line(
+        "markers",
+        "requires_direct_s3: marks tests that require direct S3/MinIO access (skipped in CI where S3 is not directly accessible)",
+    )
+
+
 import io
+from typing import Generator
+from unittest.mock import MagicMock
 
 # Set test environment defaults before importing app modules
 # Use setdefault to NOT override existing env vars (from docker-compose)
@@ -26,54 +56,29 @@ os.environ.setdefault("ORCHARD_S3_BUCKET", "test-bucket")
 os.environ.setdefault("ORCHARD_S3_ACCESS_KEY_ID", "test")
 os.environ.setdefault("ORCHARD_S3_SECRET_ACCESS_KEY", "test")
 
-
-# =============================================================================
-# Test Data Factories
-# =============================================================================
-
-
-def create_test_file(content: bytes = None, size: int = 1024) -> io.BytesIO:
-    """
-    Create a test file with known content.
-
-    Args:
-        content: Specific content to use, or None to generate random-ish content
-        size: Size of generated content if content is None
-
-    Returns:
-        BytesIO object with the content
-    """
-    if content is None:
-        content = os.urandom(size)
-    return io.BytesIO(content)
-
-
-def compute_sha256(content: bytes) -> str:
-    """Compute SHA256 hash of content as lowercase hex string."""
-    return hashlib.sha256(content).hexdigest()
-
-
-def compute_md5(content: bytes) -> str:
-    """Compute MD5 hash of content as lowercase hex string."""
-    return hashlib.md5(content).hexdigest()
-
-
-def compute_sha1(content: bytes) -> str:
-    """Compute SHA1 hash of content as lowercase hex string."""
-    return hashlib.sha1(content).hexdigest()
-
-
-# Known test data with pre-computed hashes
-TEST_CONTENT_HELLO = b"Hello, World!"
-TEST_HASH_HELLO = "dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986f"
-TEST_MD5_HELLO = "65a8e27d8879283831b664bd8b7f0ad4"
-TEST_SHA1_HELLO = "0a0a9f2a6772942557ab5355d76af442f8f65e01"
-
-TEST_CONTENT_EMPTY = b""
-# Note: Empty content should be rejected by the storage layer
-
-TEST_CONTENT_BINARY = bytes(range(256))
-TEST_HASH_BINARY = compute_sha256(TEST_CONTENT_BINARY)
+# Re-export factory functions for backward compatibility
+from tests.factories import (
+    create_test_file,
+    compute_sha256,
+    compute_md5,
+    compute_sha1,
+    upload_test_file,
+    generate_content,
+    generate_content_with_hash,
+    TEST_CONTENT_HELLO,
+    TEST_HASH_HELLO,
+    TEST_MD5_HELLO,
+    TEST_SHA1_HELLO,
+    TEST_CONTENT_EMPTY,
+    TEST_CONTENT_BINARY,
+    TEST_HASH_BINARY,
+    get_s3_client,
+    get_s3_bucket,
+    list_s3_objects_by_hash,
+    count_s3_objects_by_prefix,
+    s3_object_exists,
+    delete_s3_object_by_hash,
+)
 
 
 # =============================================================================
@@ -207,19 +212,64 @@ def test_app():
 # =============================================================================
 
 
-@pytest.fixture
+@pytest.fixture(scope="session")
 def integration_client():
     """
-    Create a test client for integration tests.
+    Create an authenticated test client for integration tests.
 
-    Uses the real database and MinIO from docker-compose.local.yml.
+    Uses the real database and MinIO from docker-compose.local.yml or deployed environment.
+    Authenticates as admin for write operations. Session-scoped to reuse login across tests.
+
+    Environment variables:
+        ORCHARD_TEST_URL: Base URL of the Orchard server (default: http://localhost:8080)
+        ORCHARD_TEST_USERNAME: Admin username for authentication (default: admin)
+        ORCHARD_TEST_PASSWORD: Admin password for authentication (default: changeme123)
     """
-    from httpx import Client
+    import httpx
+
+    # Connect to the running orchard-server container or deployed environment
+    base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+    username = os.environ.get("ORCHARD_TEST_USERNAME", "admin")
+    password = os.environ.get("ORCHARD_TEST_PASSWORD", "changeme123")
+
+    with httpx.Client(base_url=base_url, timeout=30.0) as client:
+        # Login as admin to enable write operations
+        login_response = client.post(
+            "/api/v1/auth/login",
+            json={"username": username, "password": password},
+        )
+        if login_response.status_code != 200:
+            pytest.fail(
+                f"Authentication failed against {base_url}: {login_response.status_code} - {login_response.text}. "
+                f"Set ORCHARD_TEST_USERNAME and ORCHARD_TEST_PASSWORD environment variables if using non-default credentials."
+            )
+
+        # Verify cookie was set
+        if not client.cookies:
+            pytest.fail(
+                f"Login succeeded but no session cookie was set. Response headers: {login_response.headers}"
+            )
+
+        yield client
+
+
+@pytest.fixture
+def auth_client():
+    """
+    Create a function-scoped test client for authentication tests.
+
+    Unlike integration_client (session-scoped), this creates a fresh client
+    for each test. Use this for tests that manipulate authentication state
+    (login, logout, cookie clearing) to avoid polluting other tests.
+
+    Environment variables:
+        ORCHARD_TEST_URL: Base URL of the Orchard server (default: http://localhost:8080)
+    """
+    import httpx
 
-    # Connect to the running orchard-server container
     base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
 
-    with Client(base_url=base_url, timeout=30.0) as client:
+    with httpx.Client(base_url=base_url, timeout=30.0) as client:
         yield client
 
 
@@ -291,124 +341,39 @@ def test_content():
     return (content, sha256)
 
 
-def upload_test_file(
-    client,
-    project: str,
-    package: str,
-    content: bytes,
-    filename: str = "test.bin",
-    tag: str = None,
-) -> dict:
+@pytest.fixture
+def sized_content():
     """
-    Helper function to upload a test file.
+    Factory fixture for generating content of specific sizes.
 
-    Returns the upload response as a dict.
+    Usage:
+        def test_example(sized_content):
+            content, hash = sized_content(1024)  # 1KB
+            content, hash = sized_content(1024 * 1024)  # 1MB
     """
-    files = {"file": (filename, io.BytesIO(content), "application/octet-stream")}
-    data = {}
-    if tag:
-        data["tag"] = tag
-
-    response = client.post(
-        f"/api/v1/project/{project}/{package}/upload",
-        files=files,
-        data=data if data else None,
-    )
-    assert response.status_code == 200, f"Upload failed: {response.text}"
-    return response.json()
+    def _generate(size: int, seed: int = None):
+        return generate_content_with_hash(size, seed)
+    return _generate
 
 
 # =============================================================================
-# S3 Direct Access Helpers (for integration tests)
+# Size Constants for Tests
 # =============================================================================
 
+# Common file sizes for boundary testing
+SIZE_1B = 1
+SIZE_1KB = 1024
+SIZE_10KB = 10 * 1024
+SIZE_100KB = 100 * 1024
+SIZE_1MB = 1024 * 1024
+SIZE_5MB = 5 * 1024 * 1024
+SIZE_10MB = 10 * 1024 * 1024
+SIZE_50MB = 50 * 1024 * 1024
+SIZE_100MB = 100 * 1024 * 1024
+SIZE_250MB = 250 * 1024 * 1024
+SIZE_500MB = 500 * 1024 * 1024
+SIZE_1GB = 1024 * 1024 * 1024
 
-def get_s3_client():
-    """
-    Create a boto3 S3 client for direct S3 access in integration tests.
-
-    Uses environment variables for configuration (same as the app).
-    Note: When running in container, S3 endpoint should be 'minio:9000' not 'localhost:9000'.
-    """
-    import boto3
-    from botocore.config import Config
-
-    config = Config(s3={"addressing_style": "path"})
-
-    # Use the same endpoint as the app (minio:9000 in container, localhost:9000 locally)
-    endpoint = os.environ.get("ORCHARD_S3_ENDPOINT", "http://minio:9000")
-
-    return boto3.client(
-        "s3",
-        endpoint_url=endpoint,
-        region_name=os.environ.get("ORCHARD_S3_REGION", "us-east-1"),
-        aws_access_key_id=os.environ.get("ORCHARD_S3_ACCESS_KEY_ID", "minioadmin"),
-        aws_secret_access_key=os.environ.get(
-            "ORCHARD_S3_SECRET_ACCESS_KEY", "minioadmin"
-        ),
-        config=config,
-    )
-
-
-def get_s3_bucket():
-    """Get the S3 bucket name from environment."""
-    return os.environ.get("ORCHARD_S3_BUCKET", "orchard-artifacts")
-
-
-def list_s3_objects_by_hash(sha256_hash: str) -> list:
-    """
-    List S3 objects that match a specific SHA256 hash.
-
-    Uses the fruits/{hash[:2]}/{hash[2:4]}/{hash} key pattern.
-    Returns list of matching object keys.
-    """
-    client = get_s3_client()
-    bucket = get_s3_bucket()
-    prefix = f"fruits/{sha256_hash[:2]}/{sha256_hash[2:4]}/{sha256_hash}"
-
-    response = client.list_objects_v2(Bucket=bucket, Prefix=prefix)
-
-    if "Contents" not in response:
-        return []
-
-    return [obj["Key"] for obj in response["Contents"]]
-
-
-def count_s3_objects_by_prefix(prefix: str) -> int:
-    """
-    Count S3 objects with a given prefix.
-
-    Useful for checking if duplicate uploads created multiple objects.
-    """
-    client = get_s3_client()
-    bucket = get_s3_bucket()
-
-    response = client.list_objects_v2(Bucket=bucket, Prefix=prefix)
-
-    if "Contents" not in response:
-        return 0
-
-    return len(response["Contents"])
-
-
-def s3_object_exists(sha256_hash: str) -> bool:
-    """
-    Check if an S3 object exists for a given SHA256 hash.
-    """
-    objects = list_s3_objects_by_hash(sha256_hash)
-    return len(objects) > 0
-
-
-def delete_s3_object_by_hash(sha256_hash: str) -> bool:
-    """
-    Delete an S3 object by its SHA256 hash (for test cleanup).
-    """
-    client = get_s3_client()
-    bucket = get_s3_bucket()
-    s3_key = f"fruits/{sha256_hash[:2]}/{sha256_hash[2:4]}/{sha256_hash}"
-
-    try:
-        client.delete_object(Bucket=bucket, Key=s3_key)
-        return True
-    except Exception:
-        return False
+# Chunk size boundaries (based on typical S3 multipart chunk sizes)
+CHUNK_SIZE = 64 * 1024  # 64KB typical chunk
+MULTIPART_THRESHOLD = 100 * 1024 * 1024  # 100MB multipart threshold

backend/tests/factories.py

@@ -0,0 +1,327 @@
+"""
+Test data factories for Orchard backend tests.
+
+This module provides factory functions for creating test data,
+including test files, pre-computed hashes, and helper utilities.
+"""
+
+import hashlib
+import io
+import os
+import uuid
+from typing import Optional
+
+
+# =============================================================================
+# Hash Computation Utilities
+# =============================================================================
+
+
+def compute_sha256(content: bytes) -> str:
+    """Compute SHA256 hash of content as lowercase hex string."""
+    return hashlib.sha256(content).hexdigest()
+
+
+def compute_md5(content: bytes) -> str:
+    """Compute MD5 hash of content as lowercase hex string."""
+    return hashlib.md5(content).hexdigest()
+
+
+def compute_sha1(content: bytes) -> str:
+    """Compute SHA1 hash of content as lowercase hex string."""
+    return hashlib.sha1(content).hexdigest()
+
+
+# =============================================================================
+# Test File Factories
+# =============================================================================
+
+
+def create_test_file(content: Optional[bytes] = None, size: int = 1024) -> io.BytesIO:
+    """
+    Create a test file with known content.
+
+    Args:
+        content: Specific content to use, or None to generate random-ish content
+        size: Size of generated content if content is None
+
+    Returns:
+        BytesIO object with the content
+    """
+    if content is None:
+        content = os.urandom(size)
+    return io.BytesIO(content)
+
+
+def create_unique_content(prefix: str = "test-content") -> tuple[bytes, str]:
+    """
+    Create unique test content with its SHA256 hash.
+
+    Args:
+        prefix: Prefix for the content string
+
+    Returns:
+        Tuple of (content_bytes, sha256_hash)
+    """
+    content = f"{prefix}-{uuid.uuid4().hex}".encode()
+    sha256 = compute_sha256(content)
+    return content, sha256
+
+
+# =============================================================================
+# Known Test Data (Pre-computed hashes for deterministic tests)
+# =============================================================================
+
+
+TEST_CONTENT_HELLO = b"Hello, World!"
+TEST_HASH_HELLO = "dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986f"
+TEST_MD5_HELLO = "65a8e27d8879283831b664bd8b7f0ad4"
+TEST_SHA1_HELLO = "0a0a9f2a6772942557ab5355d76af442f8f65e01"
+
+TEST_CONTENT_EMPTY = b""
+# Note: Empty content should be rejected by the storage layer
+
+TEST_CONTENT_BINARY = bytes(range(256))
+TEST_HASH_BINARY = compute_sha256(TEST_CONTENT_BINARY)
+
+
+# =============================================================================
+# API Test Helpers
+# =============================================================================
+
+
+def upload_test_file(
+    client,
+    project: str,
+    package: str,
+    content: bytes,
+    filename: str = "test.bin",
+    tag: Optional[str] = None,
+    version: Optional[str] = None,
+) -> dict:
+    """
+    Helper function to upload a test file via the API.
+
+    Args:
+        client: HTTP client (httpx or TestClient)
+        project: Project name
+        package: Package name
+        content: File content as bytes
+        filename: Original filename
+        tag: Optional tag to assign
+        version: Optional version to assign
+
+    Returns:
+        The upload response as a dict
+    """
+    files = {"file": (filename, io.BytesIO(content), "application/octet-stream")}
+    data = {}
+    if tag:
+        data["tag"] = tag
+    if version:
+        data["version"] = version
+
+    response = client.post(
+        f"/api/v1/project/{project}/{package}/upload",
+        files=files,
+        data=data if data else None,
+    )
+    assert response.status_code == 200, f"Upload failed: {response.text}"
+    return response.json()
+
+
+def generate_content(size: int, seed: Optional[int] = None) -> bytes:
+    """
+    Generate deterministic or random content of a specified size.
+
+    Args:
+        size: Size of content in bytes
+        seed: Optional seed for reproducible content (None for random)
+
+    Returns:
+        Bytes of the specified size
+    """
+    if size == 0:
+        return b""
+    if seed is not None:
+        import random
+        rng = random.Random(seed)
+        return bytes(rng.randint(0, 255) for _ in range(size))
+    return os.urandom(size)
+
+
+def generate_content_with_hash(size: int, seed: Optional[int] = None) -> tuple[bytes, str]:
+    """
+    Generate content of specified size and compute its SHA256 hash.
+
+    Args:
+        size: Size of content in bytes
+        seed: Optional seed for reproducible content
+
+    Returns:
+        Tuple of (content_bytes, sha256_hash)
+    """
+    content = generate_content(size, seed)
+    return content, compute_sha256(content)
+
+
+# =============================================================================
+# Project/Package Factories
+# =============================================================================
+
+
+def create_test_project(client, unique_id: Optional[str] = None) -> str:
+    """
+    Create a test project via the API.
+
+    Args:
+        client: HTTP client
+        unique_id: Unique identifier for the project name
+
+    Returns:
+        Project name
+    """
+    if unique_id is None:
+        unique_id = uuid.uuid4().hex[:8]
+
+    project_name = f"test-project-{unique_id}"
+    response = client.post(
+        "/api/v1/projects",
+        json={"name": project_name, "description": "Test project", "is_public": True},
+    )
+    assert response.status_code == 200, f"Failed to create project: {response.text}"
+    return project_name
+
+
+def create_test_package(client, project: str, unique_id: Optional[str] = None) -> str:
+    """
+    Create a test package via the API.
+
+    Args:
+        client: HTTP client
+        project: Project name
+        unique_id: Unique identifier for the package name
+
+    Returns:
+        Package name
+    """
+    if unique_id is None:
+        unique_id = uuid.uuid4().hex[:8]
+
+    package_name = f"test-package-{unique_id}"
+    response = client.post(
+        f"/api/v1/project/{project}/packages",
+        json={"name": package_name, "description": "Test package"},
+    )
+    assert response.status_code == 200, f"Failed to create package: {response.text}"
+    return package_name
+
+
+def delete_test_project(client, project: str) -> None:
+    """
+    Delete a test project (cleanup helper).
+
+    Args:
+        client: HTTP client
+        project: Project name to delete
+    """
+    try:
+        client.delete(f"/api/v1/projects/{project}")
+    except Exception:
+        pass  # Ignore cleanup errors
+
+
+# =============================================================================
+# S3 Test Helpers
+# =============================================================================
+
+
+def get_s3_client():
+    """
+    Create a boto3 S3 client for direct S3 access in integration tests.
+
+    Uses environment variables for configuration (same as the app).
+    Note: When running in container, S3 endpoint should be 'minio:9000' not 'localhost:9000'.
+    """
+    import boto3
+    from botocore.config import Config
+
+    config = Config(s3={"addressing_style": "path"})
+
+    # Use the same endpoint as the app (minio:9000 in container, localhost:9000 locally)
+    endpoint = os.environ.get("ORCHARD_S3_ENDPOINT", "http://minio:9000")
+
+    return boto3.client(
+        "s3",
+        endpoint_url=endpoint,
+        region_name=os.environ.get("ORCHARD_S3_REGION", "us-east-1"),
+        aws_access_key_id=os.environ.get("ORCHARD_S3_ACCESS_KEY_ID", "minioadmin"),
+        aws_secret_access_key=os.environ.get(
+            "ORCHARD_S3_SECRET_ACCESS_KEY", "minioadmin"
+        ),
+        config=config,
+    )
+
+
+def get_s3_bucket() -> str:
+    """Get the S3 bucket name from environment."""
+    return os.environ.get("ORCHARD_S3_BUCKET", "orchard-artifacts")
+
+
+def list_s3_objects_by_hash(sha256_hash: str) -> list:
+    """
+    List S3 objects that match a specific SHA256 hash.
+
+    Uses the fruits/{hash[:2]}/{hash[2:4]}/{hash} key pattern.
+    Returns list of matching object keys.
+    """
+    client = get_s3_client()
+    bucket = get_s3_bucket()
+    prefix = f"fruits/{sha256_hash[:2]}/{sha256_hash[2:4]}/{sha256_hash}"
+
+    response = client.list_objects_v2(Bucket=bucket, Prefix=prefix)
+
+    if "Contents" not in response:
+        return []
+
+    return [obj["Key"] for obj in response["Contents"]]
+
+
+def count_s3_objects_by_prefix(prefix: str) -> int:
+    """
+    Count S3 objects with a given prefix.
+
+    Useful for checking if duplicate uploads created multiple objects.
+    """
+    client = get_s3_client()
+    bucket = get_s3_bucket()
+
+    response = client.list_objects_v2(Bucket=bucket, Prefix=prefix)
+
+    if "Contents" not in response:
+        return 0
+
+    return len(response["Contents"])
+
+
+def s3_object_exists(sha256_hash: str) -> bool:
+    """
+    Check if an S3 object exists for a given SHA256 hash.
+    """
+    objects = list_s3_objects_by_hash(sha256_hash)
+    return len(objects) > 0
+
+
+def delete_s3_object_by_hash(sha256_hash: str) -> bool:
+    """
+    Delete an S3 object by its SHA256 hash (for test cleanup).
+    """
+    client = get_s3_client()
+    bucket = get_s3_bucket()
+    s3_key = f"fruits/{sha256_hash[:2]}/{sha256_hash[2:4]}/{sha256_hash}"
+
+    try:
+        client.delete_object(Bucket=bucket, Key=s3_key)
+        return True
+    except Exception:
+        return False

backend/tests/integration/test_artifacts_api.py

@@ -0,0 +1,638 @@
+"""
+Integration tests for artifact API endpoints.
+
+Tests cover:
+- Artifact retrieval by ID
+- Artifact stats endpoint
+- Artifact provenance/history
+- Artifact uploads listing
+- Garbage collection endpoints
+- Orphaned artifacts management
+"""
+
+import pytest
+from tests.factories import compute_sha256, upload_test_file
+
+
+class TestArtifactRetrieval:
+    """Tests for artifact retrieval endpoints."""
+
+    @pytest.mark.integration
+    def test_get_artifact_by_id(self, integration_client, test_package):
+        """Test retrieving an artifact by its SHA256 ID."""
+        project_name, package_name = test_package
+        content = b"artifact retrieval test"
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(
+            integration_client, project_name, package_name, content, tag="v1"
+        )
+
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert data["id"] == expected_hash
+        assert data["sha256"] == expected_hash
+        assert data["size"] == len(content)
+        assert "ref_count" in data
+        assert "created_at" in data
+
+    @pytest.mark.integration
+    def test_get_nonexistent_artifact(self, integration_client):
+        """Test getting a non-existent artifact returns 404."""
+        fake_hash = "a" * 64
+        response = integration_client.get(f"/api/v1/artifact/{fake_hash}")
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_artifact_includes_tags(self, integration_client, test_package):
+        """Test artifact response includes tags pointing to it."""
+        project_name, package_name = test_package
+        content = b"artifact with tags test"
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(
+            integration_client, project_name, package_name, content, tag="tagged-v1"
+        )
+
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "tags" in data
+        assert len(data["tags"]) >= 1
+
+        tag = data["tags"][0]
+        assert "name" in tag
+        assert "package_name" in tag
+        assert "project_name" in tag
+
+
+class TestArtifactStats:
+    """Tests for artifact statistics endpoint."""
+
+    @pytest.mark.integration
+    def test_artifact_stats_returns_valid_response(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test artifact stats returns expected fields."""
+        project, package = test_package
+        content = f"artifact stats test {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(
+            integration_client, project, package, content, tag=f"art-{unique_test_id}"
+        )
+
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}/stats")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "artifact_id" in data
+        assert "sha256" in data
+        assert "size" in data
+        assert "ref_count" in data
+        assert "storage_savings" in data
+        assert "tags" in data
+        assert "projects" in data
+        assert "packages" in data
+
+    @pytest.mark.integration
+    def test_artifact_stats_not_found(self, integration_client):
+        """Test artifact stats returns 404 for non-existent artifact."""
+        fake_hash = "0" * 64
+        response = integration_client.get(f"/api/v1/artifact/{fake_hash}/stats")
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_artifact_stats_shows_correct_projects(
+        self, integration_client, unique_test_id
+    ):
+        """Test artifact stats shows all projects using the artifact."""
+        content = f"multi-project artifact {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        proj1 = f"art-stats-a-{unique_test_id}"
+        proj2 = f"art-stats-b-{unique_test_id}"
+
+        try:
+            # Create projects and packages
+            integration_client.post(
+                "/api/v1/projects",
+                json={"name": proj1, "description": "Test", "is_public": True},
+            )
+            integration_client.post(
+                "/api/v1/projects",
+                json={"name": proj2, "description": "Test", "is_public": True},
+            )
+            integration_client.post(
+                f"/api/v1/project/{proj1}/packages",
+                json={"name": "pkg", "description": "Test"},
+            )
+            integration_client.post(
+                f"/api/v1/project/{proj2}/packages",
+                json={"name": "pkg", "description": "Test"},
+            )
+
+            # Upload same content to both projects
+            upload_test_file(integration_client, proj1, "pkg", content, tag="v1")
+            upload_test_file(integration_client, proj2, "pkg", content, tag="v1")
+
+            # Check artifact stats
+            response = integration_client.get(f"/api/v1/artifact/{expected_hash}/stats")
+            assert response.status_code == 200
+
+            data = response.json()
+            assert len(data["projects"]) == 2
+            assert proj1 in data["projects"]
+            assert proj2 in data["projects"]
+
+        finally:
+            integration_client.delete(f"/api/v1/projects/{proj1}")
+            integration_client.delete(f"/api/v1/projects/{proj2}")
+
+
+class TestArtifactProvenance:
+    """Tests for artifact provenance/history endpoint."""
+
+    @pytest.mark.integration
+    def test_artifact_history_returns_200(self, integration_client, test_package):
+        """Test artifact history endpoint returns 200."""
+        project_name, package_name = test_package
+
+        upload_result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"provenance test content",
+            "prov.txt",
+        )
+        artifact_id = upload_result["artifact_id"]
+
+        response = integration_client.get(f"/api/v1/artifact/{artifact_id}/history")
+        assert response.status_code == 200
+
+    @pytest.mark.integration
+    def test_artifact_history_has_required_fields(
+        self, integration_client, test_package
+    ):
+        """Test artifact history has all required fields."""
+        project_name, package_name = test_package
+
+        upload_result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"provenance fields test",
+            "fields.txt",
+        )
+        artifact_id = upload_result["artifact_id"]
+
+        response = integration_client.get(f"/api/v1/artifact/{artifact_id}/history")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "artifact_id" in data
+        assert "sha256" in data
+        assert "size" in data
+        assert "created_at" in data
+        assert "created_by" in data
+        assert "ref_count" in data
+        assert "first_uploaded_at" in data
+        assert "first_uploaded_by" in data
+        assert "upload_count" in data
+        assert "packages" in data
+        assert "tags" in data
+        assert "uploads" in data
+
+    @pytest.mark.integration
+    def test_artifact_history_not_found(self, integration_client):
+        """Test non-existent artifact returns 404."""
+        fake_hash = "b" * 64
+        response = integration_client.get(f"/api/v1/artifact/{fake_hash}/history")
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_artifact_history_with_tag(self, integration_client, test_package):
+        """Test artifact history includes tag information when tagged."""
+        project_name, package_name = test_package
+
+        upload_result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"tagged provenance test",
+            "tagged.txt",
+            tag="v1.0.0",
+        )
+        artifact_id = upload_result["artifact_id"]
+
+        response = integration_client.get(f"/api/v1/artifact/{artifact_id}/history")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert len(data["tags"]) >= 1
+
+        tag = data["tags"][0]
+        assert "project_name" in tag
+        assert "package_name" in tag
+        assert "tag_name" in tag
+
+
+class TestArtifactUploads:
+    """Tests for artifact uploads listing endpoint."""
+
+    @pytest.mark.integration
+    def test_artifact_uploads_returns_200(self, integration_client, test_package):
+        """Test artifact uploads endpoint returns 200."""
+        project_name, package_name = test_package
+
+        upload_result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"artifact upload test",
+            "artifact.txt",
+        )
+        artifact_id = upload_result["artifact_id"]
+
+        response = integration_client.get(f"/api/v1/artifact/{artifact_id}/uploads")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "items" in data
+        assert "pagination" in data
+        assert len(data["items"]) >= 1
+
+    @pytest.mark.integration
+    def test_artifact_uploads_not_found(self, integration_client):
+        """Test non-existent artifact returns 404."""
+        fake_hash = "a" * 64
+        response = integration_client.get(f"/api/v1/artifact/{fake_hash}/uploads")
+        assert response.status_code == 404
+
+
+class TestOrphanedArtifacts:
+    """Tests for orphaned artifacts management."""
+
+    @pytest.mark.integration
+    def test_list_orphaned_artifacts_returns_list(self, integration_client):
+        """Test orphaned artifacts endpoint returns a list."""
+        response = integration_client.get("/api/v1/admin/orphaned-artifacts")
+        assert response.status_code == 200
+        assert isinstance(response.json(), list)
+
+    @pytest.mark.integration
+    def test_orphaned_artifact_has_required_fields(self, integration_client):
+        """Test orphaned artifact response has required fields."""
+        response = integration_client.get("/api/v1/admin/orphaned-artifacts?limit=1")
+        assert response.status_code == 200
+
+        data = response.json()
+        if len(data) > 0:
+            artifact = data[0]
+            assert "id" in artifact
+            assert "size" in artifact
+            assert "created_at" in artifact
+            assert "created_by" in artifact
+            assert "original_name" in artifact
+
+    @pytest.mark.integration
+    def test_orphaned_artifacts_respects_limit(self, integration_client):
+        """Test orphaned artifacts endpoint respects limit parameter."""
+        response = integration_client.get("/api/v1/admin/orphaned-artifacts?limit=5")
+        assert response.status_code == 200
+        assert len(response.json()) <= 5
+
+    @pytest.mark.integration
+    def test_artifact_becomes_orphaned_when_tag_deleted(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test artifact appears in orphaned list after tag is deleted."""
+        project, package = test_package
+        content = f"orphan test {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        # Upload with tag
+        upload_test_file(integration_client, project, package, content, tag="temp-tag")
+
+        # Verify not in orphaned list
+        response = integration_client.get("/api/v1/admin/orphaned-artifacts?limit=1000")
+        orphaned_ids = [a["id"] for a in response.json()]
+        assert expected_hash not in orphaned_ids
+
+        # Delete the tag
+        integration_client.delete(f"/api/v1/project/{project}/{package}/tags/temp-tag")
+
+        # Verify now in orphaned list
+        response = integration_client.get("/api/v1/admin/orphaned-artifacts?limit=1000")
+        orphaned_ids = [a["id"] for a in response.json()]
+        assert expected_hash in orphaned_ids
+
+
+class TestGarbageCollection:
+    """Tests for garbage collection endpoint."""
+
+    @pytest.mark.integration
+    def test_garbage_collect_dry_run_returns_response(self, integration_client):
+        """Test garbage collection dry run returns valid response."""
+        response = integration_client.post("/api/v1/admin/garbage-collect?dry_run=true")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "artifacts_deleted" in data
+        assert "bytes_freed" in data
+        assert "artifact_ids" in data
+        assert "dry_run" in data
+        assert data["dry_run"] is True
+
+    @pytest.mark.integration
+    def test_garbage_collect_dry_run_doesnt_delete(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test garbage collection dry run doesn't actually delete artifacts."""
+        project, package = test_package
+        content = f"dry run test {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        # Upload and delete tag to create orphan
+        upload_test_file(integration_client, project, package, content, tag="dry-run")
+        integration_client.delete(f"/api/v1/project/{project}/{package}/tags/dry-run")
+
+        # Verify artifact exists
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.status_code == 200
+
+        # Run garbage collection in dry-run mode
+        gc_response = integration_client.post(
+            "/api/v1/admin/garbage-collect?dry_run=true&limit=1000"
+        )
+        assert gc_response.status_code == 200
+        assert expected_hash in gc_response.json()["artifact_ids"]
+
+        # Verify artifact STILL exists
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.status_code == 200
+
+    @pytest.mark.integration
+    def test_garbage_collect_preserves_referenced_artifacts(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test garbage collection doesn't delete artifacts with ref_count > 0."""
+        project, package = test_package
+        content = f"preserve test {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        # Upload with tag (ref_count=1)
+        upload_test_file(integration_client, project, package, content, tag="keep-this")
+
+        # Verify artifact exists with ref_count=1
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.status_code == 200
+        assert response.json()["ref_count"] == 1
+
+        # Run garbage collection (dry_run to not affect other tests)
+        gc_response = integration_client.post(
+            "/api/v1/admin/garbage-collect?dry_run=true&limit=1000"
+        )
+        assert gc_response.status_code == 200
+
+        # Verify artifact was NOT in delete list
+        assert expected_hash not in gc_response.json()["artifact_ids"]
+
+        # Verify artifact still exists
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.status_code == 200
+        assert response.json()["ref_count"] == 1
+
+    @pytest.mark.integration
+    def test_garbage_collect_respects_limit(self, integration_client):
+        """Test garbage collection respects limit parameter."""
+        response = integration_client.post(
+            "/api/v1/admin/garbage-collect?dry_run=true&limit=5"
+        )
+        assert response.status_code == 200
+        assert response.json()["artifacts_deleted"] <= 5
+
+    @pytest.mark.integration
+    def test_garbage_collect_returns_bytes_freed(self, integration_client):
+        """Test garbage collection returns accurate bytes_freed."""
+        response = integration_client.post("/api/v1/admin/garbage-collect?dry_run=true")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert data["bytes_freed"] >= 0
+        assert isinstance(data["bytes_freed"], int)
+
+
+class TestGlobalUploads:
+    """Tests for global uploads endpoint."""
+
+    @pytest.mark.integration
+    def test_global_uploads_returns_200(self, integration_client):
+        """Test global uploads endpoint returns 200."""
+        response = integration_client.get("/api/v1/uploads")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "items" in data
+        assert "pagination" in data
+
+    @pytest.mark.integration
+    def test_global_uploads_pagination(self, integration_client):
+        """Test global uploads endpoint respects pagination."""
+        response = integration_client.get("/api/v1/uploads?limit=5&page=1")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert len(data["items"]) <= 5
+        assert data["pagination"]["limit"] == 5
+        assert data["pagination"]["page"] == 1
+
+    @pytest.mark.integration
+    def test_global_uploads_filter_by_project(self, integration_client, test_package):
+        """Test filtering global uploads by project name."""
+        project_name, package_name = test_package
+
+        # Upload a file
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"global filter test",
+            "global.txt",
+        )
+
+        response = integration_client.get(f"/api/v1/uploads?project={project_name}")
+        assert response.status_code == 200
+
+        data = response.json()
+        for item in data["items"]:
+            assert item["project_name"] == project_name
+
+    @pytest.mark.integration
+    def test_global_uploads_has_more_field(self, integration_client):
+        """Test pagination includes has_more field."""
+        response = integration_client.get("/api/v1/uploads?limit=1")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "has_more" in data["pagination"]
+        assert isinstance(data["pagination"]["has_more"], bool)
+
+
+class TestGlobalArtifacts:
+    """Tests for global artifacts endpoint."""
+
+    @pytest.mark.integration
+    def test_global_artifacts_returns_200(self, integration_client):
+        """Test global artifacts endpoint returns 200."""
+        response = integration_client.get("/api/v1/artifacts")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "items" in data
+        assert "pagination" in data
+
+    @pytest.mark.integration
+    def test_global_artifacts_pagination(self, integration_client):
+        """Test global artifacts endpoint respects pagination."""
+        response = integration_client.get("/api/v1/artifacts?limit=5&page=1")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert len(data["items"]) <= 5
+        assert data["pagination"]["limit"] == 5
+
+    @pytest.mark.integration
+    def test_global_artifacts_filter_by_size(self, integration_client):
+        """Test filtering global artifacts by size range."""
+        response = integration_client.get(
+            "/api/v1/artifacts?min_size=1&max_size=1000000"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        for item in data["items"]:
+            assert 1 <= item["size"] <= 1000000
+
+    @pytest.mark.integration
+    def test_global_artifacts_sort_by_size(self, integration_client):
+        """Test sorting global artifacts by size."""
+        response = integration_client.get("/api/v1/artifacts?sort=size&order=desc")
+        assert response.status_code == 200
+        data = response.json()
+        if len(data["items"]) > 1:
+            sizes = [item["size"] for item in data["items"]]
+            assert sizes == sorted(sizes, reverse=True)
+
+    @pytest.mark.integration
+    def test_global_artifacts_invalid_sort_returns_400(self, integration_client):
+        """Test invalid sort field returns 400."""
+        response = integration_client.get("/api/v1/artifacts?sort=invalid_field")
+        assert response.status_code == 400
+
+
+class TestGlobalTags:
+    """Tests for global tags endpoint."""
+
+    @pytest.mark.integration
+    def test_global_tags_returns_200(self, integration_client):
+        """Test global tags endpoint returns 200."""
+        response = integration_client.get("/api/v1/tags")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "items" in data
+        assert "pagination" in data
+
+    @pytest.mark.integration
+    def test_global_tags_pagination(self, integration_client):
+        """Test global tags endpoint respects pagination."""
+        response = integration_client.get("/api/v1/tags?limit=5&page=1")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert len(data["items"]) <= 5
+        assert data["pagination"]["limit"] == 5
+
+    @pytest.mark.integration
+    def test_global_tags_has_project_context(self, integration_client):
+        """Test global tags response includes project/package context."""
+        response = integration_client.get("/api/v1/tags?limit=1")
+        assert response.status_code == 200
+
+        data = response.json()
+        if len(data["items"]) > 0:
+            item = data["items"][0]
+            assert "project_name" in item
+            assert "package_name" in item
+            assert "artifact_id" in item
+
+    @pytest.mark.integration
+    def test_global_tags_search_with_wildcard(self, integration_client):
+        """Test global tags search supports wildcards."""
+        response = integration_client.get("/api/v1/tags?search=v*")
+        assert response.status_code == 200
+        # Just verify it doesn't error; results may vary
+
+
+class TestAuditLogs:
+    """Tests for global audit logs endpoint."""
+
+    @pytest.mark.integration
+    def test_list_audit_logs_returns_valid_response(self, integration_client):
+        """Test audit logs endpoint returns valid paginated response."""
+        response = integration_client.get("/api/v1/audit-logs")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "items" in data
+        assert "pagination" in data
+        assert isinstance(data["items"], list)
+
+        pagination = data["pagination"]
+        assert "page" in pagination
+        assert "limit" in pagination
+        assert "total" in pagination
+        assert "total_pages" in pagination
+
+    @pytest.mark.integration
+    def test_audit_logs_respects_pagination(self, integration_client):
+        """Test audit logs endpoint respects limit parameter."""
+        response = integration_client.get("/api/v1/audit-logs?limit=5")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert len(data["items"]) <= 5
+        assert data["pagination"]["limit"] == 5
+
+    @pytest.mark.integration
+    def test_audit_logs_filter_by_action(self, integration_client, test_package):
+        """Test filtering audit logs by action type."""
+        project_name, package_name = test_package
+
+        response = integration_client.get("/api/v1/audit-logs?action=project.create")
+        assert response.status_code == 200
+
+        data = response.json()
+        for item in data["items"]:
+            assert item["action"] == "project.create"
+
+    @pytest.mark.integration
+    def test_audit_log_entry_has_required_fields(
+        self, integration_client, test_project
+    ):
+        """Test audit log entries have all required fields."""
+        response = integration_client.get("/api/v1/audit-logs?limit=10")
+        assert response.status_code == 200
+
+        data = response.json()
+        if data["items"]:
+            item = data["items"][0]
+            assert "id" in item
+            assert "action" in item
+            assert "resource" in item
+            assert "user_id" in item
+            assert "timestamp" in item

backend/tests/integration/test_auth_api.py

@@ -0,0 +1,615 @@
+"""Integration tests for authentication API endpoints.
+
+Note: These tests are marked as auth_intensive because they make many login
+requests. Dev/stage deployments have relaxed rate limits (1000/minute) to
+allow these tests to run. Production uses strict rate limits (5/minute).
+"""
+
+import pytest
+from uuid import uuid4
+
+
+# Mark all tests in this module as auth_intensive (informational, not excluded from CI)
+pytestmark = pytest.mark.auth_intensive
+
+
+class TestAuthLogin:
+    """Tests for login endpoint."""
+
+    @pytest.mark.integration
+    def test_login_success(self, auth_client):
+        """Test successful login with default admin credentials."""
+        response = auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+        assert response.status_code == 200
+        data = response.json()
+        assert data["username"] == "admin"
+        assert data["is_admin"] is True
+        assert "orchard_session" in response.cookies
+
+    @pytest.mark.integration
+    def test_login_invalid_password(self, auth_client):
+        """Test login with wrong password."""
+        response = auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "wrongpassword"},
+        )
+        assert response.status_code == 401
+        assert "Invalid username or password" in response.json()["detail"]
+
+    @pytest.mark.integration
+    def test_login_nonexistent_user(self, auth_client):
+        """Test login with non-existent user."""
+        response = auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "nonexistent", "password": "password"},
+        )
+        assert response.status_code == 401
+
+
+class TestAuthLogout:
+    """Tests for logout endpoint."""
+
+    @pytest.mark.integration
+    def test_logout_success(self, auth_client):
+        """Test successful logout."""
+        # First login
+        login_response = auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+        assert login_response.status_code == 200
+
+        # Then logout
+        logout_response = auth_client.post("/api/v1/auth/logout")
+        assert logout_response.status_code == 200
+        assert "Logged out successfully" in logout_response.json()["message"]
+
+    @pytest.mark.integration
+    def test_logout_without_session(self, auth_client):
+        """Test logout without being logged in."""
+        response = auth_client.post("/api/v1/auth/logout")
+        # Should succeed even without session
+        assert response.status_code == 200
+
+
+class TestAuthMe:
+    """Tests for get current user endpoint."""
+
+    @pytest.mark.integration
+    def test_get_me_authenticated(self, auth_client):
+        """Test getting current user when authenticated."""
+        # Login first
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+
+        response = auth_client.get("/api/v1/auth/me")
+        assert response.status_code == 200
+        data = response.json()
+        assert data["username"] == "admin"
+        assert data["is_admin"] is True
+        assert "id" in data
+        assert "created_at" in data
+
+    @pytest.mark.integration
+    def test_get_me_unauthenticated(self, auth_client):
+        """Test getting current user without authentication."""
+        # Clear any existing cookies
+        auth_client.cookies.clear()
+
+        response = auth_client.get("/api/v1/auth/me")
+        assert response.status_code == 401
+        assert "Not authenticated" in response.json()["detail"]
+
+
+class TestAuthChangePassword:
+    """Tests for change password endpoint.
+
+    Note: These tests use dedicated test users instead of admin to avoid
+    invalidating the integration_client session (which uses admin).
+    """
+
+    @pytest.mark.integration
+    def test_change_password_success(self, auth_client):
+        """Test successful password change."""
+        # Login as admin to create a test user
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+        test_username = f"pwchange_{uuid4().hex[:8]}"
+        auth_client.post(
+            "/api/v1/admin/users",
+            json={"username": test_username, "password": "oldpassword123"},
+        )
+
+        # Login as test user
+        auth_client.cookies.clear()
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": test_username, "password": "oldpassword123"},
+        )
+
+        # Change password
+        response = auth_client.post(
+            "/api/v1/auth/change-password",
+            json={"current_password": "oldpassword123", "new_password": "newpassword123"},
+        )
+        assert response.status_code == 200
+
+        # Verify old password no longer works
+        auth_client.cookies.clear()
+        response = auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": test_username, "password": "oldpassword123"},
+        )
+        assert response.status_code == 401
+
+        # Verify new password works
+        response = auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": test_username, "password": "newpassword123"},
+        )
+        assert response.status_code == 200
+
+    @pytest.mark.integration
+    def test_change_password_wrong_current(self, auth_client):
+        """Test password change with wrong current password."""
+        # Login as admin to create a test user
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+        test_username = f"pwwrong_{uuid4().hex[:8]}"
+        auth_client.post(
+            "/api/v1/admin/users",
+            json={"username": test_username, "password": "password123"},
+        )
+
+        # Login as test user
+        auth_client.cookies.clear()
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": test_username, "password": "password123"},
+        )
+
+        response = auth_client.post(
+            "/api/v1/auth/change-password",
+            json={"current_password": "wrongpassword", "new_password": "newpassword"},
+        )
+        assert response.status_code == 400
+        assert "Current password is incorrect" in response.json()["detail"]
+
+
+class TestAPIKeys:
+    """Tests for API key management endpoints."""
+
+    @pytest.mark.integration
+    def test_create_and_list_api_key(self, auth_client):
+        """Test creating and listing API keys."""
+        # Login first
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+
+        # Create API key
+        create_response = auth_client.post(
+            "/api/v1/auth/keys",
+            json={"name": "test-key", "description": "Test API key"},
+        )
+        assert create_response.status_code == 200
+        data = create_response.json()
+        assert data["name"] == "test-key"
+        assert data["description"] == "Test API key"
+        assert "key" in data
+        assert data["key"].startswith("orch_")
+        key_id = data["id"]
+        api_key = data["key"]
+
+        # List API keys
+        list_response = auth_client.get("/api/v1/auth/keys")
+        assert list_response.status_code == 200
+        keys = list_response.json()
+        assert any(k["id"] == key_id for k in keys)
+
+        # Clean up - delete the key
+        auth_client.delete(f"/api/v1/auth/keys/{key_id}")
+
+    @pytest.mark.integration
+    def test_use_api_key_for_auth(self, auth_client):
+        """Test using API key for authentication."""
+        # Login and create API key
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+        create_response = auth_client.post(
+            "/api/v1/auth/keys",
+            json={"name": "auth-test-key"},
+        )
+        api_key = create_response.json()["key"]
+        key_id = create_response.json()["id"]
+
+        # Clear cookies and use API key
+        auth_client.cookies.clear()
+        response = auth_client.get(
+            "/api/v1/auth/me",
+            headers={"Authorization": f"Bearer {api_key}"},
+        )
+        assert response.status_code == 200
+        assert response.json()["username"] == "admin"
+
+        # Clean up
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+        auth_client.delete(f"/api/v1/auth/keys/{key_id}")
+
+    @pytest.mark.integration
+    def test_delete_api_key(self, auth_client):
+        """Test revoking an API key."""
+        # Login and create API key
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+        create_response = auth_client.post(
+            "/api/v1/auth/keys",
+            json={"name": "delete-test-key"},
+        )
+        key_id = create_response.json()["id"]
+        api_key = create_response.json()["key"]
+
+        # Delete the key
+        delete_response = auth_client.delete(f"/api/v1/auth/keys/{key_id}")
+        assert delete_response.status_code == 200
+
+        # Verify key no longer works
+        auth_client.cookies.clear()
+        response = auth_client.get(
+            "/api/v1/auth/me",
+            headers={"Authorization": f"Bearer {api_key}"},
+        )
+        assert response.status_code == 401
+
+
+class TestAdminUserManagement:
+    """Tests for admin user management endpoints."""
+
+    @pytest.mark.integration
+    def test_list_users(self, auth_client):
+        """Test listing users as admin."""
+        # Login as admin
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+
+        response = auth_client.get("/api/v1/admin/users")
+        assert response.status_code == 200
+        users = response.json()
+        assert len(users) >= 1
+        assert any(u["username"] == "admin" for u in users)
+
+    @pytest.mark.integration
+    def test_create_user(self, auth_client):
+        """Test creating a new user as admin."""
+        # Login as admin
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+
+        # Create new user
+        test_username = f"testuser_{uuid4().hex[:8]}"
+        response = auth_client.post(
+            "/api/v1/admin/users",
+            json={
+                "username": test_username,
+                "password": "testpassword",
+                "email": "test@example.com",
+            },
+        )
+        assert response.status_code == 200
+        data = response.json()
+        assert data["username"] == test_username
+        assert data["email"] == "test@example.com"
+        assert data["is_admin"] is False
+
+        # Verify new user can login
+        auth_client.cookies.clear()
+        login_response = auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": test_username, "password": "testpassword"},
+        )
+        assert login_response.status_code == 200
+
+    @pytest.mark.integration
+    def test_update_user(self, auth_client):
+        """Test updating a user as admin."""
+        # Login as admin
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+
+        # Create a test user
+        test_username = f"updateuser_{uuid4().hex[:8]}"
+        auth_client.post(
+            "/api/v1/admin/users",
+            json={"username": test_username, "password": "password"},
+        )
+
+        # Update the user
+        response = auth_client.put(
+            f"/api/v1/admin/users/{test_username}",
+            json={"email": "updated@example.com", "is_admin": True},
+        )
+        assert response.status_code == 200
+        data = response.json()
+        assert data["email"] == "updated@example.com"
+        assert data["is_admin"] is True
+
+    @pytest.mark.integration
+    def test_reset_user_password(self, auth_client):
+        """Test resetting a user's password as admin."""
+        # Login as admin
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+
+        # Create a test user
+        test_username = f"resetuser_{uuid4().hex[:8]}"
+        auth_client.post(
+            "/api/v1/admin/users",
+            json={"username": test_username, "password": "oldpassword"},
+        )
+
+        # Reset password
+        response = auth_client.post(
+            f"/api/v1/admin/users/{test_username}/reset-password",
+            json={"new_password": "newpassword"},
+        )
+        assert response.status_code == 200
+
+        # Verify new password works
+        auth_client.cookies.clear()
+        login_response = auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": test_username, "password": "newpassword"},
+        )
+        assert login_response.status_code == 200
+
+    @pytest.mark.integration
+    def test_non_admin_cannot_access_admin_endpoints(self, auth_client):
+        """Test that non-admin users cannot access admin endpoints."""
+        # Login as admin and create non-admin user
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+        test_username = f"nonadmin_{uuid4().hex[:8]}"
+        auth_client.post(
+            "/api/v1/admin/users",
+            json={"username": test_username, "password": "password", "is_admin": False},
+        )
+
+        # Login as non-admin
+        auth_client.cookies.clear()
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": test_username, "password": "password"},
+        )
+
+        # Try to access admin endpoints
+        response = auth_client.get("/api/v1/admin/users")
+        assert response.status_code == 403
+        assert "Admin privileges required" in response.json()["detail"]
+
+
+class TestSecurityEdgeCases:
+    """Tests for security edge cases and validation."""
+
+    @pytest.mark.integration
+    def test_login_inactive_user(self, auth_client):
+        """Test that inactive users cannot login."""
+        # Login as admin and create a user
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+        test_username = f"inactive_{uuid4().hex[:8]}"
+        auth_client.post(
+            "/api/v1/admin/users",
+            json={"username": test_username, "password": "password123"},
+        )
+
+        # Deactivate the user
+        auth_client.put(
+            f"/api/v1/admin/users/{test_username}",
+            json={"is_active": False},
+        )
+
+        # Try to login as inactive user
+        auth_client.cookies.clear()
+        response = auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": test_username, "password": "password123"},
+        )
+        assert response.status_code == 401
+        assert "Invalid username or password" in response.json()["detail"]
+
+    @pytest.mark.integration
+    def test_password_too_short_on_create(self, auth_client):
+        """Test that short passwords are rejected when creating users."""
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+
+        response = auth_client.post(
+            "/api/v1/admin/users",
+            json={"username": f"shortpw_{uuid4().hex[:8]}", "password": "short"},
+        )
+        assert response.status_code == 400
+        assert "at least 8 characters" in response.json()["detail"]
+
+    @pytest.mark.integration
+    def test_password_too_short_on_change(self, auth_client):
+        """Test that short passwords are rejected when changing password."""
+        # Create test user
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+        test_username = f"shortchange_{uuid4().hex[:8]}"
+        auth_client.post(
+            "/api/v1/admin/users",
+            json={"username": test_username, "password": "password123"},
+        )
+
+        # Login as test user
+        auth_client.cookies.clear()
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": test_username, "password": "password123"},
+        )
+
+        response = auth_client.post(
+            "/api/v1/auth/change-password",
+            json={"current_password": "password123", "new_password": "short"},
+        )
+        assert response.status_code == 400
+        assert "at least 8 characters" in response.json()["detail"]
+
+    @pytest.mark.integration
+    def test_password_too_short_on_reset(self, auth_client):
+        """Test that short passwords are rejected when resetting password."""
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+
+        # Create a test user first
+        test_username = f"resetshort_{uuid4().hex[:8]}"
+        auth_client.post(
+            "/api/v1/admin/users",
+            json={"username": test_username, "password": "password123"},
+        )
+
+        response = auth_client.post(
+            f"/api/v1/admin/users/{test_username}/reset-password",
+            json={"new_password": "short"},
+        )
+        assert response.status_code == 400
+        assert "at least 8 characters" in response.json()["detail"]
+
+    @pytest.mark.integration
+    def test_duplicate_username_rejected(self, auth_client):
+        """Test that duplicate usernames are rejected."""
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+
+        test_username = f"duplicate_{uuid4().hex[:8]}"
+        # Create user first time
+        response1 = auth_client.post(
+            "/api/v1/admin/users",
+            json={"username": test_username, "password": "password123"},
+        )
+        assert response1.status_code == 200
+
+        # Try to create same username again
+        response2 = auth_client.post(
+            "/api/v1/admin/users",
+            json={"username": test_username, "password": "password456"},
+        )
+        assert response2.status_code == 409
+        assert "already exists" in response2.json()["detail"]
+
+    @pytest.mark.integration
+    def test_cannot_delete_other_users_api_key(self, auth_client):
+        """Test that users cannot delete API keys owned by other users."""
+        # Login as admin and create an API key
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+        create_response = auth_client.post(
+            "/api/v1/auth/keys",
+            json={"name": "admin-key"},
+        )
+        admin_key_id = create_response.json()["id"]
+
+        # Create a non-admin user
+        test_username = f"nonadmin_{uuid4().hex[:8]}"
+        auth_client.post(
+            "/api/v1/admin/users",
+            json={"username": test_username, "password": "password123"},
+        )
+
+        # Login as non-admin
+        auth_client.cookies.clear()
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": test_username, "password": "password123"},
+        )
+
+        # Try to delete admin's API key
+        response = auth_client.delete(f"/api/v1/auth/keys/{admin_key_id}")
+        assert response.status_code == 403
+        assert "Cannot delete another user's API key" in response.json()["detail"]
+
+        # Cleanup: login as admin and delete the key
+        auth_client.cookies.clear()
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+        auth_client.delete(f"/api/v1/auth/keys/{admin_key_id}")
+
+    @pytest.mark.integration
+    def test_sessions_invalidated_on_password_change(self, auth_client):
+        """Test that all sessions are invalidated when password is changed."""
+        # Create a test user
+        auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": "admin", "password": "changeme123"},
+        )
+        test_username = f"sessiontest_{uuid4().hex[:8]}"
+        auth_client.post(
+            "/api/v1/admin/users",
+            json={"username": test_username, "password": "password123"},
+        )
+
+        # Login as test user
+        auth_client.cookies.clear()
+        login_response = auth_client.post(
+            "/api/v1/auth/login",
+            json={"username": test_username, "password": "password123"},
+        )
+        assert login_response.status_code == 200
+
+        # Verify session works
+        me_response = auth_client.get("/api/v1/auth/me")
+        assert me_response.status_code == 200
+
+        # Change password
+        auth_client.post(
+            "/api/v1/auth/change-password",
+            json={"current_password": "password123", "new_password": "newpassword123"},
+        )
+
+        # Old session should be invalidated - try to access /me
+        # (note: the change-password call itself may have cleared the session cookie)
+        me_response2 = auth_client.get("/api/v1/auth/me")
+        # This should fail because all sessions were invalidated
+        assert me_response2.status_code == 401

backend/tests/integration/test_concurrent_operations.py

@@ -0,0 +1,737 @@
+"""
+Integration tests for concurrent upload and download operations.
+
+Tests cover:
+- Concurrent uploads of different files
+- Concurrent uploads of same file (deduplication race)
+- Concurrent downloads of same artifact
+- Concurrent downloads of different artifacts
+- Mixed concurrent uploads and downloads
+- Data corruption prevention under concurrency
+"""
+
+import pytest
+import io
+import os
+from concurrent.futures import ThreadPoolExecutor, as_completed
+from tests.factories import (
+    compute_sha256,
+    upload_test_file,
+    generate_content_with_hash,
+)
+
+
+def get_api_key(integration_client):
+    """Create an API key for concurrent test workers."""
+    import uuid
+    response = integration_client.post(
+        "/api/v1/auth/keys",
+        json={"name": f"concurrent-test-{uuid.uuid4().hex[:8]}"},
+    )
+    if response.status_code == 200:
+        return response.json()["key"]
+    return None
+
+
+class TestConcurrentUploads:
+    """Tests for concurrent upload operations."""
+
+    @pytest.mark.integration
+    @pytest.mark.concurrent
+    def test_2_concurrent_uploads_different_files(self, integration_client, test_package):
+        """Test 2 concurrent uploads of different files."""
+        project, package = test_package
+        api_key = get_api_key(integration_client)
+        assert api_key, "Failed to create API key"
+
+        files_data = [
+            generate_content_with_hash(1024, seed=i) for i in range(2)
+        ]
+
+        results = []
+        errors = []
+
+        def upload_worker(idx, content, expected_hash):
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    files = {
+                        "file": (f"file-{idx}.bin", io.BytesIO(content), "application/octet-stream")
+                    }
+                    response = client.post(
+                        f"/api/v1/project/{project}/{package}/upload",
+                        files=files,
+                        data={"tag": f"concurrent-{idx}"},
+                        headers={"Authorization": f"Bearer {api_key}"},
+                    )
+                    if response.status_code == 200:
+                        result = response.json()
+                        results.append((idx, result, expected_hash))
+                    else:
+                        errors.append(f"Worker {idx}: Status {response.status_code}: {response.text}")
+            except Exception as e:
+                errors.append(f"Worker {idx}: {str(e)}")
+
+        with ThreadPoolExecutor(max_workers=2) as executor:
+            futures = [
+                executor.submit(upload_worker, i, content, hash)
+                for i, (content, hash) in enumerate(files_data)
+            ]
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Errors: {errors}"
+        assert len(results) == 2
+
+        # Verify each upload returned correct artifact_id
+        for idx, result, expected_hash in results:
+            assert result["artifact_id"] == expected_hash
+
+    @pytest.mark.integration
+    @pytest.mark.concurrent
+    def test_5_concurrent_uploads_different_files(self, integration_client, test_package):
+        """Test 5 concurrent uploads of different files."""
+        project, package = test_package
+        api_key = get_api_key(integration_client)
+        assert api_key, "Failed to create API key"
+
+        num_files = 5
+        files_data = [
+            generate_content_with_hash(2048, seed=100 + i) for i in range(num_files)
+        ]
+
+        results = []
+        errors = []
+
+        def upload_worker(idx, content, expected_hash):
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    files = {
+                        "file": (f"file-{idx}.bin", io.BytesIO(content), "application/octet-stream")
+                    }
+                    response = client.post(
+                        f"/api/v1/project/{project}/{package}/upload",
+                        files=files,
+                        data={"tag": f"concurrent5-{idx}"},
+                        headers={"Authorization": f"Bearer {api_key}"},
+                    )
+                    if response.status_code == 200:
+                        result = response.json()
+                        results.append((idx, result, expected_hash))
+                    else:
+                        errors.append(f"Worker {idx}: Status {response.status_code}")
+            except Exception as e:
+                errors.append(f"Worker {idx}: {str(e)}")
+
+        with ThreadPoolExecutor(max_workers=num_files) as executor:
+            futures = [
+                executor.submit(upload_worker, i, content, hash)
+                for i, (content, hash) in enumerate(files_data)
+            ]
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Errors: {errors}"
+        assert len(results) == num_files
+
+        # Verify all uploads have unique artifact_ids
+        artifact_ids = set(r[1]["artifact_id"] for r in results)
+        assert len(artifact_ids) == num_files
+
+    @pytest.mark.integration
+    @pytest.mark.concurrent
+    def test_10_concurrent_uploads_different_files(self, integration_client, test_package):
+        """Test 10 concurrent uploads of different files."""
+        project, package = test_package
+        api_key = get_api_key(integration_client)
+        assert api_key, "Failed to create API key"
+
+        num_files = 10
+        files_data = [
+            generate_content_with_hash(1024, seed=200 + i) for i in range(num_files)
+        ]
+
+        results = []
+        errors = []
+
+        def upload_worker(idx, content, expected_hash):
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    files = {
+                        "file": (f"file-{idx}.bin", io.BytesIO(content), "application/octet-stream")
+                    }
+                    response = client.post(
+                        f"/api/v1/project/{project}/{package}/upload",
+                        files=files,
+                        data={"tag": f"concurrent10-{idx}"},
+                        headers={"Authorization": f"Bearer {api_key}"},
+                    )
+                    if response.status_code == 200:
+                        result = response.json()
+                        results.append((idx, result, expected_hash))
+                    else:
+                        errors.append(f"Worker {idx}: Status {response.status_code}")
+            except Exception as e:
+                errors.append(f"Worker {idx}: {str(e)}")
+
+        with ThreadPoolExecutor(max_workers=num_files) as executor:
+            futures = [
+                executor.submit(upload_worker, i, content, hash)
+                for i, (content, hash) in enumerate(files_data)
+            ]
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Errors: {errors}"
+        assert len(results) == num_files
+
+    @pytest.mark.integration
+    @pytest.mark.concurrent
+    def test_concurrent_uploads_same_file_deduplication(self, integration_client, test_package):
+        """Test concurrent uploads of same file handle deduplication correctly."""
+        project, package = test_package
+        api_key = get_api_key(integration_client)
+        assert api_key, "Failed to create API key"
+
+        content, expected_hash = generate_content_with_hash(4096, seed=999)
+        num_concurrent = 5
+
+        results = []
+        errors = []
+
+        def upload_worker(idx):
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    files = {
+                        "file": (f"same-{idx}.bin", io.BytesIO(content), "application/octet-stream")
+                    }
+                    response = client.post(
+                        f"/api/v1/project/{project}/{package}/upload",
+                        files=files,
+                        data={"tag": f"dedup-{idx}"},
+                        headers={"Authorization": f"Bearer {api_key}"},
+                    )
+                    if response.status_code == 200:
+                        results.append(response.json())
+                    else:
+                        errors.append(f"Worker {idx}: Status {response.status_code}")
+            except Exception as e:
+                errors.append(f"Worker {idx}: {str(e)}")
+
+        with ThreadPoolExecutor(max_workers=num_concurrent) as executor:
+            futures = [executor.submit(upload_worker, i) for i in range(num_concurrent)]
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Errors: {errors}"
+        assert len(results) == num_concurrent
+
+        # All should have same artifact_id
+        artifact_ids = set(r["artifact_id"] for r in results)
+        assert len(artifact_ids) == 1
+        assert expected_hash in artifact_ids
+
+        # Verify final ref_count equals number of uploads
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.status_code == 200
+        assert response.json()["ref_count"] == num_concurrent
+
+    @pytest.mark.integration
+    @pytest.mark.concurrent
+    def test_concurrent_uploads_to_different_packages(self, integration_client, test_project, unique_test_id):
+        """Test concurrent uploads to different packages."""
+        project = test_project
+        api_key = get_api_key(integration_client)
+        assert api_key, "Failed to create API key"
+
+        num_packages = 3
+        package_names = []
+
+        # Create multiple packages
+        for i in range(num_packages):
+            pkg_name = f"pkg-{unique_test_id}-{i}"
+            response = integration_client.post(
+                f"/api/v1/project/{project}/packages",
+                json={"name": pkg_name, "description": f"Package {i}"},
+            )
+            assert response.status_code == 200
+            package_names.append(pkg_name)
+
+        files_data = [
+            generate_content_with_hash(1024, seed=300 + i) for i in range(num_packages)
+        ]
+
+        results = []
+        errors = []
+
+        def upload_worker(idx, package, content, expected_hash):
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    files = {
+                        "file": (f"file-{idx}.bin", io.BytesIO(content), "application/octet-stream")
+                    }
+                    response = client.post(
+                        f"/api/v1/project/{project}/{package}/upload",
+                        files=files,
+                        data={"tag": "latest"},
+                        headers={"Authorization": f"Bearer {api_key}"},
+                    )
+                    if response.status_code == 200:
+                        result = response.json()
+                        results.append((package, result, expected_hash))
+                    else:
+                        errors.append(f"Worker {idx}: Status {response.status_code}")
+            except Exception as e:
+                errors.append(f"Worker {idx}: {str(e)}")
+
+        with ThreadPoolExecutor(max_workers=num_packages) as executor:
+            futures = [
+                executor.submit(upload_worker, i, package_names[i], content, hash)
+                for i, (content, hash) in enumerate(files_data)
+            ]
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Errors: {errors}"
+        assert len(results) == num_packages
+
+
+class TestConcurrentDownloads:
+    """Tests for concurrent download operations."""
+
+    @pytest.mark.integration
+    @pytest.mark.concurrent
+    def test_2_concurrent_downloads_same_artifact(self, integration_client, test_package):
+        """Test 2 concurrent downloads of same artifact."""
+        project, package = test_package
+        content, expected_hash = generate_content_with_hash(2048, seed=400)
+
+        # Upload first
+        upload_test_file(integration_client, project, package, content, tag="download-test")
+
+        results = []
+        errors = []
+
+        def download_worker(idx):
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    response = client.get(
+                        f"/api/v1/project/{project}/{package}/+/download-test",
+                        params={"mode": "proxy"},
+                    )
+                    if response.status_code == 200:
+                        results.append((idx, response.content))
+                    else:
+                        errors.append(f"Worker {idx}: Status {response.status_code}")
+            except Exception as e:
+                errors.append(f"Worker {idx}: {str(e)}")
+
+        with ThreadPoolExecutor(max_workers=2) as executor:
+            futures = [executor.submit(download_worker, i) for i in range(2)]
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Errors: {errors}"
+        assert len(results) == 2
+
+        # All downloads should match original
+        for idx, downloaded in results:
+            assert downloaded == content
+
+    @pytest.mark.integration
+    @pytest.mark.concurrent
+    def test_5_concurrent_downloads_same_artifact(self, integration_client, test_package):
+        """Test 5 concurrent downloads of same artifact."""
+        project, package = test_package
+        content, expected_hash = generate_content_with_hash(4096, seed=500)
+
+        upload_test_file(integration_client, project, package, content, tag="download5-test")
+
+        num_downloads = 5
+        results = []
+        errors = []
+
+        def download_worker(idx):
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    response = client.get(
+                        f"/api/v1/project/{project}/{package}/+/download5-test",
+                        params={"mode": "proxy"},
+                    )
+                    if response.status_code == 200:
+                        results.append((idx, response.content))
+                    else:
+                        errors.append(f"Worker {idx}: Status {response.status_code}")
+            except Exception as e:
+                errors.append(f"Worker {idx}: {str(e)}")
+
+        with ThreadPoolExecutor(max_workers=num_downloads) as executor:
+            futures = [executor.submit(download_worker, i) for i in range(num_downloads)]
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Errors: {errors}"
+        assert len(results) == num_downloads
+
+        for idx, downloaded in results:
+            assert downloaded == content
+
+    @pytest.mark.integration
+    @pytest.mark.concurrent
+    def test_10_concurrent_downloads_same_artifact(self, integration_client, test_package):
+        """Test 10 concurrent downloads of same artifact."""
+        project, package = test_package
+        content, expected_hash = generate_content_with_hash(8192, seed=600)
+
+        upload_test_file(integration_client, project, package, content, tag="download10-test")
+
+        num_downloads = 10
+        results = []
+        errors = []
+
+        def download_worker(idx):
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    response = client.get(
+                        f"/api/v1/project/{project}/{package}/+/download10-test",
+                        params={"mode": "proxy"},
+                    )
+                    if response.status_code == 200:
+                        results.append((idx, response.content))
+                    else:
+                        errors.append(f"Worker {idx}: Status {response.status_code}")
+            except Exception as e:
+                errors.append(f"Worker {idx}: {str(e)}")
+
+        with ThreadPoolExecutor(max_workers=num_downloads) as executor:
+            futures = [executor.submit(download_worker, i) for i in range(num_downloads)]
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Errors: {errors}"
+        assert len(results) == num_downloads
+
+        for idx, downloaded in results:
+            assert downloaded == content
+
+    @pytest.mark.integration
+    @pytest.mark.concurrent
+    def test_concurrent_downloads_different_artifacts(self, integration_client, test_package):
+        """Test concurrent downloads of different artifacts."""
+        project, package = test_package
+
+        # Upload multiple files
+        num_files = 5
+        uploads = []
+        for i in range(num_files):
+            content, expected_hash = generate_content_with_hash(1024, seed=700 + i)
+            upload_test_file(
+                integration_client, project, package, content,
+                tag=f"multi-download-{i}"
+            )
+            uploads.append((f"multi-download-{i}", content))
+
+        results = []
+        errors = []
+
+        def download_worker(tag, expected_content):
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    response = client.get(
+                        f"/api/v1/project/{project}/{package}/+/{tag}",
+                        params={"mode": "proxy"},
+                    )
+                    if response.status_code == 200:
+                        results.append((tag, response.content, expected_content))
+                    else:
+                        errors.append(f"Tag {tag}: Status {response.status_code}")
+            except Exception as e:
+                errors.append(f"Tag {tag}: {str(e)}")
+
+        with ThreadPoolExecutor(max_workers=num_files) as executor:
+            futures = [
+                executor.submit(download_worker, tag, content)
+                for tag, content in uploads
+            ]
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Errors: {errors}"
+        assert len(results) == num_files
+
+        for tag, downloaded, expected in results:
+            assert downloaded == expected, f"Content mismatch for {tag}"
+
+
+class TestMixedConcurrentOperations:
+    """Tests for mixed concurrent upload and download operations."""
+
+    @pytest.mark.integration
+    @pytest.mark.concurrent
+    def test_upload_while_download_in_progress(self, integration_client, test_package):
+        """Test uploading while a download is in progress."""
+        project, package = test_package
+        api_key = get_api_key(integration_client)
+        assert api_key, "Failed to create API key"
+
+        # Upload initial content
+        content1, hash1 = generate_content_with_hash(10240, seed=800)  # 10KB
+        upload_test_file(integration_client, project, package, content1, tag="initial")
+
+        # New content for upload during download
+        content2, hash2 = generate_content_with_hash(10240, seed=801)
+
+        results = {"downloads": [], "uploads": []}
+        errors = []
+
+        def download_worker():
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    response = client.get(
+                        f"/api/v1/project/{project}/{package}/+/initial",
+                        params={"mode": "proxy"},
+                    )
+                    if response.status_code == 200:
+                        results["downloads"].append(response.content)
+                    else:
+                        errors.append(f"Download: Status {response.status_code}")
+            except Exception as e:
+                errors.append(f"Download: {str(e)}")
+
+        def upload_worker():
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    files = {
+                        "file": ("new.bin", io.BytesIO(content2), "application/octet-stream")
+                    }
+                    response = client.post(
+                        f"/api/v1/project/{project}/{package}/upload",
+                        files=files,
+                        data={"tag": "during-download"},
+                        headers={"Authorization": f"Bearer {api_key}"},
+                    )
+                    if response.status_code == 200:
+                        results["uploads"].append(response.json())
+                    else:
+                        errors.append(f"Upload: Status {response.status_code}")
+            except Exception as e:
+                errors.append(f"Upload: {str(e)}")
+
+        with ThreadPoolExecutor(max_workers=2) as executor:
+            futures = [
+                executor.submit(download_worker),
+                executor.submit(upload_worker),
+            ]
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Errors: {errors}"
+        assert len(results["downloads"]) == 1
+        assert len(results["uploads"]) == 1
+
+        # Verify download got correct content
+        assert results["downloads"][0] == content1
+
+        # Verify upload succeeded
+        assert results["uploads"][0]["artifact_id"] == hash2
+
+    @pytest.mark.integration
+    @pytest.mark.concurrent
+    def test_multiple_uploads_and_downloads_simultaneously(self, integration_client, test_package):
+        """Test multiple uploads and downloads running simultaneously."""
+        project, package = test_package
+        api_key = get_api_key(integration_client)
+        assert api_key, "Failed to create API key"
+
+        # Pre-upload some files for downloading
+        existing_files = []
+        for i in range(3):
+            content, hash = generate_content_with_hash(2048, seed=900 + i)
+            upload_test_file(integration_client, project, package, content, tag=f"existing-{i}")
+            existing_files.append((f"existing-{i}", content))
+
+        # New files for uploading
+        new_files = [
+            generate_content_with_hash(2048, seed=910 + i) for i in range(3)
+        ]
+
+        results = {"downloads": [], "uploads": []}
+        errors = []
+
+        def download_worker(tag, expected):
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    response = client.get(
+                        f"/api/v1/project/{project}/{package}/+/{tag}",
+                        params={"mode": "proxy"},
+                    )
+                    if response.status_code == 200:
+                        results["downloads"].append((tag, response.content, expected))
+                    else:
+                        errors.append(f"Download {tag}: Status {response.status_code}")
+            except Exception as e:
+                errors.append(f"Download {tag}: {str(e)}")
+
+        def upload_worker(idx, content, expected_hash):
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    files = {
+                        "file": (f"new-{idx}.bin", io.BytesIO(content), "application/octet-stream")
+                    }
+                    response = client.post(
+                        f"/api/v1/project/{project}/{package}/upload",
+                        files=files,
+                        data={"tag": f"new-{idx}"},
+                        headers={"Authorization": f"Bearer {api_key}"},
+                    )
+                    if response.status_code == 200:
+                        results["uploads"].append((idx, response.json(), expected_hash))
+                    else:
+                        errors.append(f"Upload {idx}: Status {response.status_code}")
+            except Exception as e:
+                errors.append(f"Upload {idx}: {str(e)}")
+
+        with ThreadPoolExecutor(max_workers=6) as executor:
+            futures = []
+
+            # Submit downloads
+            for tag, content in existing_files:
+                futures.append(executor.submit(download_worker, tag, content))
+
+            # Submit uploads
+            for i, (content, hash) in enumerate(new_files):
+                futures.append(executor.submit(upload_worker, i, content, hash))
+
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Errors: {errors}"
+        assert len(results["downloads"]) == 3
+        assert len(results["uploads"]) == 3
+
+        # Verify downloads
+        for tag, downloaded, expected in results["downloads"]:
+            assert downloaded == expected, f"Download mismatch for {tag}"
+
+        # Verify uploads
+        for idx, result, expected_hash in results["uploads"]:
+            assert result["artifact_id"] == expected_hash
+
+    @pytest.mark.integration
+    @pytest.mark.concurrent
+    def test_no_data_corruption_under_concurrency(self, integration_client, test_package):
+        """Test that no data corruption occurs under concurrent operations."""
+        project, package = test_package
+        api_key = get_api_key(integration_client)
+        assert api_key, "Failed to create API key"
+
+        # Create content with recognizable patterns
+        num_files = 5
+        files_data = []
+        for i in range(num_files):
+            # Each file has unique repeating pattern for easy corruption detection
+            pattern = bytes([i] * 256)
+            content = pattern * 40  # 10KB each
+            hash = compute_sha256(content)
+            files_data.append((content, hash))
+
+        results = []
+        errors = []
+
+        def upload_and_verify(idx, content, expected_hash):
+            try:
+                from httpx import Client
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+
+                with Client(base_url=base_url, timeout=60.0) as client:
+                    # Upload
+                    files = {
+                        "file": (f"pattern-{idx}.bin", io.BytesIO(content), "application/octet-stream")
+                    }
+                    upload_resp = client.post(
+                        f"/api/v1/project/{project}/{package}/upload",
+                        files=files,
+                        data={"tag": f"pattern-{idx}"},
+                        headers={"Authorization": f"Bearer {api_key}"},
+                    )
+                    if upload_resp.status_code != 200:
+                        errors.append(f"Upload {idx}: Status {upload_resp.status_code}")
+                        return
+
+                    upload_result = upload_resp.json()
+                    if upload_result["artifact_id"] != expected_hash:
+                        errors.append(f"Upload {idx}: Hash mismatch")
+                        return
+
+                    # Immediately download and verify
+                    download_resp = client.get(
+                        f"/api/v1/project/{project}/{package}/+/pattern-{idx}",
+                        params={"mode": "proxy"},
+                    )
+                    if download_resp.status_code != 200:
+                        errors.append(f"Download {idx}: Status {download_resp.status_code}")
+                        return
+
+                    if download_resp.content != content:
+                        errors.append(f"Worker {idx}: DATA CORRUPTION DETECTED")
+                        return
+
+                    # Verify the downloaded content hash
+                    downloaded_hash = compute_sha256(download_resp.content)
+                    if downloaded_hash != expected_hash:
+                        errors.append(f"Worker {idx}: Hash verification failed")
+                        return
+
+                    results.append(idx)
+
+            except Exception as e:
+                errors.append(f"Worker {idx}: {str(e)}")
+
+        with ThreadPoolExecutor(max_workers=num_files) as executor:
+            futures = [
+                executor.submit(upload_and_verify, i, content, hash)
+                for i, (content, hash) in enumerate(files_data)
+            ]
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Errors: {errors}"
+        assert len(results) == num_files

backend/tests/integration/test_error_handling.py

@@ -0,0 +1,322 @@
+"""
+Integration tests for error handling in upload and download operations.
+
+Tests cover:
+- Timeout handling
+- Invalid request handling
+- Resource cleanup on failures
+- Graceful error responses
+"""
+
+import pytest
+import io
+import time
+from tests.factories import (
+    compute_sha256,
+    upload_test_file,
+    generate_content_with_hash,
+)
+
+
+class TestUploadErrorHandling:
+    """Tests for upload error handling."""
+
+    @pytest.mark.integration
+    def test_upload_to_nonexistent_project_returns_404(
+        self, integration_client, unique_test_id
+    ):
+        """Test upload to nonexistent project returns 404."""
+        content = b"test content for nonexistent project"
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/nonexistent-project-{unique_test_id}/nonexistent-pkg/upload",
+            files=files,
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_upload_to_nonexistent_package_returns_404(
+        self, integration_client, test_project, unique_test_id
+    ):
+        """Test upload to nonexistent package returns 404."""
+        content = b"test content for nonexistent package"
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{test_project}/nonexistent-package-{unique_test_id}/upload",
+            files=files,
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_upload_empty_file_rejected(self, integration_client, test_package):
+        """Test empty file upload is rejected."""
+        project, package = test_package
+
+        files = {"file": ("empty.bin", io.BytesIO(b""), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+        )
+        assert response.status_code in [400, 422]
+
+    @pytest.mark.integration
+    def test_upload_missing_file_returns_422(self, integration_client, test_package):
+        """Test upload without file field returns 422."""
+        project, package = test_package
+
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            data={"tag": "no-file-provided"},
+        )
+        assert response.status_code == 422
+
+    @pytest.mark.integration
+    def test_upload_invalid_checksum_format_returns_400(
+        self, integration_client, test_package
+    ):
+        """Test upload with invalid checksum format returns 400."""
+        project, package = test_package
+        content = b"checksum format test"
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            headers={"X-Checksum-SHA256": "invalid-hash-format"},
+        )
+        assert response.status_code == 400
+
+    @pytest.mark.integration
+    def test_upload_checksum_mismatch_returns_422(
+        self, integration_client, test_package
+    ):
+        """Test upload with mismatched checksum returns 422."""
+        project, package = test_package
+        content = b"checksum mismatch test"
+        wrong_hash = "0" * 64  # Valid format but wrong hash
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            headers={"X-Checksum-SHA256": wrong_hash},
+        )
+        assert response.status_code == 422
+
+    @pytest.mark.integration
+    def test_upload_with_correct_checksum_succeeds(
+        self, integration_client, test_package
+    ):
+        """Test upload with correct checksum succeeds."""
+        project, package = test_package
+        content = b"correct checksum test"
+        correct_hash = compute_sha256(content)
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            headers={"X-Checksum-SHA256": correct_hash},
+        )
+        assert response.status_code == 200
+        assert response.json()["artifact_id"] == correct_hash
+
+
+class TestDownloadErrorHandling:
+    """Tests for download error handling."""
+
+    @pytest.mark.integration
+    def test_download_nonexistent_tag_returns_404(
+        self, integration_client, test_package
+    ):
+        """Test download of nonexistent tag returns 404."""
+        project, package = test_package
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/nonexistent-tag-xyz"
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_download_nonexistent_artifact_returns_404(
+        self, integration_client, test_package
+    ):
+        """Test download of nonexistent artifact ID returns 404."""
+        project, package = test_package
+        fake_hash = "a" * 64
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/artifact:{fake_hash}"
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_download_invalid_artifact_id_format(
+        self, integration_client, test_package
+    ):
+        """Test download with invalid artifact ID format."""
+        project, package = test_package
+
+        # Too short
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/artifact:abc123"
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_download_from_nonexistent_project_returns_404(
+        self, integration_client, unique_test_id
+    ):
+        """Test download from nonexistent project returns 404."""
+        response = integration_client.get(
+            f"/api/v1/project/nonexistent-{unique_test_id}/pkg/+/tag"
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_download_from_nonexistent_package_returns_404(
+        self, integration_client, test_project, unique_test_id
+    ):
+        """Test download from nonexistent package returns 404."""
+        response = integration_client.get(
+            f"/api/v1/project/{test_project}/nonexistent-{unique_test_id}/+/tag"
+        )
+        assert response.status_code == 404
+
+
+class TestTimeoutBehavior:
+    """Tests for timeout behavior (integration level)."""
+
+    @pytest.mark.integration
+    @pytest.mark.slow
+    def test_large_upload_completes_within_reasonable_time(
+        self, integration_client, test_package, sized_content
+    ):
+        """Test that a 10MB upload completes within reasonable time."""
+        project, package = test_package
+        content, expected_hash = sized_content(10 * 1024 * 1024, seed=999)  # 10MB
+
+        start_time = time.time()
+        result = upload_test_file(
+            integration_client, project, package, content, tag="timeout-test"
+        )
+        elapsed = time.time() - start_time
+
+        assert result["artifact_id"] == expected_hash
+        # Should complete within 60 seconds for 10MB on local docker
+        assert elapsed < 60, f"Upload took too long: {elapsed:.2f}s"
+
+    @pytest.mark.integration
+    @pytest.mark.slow
+    def test_large_download_completes_within_reasonable_time(
+        self, integration_client, test_package, sized_content
+    ):
+        """Test that a 10MB download completes within reasonable time."""
+        project, package = test_package
+        content, expected_hash = sized_content(10 * 1024 * 1024, seed=998)  # 10MB
+
+        # First upload
+        upload_test_file(
+            integration_client, project, package, content, tag="download-timeout-test"
+        )
+
+        # Then download and time it
+        start_time = time.time()
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/download-timeout-test",
+            params={"mode": "proxy"},
+        )
+        elapsed = time.time() - start_time
+
+        assert response.status_code == 200
+        assert len(response.content) == len(content)
+        # Should complete within 60 seconds for 10MB on local docker
+        assert elapsed < 60, f"Download took too long: {elapsed:.2f}s"
+
+
+class TestResourceCleanup:
+    """Tests for proper resource cleanup on failures.
+
+    Note: More comprehensive cleanup tests are in test_upload_download_api.py
+    (TestUploadFailureCleanup class) including S3 object cleanup verification.
+    """
+
+    @pytest.mark.integration
+    def test_checksum_mismatch_no_orphaned_artifact(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test checksum mismatch doesn't leave orphaned artifact."""
+        project, package = test_package
+        # Use unique content to ensure artifact doesn't exist from prior tests
+        content = f"checksum mismatch orphan test {unique_test_id}".encode()
+        wrong_hash = "0" * 64
+        actual_hash = compute_sha256(content)
+
+        # Verify artifact doesn't exist before test
+        pre_check = integration_client.get(f"/api/v1/artifact/{actual_hash}")
+        assert pre_check.status_code == 404, "Artifact should not exist before test"
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            headers={"X-Checksum-SHA256": wrong_hash},
+        )
+        assert response.status_code == 422
+
+        # Verify no artifact was created with either hash
+        response1 = integration_client.get(f"/api/v1/artifact/{wrong_hash}")
+        response2 = integration_client.get(f"/api/v1/artifact/{actual_hash}")
+        assert response1.status_code == 404
+        assert response2.status_code == 404
+
+
+class TestGracefulErrorResponses:
+    """Tests for graceful and informative error responses."""
+
+    @pytest.mark.integration
+    def test_404_response_has_detail_message(
+        self, integration_client, test_package
+    ):
+        """Test 404 responses include a detail message."""
+        project, package = test_package
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/nonexistent-tag"
+        )
+        assert response.status_code == 404
+        data = response.json()
+        assert "detail" in data
+        assert len(data["detail"]) > 0
+
+    @pytest.mark.integration
+    def test_422_response_has_detail_message(self, integration_client, test_package):
+        """Test 422 responses include a detail message."""
+        project, package = test_package
+
+        # Upload with mismatched checksum
+        content = b"detail message test"
+        wrong_hash = "0" * 64
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            headers={"X-Checksum-SHA256": wrong_hash},
+        )
+        assert response.status_code == 422
+        data = response.json()
+        assert "detail" in data
+
+    @pytest.mark.integration
+    def test_error_response_is_json(self, integration_client, unique_test_id):
+        """Test error responses are valid JSON."""
+        response = integration_client.get(
+            f"/api/v1/project/nonexistent-{unique_test_id}/pkg/+/tag"
+        )
+        assert response.status_code == 404
+        # Should not raise exception - valid JSON
+        data = response.json()
+        assert isinstance(data, dict)

backend/tests/integration/test_integrity_verification.py

@@ -0,0 +1,768 @@
+"""
+Integration tests for artifact integrity verification.
+
+Tests cover:
+- Round-trip verification (upload -> download -> verify hash)
+- Consistency check endpoint
+- Header-based verification
+- Integrity verification across file sizes
+- Client-side verification workflow
+"""
+
+import pytest
+import io
+import hashlib
+from tests.factories import (
+    compute_sha256,
+    upload_test_file,
+    generate_content_with_hash,
+    s3_object_exists,
+    get_s3_client,
+    get_s3_bucket,
+)
+from tests.conftest import (
+    SIZE_1KB,
+    SIZE_10KB,
+    SIZE_100KB,
+    SIZE_1MB,
+    SIZE_10MB,
+)
+
+
+class TestRoundTripVerification:
+    """Tests for complete round-trip integrity verification."""
+
+    @pytest.mark.integration
+    def test_upload_download_hash_matches(self, integration_client, test_package):
+        """Test that upload -> download round trip preserves content integrity."""
+        project, package = test_package
+        content = b"Round trip integrity test content"
+        expected_hash = compute_sha256(content)
+
+        # Upload and capture returned hash
+        result = upload_test_file(
+            integration_client, project, package, content, tag="roundtrip"
+        )
+        uploaded_hash = result["artifact_id"]
+
+        # Verify upload returned correct hash
+        assert uploaded_hash == expected_hash
+
+        # Download artifact
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/roundtrip",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+
+        # Compute hash of downloaded content
+        downloaded_hash = compute_sha256(response.content)
+
+        # All three hashes should match
+        assert downloaded_hash == expected_hash
+        assert downloaded_hash == uploaded_hash
+
+    @pytest.mark.integration
+    def test_upload_response_contains_hash(self, integration_client, test_package):
+        """Test upload response contains artifact_id which is the SHA256 hash."""
+        project, package = test_package
+        content = b"Upload response hash test"
+        expected_hash = compute_sha256(content)
+
+        result = upload_test_file(integration_client, project, package, content)
+
+        assert "artifact_id" in result
+        assert result["artifact_id"] == expected_hash
+        assert len(result["artifact_id"]) == 64
+        assert all(c in "0123456789abcdef" for c in result["artifact_id"])
+
+    @pytest.mark.integration
+    def test_download_header_matches_artifact_id(self, integration_client, test_package):
+        """Test X-Checksum-SHA256 header matches artifact ID."""
+        project, package = test_package
+        content = b"Header verification test"
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(
+            integration_client, project, package, content, tag="header-check"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/header-check",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.headers.get("X-Checksum-SHA256") == expected_hash
+
+    @pytest.mark.integration
+    def test_etag_matches_artifact_id(self, integration_client, test_package):
+        """Test ETag header matches artifact ID."""
+        project, package = test_package
+        content = b"ETag verification test"
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(
+            integration_client, project, package, content, tag="etag-check"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/etag-check",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        etag = response.headers.get("ETag", "").strip('"')
+        assert etag == expected_hash
+
+    @pytest.mark.integration
+    def test_artifact_endpoint_returns_correct_hash(self, integration_client, test_package):
+        """Test artifact endpoint returns correct hash/ID."""
+        project, package = test_package
+        content = b"Artifact endpoint hash test"
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(integration_client, project, package, content)
+
+        # Query artifact directly
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.status_code == 200
+        data = response.json()
+        assert data["id"] == expected_hash
+        assert data.get("sha256") == expected_hash
+
+
+class TestClientSideVerificationWorkflow:
+    """Tests for client-side verification workflow."""
+
+    @pytest.mark.integration
+    def test_client_can_verify_before_upload(self, integration_client, test_package):
+        """Test client can compute hash before upload and verify response matches."""
+        project, package = test_package
+        content = b"Client pre-upload verification test"
+
+        # Client computes hash locally before upload
+        client_hash = compute_sha256(content)
+
+        # Upload
+        result = upload_test_file(integration_client, project, package, content)
+
+        # Client verifies server returned the same hash
+        assert result["artifact_id"] == client_hash
+
+    @pytest.mark.integration
+    def test_client_can_provide_checksum_header(self, integration_client, test_package):
+        """Test client can provide X-Checksum-SHA256 header for verification."""
+        project, package = test_package
+        content = b"Client checksum header test"
+        client_hash = compute_sha256(content)
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            headers={"X-Checksum-SHA256": client_hash},
+        )
+        assert response.status_code == 200
+        assert response.json()["artifact_id"] == client_hash
+
+    @pytest.mark.integration
+    def test_checksum_mismatch_rejected(self, integration_client, test_package):
+        """Test upload with wrong client checksum is rejected."""
+        project, package = test_package
+        content = b"Checksum mismatch test"
+        wrong_hash = "0" * 64
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            headers={"X-Checksum-SHA256": wrong_hash},
+        )
+        assert response.status_code == 422
+
+    @pytest.mark.integration
+    def test_client_can_verify_after_download(self, integration_client, test_package):
+        """Test client can verify downloaded content matches header hash."""
+        project, package = test_package
+        content = b"Client post-download verification"
+
+        upload_test_file(
+            integration_client, project, package, content, tag="verify-after"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/verify-after",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+
+        # Client gets hash from header
+        header_hash = response.headers.get("X-Checksum-SHA256")
+
+        # Client computes hash of downloaded content
+        downloaded_hash = compute_sha256(response.content)
+
+        # Client verifies they match
+        assert downloaded_hash == header_hash
+
+
+class TestIntegritySizeVariants:
+    """Tests for integrity verification across different file sizes."""
+
+    @pytest.mark.integration
+    def test_integrity_1kb(self, integration_client, test_package, sized_content):
+        """Test integrity verification for 1KB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_1KB, seed=100)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="int-1kb"
+        )
+        assert result["artifact_id"] == expected_hash
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/int-1kb",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert compute_sha256(response.content) == expected_hash
+        assert response.headers.get("X-Checksum-SHA256") == expected_hash
+
+    @pytest.mark.integration
+    def test_integrity_100kb(self, integration_client, test_package, sized_content):
+        """Test integrity verification for 100KB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_100KB, seed=101)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="int-100kb"
+        )
+        assert result["artifact_id"] == expected_hash
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/int-100kb",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert compute_sha256(response.content) == expected_hash
+        assert response.headers.get("X-Checksum-SHA256") == expected_hash
+
+    @pytest.mark.integration
+    def test_integrity_1mb(self, integration_client, test_package, sized_content):
+        """Test integrity verification for 1MB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_1MB, seed=102)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="int-1mb"
+        )
+        assert result["artifact_id"] == expected_hash
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/int-1mb",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert compute_sha256(response.content) == expected_hash
+        assert response.headers.get("X-Checksum-SHA256") == expected_hash
+
+    @pytest.mark.integration
+    @pytest.mark.slow
+    def test_integrity_10mb(self, integration_client, test_package, sized_content):
+        """Test integrity verification for 10MB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_10MB, seed=103)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="int-10mb"
+        )
+        assert result["artifact_id"] == expected_hash
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/int-10mb",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert compute_sha256(response.content) == expected_hash
+        assert response.headers.get("X-Checksum-SHA256") == expected_hash
+
+
+class TestConsistencyCheck:
+    """Tests for the admin consistency check endpoint."""
+
+    @pytest.mark.integration
+    def test_consistency_check_returns_200(self, integration_client):
+        """Test consistency check endpoint returns 200."""
+        response = integration_client.get("/api/v1/admin/consistency-check")
+        assert response.status_code == 200
+
+    @pytest.mark.integration
+    def test_consistency_check_response_format(self, integration_client):
+        """Test consistency check returns expected response format."""
+        response = integration_client.get("/api/v1/admin/consistency-check")
+        assert response.status_code == 200
+        data = response.json()
+
+        # Check expected fields
+        assert "total_artifacts_checked" in data
+        assert "orphaned_s3_objects" in data
+        assert "missing_s3_objects" in data
+        assert "size_mismatches" in data
+        assert "healthy" in data
+        assert "orphaned_s3_keys" in data
+        assert "missing_s3_keys" in data
+        assert "size_mismatch_artifacts" in data
+        # Verify types
+        assert isinstance(data["total_artifacts_checked"], int)
+        assert isinstance(data["orphaned_s3_objects"], int)
+        assert isinstance(data["missing_s3_objects"], int)
+        assert isinstance(data["size_mismatches"], int)
+        assert isinstance(data["healthy"], bool)
+        assert isinstance(data["orphaned_s3_keys"], list)
+        assert isinstance(data["missing_s3_keys"], list)
+        assert isinstance(data["size_mismatch_artifacts"], list)
+
+    @pytest.mark.integration
+    def test_consistency_check_after_upload(self, integration_client, test_package):
+        """Test consistency check passes after valid upload."""
+        project, package = test_package
+        content = b"Consistency check test content"
+
+        # Upload artifact
+        upload_test_file(integration_client, project, package, content)
+
+        # Run consistency check
+        response = integration_client.get("/api/v1/admin/consistency-check")
+        assert response.status_code == 200
+        data = response.json()
+
+        # Verify check ran and no issues
+        assert data["total_artifacts_checked"] >= 1
+        assert data["healthy"] is True
+
+    @pytest.mark.integration
+    def test_consistency_check_limit_parameter(self, integration_client):
+        """Test consistency check respects limit parameter."""
+        response = integration_client.get(
+            "/api/v1/admin/consistency-check",
+            params={"limit": 10}
+        )
+        assert response.status_code == 200
+        data = response.json()
+
+        # Lists should not exceed limit
+        assert len(data["orphaned_s3_keys"]) <= 10
+        assert len(data["missing_s3_keys"]) <= 10
+        assert len(data["size_mismatch_artifacts"]) <= 10
+
+
+class TestDigestHeader:
+    """Tests for RFC 3230 Digest header."""
+
+    @pytest.mark.integration
+    def test_download_includes_digest_header(self, integration_client, test_package):
+        """Test download includes Digest header in RFC 3230 format."""
+        project, package = test_package
+        content = b"Digest header test"
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(
+            integration_client, project, package, content, tag="digest-test"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/digest-test",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert "Digest" in response.headers
+
+        # Verify Digest format (sha-256=base64hash)
+        digest = response.headers["Digest"]
+        assert digest.startswith("sha-256=")
+
+    @pytest.mark.integration
+    def test_digest_header_base64_valid(self, integration_client, test_package):
+        """Test Digest header contains valid base64 encoding."""
+        import base64
+
+        project, package = test_package
+        content = b"Digest base64 test"
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(
+            integration_client, project, package, content, tag="digest-b64"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/digest-b64",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+
+        digest = response.headers["Digest"]
+        base64_part = digest.split("=", 1)[1]
+
+        # Should be valid base64
+        try:
+            decoded = base64.b64decode(base64_part)
+            assert len(decoded) == 32  # SHA256 is 32 bytes
+        except Exception as e:
+            pytest.fail(f"Invalid base64 in Digest header: {e}")
+
+
+class TestVerificationModes:
+    """Tests for download verification modes."""
+
+    @pytest.mark.integration
+    def test_pre_verification_mode(self, integration_client, test_package):
+        """Test pre-verification mode verifies before streaming."""
+        project, package = test_package
+        content = b"Pre-verification mode test"
+
+        upload_test_file(
+            integration_client, project, package, content, tag="pre-verify"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/pre-verify",
+            params={"mode": "proxy", "verify": "true", "verify_mode": "pre"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+        # X-Verified header should be true
+        assert response.headers.get("X-Verified") == "true"
+
+    @pytest.mark.integration
+    def test_stream_verification_mode(self, integration_client, test_package):
+        """Test streaming verification mode."""
+        project, package = test_package
+        content = b"Stream verification mode test"
+
+        upload_test_file(
+            integration_client, project, package, content, tag="stream-verify"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/stream-verify",
+            params={"mode": "proxy", "verify": "true", "verify_mode": "stream"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+
+class TestArtifactIntegrityEndpoint:
+    """Tests for artifact-specific integrity operations."""
+
+    @pytest.mark.integration
+    def test_artifact_size_matches(self, integration_client, test_package):
+        """Test artifact endpoint returns correct size."""
+        project, package = test_package
+        content = b"Artifact size test content"
+        expected_size = len(content)
+
+        result = upload_test_file(integration_client, project, package, content)
+        artifact_id = result["artifact_id"]
+
+        response = integration_client.get(f"/api/v1/artifact/{artifact_id}")
+        assert response.status_code == 200
+        data = response.json()
+        assert data["size"] == expected_size
+
+    @pytest.mark.integration
+    def test_content_length_header_matches_size(self, integration_client, test_package):
+        """Test Content-Length header matches artifact size."""
+        project, package = test_package
+        content = b"Content-Length header test"
+        expected_size = len(content)
+
+        upload_test_file(
+            integration_client, project, package, content, tag="content-len"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/content-len",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert int(response.headers.get("Content-Length", 0)) == expected_size
+        assert len(response.content) == expected_size
+
+
+@pytest.mark.requires_direct_s3
+class TestCorruptionDetection:
+    """Tests for detecting corrupted S3 objects.
+
+    These tests directly manipulate S3 objects to simulate corruption
+    and verify that the system can detect hash mismatches.
+
+    Note: These tests require direct S3/MinIO access and are skipped in CI
+    where S3 is not directly accessible from the test runner.
+    """
+
+    @pytest.mark.integration
+    def test_detection_of_corrupted_content(self, integration_client, test_package):
+        """Test that corrupted S3 content is detected via hash mismatch.
+
+        Uploads content, then directly modifies the S3 object, then
+        verifies that the downloaded content hash doesn't match.
+        """
+        project, package = test_package
+        content = b"Original content for corruption test"
+        expected_hash = compute_sha256(content)
+
+        # Upload original content
+        result = upload_test_file(
+            integration_client, project, package, content, tag="corrupt-test"
+        )
+        assert result["artifact_id"] == expected_hash
+
+        # Get the S3 object and corrupt it
+        s3_client = get_s3_client()
+        bucket = get_s3_bucket()
+        s3_key = f"fruits/{expected_hash[:2]}/{expected_hash[2:4]}/{expected_hash}"
+
+        # Replace with corrupted content
+        corrupted_content = b"Corrupted content - different from original!"
+        s3_client.put_object(Bucket=bucket, Key=s3_key, Body=corrupted_content)
+
+        # Download via proxy (bypasses hash verification)
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/corrupt-test",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+
+        # Verify the downloaded content doesn't match original hash
+        downloaded_hash = compute_sha256(response.content)
+        assert downloaded_hash != expected_hash, "Corruption was not detected - hashes match"
+        assert response.content == corrupted_content
+
+        # The X-Checksum-SHA256 header should still show the original hash (from DB)
+        # but the actual content hash is different
+        header_hash = response.headers.get("X-Checksum-SHA256")
+        assert header_hash == expected_hash  # Header shows expected hash
+        assert downloaded_hash != header_hash  # But content is corrupted
+
+        # Restore original content for cleanup
+        s3_client.put_object(Bucket=bucket, Key=s3_key, Body=content)
+
+    @pytest.mark.integration
+    def test_detection_of_single_bit_flip(self, integration_client, test_package):
+        """Test detection of a single bit flip in S3 object content."""
+        project, package = test_package
+        content = b"Content for single bit flip detection test"
+        expected_hash = compute_sha256(content)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="bitflip-test"
+        )
+        assert result["artifact_id"] == expected_hash
+
+        # Get S3 object and flip a single bit
+        s3_client = get_s3_client()
+        bucket = get_s3_bucket()
+        s3_key = f"fruits/{expected_hash[:2]}/{expected_hash[2:4]}/{expected_hash}"
+
+        # Flip the first bit of the first byte
+        corrupted_content = bytearray(content)
+        corrupted_content[0] ^= 0x01
+        corrupted_content = bytes(corrupted_content)
+
+        s3_client.put_object(Bucket=bucket, Key=s3_key, Body=corrupted_content)
+
+        # Download and verify hash mismatch
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/bitflip-test",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+
+        downloaded_hash = compute_sha256(response.content)
+        assert downloaded_hash != expected_hash, "Single bit flip not detected"
+
+        # Restore original
+        s3_client.put_object(Bucket=bucket, Key=s3_key, Body=content)
+
+    @pytest.mark.integration
+    def test_detection_of_truncated_content(self, integration_client, test_package):
+        """Test detection of truncated S3 object."""
+        project, package = test_package
+        content = b"This is content that will be truncated for testing purposes"
+        expected_hash = compute_sha256(content)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="truncate-test"
+        )
+        assert result["artifact_id"] == expected_hash
+
+        # Get S3 object and truncate it
+        s3_client = get_s3_client()
+        bucket = get_s3_bucket()
+        s3_key = f"fruits/{expected_hash[:2]}/{expected_hash[2:4]}/{expected_hash}"
+
+        # Truncate to half the original size
+        truncated_content = content[: len(content) // 2]
+        s3_client.put_object(Bucket=bucket, Key=s3_key, Body=truncated_content)
+
+        # Download and verify hash mismatch
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/truncate-test",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+
+        downloaded_hash = compute_sha256(response.content)
+        assert downloaded_hash != expected_hash, "Truncation not detected"
+        assert len(response.content) < len(content), "Content was not truncated"
+
+        # Restore original
+        s3_client.put_object(Bucket=bucket, Key=s3_key, Body=content)
+
+    @pytest.mark.integration
+    def test_detection_of_appended_content(self, integration_client, test_package):
+        """Test detection of content with extra bytes appended."""
+        project, package = test_package
+        content = b"Original content"
+        expected_hash = compute_sha256(content)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="append-test"
+        )
+        assert result["artifact_id"] == expected_hash
+
+        # Get S3 object and append extra bytes
+        s3_client = get_s3_client()
+        bucket = get_s3_bucket()
+        s3_key = f"fruits/{expected_hash[:2]}/{expected_hash[2:4]}/{expected_hash}"
+
+        appended_content = content + b" - extra bytes appended"
+        s3_client.put_object(Bucket=bucket, Key=s3_key, Body=appended_content)
+
+        # Download and verify hash mismatch
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/append-test",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+
+        downloaded_hash = compute_sha256(response.content)
+        assert downloaded_hash != expected_hash, "Appended content not detected"
+        assert len(response.content) > len(content), "Content was not extended"
+
+        # Restore original
+        s3_client.put_object(Bucket=bucket, Key=s3_key, Body=content)
+
+    @pytest.mark.integration
+    def test_client_detects_hash_mismatch_post_download(
+        self, integration_client, test_package
+    ):
+        """Test that a client can detect hash mismatch after downloading corrupted content.
+
+        This simulates the full client verification workflow:
+        1. Download content
+        2. Get expected hash from header
+        3. Compute actual hash of content
+        4. Verify they match (or detect corruption)
+        """
+        project, package = test_package
+        content = b"Content for client-side corruption detection"
+        expected_hash = compute_sha256(content)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="client-detect"
+        )
+
+        # Corrupt the S3 object
+        s3_client = get_s3_client()
+        bucket = get_s3_bucket()
+        s3_key = f"fruits/{expected_hash[:2]}/{expected_hash[2:4]}/{expected_hash}"
+        corrupted = b"This is completely different content"
+        s3_client.put_object(Bucket=bucket, Key=s3_key, Body=corrupted)
+
+        # Simulate client download and verification
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/client-detect",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+
+        # Client gets expected hash from header
+        header_hash = response.headers.get("X-Checksum-SHA256")
+
+        # Client computes hash of downloaded content
+        actual_hash = compute_sha256(response.content)
+
+        # Client detects the mismatch
+        corruption_detected = actual_hash != header_hash
+        assert corruption_detected, "Client should detect hash mismatch"
+
+        # Restore original
+        s3_client.put_object(Bucket=bucket, Key=s3_key, Body=content)
+
+    @pytest.mark.integration
+    def test_consistency_check_detects_size_mismatch(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test that consistency check detects size mismatches.
+
+        Uploads content, modifies S3 object size, then runs consistency check.
+        """
+        project, package = test_package
+        content = b"Content for size mismatch consistency check test " + unique_test_id.encode()
+        expected_hash = compute_sha256(content)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="size-mismatch"
+        )
+
+        # Modify S3 object to have different size
+        s3_client = get_s3_client()
+        bucket = get_s3_bucket()
+        s3_key = f"fruits/{expected_hash[:2]}/{expected_hash[2:4]}/{expected_hash}"
+        different_size_content = content + b"extra extra extra"
+        s3_client.put_object(Bucket=bucket, Key=s3_key, Body=different_size_content)
+
+        # Run consistency check
+        response = integration_client.get("/api/v1/admin/consistency-check")
+        assert response.status_code == 200
+        data = response.json()
+
+        # Should detect the size mismatch
+        assert data["size_mismatches"] >= 1 or len(data["size_mismatch_artifacts"]) >= 1
+
+        # Restore original
+        s3_client.put_object(Bucket=bucket, Key=s3_key, Body=content)
+
+    @pytest.mark.integration
+    def test_consistency_check_detects_missing_s3_object(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test that consistency check detects missing S3 objects.
+
+        Uploads content, deletes S3 object, then runs consistency check.
+        """
+        project, package = test_package
+        content = b"Content for missing S3 object test " + unique_test_id.encode()
+        expected_hash = compute_sha256(content)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="missing-s3"
+        )
+
+        # Delete the S3 object
+        s3_client = get_s3_client()
+        bucket = get_s3_bucket()
+        s3_key = f"fruits/{expected_hash[:2]}/{expected_hash[2:4]}/{expected_hash}"
+        s3_client.delete_object(Bucket=bucket, Key=s3_key)
+
+        # Run consistency check
+        response = integration_client.get("/api/v1/admin/consistency-check")
+        assert response.status_code == 200
+        data = response.json()
+
+        # Should detect the missing S3 object
+        assert data["missing_s3_objects"] >= 1 or len(data["missing_s3_keys"]) >= 1
+
+        # Restore the object for cleanup
+        s3_client.put_object(Bucket=bucket, Key=s3_key, Body=content)

backend/tests/integration/test_large_uploads.py

@@ -0,0 +1,552 @@
+"""
+Integration tests for large file upload functionality.
+
+Tests cover:
+- Large file uploads (100MB, 1GB)
+- Multipart upload behavior
+- Upload metrics (duration, throughput)
+- Memory efficiency during uploads
+- Upload progress tracking
+
+Note: Large tests are marked with @pytest.mark.slow and will be skipped
+by default. Run with `pytest --run-slow` to include them.
+"""
+
+import os
+import pytest
+import io
+import time
+from tests.factories import (
+    compute_sha256,
+    upload_test_file,
+    s3_object_exists,
+)
+from tests.conftest import (
+    SIZE_1KB,
+    SIZE_100KB,
+    SIZE_1MB,
+    SIZE_10MB,
+    SIZE_100MB,
+    SIZE_1GB,
+)
+
+
+class TestUploadMetrics:
+    """Tests for upload duration and throughput metrics."""
+
+    @pytest.mark.integration
+    def test_upload_response_includes_duration_ms(self, integration_client, test_package):
+        """Test upload response includes duration_ms field."""
+        project, package = test_package
+        content = b"duration test content"
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="duration-test"
+        )
+
+        assert "duration_ms" in result
+        assert result["duration_ms"] is not None
+        assert result["duration_ms"] >= 0
+
+    @pytest.mark.integration
+    def test_upload_response_includes_throughput(self, integration_client, test_package):
+        """Test upload response includes throughput_mbps field."""
+        project, package = test_package
+        content = b"throughput test content"
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="throughput-test"
+        )
+
+        assert "throughput_mbps" in result
+        # For small files throughput may be very high or None
+        # Just verify the field exists
+
+    @pytest.mark.integration
+    def test_upload_duration_reasonable(
+        self, integration_client, test_package, sized_content
+    ):
+        """Test upload duration is reasonable for file size."""
+        project, package = test_package
+        content, _ = sized_content(SIZE_1MB, seed=100)
+
+        start = time.time()
+        result = upload_test_file(
+            integration_client, project, package, content, tag="duration-check"
+        )
+        actual_duration = (time.time() - start) * 1000  # ms
+
+        # Reported duration should be close to actual
+        assert result["duration_ms"] is not None
+        # Allow some variance (network overhead)
+        assert result["duration_ms"] <= actual_duration + 1000  # Within 1s
+
+
+class TestLargeFileUploads:
+    """Tests for large file uploads using multipart."""
+
+    @pytest.mark.integration
+    def test_upload_10mb_file(self, integration_client, test_package, sized_content):
+        """Test uploading a 10MB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_10MB, seed=200)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="large-10mb"
+        )
+
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_10MB
+        assert result["duration_ms"] is not None
+        assert result["throughput_mbps"] is not None
+
+    @pytest.mark.integration
+    @pytest.mark.slow
+    @pytest.mark.requires_direct_s3
+    def test_upload_100mb_file(self, integration_client, test_package, sized_content):
+        """Test uploading a 100MB file (triggers multipart upload)."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_100MB, seed=300)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="large-100mb"
+        )
+
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_100MB
+        # Verify S3 object exists
+        assert s3_object_exists(expected_hash)
+
+    @pytest.mark.integration
+    @pytest.mark.slow
+    @pytest.mark.large
+    def test_upload_1gb_file(self, integration_client, test_package, sized_content):
+        """Test uploading a 1GB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_1GB, seed=400)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="large-1gb"
+        )
+
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_1GB
+        # Should have measurable throughput
+        assert result["throughput_mbps"] is not None
+        assert result["throughput_mbps"] > 0
+
+    @pytest.mark.integration
+    def test_large_file_deduplication(
+        self, integration_client, test_package, sized_content, unique_test_id
+    ):
+        """Test deduplication works for large files."""
+        project, package = test_package
+        # Use unique_test_id to ensure unique content per test run
+        seed = hash(unique_test_id) % 10000
+        content, expected_hash = sized_content(SIZE_10MB, seed=seed)
+
+        # First upload
+        result1 = upload_test_file(
+            integration_client, project, package, content, tag=f"dedup-{unique_test_id}-1"
+        )
+        # Note: may be True if previous test uploaded same content
+        first_dedupe = result1["deduplicated"]
+
+        # Second upload of same content
+        result2 = upload_test_file(
+            integration_client, project, package, content, tag=f"dedup-{unique_test_id}-2"
+        )
+        assert result2["artifact_id"] == expected_hash
+        # Second upload MUST be deduplicated
+        assert result2["deduplicated"] is True
+
+
+class TestUploadProgress:
+    """Tests for upload progress tracking endpoint."""
+
+    @pytest.mark.integration
+    def test_progress_endpoint_returns_not_found_for_invalid_id(
+        self, integration_client, test_package
+    ):
+        """Test progress endpoint returns not_found status for invalid upload ID."""
+        project, package = test_package
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/upload/invalid-upload-id/progress"
+        )
+
+        assert response.status_code == 200
+        data = response.json()
+        assert data["status"] == "not_found"
+        assert data["upload_id"] == "invalid-upload-id"
+
+    @pytest.mark.integration
+    def test_progress_endpoint_requires_valid_project(
+        self, integration_client, unique_test_id
+    ):
+        """Test progress endpoint validates project exists."""
+        response = integration_client.get(
+            f"/api/v1/project/nonexistent-{unique_test_id}/pkg/upload/upload-id/progress"
+        )
+
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_progress_endpoint_requires_valid_package(
+        self, integration_client, test_project, unique_test_id
+    ):
+        """Test progress endpoint validates package exists."""
+        response = integration_client.get(
+            f"/api/v1/project/{test_project}/nonexistent-{unique_test_id}/upload/upload-id/progress"
+        )
+
+        assert response.status_code == 404
+
+
+class TestResumableUploadProgress:
+    """Tests for progress tracking during resumable uploads."""
+
+    @pytest.mark.integration
+    def test_resumable_upload_init_and_progress(
+        self, integration_client, test_package, sized_content
+    ):
+        """Test initializing resumable upload and checking progress."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_100KB, seed=600)
+
+        # Get API key for auth
+        api_key_response = integration_client.post(
+            "/api/v1/auth/keys",
+            json={"name": "progress-test-key"},
+        )
+        assert api_key_response.status_code == 200
+        api_key = api_key_response.json()["key"]
+
+        # Initialize resumable upload
+        init_response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload/init",
+            json={
+                "expected_hash": expected_hash,
+                "filename": "progress-test.bin",
+                "size": SIZE_100KB,
+            },
+            headers={"Authorization": f"Bearer {api_key}"},
+        )
+        assert init_response.status_code == 200
+        upload_id = init_response.json().get("upload_id")
+
+        if upload_id:
+            # Check initial progress
+            progress_response = integration_client.get(
+                f"/api/v1/project/{project}/{package}/upload/{upload_id}/progress",
+                headers={"Authorization": f"Bearer {api_key}"},
+            )
+            assert progress_response.status_code == 200
+            progress = progress_response.json()
+            assert progress["status"] == "in_progress"
+            assert progress["bytes_uploaded"] == 0
+            assert progress["bytes_total"] == SIZE_100KB
+
+            # Abort to clean up
+            integration_client.delete(
+                f"/api/v1/project/{project}/{package}/upload/{upload_id}",
+                headers={"Authorization": f"Bearer {api_key}"},
+            )
+
+
+class TestUploadSizeLimits:
+    """Tests for upload size limit enforcement."""
+
+    @pytest.mark.integration
+    def test_empty_file_rejected(self, integration_client, test_package):
+        """Test empty files are rejected."""
+        project, package = test_package
+
+        files = {"file": ("empty.txt", io.BytesIO(b""), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+        )
+
+        assert response.status_code in [400, 422]
+
+    @pytest.mark.integration
+    def test_minimum_size_accepted(self, integration_client, test_package):
+        """Test 1-byte file is accepted."""
+        project, package = test_package
+        content = b"X"
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="min-size"
+        )
+
+        assert result["size"] == 1
+
+    @pytest.mark.integration
+    def test_content_length_header_used_in_response(self, integration_client, test_package):
+        """Test that upload response size matches Content-Length."""
+        project, package = test_package
+        content = b"content length verification test"
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="content-length-test"
+        )
+
+        # Size in response should match actual content length
+        assert result["size"] == len(content)
+
+
+class TestUploadErrorHandling:
+    """Tests for upload error handling."""
+
+    @pytest.mark.integration
+    def test_upload_to_nonexistent_project_returns_404(
+        self, integration_client, unique_test_id
+    ):
+        """Test upload to nonexistent project returns 404."""
+        content = b"test content"
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+
+        response = integration_client.post(
+            f"/api/v1/project/nonexistent-{unique_test_id}/pkg/upload",
+            files=files,
+        )
+
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_upload_to_nonexistent_package_returns_404(
+        self, integration_client, test_project, unique_test_id
+    ):
+        """Test upload to nonexistent package returns 404."""
+        content = b"test content"
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+
+        response = integration_client.post(
+            f"/api/v1/project/{test_project}/nonexistent-{unique_test_id}/upload",
+            files=files,
+        )
+
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_upload_without_file_returns_422(self, integration_client, test_package):
+        """Test upload without file field returns 422."""
+        project, package = test_package
+
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            data={"tag": "no-file"},
+        )
+
+        assert response.status_code == 422
+
+    @pytest.mark.integration
+    def test_upload_with_invalid_checksum_rejected(
+        self, integration_client, test_package
+    ):
+        """Test upload with invalid checksum header format is rejected."""
+        project, package = test_package
+        content = b"checksum test"
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            headers={"X-Checksum-SHA256": "invalid-checksum"},
+        )
+
+        assert response.status_code == 400
+
+    @pytest.mark.integration
+    def test_upload_with_mismatched_checksum_rejected(
+        self, integration_client, test_package
+    ):
+        """Test upload with wrong checksum is rejected."""
+        project, package = test_package
+        content = b"mismatch test"
+        wrong_hash = "0" * 64
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            headers={"X-Checksum-SHA256": wrong_hash},
+        )
+
+        assert response.status_code == 422
+        assert "verification failed" in response.json().get("detail", "").lower()
+
+
+class TestResumableUploadCancellation:
+    """Tests for resumable upload cancellation."""
+
+    @pytest.mark.integration
+    def test_abort_resumable_upload(self, integration_client, test_package, sized_content):
+        """Test aborting a resumable upload cleans up properly."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_100KB, seed=700)
+
+        # Get API key for auth
+        api_key_response = integration_client.post(
+            "/api/v1/auth/keys",
+            json={"name": "abort-test-key"},
+        )
+        assert api_key_response.status_code == 200
+        api_key = api_key_response.json()["key"]
+
+        # Initialize resumable upload
+        init_response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload/init",
+            json={
+                "expected_hash": expected_hash,
+                "filename": "abort-test.bin",
+                "size": SIZE_100KB,
+            },
+            headers={"Authorization": f"Bearer {api_key}"},
+        )
+        assert init_response.status_code == 200
+        upload_id = init_response.json().get("upload_id")
+
+        if upload_id:
+            # Abort the upload (without uploading any parts)
+            abort_response = integration_client.delete(
+                f"/api/v1/project/{project}/{package}/upload/{upload_id}",
+                headers={"Authorization": f"Bearer {api_key}"},
+            )
+            assert abort_response.status_code in [200, 204]
+
+            # Verify progress shows not_found after abort
+            progress_response = integration_client.get(
+                f"/api/v1/project/{project}/{package}/upload/{upload_id}/progress",
+                headers={"Authorization": f"Bearer {api_key}"},
+            )
+            assert progress_response.status_code == 200
+            assert progress_response.json()["status"] == "not_found"
+
+    @pytest.mark.integration
+    def test_abort_nonexistent_upload(self, integration_client, test_package):
+        """Test aborting nonexistent upload returns appropriate error."""
+        project, package = test_package
+
+        # Get API key for auth
+        api_key_response = integration_client.post(
+            "/api/v1/auth/keys",
+            json={"name": "abort-nonexistent-key"},
+        )
+        assert api_key_response.status_code == 200
+        api_key = api_key_response.json()["key"]
+
+        response = integration_client.delete(
+            f"/api/v1/project/{project}/{package}/upload/nonexistent-upload-id",
+            headers={"Authorization": f"Bearer {api_key}"},
+        )
+
+        # Should return 404 or 200 (idempotent delete)
+        assert response.status_code in [200, 204, 404]
+
+
+class TestUploadTimeout:
+    """Tests for upload timeout handling."""
+
+    @pytest.mark.integration
+    def test_upload_with_short_timeout_succeeds_for_small_file(
+        self, integration_client, test_package
+    ):
+        """Test small file upload succeeds with reasonable timeout."""
+        project, package = test_package
+        content = b"small timeout test"
+
+        # httpx client should handle this quickly
+        result = upload_test_file(
+            integration_client, project, package, content, tag="timeout-small"
+        )
+
+        assert result["artifact_id"] is not None
+
+    @pytest.mark.integration
+    def test_upload_response_duration_under_timeout(
+        self, integration_client, test_package, sized_content
+    ):
+        """Test upload completes within reasonable time."""
+        project, package = test_package
+        content, _ = sized_content(SIZE_1MB, seed=800)
+
+        start = time.time()
+        result = upload_test_file(
+            integration_client, project, package, content, tag="timeout-check"
+        )
+        duration = time.time() - start
+
+        # 1MB should upload in well under 60 seconds on local
+        assert duration < 60
+        assert result["artifact_id"] is not None
+
+
+class TestConcurrentUploads:
+    """Tests for concurrent upload handling."""
+
+    @pytest.mark.integration
+    def test_concurrent_different_files(
+        self, integration_client, test_package, sized_content
+    ):
+        """Test concurrent uploads of different files succeed."""
+        from concurrent.futures import ThreadPoolExecutor, as_completed
+
+        project, package = test_package
+
+        # Get API key for auth
+        api_key_response = integration_client.post(
+            "/api/v1/auth/keys",
+            json={"name": "concurrent-diff-key"},
+        )
+        assert api_key_response.status_code == 200
+        api_key = api_key_response.json()["key"]
+
+        num_uploads = 3
+        results = []
+        errors = []
+
+        def upload_unique_file(idx):
+            try:
+                from httpx import Client
+
+                content, expected_hash = sized_content(SIZE_100KB, seed=900 + idx)
+
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+                with Client(base_url=base_url, timeout=30.0) as client:
+                    files = {
+                        "file": (
+                            f"concurrent-{idx}.bin",
+                            io.BytesIO(content),
+                            "application/octet-stream",
+                        )
+                    }
+                    response = client.post(
+                        f"/api/v1/project/{project}/{package}/upload",
+                        files=files,
+                        data={"tag": f"concurrent-diff-{idx}"},
+                        headers={"Authorization": f"Bearer {api_key}"},
+                    )
+                    if response.status_code == 200:
+                        results.append((idx, response.json(), expected_hash))
+                    else:
+                        errors.append(f"Upload {idx}: {response.status_code} - {response.text}")
+            except Exception as e:
+                errors.append(f"Upload {idx}: {str(e)}")
+
+        with ThreadPoolExecutor(max_workers=num_uploads) as executor:
+            futures = [executor.submit(upload_unique_file, i) for i in range(num_uploads)]
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Concurrent upload errors: {errors}"
+        assert len(results) == num_uploads
+
+        # Each upload should have unique artifact ID
+        artifact_ids = set(r[1]["artifact_id"] for r in results)
+        assert len(artifact_ids) == num_uploads
+
+        # Each should match expected hash
+        for idx, result, expected_hash in results:
+            assert result["artifact_id"] == expected_hash

backend/tests/integration/test_packages_api.py

@@ -0,0 +1,345 @@
+"""
+Integration tests for package API endpoints.
+
+Tests cover:
+- Package CRUD operations
+- Package listing with pagination, search, filtering
+- Package stats endpoint
+- Package-level audit logs
+- Cascade delete behavior
+"""
+
+import pytest
+from tests.factories import compute_sha256, upload_test_file
+
+
+class TestPackageCRUD:
+    """Tests for package create, read, update, delete operations."""
+
+    @pytest.mark.integration
+    def test_create_package(self, integration_client, test_project, unique_test_id):
+        """Test creating a new package."""
+        package_name = f"test-create-pkg-{unique_test_id}"
+
+        response = integration_client.post(
+            f"/api/v1/project/{test_project}/packages",
+            json={
+                "name": package_name,
+                "description": "Test package",
+                "format": "npm",
+                "platform": "linux",
+            },
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert data["name"] == package_name
+        assert data["description"] == "Test package"
+        assert data["format"] == "npm"
+        assert data["platform"] == "linux"
+
+    @pytest.mark.integration
+    def test_get_package(self, integration_client, test_package):
+        """Test getting a package by name."""
+        project_name, package_name = test_package
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/packages/{package_name}"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert data["name"] == package_name
+
+    @pytest.mark.integration
+    def test_get_nonexistent_package(self, integration_client, test_project):
+        """Test getting a non-existent package returns 404."""
+        response = integration_client.get(
+            f"/api/v1/project/{test_project}/packages/nonexistent-pkg"
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_list_packages(self, integration_client, test_package):
+        """Test listing packages includes created package."""
+        project_name, package_name = test_package
+
+        response = integration_client.get(f"/api/v1/project/{project_name}/packages")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "items" in data
+        assert "pagination" in data
+
+        package_names = [p["name"] for p in data["items"]]
+        assert package_name in package_names
+
+    @pytest.mark.integration
+    def test_delete_package(self, integration_client, test_project, unique_test_id):
+        """Test deleting a package."""
+        package_name = f"test-delete-pkg-{unique_test_id}"
+
+        # Create package
+        integration_client.post(
+            f"/api/v1/project/{test_project}/packages",
+            json={"name": package_name, "description": "To be deleted"},
+        )
+
+        # Delete package
+        response = integration_client.delete(
+            f"/api/v1/project/{test_project}/packages/{package_name}"
+        )
+        assert response.status_code == 204
+
+        # Verify deleted
+        response = integration_client.get(
+            f"/api/v1/project/{test_project}/packages/{package_name}"
+        )
+        assert response.status_code == 404
+
+
+class TestPackageListingFilters:
+    """Tests for package listing with filters and pagination."""
+
+    @pytest.mark.integration
+    def test_packages_pagination(self, integration_client, test_project):
+        """Test package listing respects pagination parameters."""
+        response = integration_client.get(
+            f"/api/v1/project/{test_project}/packages?page=1&limit=5"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert len(data["items"]) <= 5
+        assert data["pagination"]["limit"] == 5
+        assert data["pagination"]["page"] == 1
+
+    @pytest.mark.integration
+    def test_packages_filter_by_format(
+        self, integration_client, test_project, unique_test_id
+    ):
+        """Test package filtering by format."""
+        # Create a package with specific format
+        package_name = f"npm-pkg-{unique_test_id}"
+        integration_client.post(
+            f"/api/v1/project/{test_project}/packages",
+            json={"name": package_name, "format": "npm"},
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{test_project}/packages?format=npm"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        for pkg in data["items"]:
+            assert pkg["format"] == "npm"
+
+    @pytest.mark.integration
+    def test_packages_filter_by_platform(
+        self, integration_client, test_project, unique_test_id
+    ):
+        """Test package filtering by platform."""
+        # Create a package with specific platform
+        package_name = f"linux-pkg-{unique_test_id}"
+        integration_client.post(
+            f"/api/v1/project/{test_project}/packages",
+            json={"name": package_name, "platform": "linux"},
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{test_project}/packages?platform=linux"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        for pkg in data["items"]:
+            assert pkg["platform"] == "linux"
+
+
+class TestPackageStats:
+    """Tests for package statistics endpoint."""
+
+    @pytest.mark.integration
+    def test_package_stats_returns_valid_response(
+        self, integration_client, test_package
+    ):
+        """Test package stats endpoint returns expected fields."""
+        project, package = test_package
+        response = integration_client.get(
+            f"/api/v1/project/{project}/packages/{package}/stats"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "package_id" in data
+        assert "package_name" in data
+        assert "project_name" in data
+        assert "tag_count" in data
+        assert "artifact_count" in data
+        assert "total_size_bytes" in data
+        assert "upload_count" in data
+        assert "deduplicated_uploads" in data
+        assert "storage_saved_bytes" in data
+        assert "deduplication_ratio" in data
+
+    @pytest.mark.integration
+    def test_package_stats_not_found(self, integration_client, test_project):
+        """Test package stats returns 404 for non-existent package."""
+        response = integration_client.get(
+            f"/api/v1/project/{test_project}/packages/nonexistent-package/stats"
+        )
+        assert response.status_code == 404
+
+
+class TestPackageAuditLogs:
+    """Tests for package-level audit logs endpoint."""
+
+    @pytest.mark.integration
+    def test_package_audit_logs_returns_200(self, integration_client, test_package):
+        """Test package audit logs endpoint returns 200."""
+        project_name, package_name = test_package
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/audit-logs"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "items" in data
+        assert "pagination" in data
+
+    @pytest.mark.integration
+    def test_package_audit_logs_project_not_found(self, integration_client):
+        """Test non-existent project returns 404."""
+        response = integration_client.get(
+            "/api/v1/project/nonexistent/nonexistent/audit-logs"
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_package_audit_logs_package_not_found(
+        self, integration_client, test_project
+    ):
+        """Test non-existent package returns 404."""
+        response = integration_client.get(
+            f"/api/v1/project/{test_project}/nonexistent-package/audit-logs"
+        )
+        assert response.status_code == 404
+
+
+class TestPackageCascadeDelete:
+    """Tests for cascade delete behavior when deleting packages."""
+
+    @pytest.mark.integration
+    def test_ref_count_decrements_on_package_delete(
+        self, integration_client, unique_test_id
+    ):
+        """Test ref_count decrements for all tags when package is deleted."""
+        project_name = f"cascade-pkg-{unique_test_id}"
+        package_name = f"test-pkg-{unique_test_id}"
+
+        # Create project
+        response = integration_client.post(
+            "/api/v1/projects",
+            json={
+                "name": project_name,
+                "description": "Test project",
+                "is_public": True,
+            },
+        )
+        assert response.status_code == 200
+
+        # Create package
+        response = integration_client.post(
+            f"/api/v1/project/{project_name}/packages",
+            json={"name": package_name, "description": "Test package"},
+        )
+        assert response.status_code == 200
+
+        # Upload content with multiple tags
+        content = f"cascade delete test {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(
+            integration_client, project_name, package_name, content, tag="v1"
+        )
+        upload_test_file(
+            integration_client, project_name, package_name, content, tag="v2"
+        )
+        upload_test_file(
+            integration_client, project_name, package_name, content, tag="v3"
+        )
+
+        # Verify ref_count is 3
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.json()["ref_count"] == 3
+
+        # Delete the package
+        delete_response = integration_client.delete(
+            f"/api/v1/project/{project_name}/packages/{package_name}"
+        )
+        assert delete_response.status_code == 204
+
+        # Verify ref_count is 0
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.json()["ref_count"] == 0
+
+        # Cleanup
+        integration_client.delete(f"/api/v1/projects/{project_name}")
+
+
+class TestPackageUploads:
+    """Tests for package-level uploads endpoint."""
+
+    @pytest.mark.integration
+    def test_package_uploads_returns_200(self, integration_client, test_package):
+        """Test package uploads endpoint returns 200."""
+        project_name, package_name = test_package
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/uploads"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "items" in data
+        assert "pagination" in data
+
+    @pytest.mark.integration
+    def test_package_uploads_after_upload(self, integration_client, test_package):
+        """Test uploads are recorded after file upload."""
+        project_name, package_name = test_package
+
+        # Upload a file
+        upload_result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"test upload content",
+            "test.txt",
+        )
+        assert upload_result["artifact_id"]
+
+        # Check uploads endpoint
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/uploads"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert len(data["items"]) >= 1
+
+        # Verify upload record fields
+        upload = data["items"][0]
+        assert "artifact_id" in upload
+        assert "package_name" in upload
+        assert "project_name" in upload
+        assert "uploaded_at" in upload
+        assert "uploaded_by" in upload
+
+    @pytest.mark.integration
+    def test_package_uploads_project_not_found(self, integration_client):
+        """Test non-existent project returns 404."""
+        response = integration_client.get(
+            "/api/v1/project/nonexistent/nonexistent/uploads"
+        )
+        assert response.status_code == 404

backend/tests/integration/test_projects_api.py

@@ -0,0 +1,325 @@
+"""
+Integration tests for project API endpoints.
+
+Tests cover:
+- Project CRUD operations
+- Project listing with pagination, search, and sorting
+- Project stats endpoint
+- Project-level audit logs
+- Cascade delete behavior
+"""
+
+import pytest
+from tests.factories import compute_sha256, upload_test_file
+
+
+class TestProjectCRUD:
+    """Tests for project create, read, update, delete operations."""
+
+    @pytest.mark.integration
+    def test_create_project(self, integration_client, unique_test_id):
+        """Test creating a new project."""
+        project_name = f"test-create-{unique_test_id}"
+
+        try:
+            response = integration_client.post(
+                "/api/v1/projects",
+                json={
+                    "name": project_name,
+                    "description": "Test project",
+                    "is_public": True,
+                },
+            )
+            assert response.status_code == 200
+
+            data = response.json()
+            assert data["name"] == project_name
+            assert data["description"] == "Test project"
+            assert data["is_public"] is True
+            assert "id" in data
+            assert "created_at" in data
+        finally:
+            integration_client.delete(f"/api/v1/projects/{project_name}")
+
+    @pytest.mark.integration
+    def test_get_project(self, integration_client, test_project):
+        """Test getting a project by name."""
+        response = integration_client.get(f"/api/v1/projects/{test_project}")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert data["name"] == test_project
+
+    @pytest.mark.integration
+    def test_get_nonexistent_project(self, integration_client):
+        """Test getting a non-existent project returns 404."""
+        response = integration_client.get("/api/v1/projects/nonexistent-project-xyz")
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_list_projects(self, integration_client, test_project):
+        """Test listing projects includes created project."""
+        # Search specifically for our test project to avoid pagination issues
+        response = integration_client.get(f"/api/v1/projects?search={test_project}")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "items" in data
+        assert "pagination" in data
+
+        project_names = [p["name"] for p in data["items"]]
+        assert test_project in project_names
+
+    @pytest.mark.integration
+    def test_delete_project(self, integration_client, unique_test_id):
+        """Test deleting a project."""
+        project_name = f"test-delete-{unique_test_id}"
+
+        # Create project
+        integration_client.post(
+            "/api/v1/projects",
+            json={"name": project_name, "description": "To be deleted"},
+        )
+
+        # Delete project
+        response = integration_client.delete(f"/api/v1/projects/{project_name}")
+        assert response.status_code == 204
+
+        # Verify deleted
+        response = integration_client.get(f"/api/v1/projects/{project_name}")
+        assert response.status_code == 404
+
+
+class TestProjectListingFilters:
+    """Tests for project listing with filters and pagination."""
+
+    @pytest.mark.integration
+    def test_projects_pagination(self, integration_client):
+        """Test project listing respects pagination parameters."""
+        response = integration_client.get("/api/v1/projects?page=1&limit=5")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert len(data["items"]) <= 5
+        assert data["pagination"]["limit"] == 5
+        assert data["pagination"]["page"] == 1
+        assert "has_more" in data["pagination"]
+
+    @pytest.mark.integration
+    def test_projects_search(self, integration_client, test_project):
+        """Test project search by name."""
+        # Search using the unique portion of our test project name
+        # test_project format is "test-project-test-{uuid[:8]}"
+        unique_part = test_project.split("-")[-1]  # Get the UUID portion
+        response = integration_client.get(
+            f"/api/v1/projects?search={unique_part}"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        # Our project should be in results
+        project_names = [p["name"] for p in data["items"]]
+        assert test_project in project_names
+
+    @pytest.mark.integration
+    def test_projects_sort_by_name(self, integration_client):
+        """Test project sorting by name."""
+        response = integration_client.get("/api/v1/projects?sort=name&order=asc")
+        assert response.status_code == 200
+
+        data = response.json()
+        names = [p["name"] for p in data["items"]]
+        assert names == sorted(names)
+
+
+class TestProjectStats:
+    """Tests for project statistics endpoint."""
+
+    @pytest.mark.integration
+    def test_project_stats_returns_valid_response(
+        self, integration_client, test_project
+    ):
+        """Test project stats endpoint returns expected fields."""
+        response = integration_client.get(f"/api/v1/projects/{test_project}/stats")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "project_id" in data
+        assert "project_name" in data
+        assert "package_count" in data
+        assert "tag_count" in data
+        assert "artifact_count" in data
+        assert "total_size_bytes" in data
+        assert "upload_count" in data
+        assert "deduplicated_uploads" in data
+        assert "storage_saved_bytes" in data
+        assert "deduplication_ratio" in data
+
+    @pytest.mark.integration
+    def test_project_stats_not_found(self, integration_client):
+        """Test project stats returns 404 for non-existent project."""
+        response = integration_client.get("/api/v1/projects/nonexistent-project/stats")
+        assert response.status_code == 404
+
+
+class TestProjectAuditLogs:
+    """Tests for project-level audit logs endpoint."""
+
+    @pytest.mark.integration
+    def test_project_audit_logs_returns_200(self, integration_client, test_project):
+        """Test project audit logs endpoint returns 200."""
+        response = integration_client.get(f"/api/v1/projects/{test_project}/audit-logs")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "items" in data
+        assert "pagination" in data
+
+    @pytest.mark.integration
+    def test_project_audit_logs_not_found(self, integration_client):
+        """Test non-existent project returns 404."""
+        response = integration_client.get(
+            "/api/v1/projects/nonexistent-project/audit-logs"
+        )
+        assert response.status_code == 404
+
+
+class TestProjectCascadeDelete:
+    """Tests for cascade delete behavior when deleting projects."""
+
+    @pytest.mark.integration
+    def test_project_delete_cascades_to_packages(
+        self, integration_client, unique_test_id
+    ):
+        """Test deleting project cascades to packages."""
+        project_name = f"cascade-proj-{unique_test_id}"
+        package_name = f"cascade-pkg-{unique_test_id}"
+
+        try:
+            # Create project and package
+            integration_client.post(
+                "/api/v1/projects",
+                json={"name": project_name, "description": "Test", "is_public": True},
+            )
+            integration_client.post(
+                f"/api/v1/project/{project_name}/packages",
+                json={"name": package_name, "description": "Test package"},
+            )
+
+            # Verify package exists
+            response = integration_client.get(
+                f"/api/v1/project/{project_name}/packages/{package_name}"
+            )
+            assert response.status_code == 200
+
+            # Delete project
+            integration_client.delete(f"/api/v1/projects/{project_name}")
+
+            # Verify project is deleted (and package with it)
+            response = integration_client.get(f"/api/v1/projects/{project_name}")
+            assert response.status_code == 404
+        except Exception:
+            # Cleanup if test fails
+            integration_client.delete(f"/api/v1/projects/{project_name}")
+            raise
+
+    @pytest.mark.integration
+    def test_ref_count_decrements_on_project_delete(
+        self, integration_client, unique_test_id
+    ):
+        """Test ref_count decrements for all tags when project is deleted."""
+        project_name = f"cascade-proj-{unique_test_id}"
+        package1_name = f"pkg1-{unique_test_id}"
+        package2_name = f"pkg2-{unique_test_id}"
+
+        # Create project
+        response = integration_client.post(
+            "/api/v1/projects",
+            json={
+                "name": project_name,
+                "description": "Test project",
+                "is_public": True,
+            },
+        )
+        assert response.status_code == 200
+
+        # Create two packages
+        for pkg_name in [package1_name, package2_name]:
+            response = integration_client.post(
+                f"/api/v1/project/{project_name}/packages",
+                json={"name": pkg_name, "description": "Test package"},
+            )
+            assert response.status_code == 200
+
+        # Upload same content with tags in both packages
+        content = f"project cascade test {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(
+            integration_client, project_name, package1_name, content, tag="v1"
+        )
+        upload_test_file(
+            integration_client, project_name, package1_name, content, tag="v2"
+        )
+        upload_test_file(
+            integration_client, project_name, package2_name, content, tag="latest"
+        )
+        upload_test_file(
+            integration_client, project_name, package2_name, content, tag="stable"
+        )
+
+        # Verify ref_count is 4 (2 tags in each of 2 packages)
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.json()["ref_count"] == 4
+
+        # Delete the project
+        delete_response = integration_client.delete(f"/api/v1/projects/{project_name}")
+        assert delete_response.status_code == 204
+
+        # Verify ref_count is 0
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.json()["ref_count"] == 0
+
+
+class TestProjectUploads:
+    """Tests for project-level uploads endpoint."""
+
+    @pytest.mark.integration
+    def test_project_uploads_returns_200(self, integration_client, test_project):
+        """Test project uploads endpoint returns 200."""
+        response = integration_client.get(f"/api/v1/project/{test_project}/uploads")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "items" in data
+        assert "pagination" in data
+
+    @pytest.mark.integration
+    def test_project_uploads_after_upload(self, integration_client, test_package):
+        """Test uploads are recorded in project uploads."""
+        project_name, package_name = test_package
+
+        # Upload a file
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"project uploads test",
+            "project.txt",
+        )
+
+        response = integration_client.get(f"/api/v1/project/{project_name}/uploads")
+        assert response.status_code == 200
+
+        data = response.json()
+        assert len(data["items"]) >= 1
+
+        # Verify project name matches
+        for item in data["items"]:
+            assert item["project_name"] == project_name
+
+    @pytest.mark.integration
+    def test_project_uploads_not_found(self, integration_client):
+        """Test non-existent project returns 404."""
+        response = integration_client.get("/api/v1/project/nonexistent/uploads")
+        assert response.status_code == 404

backend/tests/integration/test_size_boundary.py

@@ -0,0 +1,583 @@
+"""
+Integration tests for upload/download with various file sizes.
+
+Tests cover:
+- Small files (0B - 100KB)
+- Medium files (1MB - 50MB)
+- Large files (100MB - 1GB) - marked as slow/large
+- Exact chunk boundaries
+- Data integrity verification across all sizes
+"""
+
+import pytest
+import io
+import time
+from concurrent.futures import ThreadPoolExecutor, as_completed
+from tests.factories import (
+    compute_sha256,
+    upload_test_file,
+    generate_content,
+    generate_content_with_hash,
+)
+from tests.conftest import (
+    SIZE_1B,
+    SIZE_1KB,
+    SIZE_10KB,
+    SIZE_100KB,
+    SIZE_1MB,
+    SIZE_5MB,
+    SIZE_10MB,
+    SIZE_50MB,
+    SIZE_100MB,
+    SIZE_250MB,
+    SIZE_500MB,
+    SIZE_1GB,
+    CHUNK_SIZE,
+    MULTIPART_THRESHOLD,
+)
+
+
+class TestSmallFileSizes:
+    """Tests for small file uploads/downloads (0B - 100KB)."""
+
+    @pytest.mark.integration
+    def test_upload_download_1_byte(self, integration_client, test_package, sized_content):
+        """Test upload/download of 1 byte file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_1B, seed=1)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="1byte.bin", tag="1byte"
+        )
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_1B
+
+        # Download and verify
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/1byte",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+        assert len(response.content) == SIZE_1B
+
+    @pytest.mark.integration
+    def test_upload_download_1kb(self, integration_client, test_package, sized_content):
+        """Test upload/download of 1KB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_1KB, seed=2)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="1kb.bin", tag="1kb"
+        )
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_1KB
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/1kb",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+    @pytest.mark.integration
+    def test_upload_download_10kb(self, integration_client, test_package, sized_content):
+        """Test upload/download of 10KB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_10KB, seed=3)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="10kb.bin", tag="10kb"
+        )
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_10KB
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/10kb",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+    @pytest.mark.integration
+    def test_upload_download_100kb(self, integration_client, test_package, sized_content):
+        """Test upload/download of 100KB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_100KB, seed=4)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="100kb.bin", tag="100kb"
+        )
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_100KB
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/100kb",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+
+class TestMediumFileSizes:
+    """Tests for medium file uploads/downloads (1MB - 50MB)."""
+
+    @pytest.mark.integration
+    def test_upload_download_1mb(self, integration_client, test_package, sized_content):
+        """Test upload/download of 1MB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_1MB, seed=10)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="1mb.bin", tag="1mb"
+        )
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_1MB
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/1mb",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert len(response.content) == SIZE_1MB
+        assert compute_sha256(response.content) == expected_hash
+
+    @pytest.mark.integration
+    def test_upload_download_5mb(self, integration_client, test_package, sized_content):
+        """Test upload/download of 5MB file (multipart threshold boundary area)."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_5MB, seed=11)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="5mb.bin", tag="5mb"
+        )
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_5MB
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/5mb",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert len(response.content) == SIZE_5MB
+        assert compute_sha256(response.content) == expected_hash
+
+    @pytest.mark.integration
+    @pytest.mark.slow
+    def test_upload_download_10mb(self, integration_client, test_package, sized_content):
+        """Test upload/download of 10MB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_10MB, seed=12)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="10mb.bin", tag="10mb"
+        )
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_10MB
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/10mb",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert len(response.content) == SIZE_10MB
+        assert compute_sha256(response.content) == expected_hash
+
+    @pytest.mark.integration
+    @pytest.mark.slow
+    def test_upload_download_50mb(self, integration_client, test_package, sized_content):
+        """Test upload/download of 50MB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_50MB, seed=13)
+
+        start_time = time.time()
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="50mb.bin", tag="50mb"
+        )
+        upload_time = time.time() - start_time
+
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_50MB
+
+        start_time = time.time()
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/50mb",
+            params={"mode": "proxy"},
+        )
+        download_time = time.time() - start_time
+
+        assert response.status_code == 200
+        assert len(response.content) == SIZE_50MB
+        assert compute_sha256(response.content) == expected_hash
+
+        # Log timing for performance tracking
+        print(f"\n50MB upload: {upload_time:.2f}s, download: {download_time:.2f}s")
+
+
+class TestLargeFileSizes:
+    """Tests for large file uploads/downloads (100MB - 1GB).
+
+    These tests are marked as slow and large, skipped by default.
+    Run with: pytest -m "large" to include these tests.
+    """
+
+    @pytest.mark.integration
+    @pytest.mark.slow
+    @pytest.mark.large
+    def test_upload_download_100mb(self, integration_client, test_package, sized_content):
+        """Test upload/download of 100MB file (multipart threshold)."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_100MB, seed=100)
+
+        start_time = time.time()
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="100mb.bin", tag="100mb"
+        )
+        upload_time = time.time() - start_time
+
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_100MB
+
+        start_time = time.time()
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/100mb",
+            params={"mode": "proxy"},
+        )
+        download_time = time.time() - start_time
+
+        assert response.status_code == 200
+        assert len(response.content) == SIZE_100MB
+        assert compute_sha256(response.content) == expected_hash
+
+        print(f"\n100MB upload: {upload_time:.2f}s, download: {download_time:.2f}s")
+
+    @pytest.mark.integration
+    @pytest.mark.slow
+    @pytest.mark.large
+    def test_upload_download_250mb(self, integration_client, test_package, sized_content):
+        """Test upload/download of 250MB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_250MB, seed=250)
+
+        start_time = time.time()
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="250mb.bin", tag="250mb"
+        )
+        upload_time = time.time() - start_time
+
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_250MB
+
+        start_time = time.time()
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/250mb",
+            params={"mode": "proxy"},
+        )
+        download_time = time.time() - start_time
+
+        assert response.status_code == 200
+        assert len(response.content) == SIZE_250MB
+        assert compute_sha256(response.content) == expected_hash
+
+        print(f"\n250MB upload: {upload_time:.2f}s, download: {download_time:.2f}s")
+
+    @pytest.mark.integration
+    @pytest.mark.slow
+    @pytest.mark.large
+    def test_upload_download_500mb(self, integration_client, test_package, sized_content):
+        """Test upload/download of 500MB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_500MB, seed=500)
+
+        start_time = time.time()
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="500mb.bin", tag="500mb"
+        )
+        upload_time = time.time() - start_time
+
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_500MB
+
+        start_time = time.time()
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/500mb",
+            params={"mode": "proxy"},
+        )
+        download_time = time.time() - start_time
+
+        assert response.status_code == 200
+        assert len(response.content) == SIZE_500MB
+        assert compute_sha256(response.content) == expected_hash
+
+        print(f"\n500MB upload: {upload_time:.2f}s, download: {download_time:.2f}s")
+
+    @pytest.mark.integration
+    @pytest.mark.slow
+    @pytest.mark.large
+    def test_upload_download_1gb(self, integration_client, test_package, sized_content):
+        """Test upload/download of 1GB file.
+
+        This test may take several minutes depending on network/disk speed.
+        """
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_1GB, seed=1024)
+
+        start_time = time.time()
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="1gb.bin", tag="1gb"
+        )
+        upload_time = time.time() - start_time
+
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == SIZE_1GB
+
+        start_time = time.time()
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/1gb",
+            params={"mode": "proxy"},
+        )
+        download_time = time.time() - start_time
+
+        assert response.status_code == 200
+        assert len(response.content) == SIZE_1GB
+        assert compute_sha256(response.content) == expected_hash
+
+        print(f"\n1GB upload: {upload_time:.2f}s, download: {download_time:.2f}s")
+
+
+class TestChunkBoundaries:
+    """Tests for exact chunk size boundaries."""
+
+    @pytest.mark.integration
+    def test_upload_download_at_chunk_size(self, integration_client, test_package, sized_content):
+        """Test upload/download at exact chunk size (64KB)."""
+        project, package = test_package
+        content, expected_hash = sized_content(CHUNK_SIZE, seed=64)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="chunk.bin", tag="chunk-exact"
+        )
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == CHUNK_SIZE
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/chunk-exact",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+    @pytest.mark.integration
+    def test_upload_download_chunk_size_plus_1(self, integration_client, test_package, sized_content):
+        """Test upload/download at chunk size + 1 byte."""
+        project, package = test_package
+        size = CHUNK_SIZE + 1
+        content, expected_hash = sized_content(size, seed=65)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="chunk_plus.bin", tag="chunk-plus"
+        )
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == size
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/chunk-plus",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+    @pytest.mark.integration
+    def test_upload_download_chunk_size_minus_1(self, integration_client, test_package, sized_content):
+        """Test upload/download at chunk size - 1 byte."""
+        project, package = test_package
+        size = CHUNK_SIZE - 1
+        content, expected_hash = sized_content(size, seed=63)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="chunk_minus.bin", tag="chunk-minus"
+        )
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == size
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/chunk-minus",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+    @pytest.mark.integration
+    def test_upload_download_multiple_chunks(self, integration_client, test_package, sized_content):
+        """Test upload/download spanning multiple chunks."""
+        project, package = test_package
+        size = CHUNK_SIZE * 3 + 1000  # 3 full chunks + partial
+        content, expected_hash = sized_content(size, seed=300)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="multi_chunk.bin", tag="multi-chunk"
+        )
+        assert result["artifact_id"] == expected_hash
+        assert result["size"] == size
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/multi-chunk",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+
+class TestDataIntegrity:
+    """Tests for data integrity with various content types."""
+
+    @pytest.mark.integration
+    def test_binary_content_integrity(self, integration_client, test_package):
+        """Test binary content (all byte values 0-255) integrity."""
+        project, package = test_package
+        # Content with all 256 possible byte values
+        content = bytes(range(256)) * 100  # 25.6KB
+        expected_hash = compute_sha256(content)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="binary.bin", tag="binary"
+        )
+        assert result["artifact_id"] == expected_hash
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/binary",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+    @pytest.mark.integration
+    def test_text_content_integrity(self, integration_client, test_package):
+        """Test UTF-8 text content integrity."""
+        project, package = test_package
+        content = "Hello, World! 你好世界 🌍 مرحبا العالم".encode("utf-8")
+        expected_hash = compute_sha256(content)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="text.txt", tag="text"
+        )
+        assert result["artifact_id"] == expected_hash
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/text",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+        assert response.content.decode("utf-8") == "Hello, World! 你好世界 🌍 مرحبا العالم"
+
+    @pytest.mark.integration
+    def test_null_bytes_content_integrity(self, integration_client, test_package):
+        """Test content with null bytes."""
+        project, package = test_package
+        content = b"before\x00null\x00bytes\x00after"
+        expected_hash = compute_sha256(content)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="nulls.bin", tag="nulls"
+        )
+        assert result["artifact_id"] == expected_hash
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/nulls",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+        assert b"\x00" in response.content
+
+    @pytest.mark.integration
+    def test_unicode_filename_integrity(self, integration_client, test_package):
+        """Test file with unicode filename."""
+        project, package = test_package
+        content = b"unicode filename test"
+        expected_hash = compute_sha256(content)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="文件名.txt", tag="unicode-name"
+        )
+        assert result["artifact_id"] == expected_hash
+        assert result["original_name"] == "文件名.txt"
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/unicode-name",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+    @pytest.mark.integration
+    def test_compressed_content_integrity(self, integration_client, test_package):
+        """Test gzip-compressed content integrity."""
+        import gzip
+
+        project, package = test_package
+        original = b"This is some text that will be compressed " * 100
+        content = gzip.compress(original)
+        expected_hash = compute_sha256(content)
+
+        result = upload_test_file(
+            integration_client, project, package, content,
+            filename="data.gz", tag="compressed"
+        )
+        assert result["artifact_id"] == expected_hash
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/compressed",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+        # Verify we can decompress
+        assert gzip.decompress(response.content) == original
+
+    @pytest.mark.integration
+    def test_hash_verification_matches(self, integration_client, test_package, sized_content):
+        """Test that computed hash matches artifact_id for various sizes."""
+        project, package = test_package
+
+        sizes = [SIZE_1B, SIZE_1KB, SIZE_10KB, SIZE_100KB, SIZE_1MB]
+
+        for i, size in enumerate(sizes):
+            content, expected_hash = sized_content(size, seed=1000 + i)
+
+            result = upload_test_file(
+                integration_client, project, package, content,
+                filename=f"hash_test_{size}.bin", tag=f"hash-{size}"
+            )
+
+            # Verify artifact_id matches expected hash
+            assert result["artifact_id"] == expected_hash
+
+            # Download and verify hash of downloaded content
+            response = integration_client.get(
+                f"/api/v1/project/{project}/{package}/+/hash-{size}",
+                params={"mode": "proxy"},
+            )
+            downloaded_hash = compute_sha256(response.content)
+            assert downloaded_hash == expected_hash

backend/tests/integration/test_streaming_download.py

@@ -0,0 +1,535 @@
+"""
+Integration tests for streaming download functionality.
+
+Tests cover:
+- HTTP Range requests (partial downloads, resume)
+- Conditional requests (If-None-Match, If-Modified-Since)
+- Caching headers (Cache-Control, Last-Modified, Accept-Ranges)
+- Large file streaming
+- Download modes (proxy, redirect, presigned)
+"""
+
+import pytest
+import io
+import time
+from email.utils import formatdate
+from tests.factories import (
+    compute_sha256,
+    upload_test_file,
+)
+from tests.conftest import (
+    SIZE_1KB,
+    SIZE_100KB,
+    SIZE_1MB,
+)
+
+
+class TestRangeRequests:
+    """Tests for HTTP Range request support (partial downloads)."""
+
+    @pytest.mark.integration
+    def test_range_request_first_bytes(self, integration_client, test_package):
+        """Test range request for first N bytes."""
+        project, package = test_package
+        content = b"0123456789" * 100  # 1000 bytes
+        upload_test_file(integration_client, project, package, content, tag="range-test")
+
+        # Request first 10 bytes
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/range-test",
+            params={"mode": "proxy"},
+            headers={"Range": "bytes=0-9"},
+        )
+        assert response.status_code == 206  # Partial Content
+        assert response.content == b"0123456789"
+        assert "Content-Range" in response.headers
+        assert response.headers["Content-Range"].startswith("bytes 0-9/")
+
+    @pytest.mark.integration
+    def test_range_request_middle_bytes(self, integration_client, test_package):
+        """Test range request for bytes in the middle."""
+        project, package = test_package
+        content = b"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+        upload_test_file(integration_client, project, package, content, tag="range-mid")
+
+        # Request bytes 10-19 (KLMNOPQRST)
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/range-mid",
+            params={"mode": "proxy"},
+            headers={"Range": "bytes=10-19"},
+        )
+        assert response.status_code == 206
+        assert response.content == b"KLMNOPQRST"
+
+    @pytest.mark.integration
+    def test_range_request_suffix_bytes(self, integration_client, test_package):
+        """Test range request for last N bytes (suffix range)."""
+        project, package = test_package
+        content = b"0123456789ABCDEF"  # 16 bytes
+        upload_test_file(integration_client, project, package, content, tag="range-suffix")
+
+        # Request last 4 bytes
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/range-suffix",
+            params={"mode": "proxy"},
+            headers={"Range": "bytes=-4"},
+        )
+        assert response.status_code == 206
+        assert response.content == b"CDEF"
+
+    @pytest.mark.integration
+    def test_range_request_open_ended(self, integration_client, test_package):
+        """Test range request from offset to end."""
+        project, package = test_package
+        content = b"0123456789"
+        upload_test_file(integration_client, project, package, content, tag="range-open")
+
+        # Request from byte 5 to end
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/range-open",
+            params={"mode": "proxy"},
+            headers={"Range": "bytes=5-"},
+        )
+        assert response.status_code == 206
+        assert response.content == b"56789"
+
+    @pytest.mark.integration
+    def test_range_request_includes_accept_ranges_header(
+        self, integration_client, test_package
+    ):
+        """Test that range requests include Accept-Ranges header."""
+        project, package = test_package
+        content = b"test content"
+        upload_test_file(integration_client, project, package, content, tag="accept-ranges")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/accept-ranges",
+            params={"mode": "proxy"},
+            headers={"Range": "bytes=0-4"},
+        )
+        assert response.status_code == 206
+        assert response.headers.get("Accept-Ranges") == "bytes"
+
+    @pytest.mark.integration
+    def test_full_download_advertises_accept_ranges(
+        self, integration_client, test_package
+    ):
+        """Test that full downloads advertise range support."""
+        project, package = test_package
+        content = b"test content"
+        upload_test_file(integration_client, project, package, content, tag="full-accept")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/full-accept",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.headers.get("Accept-Ranges") == "bytes"
+
+
+class TestConditionalRequests:
+    """Tests for conditional request handling (304 Not Modified)."""
+
+    @pytest.mark.integration
+    def test_if_none_match_returns_304(self, integration_client, test_package):
+        """Test If-None-Match with matching ETag returns 304."""
+        project, package = test_package
+        content = b"conditional request test content"
+        expected_hash = compute_sha256(content)
+        upload_test_file(integration_client, project, package, content, tag="cond-etag")
+
+        # Request with matching ETag
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/cond-etag",
+            params={"mode": "proxy"},
+            headers={"If-None-Match": f'"{expected_hash}"'},
+        )
+        assert response.status_code == 304
+        assert response.content == b""  # No body for 304
+
+    @pytest.mark.integration
+    def test_if_none_match_without_quotes(self, integration_client, test_package):
+        """Test If-None-Match works with or without quotes."""
+        project, package = test_package
+        content = b"etag no quotes test"
+        expected_hash = compute_sha256(content)
+        upload_test_file(integration_client, project, package, content, tag="cond-noquote")
+
+        # Request with ETag without quotes
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/cond-noquote",
+            params={"mode": "proxy"},
+            headers={"If-None-Match": expected_hash},
+        )
+        assert response.status_code == 304
+
+    @pytest.mark.integration
+    def test_if_none_match_mismatch_returns_200(self, integration_client, test_package):
+        """Test If-None-Match with non-matching ETag returns 200."""
+        project, package = test_package
+        content = b"etag mismatch test"
+        upload_test_file(integration_client, project, package, content, tag="cond-mismatch")
+
+        # Request with different ETag
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/cond-mismatch",
+            params={"mode": "proxy"},
+            headers={"If-None-Match": '"different-etag-value"'},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+    @pytest.mark.integration
+    def test_if_modified_since_returns_304(self, integration_client, test_package):
+        """Test If-Modified-Since with future date returns 304."""
+        project, package = test_package
+        content = b"modified since test"
+        upload_test_file(integration_client, project, package, content, tag="cond-modified")
+
+        # Request with future date (artifact was definitely created before this)
+        future_date = formatdate(time.time() + 86400, usegmt=True)  # Tomorrow
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/cond-modified",
+            params={"mode": "proxy"},
+            headers={"If-Modified-Since": future_date},
+        )
+        assert response.status_code == 304
+
+    @pytest.mark.integration
+    def test_if_modified_since_old_date_returns_200(
+        self, integration_client, test_package
+    ):
+        """Test If-Modified-Since with old date returns 200."""
+        project, package = test_package
+        content = b"old date test"
+        upload_test_file(integration_client, project, package, content, tag="cond-old")
+
+        # Request with old date (2020-01-01)
+        old_date = "Wed, 01 Jan 2020 00:00:00 GMT"
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/cond-old",
+            params={"mode": "proxy"},
+            headers={"If-Modified-Since": old_date},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+    @pytest.mark.integration
+    def test_304_includes_etag(self, integration_client, test_package):
+        """Test 304 response includes ETag header."""
+        project, package = test_package
+        content = b"304 etag test"
+        expected_hash = compute_sha256(content)
+        upload_test_file(integration_client, project, package, content, tag="304-etag")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/304-etag",
+            params={"mode": "proxy"},
+            headers={"If-None-Match": f'"{expected_hash}"'},
+        )
+        assert response.status_code == 304
+        assert response.headers.get("ETag") == f'"{expected_hash}"'
+
+    @pytest.mark.integration
+    def test_304_includes_cache_control(self, integration_client, test_package):
+        """Test 304 response includes Cache-Control header."""
+        project, package = test_package
+        content = b"304 cache test"
+        expected_hash = compute_sha256(content)
+        upload_test_file(integration_client, project, package, content, tag="304-cache")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/304-cache",
+            params={"mode": "proxy"},
+            headers={"If-None-Match": f'"{expected_hash}"'},
+        )
+        assert response.status_code == 304
+        assert "immutable" in response.headers.get("Cache-Control", "")
+
+
+class TestCachingHeaders:
+    """Tests for caching headers on download responses."""
+
+    @pytest.mark.integration
+    def test_download_includes_cache_control(self, integration_client, test_package):
+        """Test download response includes Cache-Control header."""
+        project, package = test_package
+        content = b"cache control test"
+        upload_test_file(integration_client, project, package, content, tag="cache-ctl")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/cache-ctl",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        cache_control = response.headers.get("Cache-Control", "")
+        assert "public" in cache_control
+        assert "immutable" in cache_control
+        assert "max-age" in cache_control
+
+    @pytest.mark.integration
+    def test_download_includes_last_modified(self, integration_client, test_package):
+        """Test download response includes Last-Modified header."""
+        project, package = test_package
+        content = b"last modified test"
+        upload_test_file(integration_client, project, package, content, tag="last-mod")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/last-mod",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert "Last-Modified" in response.headers
+        # Should be in RFC 7231 format
+        last_modified = response.headers["Last-Modified"]
+        assert "GMT" in last_modified
+
+    @pytest.mark.integration
+    def test_download_includes_etag(self, integration_client, test_package):
+        """Test download response includes ETag header."""
+        project, package = test_package
+        content = b"etag header test"
+        expected_hash = compute_sha256(content)
+        upload_test_file(integration_client, project, package, content, tag="etag-hdr")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/etag-hdr",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.headers.get("ETag") == f'"{expected_hash}"'
+
+
+class TestDownloadResume:
+    """Tests for download resume functionality using range requests."""
+
+    @pytest.mark.integration
+    def test_resume_download_after_partial(self, integration_client, test_package):
+        """Test resuming download from where it left off."""
+        project, package = test_package
+        content = b"ABCDEFGHIJ" * 100  # 1000 bytes
+        upload_test_file(integration_client, project, package, content, tag="resume-test")
+
+        # Simulate partial download (first 500 bytes)
+        response1 = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/resume-test",
+            params={"mode": "proxy"},
+            headers={"Range": "bytes=0-499"},
+        )
+        assert response1.status_code == 206
+        first_half = response1.content
+        assert len(first_half) == 500
+
+        # Resume from byte 500
+        response2 = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/resume-test",
+            params={"mode": "proxy"},
+            headers={"Range": "bytes=500-"},
+        )
+        assert response2.status_code == 206
+        second_half = response2.content
+        assert len(second_half) == 500
+
+        # Combine and verify
+        combined = first_half + second_half
+        assert combined == content
+
+    @pytest.mark.integration
+    def test_resume_with_etag_verification(self, integration_client, test_package):
+        """Test that resumed download can verify content hasn't changed."""
+        project, package = test_package
+        content = b"resume etag verification test content"
+        expected_hash = compute_sha256(content)
+        upload_test_file(integration_client, project, package, content, tag="resume-etag")
+
+        # Get ETag from first request
+        response1 = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/resume-etag",
+            params={"mode": "proxy"},
+            headers={"Range": "bytes=0-9"},
+        )
+        assert response1.status_code == 206
+        etag = response1.headers.get("ETag")
+        assert etag == f'"{expected_hash}"'
+
+        # Resume with If-Match to ensure content hasn't changed
+        # (Note: If-Match would fail and return 412 if content changed)
+        response2 = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/resume-etag",
+            params={"mode": "proxy"},
+            headers={"Range": "bytes=10-"},
+        )
+        assert response2.status_code == 206
+        # ETag should be the same
+        assert response2.headers.get("ETag") == etag
+
+
+class TestLargeFileStreaming:
+    """Tests for streaming large files."""
+
+    @pytest.mark.integration
+    def test_stream_1mb_file(self, integration_client, test_package, sized_content):
+        """Test streaming a 1MB file."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_1MB, seed=500)
+
+        upload_test_file(integration_client, project, package, content, tag="stream-1mb")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/stream-1mb",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert len(response.content) == SIZE_1MB
+        assert compute_sha256(response.content) == expected_hash
+
+    @pytest.mark.integration
+    def test_stream_large_file_has_correct_headers(
+        self, integration_client, test_package, sized_content
+    ):
+        """Test that large file streaming has correct headers."""
+        project, package = test_package
+        content, expected_hash = sized_content(SIZE_100KB, seed=501)
+
+        upload_test_file(integration_client, project, package, content, tag="stream-hdr")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/stream-hdr",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert int(response.headers.get("Content-Length", 0)) == SIZE_100KB
+        assert response.headers.get("X-Checksum-SHA256") == expected_hash
+        assert response.headers.get("Accept-Ranges") == "bytes"
+
+    @pytest.mark.integration
+    def test_range_request_on_large_file(
+        self, integration_client, test_package, sized_content
+    ):
+        """Test range request on a larger file."""
+        project, package = test_package
+        content, _ = sized_content(SIZE_100KB, seed=502)
+
+        upload_test_file(integration_client, project, package, content, tag="range-large")
+
+        # Request a slice from the middle
+        start = 50000
+        end = 50999
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/range-large",
+            params={"mode": "proxy"},
+            headers={"Range": f"bytes={start}-{end}"},
+        )
+        assert response.status_code == 206
+        assert len(response.content) == 1000
+        assert response.content == content[start : end + 1]
+
+
+class TestDownloadModes:
+    """Tests for different download modes."""
+
+    @pytest.mark.integration
+    def test_proxy_mode_streams_content(self, integration_client, test_package):
+        """Test proxy mode streams content through backend."""
+        project, package = test_package
+        content = b"proxy mode test content"
+        upload_test_file(integration_client, project, package, content, tag="mode-proxy")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/mode-proxy",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+    @pytest.mark.integration
+    def test_presigned_mode_returns_url(self, integration_client, test_package):
+        """Test presigned mode returns JSON with URL."""
+        project, package = test_package
+        content = b"presigned mode test"
+        upload_test_file(integration_client, project, package, content, tag="mode-presign")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/mode-presign",
+            params={"mode": "presigned"},
+        )
+        assert response.status_code == 200
+        data = response.json()
+        assert "url" in data
+        assert "expires_at" in data
+        assert data["url"].startswith("http")
+
+    @pytest.mark.integration
+    def test_redirect_mode_returns_302(self, integration_client, test_package):
+        """Test redirect mode returns 302 to presigned URL."""
+        project, package = test_package
+        content = b"redirect mode test"
+        upload_test_file(integration_client, project, package, content, tag="mode-redir")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/mode-redir",
+            params={"mode": "redirect"},
+            follow_redirects=False,
+        )
+        assert response.status_code == 302
+        assert "Location" in response.headers
+
+
+class TestIntegrityDuringStreaming:
+    """Tests for data integrity during streaming downloads."""
+
+    @pytest.mark.integration
+    def test_checksum_header_matches_content(self, integration_client, test_package):
+        """Test X-Checksum-SHA256 header matches actual downloaded content."""
+        project, package = test_package
+        content = b"integrity check content"
+        expected_hash = compute_sha256(content)
+        upload_test_file(integration_client, project, package, content, tag="integrity")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/integrity",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+
+        header_hash = response.headers.get("X-Checksum-SHA256")
+        actual_hash = compute_sha256(response.content)
+
+        assert header_hash == expected_hash
+        assert actual_hash == expected_hash
+        assert header_hash == actual_hash
+
+    @pytest.mark.integration
+    def test_etag_matches_content_hash(self, integration_client, test_package):
+        """Test ETag header matches content hash."""
+        project, package = test_package
+        content = b"etag integrity test"
+        expected_hash = compute_sha256(content)
+        upload_test_file(integration_client, project, package, content, tag="etag-int")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/etag-int",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+
+        etag = response.headers.get("ETag", "").strip('"')
+        actual_hash = compute_sha256(response.content)
+
+        assert etag == expected_hash
+        assert actual_hash == expected_hash
+
+    @pytest.mark.integration
+    def test_digest_header_present(self, integration_client, test_package):
+        """Test Digest header is present in RFC 3230 format."""
+        project, package = test_package
+        content = b"digest header test"
+        upload_test_file(integration_client, project, package, content, tag="digest")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/digest",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert "Digest" in response.headers
+        assert response.headers["Digest"].startswith("sha-256=")

backend/tests/integration/test_tags_api.py

@@ -0,0 +1,403 @@
+"""
+Integration tests for tag API endpoints.
+
+Tests cover:
+- Tag CRUD operations
+- Tag listing with pagination and search
+- Tag history tracking
+- ref_count behavior with tag operations
+"""
+
+import pytest
+from tests.factories import compute_sha256, upload_test_file
+
+
+class TestTagCRUD:
+    """Tests for tag create, read, delete operations."""
+
+    @pytest.mark.integration
+    def test_create_tag_via_upload(self, integration_client, test_package):
+        """Test creating a tag via upload endpoint."""
+        project_name, package_name = test_package
+
+        result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"tag create test",
+            tag="v1.0.0",
+        )
+
+        assert result["tag"] == "v1.0.0"
+        assert result["artifact_id"]
+
+    @pytest.mark.integration
+    def test_create_tag_via_post(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test creating a tag via POST /tags endpoint."""
+        project_name, package_name = test_package
+
+        # First upload an artifact
+        result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"artifact for tag",
+        )
+        artifact_id = result["artifact_id"]
+
+        # Create tag via POST
+        tag_name = f"post-tag-{unique_test_id}"
+        response = integration_client.post(
+            f"/api/v1/project/{project_name}/{package_name}/tags",
+            json={"name": tag_name, "artifact_id": artifact_id},
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert data["name"] == tag_name
+        assert data["artifact_id"] == artifact_id
+
+    @pytest.mark.integration
+    def test_get_tag(self, integration_client, test_package):
+        """Test getting a tag by name."""
+        project_name, package_name = test_package
+
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"get tag test",
+            tag="get-tag",
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/tags/get-tag"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert data["name"] == "get-tag"
+        assert "artifact_id" in data
+        assert "artifact_size" in data
+        assert "artifact_content_type" in data
+
+    @pytest.mark.integration
+    def test_list_tags(self, integration_client, test_package):
+        """Test listing tags for a package."""
+        project_name, package_name = test_package
+
+        # Create some tags
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"list tags test",
+            tag="list-v1",
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/tags"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "items" in data
+        assert "pagination" in data
+
+        tag_names = [t["name"] for t in data["items"]]
+        assert "list-v1" in tag_names
+
+    @pytest.mark.integration
+    def test_delete_tag(self, integration_client, test_package):
+        """Test deleting a tag."""
+        project_name, package_name = test_package
+
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"delete tag test",
+            tag="to-delete",
+        )
+
+        # Delete tag
+        response = integration_client.delete(
+            f"/api/v1/project/{project_name}/{package_name}/tags/to-delete"
+        )
+        assert response.status_code == 204
+
+        # Verify deleted
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/tags/to-delete"
+        )
+        assert response.status_code == 404
+
+
+class TestTagListingFilters:
+    """Tests for tag listing with filters and search."""
+
+    @pytest.mark.integration
+    def test_tags_pagination(self, integration_client, test_package):
+        """Test tag listing respects pagination."""
+        project_name, package_name = test_package
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/tags?limit=5"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert len(data["items"]) <= 5
+        assert data["pagination"]["limit"] == 5
+
+    @pytest.mark.integration
+    def test_tags_search(self, integration_client, test_package, unique_test_id):
+        """Test tag search by name."""
+        project_name, package_name = test_package
+
+        tag_name = f"searchable-{unique_test_id}"
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"search test",
+            tag=tag_name,
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/tags?search=searchable"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        tag_names = [t["name"] for t in data["items"]]
+        assert tag_name in tag_names
+
+
+class TestTagHistory:
+    """Tests for tag history tracking."""
+
+    @pytest.mark.integration
+    def test_tag_history_on_create(self, integration_client, test_package):
+        """Test tag history is created when tag is created."""
+        project_name, package_name = test_package
+
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"history create test",
+            tag="history-create",
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/tags/history-create/history"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert len(data) >= 1
+
+    @pytest.mark.integration
+    def test_tag_history_on_update(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test tag history is created when tag is updated."""
+        project_name, package_name = test_package
+
+        tag_name = f"history-update-{unique_test_id}"
+
+        # Create tag with first artifact
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"first content",
+            tag=tag_name,
+        )
+
+        # Update tag with second artifact
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"second content",
+            tag=tag_name,
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/tags/{tag_name}/history"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        # Should have at least 2 history entries (create + update)
+        assert len(data) >= 2
+
+
+class TestTagRefCount:
+    """Tests for ref_count behavior with tag operations."""
+
+    @pytest.mark.integration
+    def test_ref_count_decrements_on_tag_delete(self, integration_client, test_package):
+        """Test ref_count decrements when a tag is deleted."""
+        project_name, package_name = test_package
+        content = b"ref count delete test"
+        expected_hash = compute_sha256(content)
+
+        # Upload with two tags
+        upload_test_file(
+            integration_client, project_name, package_name, content, tag="rc-v1"
+        )
+        upload_test_file(
+            integration_client, project_name, package_name, content, tag="rc-v2"
+        )
+
+        # Verify ref_count is 2
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.json()["ref_count"] == 2
+
+        # Delete one tag
+        delete_response = integration_client.delete(
+            f"/api/v1/project/{project_name}/{package_name}/tags/rc-v1"
+        )
+        assert delete_response.status_code == 204
+
+        # Verify ref_count is now 1
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.json()["ref_count"] == 1
+
+    @pytest.mark.integration
+    def test_ref_count_zero_after_all_tags_deleted(
+        self, integration_client, test_package
+    ):
+        """Test ref_count goes to 0 when all tags are deleted."""
+        project_name, package_name = test_package
+        content = b"orphan test content"
+        expected_hash = compute_sha256(content)
+
+        # Upload with one tag
+        upload_test_file(
+            integration_client, project_name, package_name, content, tag="only-tag"
+        )
+
+        # Delete the tag
+        integration_client.delete(
+            f"/api/v1/project/{project_name}/{package_name}/tags/only-tag"
+        )
+
+        # Verify ref_count is 0
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.json()["ref_count"] == 0
+
+    @pytest.mark.integration
+    def test_ref_count_adjusts_on_tag_update(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test ref_count adjusts when a tag is updated to point to different artifact."""
+        project_name, package_name = test_package
+
+        # Upload two different artifacts
+        content1 = f"artifact one {unique_test_id}".encode()
+        content2 = f"artifact two {unique_test_id}".encode()
+        hash1 = compute_sha256(content1)
+        hash2 = compute_sha256(content2)
+
+        # Upload first artifact with tag "latest"
+        upload_test_file(
+            integration_client, project_name, package_name, content1, tag="latest"
+        )
+
+        # Verify first artifact has ref_count 1
+        response = integration_client.get(f"/api/v1/artifact/{hash1}")
+        assert response.json()["ref_count"] == 1
+
+        # Upload second artifact with different tag
+        upload_test_file(
+            integration_client, project_name, package_name, content2, tag="stable"
+        )
+
+        # Now update "latest" tag to point to second artifact
+        upload_test_file(
+            integration_client, project_name, package_name, content2, tag="latest"
+        )
+
+        # Verify first artifact ref_count decreased to 0
+        response = integration_client.get(f"/api/v1/artifact/{hash1}")
+        assert response.json()["ref_count"] == 0
+
+        # Verify second artifact ref_count increased to 2
+        response = integration_client.get(f"/api/v1/artifact/{hash2}")
+        assert response.json()["ref_count"] == 2
+
+    @pytest.mark.integration
+    def test_ref_count_unchanged_when_tag_same_artifact(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test ref_count doesn't change when tag is 'updated' to same artifact."""
+        project_name, package_name = test_package
+
+        content = f"same artifact {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        # Upload with tag
+        upload_test_file(
+            integration_client, project_name, package_name, content, tag="same-v1"
+        )
+
+        # Verify ref_count is 1
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.json()["ref_count"] == 1
+
+        # Upload same content with same tag (no-op)
+        upload_test_file(
+            integration_client, project_name, package_name, content, tag="same-v1"
+        )
+
+        # Verify ref_count is still 1
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.json()["ref_count"] == 1
+
+    @pytest.mark.integration
+    def test_tag_via_post_endpoint_increments_ref_count(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test creating tag via POST /tags endpoint increments ref_count."""
+        project_name, package_name = test_package
+
+        content = f"tag endpoint test {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        # Upload artifact without tag
+        result = upload_test_file(
+            integration_client, project_name, package_name, content, filename="test.bin"
+        )
+        artifact_id = result["artifact_id"]
+
+        # Verify ref_count is 0 (no tags yet)
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.json()["ref_count"] == 0
+
+        # Create tag via POST endpoint
+        tag_response = integration_client.post(
+            f"/api/v1/project/{project_name}/{package_name}/tags",
+            json={"name": "post-v1", "artifact_id": artifact_id},
+        )
+        assert tag_response.status_code == 200
+
+        # Verify ref_count is now 1
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.json()["ref_count"] == 1
+
+        # Create another tag via POST endpoint
+        tag_response = integration_client.post(
+            f"/api/v1/project/{project_name}/{package_name}/tags",
+            json={"name": "post-latest", "artifact_id": artifact_id},
+        )
+        assert tag_response.status_code == 200
+
+        # Verify ref_count is now 2
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.json()["ref_count"] == 2

backend/tests/integration/test_upload_download_api.py

@@ -0,0 +1,962 @@
+"""
+Integration tests for upload and download API endpoints.
+
+Tests cover:
+- Upload functionality and deduplication
+- Download by tag and artifact ID
+- Concurrent upload handling
+- File size validation
+- Upload failure cleanup
+- S3 storage verification
+"""
+
+import os
+import pytest
+import io
+import threading
+from concurrent.futures import ThreadPoolExecutor, as_completed
+from tests.factories import (
+    compute_sha256,
+    upload_test_file,
+    list_s3_objects_by_hash,
+    s3_object_exists,
+)
+
+
+class TestUploadBasics:
+    """Tests for basic upload functionality."""
+
+    @pytest.mark.integration
+    def test_upload_returns_200(self, integration_client, test_package):
+        """Test upload with valid file returns 200."""
+        project, package = test_package
+        content = b"valid file upload test"
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+        )
+        assert response.status_code == 200
+
+    @pytest.mark.integration
+    def test_upload_returns_artifact_id(self, integration_client, test_package):
+        """Test upload returns the artifact ID (SHA256 hash)."""
+        project_name, package_name = test_package
+        content = b"basic upload test"
+        expected_hash = compute_sha256(content)
+
+        result = upload_test_file(
+            integration_client, project_name, package_name, content, tag="v1"
+        )
+
+        assert result["artifact_id"] == expected_hash
+
+    @pytest.mark.integration
+    def test_upload_response_has_upload_id(self, integration_client, test_package):
+        """Test upload response includes upload_id."""
+        project_name, package_name = test_package
+
+        result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"upload id test",
+            "uploadid.txt",
+        )
+
+        assert "upload_id" in result
+        assert result["upload_id"] is not None
+
+    @pytest.mark.integration
+    def test_upload_response_has_content_type(self, integration_client, test_package):
+        """Test upload response includes content_type."""
+        project_name, package_name = test_package
+
+        result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"content type test",
+            "content.txt",
+        )
+
+        assert "content_type" in result
+
+    @pytest.mark.integration
+    def test_upload_response_has_original_name(self, integration_client, test_package):
+        """Test upload response includes original_name."""
+        project_name, package_name = test_package
+
+        result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"original name test",
+            "originalname.txt",
+        )
+
+        assert "original_name" in result
+        assert result["original_name"] == "originalname.txt"
+
+    @pytest.mark.integration
+    def test_upload_response_has_created_at(self, integration_client, test_package):
+        """Test upload response includes created_at."""
+        project_name, package_name = test_package
+
+        result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"created at test",
+            "createdat.txt",
+        )
+
+        assert "created_at" in result
+        assert result["created_at"] is not None
+
+    @pytest.mark.integration
+    def test_upload_without_tag_succeeds(self, integration_client, test_package):
+        """Test upload without tag succeeds (no tag created)."""
+        project, package = test_package
+        content = b"upload without tag test"
+        expected_hash = compute_sha256(content)
+
+        files = {"file": ("no_tag.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            # No tag parameter
+        )
+        assert response.status_code == 200
+        result = response.json()
+        assert result["artifact_id"] == expected_hash
+
+        # Verify no tag was created - list tags and check
+        tags_response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/tags"
+        )
+        assert tags_response.status_code == 200
+        tags = tags_response.json()
+        # Filter for tags pointing to this artifact
+        artifact_tags = [t for t in tags.get("items", tags) if t.get("artifact_id") == expected_hash]
+        assert len(artifact_tags) == 0, "Tag should not be created when not specified"
+
+    @pytest.mark.integration
+    def test_upload_creates_artifact_in_database(self, integration_client, test_package):
+        """Test upload creates artifact record in database."""
+        project, package = test_package
+        content = b"database artifact test"
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(integration_client, project, package, content)
+
+        # Verify artifact exists via API
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.status_code == 200
+        artifact = response.json()
+        assert artifact["id"] == expected_hash
+        assert artifact["size"] == len(content)
+
+    @pytest.mark.integration
+    @pytest.mark.requires_direct_s3
+    def test_upload_creates_object_in_s3(self, integration_client, test_package):
+        """Test upload creates object in S3 storage."""
+        project, package = test_package
+        content = b"s3 object creation test"
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(integration_client, project, package, content)
+
+        # Verify S3 object exists
+        assert s3_object_exists(expected_hash), "S3 object should exist after upload"
+
+    @pytest.mark.integration
+    def test_upload_with_tag_creates_tag_record(self, integration_client, test_package):
+        """Test upload with tag creates tag record."""
+        project, package = test_package
+        content = b"tag creation test"
+        expected_hash = compute_sha256(content)
+        tag_name = "my-tag-v1"
+
+        upload_test_file(
+            integration_client, project, package, content, tag=tag_name
+        )
+
+        # Verify tag exists
+        tags_response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/tags"
+        )
+        assert tags_response.status_code == 200
+        tags = tags_response.json()
+        tag_names = [t["name"] for t in tags.get("items", tags)]
+        assert tag_name in tag_names
+
+
+class TestDuplicateUploads:
+    """Tests for duplicate upload deduplication behavior."""
+
+    @pytest.mark.integration
+    def test_same_file_twice_returns_same_artifact_id(
+        self, integration_client, test_package
+    ):
+        """Test uploading same file twice returns same artifact_id."""
+        project, package = test_package
+        content = b"content uploaded twice for same artifact test"
+        expected_hash = compute_sha256(content)
+
+        # First upload
+        result1 = upload_test_file(
+            integration_client, project, package, content, tag="first"
+        )
+        assert result1["artifact_id"] == expected_hash
+
+        # Second upload
+        result2 = upload_test_file(
+            integration_client, project, package, content, tag="second"
+        )
+        assert result2["artifact_id"] == expected_hash
+        assert result1["artifact_id"] == result2["artifact_id"]
+
+    @pytest.mark.integration
+    def test_same_file_twice_increments_ref_count(
+        self, integration_client, test_package
+    ):
+        """Test uploading same file twice increments ref_count to 2."""
+        project, package = test_package
+        content = b"content for ref count increment test"
+
+        # First upload
+        result1 = upload_test_file(
+            integration_client, project, package, content, tag="v1"
+        )
+        assert result1["ref_count"] == 1
+
+        # Second upload
+        result2 = upload_test_file(
+            integration_client, project, package, content, tag="v2"
+        )
+        assert result2["ref_count"] == 2
+
+    @pytest.mark.integration
+    def test_same_file_different_packages_shares_artifact(
+        self, integration_client, test_project, unique_test_id
+    ):
+        """Test uploading same file to different packages shares artifact."""
+        project = test_project
+        content = f"content shared across packages {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        # Create two packages
+        pkg1 = f"package-a-{unique_test_id}"
+        pkg2 = f"package-b-{unique_test_id}"
+
+        integration_client.post(
+            f"/api/v1/project/{project}/packages",
+            json={"name": pkg1, "description": "Package A"},
+        )
+        integration_client.post(
+            f"/api/v1/project/{project}/packages",
+            json={"name": pkg2, "description": "Package B"},
+        )
+
+        # Upload to first package
+        result1 = upload_test_file(integration_client, project, pkg1, content, tag="v1")
+        assert result1["artifact_id"] == expected_hash
+        assert result1["deduplicated"] is False
+
+        # Upload to second package
+        result2 = upload_test_file(integration_client, project, pkg2, content, tag="v1")
+        assert result2["artifact_id"] == expected_hash
+        assert result2["deduplicated"] is True
+
+    @pytest.mark.integration
+    def test_same_file_different_filenames_shares_artifact(
+        self, integration_client, test_package
+    ):
+        """Test uploading same file with different filenames shares artifact."""
+        project, package = test_package
+        content = b"content with different filenames"
+        expected_hash = compute_sha256(content)
+
+        # Upload with filename1
+        result1 = upload_test_file(
+            integration_client,
+            project,
+            package,
+            content,
+            filename="file1.bin",
+            tag="v1",
+        )
+        assert result1["artifact_id"] == expected_hash
+
+        # Upload with filename2
+        result2 = upload_test_file(
+            integration_client,
+            project,
+            package,
+            content,
+            filename="file2.bin",
+            tag="v2",
+        )
+        assert result2["artifact_id"] == expected_hash
+        assert result2["deduplicated"] is True
+
+
+class TestDownload:
+    """Tests for download functionality."""
+
+    @pytest.mark.integration
+    def test_download_by_tag(self, integration_client, test_package):
+        """Test downloading artifact by tag name."""
+        project, package = test_package
+        original_content = b"download by tag test"
+
+        upload_test_file(
+            integration_client, project, package, original_content, tag="download-tag"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/download-tag",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == original_content
+
+    @pytest.mark.integration
+    def test_download_by_artifact_id(self, integration_client, test_package):
+        """Test downloading artifact by artifact ID."""
+        project, package = test_package
+        original_content = b"download by id test"
+        expected_hash = compute_sha256(original_content)
+
+        upload_test_file(integration_client, project, package, original_content)
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/artifact:{expected_hash}",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == original_content
+
+    @pytest.mark.integration
+    def test_download_by_tag_prefix(self, integration_client, test_package):
+        """Test downloading artifact using tag: prefix."""
+        project, package = test_package
+        original_content = b"download by tag prefix test"
+
+        upload_test_file(
+            integration_client, project, package, original_content, tag="prefix-tag"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/tag:prefix-tag",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == original_content
+
+    @pytest.mark.integration
+    def test_download_nonexistent_tag(self, integration_client, test_package):
+        """Test downloading nonexistent tag returns 404."""
+        project, package = test_package
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/nonexistent-tag"
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_download_nonexistent_artifact(self, integration_client, test_package):
+        """Test downloading nonexistent artifact ID returns 404."""
+        project, package = test_package
+        fake_hash = "0" * 64
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/artifact:{fake_hash}"
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_download_from_nonexistent_project(self, integration_client, unique_test_id):
+        """Test downloading from nonexistent project returns 404."""
+        response = integration_client.get(
+            f"/api/v1/project/nonexistent-project-{unique_test_id}/somepackage/+/sometag"
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_download_from_nonexistent_package(self, integration_client, test_project, unique_test_id):
+        """Test downloading from nonexistent package returns 404."""
+        response = integration_client.get(
+            f"/api/v1/project/{test_project}/nonexistent-package-{unique_test_id}/+/sometag"
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_content_matches_original(self, integration_client, test_package):
+        """Test downloaded content matches original exactly."""
+        project, package = test_package
+        original_content = b"exact content verification test data 12345"
+
+        upload_test_file(
+            integration_client, project, package, original_content, tag="verify"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/verify", params={"mode": "proxy"}
+        )
+        assert response.status_code == 200
+        assert response.content == original_content
+
+
+class TestDownloadHeaders:
+    """Tests for download response headers."""
+
+    @pytest.mark.integration
+    def test_download_content_type_header(self, integration_client, test_package):
+        """Test download returns correct Content-Type header."""
+        project, package = test_package
+        content = b"content type header test"
+
+        upload_test_file(
+            integration_client, project, package, content,
+            filename="test.txt", tag="content-type-test"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/content-type-test",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        # Content-Type should be set (either text/plain or application/octet-stream)
+        assert "content-type" in response.headers
+
+    @pytest.mark.integration
+    def test_download_content_length_header(self, integration_client, test_package):
+        """Test download returns correct Content-Length header."""
+        project, package = test_package
+        content = b"content length header test - exactly 41 bytes!"
+        expected_length = len(content)
+
+        upload_test_file(
+            integration_client, project, package, content, tag="content-length-test"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/content-length-test",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert "content-length" in response.headers
+        assert int(response.headers["content-length"]) == expected_length
+
+    @pytest.mark.integration
+    def test_download_content_disposition_header(self, integration_client, test_package):
+        """Test download returns correct Content-Disposition header."""
+        project, package = test_package
+        content = b"content disposition test"
+        filename = "my-test-file.bin"
+
+        upload_test_file(
+            integration_client, project, package, content,
+            filename=filename, tag="disposition-test"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/disposition-test",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert "content-disposition" in response.headers
+        disposition = response.headers["content-disposition"]
+        assert "attachment" in disposition
+        assert filename in disposition
+
+    @pytest.mark.integration
+    def test_download_checksum_headers(self, integration_client, test_package):
+        """Test download returns checksum headers."""
+        project, package = test_package
+        content = b"checksum header test content"
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(
+            integration_client, project, package, content, tag="checksum-headers"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/checksum-headers",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        # Check for checksum headers
+        assert "x-checksum-sha256" in response.headers
+        assert response.headers["x-checksum-sha256"] == expected_hash
+
+    @pytest.mark.integration
+    def test_download_etag_header(self, integration_client, test_package):
+        """Test download returns ETag header (artifact ID)."""
+        project, package = test_package
+        content = b"etag header test"
+        expected_hash = compute_sha256(content)
+
+        upload_test_file(
+            integration_client, project, package, content, tag="etag-test"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/etag-test",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert "etag" in response.headers
+        # ETag should contain the artifact ID (hash)
+        etag = response.headers["etag"].strip('"')
+        assert etag == expected_hash
+
+
+class TestConcurrentUploads:
+    """Tests for concurrent upload handling."""
+
+    @pytest.mark.integration
+    def test_concurrent_uploads_same_file(self, integration_client, test_package):
+        """Test concurrent uploads of same file handle deduplication correctly."""
+        project, package = test_package
+        content = b"content for concurrent upload test"
+        expected_hash = compute_sha256(content)
+        num_concurrent = 5
+
+        # Create an API key for worker threads
+        api_key_response = integration_client.post(
+            "/api/v1/auth/keys",
+            json={"name": "concurrent-test-key"},
+        )
+        assert api_key_response.status_code == 200, f"Failed to create API key: {api_key_response.text}"
+        api_key = api_key_response.json()["key"]
+
+        results = []
+        errors = []
+
+        def upload_worker(tag_suffix):
+            try:
+                from httpx import Client
+
+                base_url = os.environ.get("ORCHARD_TEST_URL", "http://localhost:8080")
+                with Client(base_url=base_url, timeout=30.0) as client:
+                    files = {
+                        "file": (
+                            f"concurrent-{tag_suffix}.bin",
+                            io.BytesIO(content),
+                            "application/octet-stream",
+                        )
+                    }
+                    response = client.post(
+                        f"/api/v1/project/{project}/{package}/upload",
+                        files=files,
+                        data={"tag": f"concurrent-{tag_suffix}"},
+                        headers={"Authorization": f"Bearer {api_key}"},
+                    )
+                    if response.status_code == 200:
+                        results.append(response.json())
+                    else:
+                        errors.append(f"Status {response.status_code}: {response.text}")
+            except Exception as e:
+                errors.append(str(e))
+
+        with ThreadPoolExecutor(max_workers=num_concurrent) as executor:
+            futures = [executor.submit(upload_worker, i) for i in range(num_concurrent)]
+            for future in as_completed(futures):
+                pass
+
+        assert len(errors) == 0, f"Errors during concurrent uploads: {errors}"
+        assert len(results) == num_concurrent
+
+        # All should have same artifact_id
+        artifact_ids = set(r["artifact_id"] for r in results)
+        assert len(artifact_ids) == 1
+        assert expected_hash in artifact_ids
+
+        # Verify final ref_count
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.status_code == 200
+        assert response.json()["ref_count"] == num_concurrent
+
+
+class TestFileSizeValidation:
+    """Tests for file size limits and empty file rejection."""
+
+    @pytest.mark.integration
+    def test_empty_file_rejected(self, integration_client, test_package):
+        """Test empty files are rejected with appropriate error."""
+        project, package = test_package
+
+        files = {"file": ("empty.txt", io.BytesIO(b""), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+        )
+
+        assert response.status_code in [422, 400]
+
+    @pytest.mark.integration
+    def test_small_valid_file_accepted(self, integration_client, test_package):
+        """Test small (1 byte) files are accepted."""
+        project, package = test_package
+        content = b"X"
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="tiny"
+        )
+
+        assert result["artifact_id"] is not None
+        assert result["size"] == 1
+
+    @pytest.mark.integration
+    def test_file_size_reported_correctly(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test file size is correctly reported in response."""
+        project, package = test_package
+        content = f"Test content for size check {unique_test_id}".encode()
+        expected_size = len(content)
+
+        result = upload_test_file(
+            integration_client, project, package, content, tag="size-test"
+        )
+
+        assert result["size"] == expected_size
+
+        # Also verify via artifact endpoint
+        artifact_response = integration_client.get(
+            f"/api/v1/artifact/{result['artifact_id']}"
+        )
+        assert artifact_response.json()["size"] == expected_size
+
+
+class TestUploadFailureCleanup:
+    """Tests for cleanup when uploads fail."""
+
+    @pytest.mark.integration
+    @pytest.mark.requires_direct_s3
+    def test_upload_failure_invalid_project_no_orphaned_s3(
+        self, integration_client, unique_test_id
+    ):
+        """Test upload to non-existent project doesn't leave orphaned S3 objects."""
+        content = f"content for orphan s3 test {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/nonexistent-project-{unique_test_id}/nonexistent-pkg/upload",
+            files=files,
+            data={"tag": "test"},
+        )
+
+        assert response.status_code == 404
+
+        # Verify no S3 object was created
+        assert not s3_object_exists(expected_hash), (
+            "Orphaned S3 object found after failed upload"
+        )
+
+    @pytest.mark.integration
+    @pytest.mark.requires_direct_s3
+    def test_upload_failure_invalid_package_no_orphaned_s3(
+        self, integration_client, test_project, unique_test_id
+    ):
+        """Test upload to non-existent package doesn't leave orphaned S3 objects."""
+        content = f"content for orphan s3 test pkg {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{test_project}/nonexistent-package-{unique_test_id}/upload",
+            files=files,
+            data={"tag": "test"},
+        )
+
+        assert response.status_code == 404
+
+        assert not s3_object_exists(expected_hash), (
+            "Orphaned S3 object found after failed upload"
+        )
+
+    @pytest.mark.integration
+    def test_upload_failure_no_orphaned_database_records(
+        self, integration_client, test_project, unique_test_id
+    ):
+        """Test failed upload doesn't leave orphaned database records."""
+        content = f"content for db orphan test {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{test_project}/nonexistent-package-{unique_test_id}/upload",
+            files=files,
+            data={"tag": "test"},
+        )
+
+        assert response.status_code == 404
+
+        artifact_response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert artifact_response.status_code == 404, (
+            "Orphaned artifact record found after failed upload"
+        )
+
+
+class TestS3StorageVerification:
+    """Tests to verify S3 storage behavior."""
+
+    @pytest.mark.integration
+    @pytest.mark.requires_direct_s3
+    def test_s3_single_object_after_duplicates(
+        self, integration_client, test_package, unique_test_id
+    ):
+        """Test S3 bucket contains only one object after duplicate uploads."""
+        project, package = test_package
+        content = f"content for s3 object count test {unique_test_id}".encode()
+        expected_hash = compute_sha256(content)
+
+        # Upload same content multiple times
+        for tag in ["s3test1", "s3test2", "s3test3"]:
+            upload_test_file(integration_client, project, package, content, tag=tag)
+
+        # Verify only one S3 object exists
+        s3_objects = list_s3_objects_by_hash(expected_hash)
+        assert len(s3_objects) == 1, (
+            f"Expected 1 S3 object, found {len(s3_objects)}: {s3_objects}"
+        )
+
+        # Verify object key follows expected pattern
+        expected_key = (
+            f"fruits/{expected_hash[:2]}/{expected_hash[2:4]}/{expected_hash}"
+        )
+        assert s3_objects[0] == expected_key
+
+    @pytest.mark.integration
+    def test_artifact_table_single_row_after_duplicates(
+        self, integration_client, test_package
+    ):
+        """Test artifact table contains only one row after duplicate uploads."""
+        project, package = test_package
+        content = b"content for single row test"
+        expected_hash = compute_sha256(content)
+
+        # Upload same content multiple times
+        for tag in ["v1", "v2", "v3"]:
+            upload_test_file(integration_client, project, package, content, tag=tag)
+
+        # Query artifact
+        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
+        assert response.status_code == 200
+        artifact = response.json()
+        assert artifact["id"] == expected_hash
+        assert artifact["ref_count"] == 3
+
+
+class TestSecurityPathTraversal:
+    """Tests for path traversal attack prevention.
+
+    Note: Orchard uses content-addressable storage where files are stored by
+    SHA256 hash, not filename. Filenames are metadata only and never used in
+    file path construction, so path traversal in filenames is not a security
+    vulnerability. These tests verify the system handles unusual inputs safely.
+    """
+
+    @pytest.mark.integration
+    @pytest.mark.requires_direct_s3
+    def test_path_traversal_in_filename_stored_safely(
+        self, integration_client, test_package
+    ):
+        """Test filenames with path traversal are stored safely (as metadata only)."""
+        project, package = test_package
+        content = b"path traversal test content"
+        expected_hash = compute_sha256(content)
+
+        files = {
+            "file": (
+                "../../../etc/passwd",
+                io.BytesIO(content),
+                "application/octet-stream",
+            )
+        }
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            data={"tag": "traversal-test"},
+        )
+        assert response.status_code == 200
+        result = response.json()
+        assert result["artifact_id"] == expected_hash
+        s3_objects = list_s3_objects_by_hash(expected_hash)
+        assert len(s3_objects) == 1
+        assert ".." not in s3_objects[0]
+
+    @pytest.mark.integration
+    def test_path_traversal_in_package_name(self, integration_client, test_project):
+        """Test package names with path traversal sequences are rejected."""
+        response = integration_client.get(
+            f"/api/v1/project/{test_project}/packages/../../../etc/passwd"
+        )
+        assert response.status_code in [400, 404, 422]
+
+    @pytest.mark.integration
+    def test_path_traversal_in_tag_name(self, integration_client, test_package):
+        """Test tag names with path traversal are handled safely."""
+        project, package = test_package
+        content = b"tag traversal test"
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            data={"tag": "../../../etc/passwd"},
+        )
+        assert response.status_code in [200, 400, 422]
+
+    @pytest.mark.integration
+    def test_download_path_traversal_in_ref(self, integration_client, test_package):
+        """Test download ref with path traversal is rejected."""
+        project, package = test_package
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/../../../etc/passwd"
+        )
+        assert response.status_code in [400, 404, 422]
+
+    @pytest.mark.integration
+    def test_path_traversal_in_package_name(self, integration_client, test_project):
+        """Test package names with path traversal sequences are rejected."""
+        response = integration_client.get(
+            f"/api/v1/project/{test_project}/packages/../../../etc/passwd"
+        )
+        assert response.status_code in [400, 404, 422]
+
+    @pytest.mark.integration
+    def test_path_traversal_in_tag_name(self, integration_client, test_package):
+        """Test tag names with path traversal are rejected or handled safely."""
+        project, package = test_package
+        content = b"tag traversal test"
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            data={"tag": "../../../etc/passwd"},
+        )
+        assert response.status_code in [200, 400, 422]
+
+    @pytest.mark.integration
+    def test_download_path_traversal_in_ref(self, integration_client, test_package):
+        """Test download ref with path traversal is rejected."""
+        project, package = test_package
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/../../../etc/passwd"
+        )
+        assert response.status_code in [400, 404, 422]
+
+
+class TestSecurityMalformedRequests:
+    """Tests for malformed request handling."""
+
+    @pytest.mark.integration
+    def test_upload_missing_file_field(self, integration_client, test_package):
+        """Test upload without file field returns appropriate error."""
+        project, package = test_package
+
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            data={"tag": "no-file"},
+        )
+        assert response.status_code == 422
+
+    @pytest.mark.integration
+    def test_upload_null_bytes_in_filename(self, integration_client, test_package):
+        """Test filename with null bytes is handled safely."""
+        project, package = test_package
+        content = b"null byte test"
+
+        files = {
+            "file": ("test\x00.bin", io.BytesIO(content), "application/octet-stream")
+        }
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+        )
+        assert response.status_code in [200, 400, 422]
+
+    @pytest.mark.integration
+    def test_upload_very_long_filename(self, integration_client, test_package):
+        """Test very long filename is handled (truncated or rejected)."""
+        project, package = test_package
+        content = b"long filename test"
+        long_filename = "a" * 1000 + ".bin"
+
+        files = {
+            "file": (long_filename, io.BytesIO(content), "application/octet-stream")
+        }
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+        )
+        assert response.status_code in [200, 400, 413, 422]
+
+    @pytest.mark.integration
+    def test_upload_special_characters_in_filename(
+        self, integration_client, test_package
+    ):
+        """Test filenames with special characters are handled safely."""
+        project, package = test_package
+        content = b"special char test"
+
+        special_filenames = [
+            "test<script>.bin",
+            'test"quote.bin',
+            "test'apostrophe.bin",
+            "test;semicolon.bin",
+            "test|pipe.bin",
+        ]
+
+        for filename in special_filenames:
+            files = {
+                "file": (filename, io.BytesIO(content), "application/octet-stream")
+            }
+            response = integration_client.post(
+                f"/api/v1/project/{project}/{package}/upload",
+                files=files,
+            )
+            assert response.status_code in [200, 400, 422], (
+                f"Unexpected status {response.status_code} for filename: {filename}"
+            )
+
+    @pytest.mark.integration
+    def test_invalid_checksum_header_format(self, integration_client, test_package):
+        """Test invalid X-Checksum-SHA256 header format is rejected."""
+        project, package = test_package
+        content = b"checksum test"
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            headers={"X-Checksum-SHA256": "not-a-valid-hash"},
+        )
+        assert response.status_code == 400
+        assert "Invalid" in response.json().get("detail", "")
+
+    @pytest.mark.integration
+    def test_checksum_mismatch_rejected(self, integration_client, test_package):
+        """Test upload with wrong checksum is rejected."""
+        project, package = test_package
+        content = b"checksum mismatch test"
+        wrong_hash = "0" * 64
+
+        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            headers={"X-Checksum-SHA256": wrong_hash},
+        )
+        assert response.status_code == 422
+        assert "verification failed" in response.json().get("detail", "").lower()

backend/tests/integration/test_version_api.py

@@ -0,0 +1,347 @@
+"""
+Integration tests for package version API endpoints.
+
+Tests cover:
+- Version creation via upload
+- Version auto-detection from filename
+- Version listing and retrieval
+- Download by version prefix
+- Version deletion
+"""
+
+import pytest
+import io
+from tests.factories import (
+    compute_sha256,
+    upload_test_file,
+)
+
+
+class TestVersionCreation:
+    """Tests for creating versions via upload."""
+
+    @pytest.mark.integration
+    def test_upload_with_explicit_version(self, integration_client, test_package):
+        """Test upload with explicit version parameter creates version record."""
+        project, package = test_package
+        content = b"version creation test"
+        expected_hash = compute_sha256(content)
+
+        files = {"file": ("app.tar.gz", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            data={"version": "1.0.0"},
+        )
+        assert response.status_code == 200
+        result = response.json()
+        assert result["artifact_id"] == expected_hash
+        assert result.get("version") == "1.0.0"
+        assert result.get("version_source") == "explicit"
+
+    @pytest.mark.integration
+    def test_upload_with_version_and_tag(self, integration_client, test_package):
+        """Test upload with both version and tag creates both records."""
+        project, package = test_package
+        content = b"version and tag test"
+
+        files = {"file": ("app.tar.gz", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            data={"version": "2.0.0", "tag": "latest"},
+        )
+        assert response.status_code == 200
+        result = response.json()
+        assert result.get("version") == "2.0.0"
+
+        # Verify tag was also created
+        tags_response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/tags"
+        )
+        assert tags_response.status_code == 200
+        tags = tags_response.json()
+        tag_names = [t["name"] for t in tags.get("items", tags)]
+        assert "latest" in tag_names
+
+    @pytest.mark.integration
+    def test_duplicate_version_same_content_succeeds(self, integration_client, test_package):
+        """Test uploading same version with same content succeeds (deduplication)."""
+        project, package = test_package
+        content = b"version dedup test"
+
+        # First upload with version
+        files1 = {"file": ("app1.tar.gz", io.BytesIO(content), "application/octet-stream")}
+        response1 = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files1,
+            data={"version": "3.0.0"},
+        )
+        assert response1.status_code == 200
+
+        # Second upload with same version and same content succeeds
+        files2 = {"file": ("app2.tar.gz", io.BytesIO(content), "application/octet-stream")}
+        response2 = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files2,
+            data={"version": "3.0.0"},
+        )
+        # This succeeds because it's the same artifact (deduplication)
+        assert response2.status_code == 200
+
+
+class TestVersionAutoDetection:
+    """Tests for automatic version detection from filename."""
+
+    @pytest.mark.integration
+    def test_version_detected_from_filename_tarball(self, integration_client, test_package):
+        """Test version is auto-detected from tarball filename or metadata."""
+        project, package = test_package
+        content = b"auto detect version tarball"
+
+        files = {"file": ("myapp-1.2.3.tar.gz", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+        )
+        assert response.status_code == 200
+        result = response.json()
+        assert result.get("version") == "1.2.3"
+        # Version source can be 'filename' or 'metadata' depending on detection order
+        assert result.get("version_source") in ["filename", "metadata"]
+
+    @pytest.mark.integration
+    def test_version_detected_from_filename_zip(self, integration_client, test_package):
+        """Test version is auto-detected from zip filename."""
+        project, package = test_package
+        content = b"auto detect version zip"
+
+        files = {"file": ("package-2.0.0.zip", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+        )
+        assert response.status_code == 200
+        result = response.json()
+        assert result.get("version") == "2.0.0"
+        assert result.get("version_source") == "filename"
+
+    @pytest.mark.integration
+    def test_explicit_version_overrides_filename(self, integration_client, test_package):
+        """Test explicit version parameter overrides filename detection."""
+        project, package = test_package
+        content = b"explicit override test"
+
+        files = {"file": ("myapp-1.0.0.tar.gz", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            data={"version": "9.9.9"},
+        )
+        assert response.status_code == 200
+        result = response.json()
+        assert result.get("version") == "9.9.9"
+        assert result.get("version_source") == "explicit"
+
+    @pytest.mark.integration
+    def test_no_version_detected_from_plain_filename(self, integration_client, test_package):
+        """Test no version is created for filenames without version pattern."""
+        project, package = test_package
+        content = b"no version in filename"
+
+        files = {"file": ("plain-file.bin", io.BytesIO(content), "application/octet-stream")}
+        response = integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+        )
+        assert response.status_code == 200
+        result = response.json()
+        # Version should be None or not present
+        assert result.get("version") is None
+
+
+class TestVersionListing:
+    """Tests for listing and retrieving versions."""
+
+    @pytest.mark.integration
+    def test_list_versions(self, integration_client, test_package):
+        """Test listing all versions for a package."""
+        project, package = test_package
+
+        # Create multiple versions
+        for ver in ["1.0.0", "1.1.0", "2.0.0"]:
+            content = f"version {ver} content".encode()
+            files = {"file": (f"app-{ver}.tar.gz", io.BytesIO(content), "application/octet-stream")}
+            response = integration_client.post(
+                f"/api/v1/project/{project}/{package}/upload",
+                files=files,
+                data={"version": ver},
+            )
+            assert response.status_code == 200
+
+        # List versions
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/versions"
+        )
+        assert response.status_code == 200
+        data = response.json()
+        versions = [v["version"] for v in data.get("items", data)]
+        assert "1.0.0" in versions
+        assert "1.1.0" in versions
+        assert "2.0.0" in versions
+
+    @pytest.mark.integration
+    def test_get_specific_version(self, integration_client, test_package):
+        """Test getting details for a specific version."""
+        project, package = test_package
+        content = b"specific version test"
+        expected_hash = compute_sha256(content)
+
+        # Create version
+        files = {"file": ("app-4.0.0.tar.gz", io.BytesIO(content), "application/octet-stream")}
+        integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            data={"version": "4.0.0"},
+        )
+
+        # Get version details
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/versions/4.0.0"
+        )
+        assert response.status_code == 200
+        data = response.json()
+        assert data["version"] == "4.0.0"
+        assert data["artifact_id"] == expected_hash
+
+    @pytest.mark.integration
+    def test_get_nonexistent_version_returns_404(self, integration_client, test_package):
+        """Test getting nonexistent version returns 404."""
+        project, package = test_package
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/versions/99.99.99"
+        )
+        assert response.status_code == 404
+
+
+class TestDownloadByVersion:
+    """Tests for downloading artifacts by version."""
+
+    @pytest.mark.integration
+    def test_download_by_version_prefix(self, integration_client, test_package):
+        """Test downloading artifact using version: prefix."""
+        project, package = test_package
+        content = b"download by version test"
+        expected_hash = compute_sha256(content)
+
+        # Upload with version
+        files = {"file": ("app.tar.gz", io.BytesIO(content), "application/octet-stream")}
+        integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            data={"version": "5.0.0"},
+        )
+
+        # Download by version prefix
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/version:5.0.0",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == content
+
+    @pytest.mark.integration
+    def test_download_nonexistent_version_returns_404(self, integration_client, test_package):
+        """Test downloading nonexistent version returns 404."""
+        project, package = test_package
+
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/version:99.0.0"
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_version_resolution_priority(self, integration_client, test_package):
+        """Test that version: prefix explicitly resolves to version, not tag."""
+        project, package = test_package
+        version_content = b"this is the version content"
+        tag_content = b"this is the tag content"
+
+        # Create a version 6.0.0
+        files1 = {"file": ("app-v.tar.gz", io.BytesIO(version_content), "application/octet-stream")}
+        integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files1,
+            data={"version": "6.0.0"},
+        )
+
+        # Create a tag named "6.0.0" pointing to different content
+        files2 = {"file": ("app-t.tar.gz", io.BytesIO(tag_content), "application/octet-stream")}
+        integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files2,
+            data={"tag": "6.0.0"},
+        )
+
+        # Download with version: prefix should get version content
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/version:6.0.0",
+            params={"mode": "proxy"},
+        )
+        assert response.status_code == 200
+        assert response.content == version_content
+
+        # Download with tag: prefix should get tag content
+        response2 = integration_client.get(
+            f"/api/v1/project/{project}/{package}/+/tag:6.0.0",
+            params={"mode": "proxy"},
+        )
+        assert response2.status_code == 200
+        assert response2.content == tag_content
+
+
+class TestVersionDeletion:
+    """Tests for deleting versions."""
+
+    @pytest.mark.integration
+    def test_delete_version(self, integration_client, test_package):
+        """Test deleting a version."""
+        project, package = test_package
+        content = b"delete version test"
+
+        # Create version
+        files = {"file": ("app.tar.gz", io.BytesIO(content), "application/octet-stream")}
+        integration_client.post(
+            f"/api/v1/project/{project}/{package}/upload",
+            files=files,
+            data={"version": "7.0.0"},
+        )
+
+        # Verify version exists
+        response = integration_client.get(
+            f"/api/v1/project/{project}/{package}/versions/7.0.0"
+        )
+        assert response.status_code == 200
+
+        # Delete version - returns 204 No Content on success
+        delete_response = integration_client.delete(
+            f"/api/v1/project/{project}/{package}/versions/7.0.0"
+        )
+        assert delete_response.status_code == 204
+
+        # Verify version no longer exists
+        response2 = integration_client.get(
+            f"/api/v1/project/{project}/{package}/versions/7.0.0"
+        )
+        assert response2.status_code == 404
+
+    @pytest.mark.integration
+    def test_delete_nonexistent_version_returns_404(self, integration_client, test_package):
+        """Test deleting nonexistent version returns 404."""
+        project, package = test_package
+
+        response = integration_client.delete(
+            f"/api/v1/project/{project}/{package}/versions/99.0.0"
+        )
+        assert response.status_code == 404

backend/tests/integration/test_versions_api.py

@@ -0,0 +1,412 @@
+"""
+Integration tests for version API endpoints.
+
+Tests cover:
+- Version creation via upload
+- Version auto-detection from filename
+- Version listing with pagination
+- Version deletion
+- Download by version ref
+- ref_count behavior with version operations
+"""
+
+import pytest
+from tests.factories import upload_test_file
+
+
+class TestVersionCreation:
+    """Tests for version creation during upload."""
+
+    @pytest.mark.integration
+    def test_upload_with_explicit_version(self, integration_client, test_package):
+        """Test creating a version via explicit version parameter."""
+        project_name, package_name = test_package
+
+        result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"version create test",
+            tag="latest",
+            version="1.0.0",
+        )
+
+        assert result["tag"] == "latest"
+        assert result["version"] == "1.0.0"
+        assert result["version_source"] == "explicit"
+        assert result["artifact_id"]
+
+    @pytest.mark.integration
+    def test_upload_with_version_auto_detect_from_tarball(
+        self, integration_client, test_package
+    ):
+        """Test version auto-detection from tarball filename pattern."""
+        project_name, package_name = test_package
+
+        result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"auto version test",
+            filename="myapp-2.1.0.tar.gz",
+        )
+
+        assert result["version"] == "2.1.0"
+        # Tarball metadata extractor parses version from filename
+        assert result["version_source"] == "metadata"
+
+    @pytest.mark.integration
+    def test_upload_with_version_auto_detect_v_prefix(
+        self, integration_client, test_package
+    ):
+        """Test version auto-detection strips 'v' prefix from tarball filename."""
+        project_name, package_name = test_package
+
+        result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"v prefix test",
+            filename="package-v3.0.0.tar.gz",
+        )
+
+        assert result["version"] == "3.0.0"
+        # Tarball metadata extractor parses version from filename
+        assert result["version_source"] == "metadata"
+
+    @pytest.mark.integration
+    def test_upload_duplicate_version_warning(self, integration_client, test_package):
+        """Test that duplicate version during upload returns response without error."""
+        project_name, package_name = test_package
+
+        # Upload with version 1.0.0
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"first upload",
+            version="1.0.0",
+        )
+
+        # Upload different content with same version - should succeed but no new version
+        result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"second upload different content",
+            version="1.0.0",
+        )
+
+        # Upload succeeds but version may not be set (duplicate)
+        assert result["artifact_id"]
+
+
+class TestVersionCRUD:
+    """Tests for version list, get, delete operations."""
+
+    @pytest.mark.integration
+    def test_list_versions(self, integration_client, test_package):
+        """Test listing versions for a package."""
+        project_name, package_name = test_package
+
+        # Create some versions
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"v1 content",
+            version="1.0.0",
+        )
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"v2 content",
+            version="2.0.0",
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/versions"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "items" in data
+        assert "pagination" in data
+
+        versions = [v["version"] for v in data["items"]]
+        assert "1.0.0" in versions
+        assert "2.0.0" in versions
+
+    @pytest.mark.integration
+    def test_list_versions_with_artifact_info(self, integration_client, test_package):
+        """Test that version list includes artifact metadata."""
+        project_name, package_name = test_package
+
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"version with info",
+            version="1.0.0",
+            tag="release",
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/versions"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert len(data["items"]) >= 1
+
+        version_item = next(
+            (v for v in data["items"] if v["version"] == "1.0.0"), None
+        )
+        assert version_item is not None
+        assert "size" in version_item
+        assert "artifact_id" in version_item
+        assert "tags" in version_item
+        assert "release" in version_item["tags"]
+
+    @pytest.mark.integration
+    def test_get_version(self, integration_client, test_package):
+        """Test getting a specific version."""
+        project_name, package_name = test_package
+
+        upload_result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"get version test",
+            version="3.0.0",
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/versions/3.0.0"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert data["version"] == "3.0.0"
+        assert data["artifact_id"] == upload_result["artifact_id"]
+        assert data["version_source"] == "explicit"
+
+    @pytest.mark.integration
+    def test_get_version_not_found(self, integration_client, test_package):
+        """Test getting a non-existent version returns 404."""
+        project_name, package_name = test_package
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/versions/99.99.99"
+        )
+        assert response.status_code == 404
+
+    @pytest.mark.integration
+    def test_delete_version(self, integration_client, test_package):
+        """Test deleting a version."""
+        project_name, package_name = test_package
+
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"delete version test",
+            version="4.0.0",
+        )
+
+        # Delete version
+        response = integration_client.delete(
+            f"/api/v1/project/{project_name}/{package_name}/versions/4.0.0"
+        )
+        assert response.status_code == 204
+
+        # Verify deleted
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/versions/4.0.0"
+        )
+        assert response.status_code == 404
+
+
+class TestVersionDownload:
+    """Tests for downloading artifacts by version reference."""
+
+    @pytest.mark.integration
+    def test_download_by_version_prefix(self, integration_client, test_package):
+        """Test downloading an artifact using version: prefix."""
+        project_name, package_name = test_package
+        content = b"download by version test"
+
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            content,
+            version="5.0.0",
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/version:5.0.0",
+            follow_redirects=False,
+        )
+
+        # Should either redirect or return content
+        assert response.status_code in [200, 302, 307]
+
+    @pytest.mark.integration
+    def test_download_by_implicit_version(self, integration_client, test_package):
+        """Test downloading an artifact using version number directly (no prefix)."""
+        project_name, package_name = test_package
+        content = b"implicit version download test"
+
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            content,
+            version="6.0.0",
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/6.0.0",
+            follow_redirects=False,
+        )
+
+        # Should resolve version first (before tag)
+        assert response.status_code in [200, 302, 307]
+
+    @pytest.mark.integration
+    def test_version_takes_precedence_over_tag(self, integration_client, test_package):
+        """Test that version is checked before tag when resolving refs."""
+        project_name, package_name = test_package
+
+        # Upload with version "1.0"
+        version_result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"version content",
+            version="1.0",
+        )
+
+        # Create a tag with the same name "1.0" pointing to different artifact
+        tag_result = upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"tag content different",
+            tag="1.0",
+        )
+
+        # Download by "1.0" should resolve to version, not tag
+        # Since version:1.0 artifact was uploaded first
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/1.0",
+            follow_redirects=False,
+        )
+
+        assert response.status_code in [200, 302, 307]
+
+
+class TestTagVersionEnrichment:
+    """Tests for tag responses including version information."""
+
+    @pytest.mark.integration
+    def test_tag_response_includes_version(self, integration_client, test_package):
+        """Test that tag responses include version of the artifact."""
+        project_name, package_name = test_package
+
+        # Upload with both version and tag
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"enriched tag test",
+            version="7.0.0",
+            tag="stable",
+        )
+
+        # Get tag and check version field
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/tags/stable"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert data["name"] == "stable"
+        assert data["version"] == "7.0.0"
+
+    @pytest.mark.integration
+    def test_tag_list_includes_versions(self, integration_client, test_package):
+        """Test that tag list responses include version for each tag."""
+        project_name, package_name = test_package
+
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"list version test",
+            version="8.0.0",
+            tag="latest",
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/tags"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        tag_item = next((t for t in data["items"] if t["name"] == "latest"), None)
+        assert tag_item is not None
+        assert tag_item.get("version") == "8.0.0"
+
+
+class TestVersionPagination:
+    """Tests for version listing pagination and sorting."""
+
+    @pytest.mark.integration
+    def test_versions_pagination(self, integration_client, test_package):
+        """Test version listing respects pagination."""
+        project_name, package_name = test_package
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/versions?limit=5"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        assert "pagination" in data
+        assert data["pagination"]["limit"] == 5
+
+    @pytest.mark.integration
+    def test_versions_sorting(self, integration_client, test_package):
+        """Test version listing can be sorted."""
+        project_name, package_name = test_package
+
+        # Create versions with different timestamps
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"sort test 1",
+            version="1.0.0",
+        )
+        upload_test_file(
+            integration_client,
+            project_name,
+            package_name,
+            b"sort test 2",
+            version="2.0.0",
+        )
+
+        # Test ascending sort
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/versions?sort=version&order=asc"
+        )
+        assert response.status_code == 200
+
+        data = response.json()
+        versions = [v["version"] for v in data["items"]]
+        # First version should be 1.0.0 when sorted ascending
+        if len(versions) >= 2:
+            assert versions.index("1.0.0") < versions.index("2.0.0")

backend/tests/test_checksum_verification.py

@@ -0,0 +1,675 @@
+"""
+Tests for checksum calculation, verification, and download verification.
+
+This module tests:
+- SHA256 hash computation (bytes and streams)
+- HashingStreamWrapper incremental hashing
+- VerifyingStreamWrapper with verification
+- ChecksumMismatchError exception handling
+- Download verification API endpoints
+"""
+
+import pytest
+import hashlib
+import io
+from typing import Generator
+
+from app.checksum import (
+    compute_sha256,
+    compute_sha256_stream,
+    verify_checksum,
+    verify_checksum_strict,
+    is_valid_sha256,
+    sha256_to_base64,
+    HashingStreamWrapper,
+    VerifyingStreamWrapper,
+    ChecksumMismatchError,
+    ChecksumError,
+    InvalidHashFormatError,
+    DEFAULT_CHUNK_SIZE,
+)
+
+
+# =============================================================================
+# Test Data
+# =============================================================================
+
+# Known test vectors
+TEST_CONTENT_HELLO = b"Hello, World!"
+TEST_HASH_HELLO = "dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986f"
+
+TEST_CONTENT_EMPTY = b""
+TEST_HASH_EMPTY = "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
+
+TEST_CONTENT_BINARY = bytes(range(256))
+TEST_HASH_BINARY = hashlib.sha256(TEST_CONTENT_BINARY).hexdigest()
+
+# Invalid hashes for testing
+INVALID_HASH_TOO_SHORT = "abcd1234"
+INVALID_HASH_TOO_LONG = "a" * 65
+INVALID_HASH_NON_HEX = "zzzz" + "a" * 60
+INVALID_HASH_EMPTY = ""
+
+
+# =============================================================================
+# Unit Tests - SHA256 Computation
+# =============================================================================
+
+
+class TestComputeSHA256:
+    """Tests for compute_sha256 function."""
+
+    def test_known_content_matches_expected_hash(self):
+        """Test SHA256 of known content matches pre-computed hash."""
+        result = compute_sha256(TEST_CONTENT_HELLO)
+        assert result == TEST_HASH_HELLO
+
+    def test_returns_64_character_hex_string(self):
+        """Test result is exactly 64 hex characters."""
+        result = compute_sha256(TEST_CONTENT_HELLO)
+        assert len(result) == 64
+        assert all(c in "0123456789abcdef" for c in result)
+
+    def test_returns_lowercase_hex(self):
+        """Test result is lowercase."""
+        result = compute_sha256(TEST_CONTENT_HELLO)
+        assert result == result.lower()
+
+    def test_empty_content_returns_empty_hash(self):
+        """Test empty bytes returns SHA256 of empty content."""
+        result = compute_sha256(TEST_CONTENT_EMPTY)
+        assert result == TEST_HASH_EMPTY
+
+    def test_deterministic_same_input_same_output(self):
+        """Test same input always produces same output."""
+        content = b"test content for determinism"
+        result1 = compute_sha256(content)
+        result2 = compute_sha256(content)
+        assert result1 == result2
+
+    def test_different_content_different_hash(self):
+        """Test different content produces different hash."""
+        hash1 = compute_sha256(b"content A")
+        hash2 = compute_sha256(b"content B")
+        assert hash1 != hash2
+
+    def test_single_bit_change_different_hash(self):
+        """Test single bit change produces completely different hash."""
+        content1 = b"\x00" * 100
+        content2 = b"\x00" * 99 + b"\x01"
+        hash1 = compute_sha256(content1)
+        hash2 = compute_sha256(content2)
+        assert hash1 != hash2
+
+    def test_binary_content(self):
+        """Test hashing binary content with all byte values."""
+        result = compute_sha256(TEST_CONTENT_BINARY)
+        assert result == TEST_HASH_BINARY
+        assert len(result) == 64
+
+    def test_large_content(self):
+        """Test hashing larger content (1MB)."""
+        large_content = b"x" * (1024 * 1024)
+        result = compute_sha256(large_content)
+        expected = hashlib.sha256(large_content).hexdigest()
+        assert result == expected
+
+    def test_none_content_raises_error(self):
+        """Test None content raises ChecksumError."""
+        with pytest.raises(ChecksumError, match="Cannot compute hash of None"):
+            compute_sha256(None)
+
+
+class TestComputeSHA256Stream:
+    """Tests for compute_sha256_stream function."""
+
+    def test_file_like_object(self):
+        """Test hashing from file-like object."""
+        file_obj = io.BytesIO(TEST_CONTENT_HELLO)
+        result = compute_sha256_stream(file_obj)
+        assert result == TEST_HASH_HELLO
+
+    def test_iterator(self):
+        """Test hashing from iterator of chunks."""
+
+        def chunk_iterator():
+            yield b"Hello, "
+            yield b"World!"
+
+        result = compute_sha256_stream(chunk_iterator())
+        assert result == TEST_HASH_HELLO
+
+    def test_various_chunk_sizes_same_result(self):
+        """Test different chunk sizes produce same hash."""
+        content = b"x" * 10000
+        expected = hashlib.sha256(content).hexdigest()
+
+        for chunk_size in [1, 10, 100, 1000, 8192]:
+            file_obj = io.BytesIO(content)
+            result = compute_sha256_stream(file_obj, chunk_size=chunk_size)
+            assert result == expected, f"Failed for chunk_size={chunk_size}"
+
+    def test_single_byte_chunks(self):
+        """Test with 1-byte chunks (edge case)."""
+        content = b"ABC"
+        file_obj = io.BytesIO(content)
+        result = compute_sha256_stream(file_obj, chunk_size=1)
+        expected = hashlib.sha256(content).hexdigest()
+        assert result == expected
+
+    def test_empty_stream(self):
+        """Test empty stream returns empty content hash."""
+        file_obj = io.BytesIO(b"")
+        result = compute_sha256_stream(file_obj)
+        assert result == TEST_HASH_EMPTY
+
+
+# =============================================================================
+# Unit Tests - Hash Validation
+# =============================================================================
+
+
+class TestIsValidSHA256:
+    """Tests for is_valid_sha256 function."""
+
+    def test_valid_hash_lowercase(self):
+        """Test valid lowercase hash."""
+        assert is_valid_sha256(TEST_HASH_HELLO) is True
+
+    def test_valid_hash_uppercase(self):
+        """Test valid uppercase hash."""
+        assert is_valid_sha256(TEST_HASH_HELLO.upper()) is True
+
+    def test_valid_hash_mixed_case(self):
+        """Test valid mixed case hash."""
+        mixed = TEST_HASH_HELLO[:32].upper() + TEST_HASH_HELLO[32:].lower()
+        assert is_valid_sha256(mixed) is True
+
+    def test_invalid_too_short(self):
+        """Test hash that's too short."""
+        assert is_valid_sha256(INVALID_HASH_TOO_SHORT) is False
+
+    def test_invalid_too_long(self):
+        """Test hash that's too long."""
+        assert is_valid_sha256(INVALID_HASH_TOO_LONG) is False
+
+    def test_invalid_non_hex(self):
+        """Test hash with non-hex characters."""
+        assert is_valid_sha256(INVALID_HASH_NON_HEX) is False
+
+    def test_invalid_empty(self):
+        """Test empty string."""
+        assert is_valid_sha256(INVALID_HASH_EMPTY) is False
+
+    def test_invalid_none(self):
+        """Test None value."""
+        assert is_valid_sha256(None) is False
+
+
+class TestSHA256ToBase64:
+    """Tests for sha256_to_base64 function."""
+
+    def test_converts_to_base64(self):
+        """Test conversion to base64."""
+        result = sha256_to_base64(TEST_HASH_HELLO)
+        # Verify it's valid base64
+        import base64
+
+        decoded = base64.b64decode(result)
+        assert len(decoded) == 32  # SHA256 is 32 bytes
+
+    def test_invalid_hash_raises_error(self):
+        """Test invalid hash raises InvalidHashFormatError."""
+        with pytest.raises(InvalidHashFormatError):
+            sha256_to_base64(INVALID_HASH_TOO_SHORT)
+
+
+# =============================================================================
+# Unit Tests - Verification Functions
+# =============================================================================
+
+
+class TestVerifyChecksum:
+    """Tests for verify_checksum function."""
+
+    def test_matching_checksum_returns_true(self):
+        """Test matching checksum returns True."""
+        result = verify_checksum(TEST_CONTENT_HELLO, TEST_HASH_HELLO)
+        assert result is True
+
+    def test_mismatched_checksum_returns_false(self):
+        """Test mismatched checksum returns False."""
+        wrong_hash = "a" * 64
+        result = verify_checksum(TEST_CONTENT_HELLO, wrong_hash)
+        assert result is False
+
+    def test_case_insensitive_comparison(self):
+        """Test comparison is case-insensitive."""
+        result = verify_checksum(TEST_CONTENT_HELLO, TEST_HASH_HELLO.upper())
+        assert result is True
+
+    def test_invalid_hash_format_raises_error(self):
+        """Test invalid hash format raises error."""
+        with pytest.raises(InvalidHashFormatError):
+            verify_checksum(TEST_CONTENT_HELLO, INVALID_HASH_TOO_SHORT)
+
+
+class TestVerifyChecksumStrict:
+    """Tests for verify_checksum_strict function."""
+
+    def test_matching_checksum_returns_none(self):
+        """Test matching checksum doesn't raise."""
+        # Should not raise
+        verify_checksum_strict(TEST_CONTENT_HELLO, TEST_HASH_HELLO)
+
+    def test_mismatched_checksum_raises_error(self):
+        """Test mismatched checksum raises ChecksumMismatchError."""
+        wrong_hash = "a" * 64
+        with pytest.raises(ChecksumMismatchError) as exc_info:
+            verify_checksum_strict(TEST_CONTENT_HELLO, wrong_hash)
+
+        error = exc_info.value
+        assert error.expected == wrong_hash.lower()
+        assert error.actual == TEST_HASH_HELLO
+        assert error.size == len(TEST_CONTENT_HELLO)
+
+    def test_error_includes_context(self):
+        """Test error includes artifact_id and s3_key context."""
+        wrong_hash = "a" * 64
+        with pytest.raises(ChecksumMismatchError) as exc_info:
+            verify_checksum_strict(
+                TEST_CONTENT_HELLO,
+                wrong_hash,
+                artifact_id="test-artifact-123",
+                s3_key="fruits/ab/cd/abcd1234...",
+            )
+
+        error = exc_info.value
+        assert error.artifact_id == "test-artifact-123"
+        assert error.s3_key == "fruits/ab/cd/abcd1234..."
+
+
+# =============================================================================
+# Unit Tests - HashingStreamWrapper
+# =============================================================================
+
+
+class TestHashingStreamWrapper:
+    """Tests for HashingStreamWrapper class."""
+
+    def test_computes_correct_hash(self):
+        """Test wrapper computes correct hash."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrapper = HashingStreamWrapper(stream)
+
+        # Consume the stream
+        chunks = list(wrapper)
+
+        # Verify hash
+        assert wrapper.get_hash() == TEST_HASH_HELLO
+
+    def test_yields_correct_chunks(self):
+        """Test wrapper yields all content."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrapper = HashingStreamWrapper(stream)
+
+        chunks = list(wrapper)
+        content = b"".join(chunks)
+
+        assert content == TEST_CONTENT_HELLO
+
+    def test_tracks_bytes_read(self):
+        """Test bytes_read property tracks correctly."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrapper = HashingStreamWrapper(stream)
+
+        assert wrapper.bytes_read == 0
+        list(wrapper)  # Consume
+        assert wrapper.bytes_read == len(TEST_CONTENT_HELLO)
+
+    def test_get_hash_before_iteration_consumes_stream(self):
+        """Test get_hash() consumes stream if not already done."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrapper = HashingStreamWrapper(stream)
+
+        # Call get_hash without iterating
+        hash_result = wrapper.get_hash()
+
+        assert hash_result == TEST_HASH_HELLO
+        assert wrapper.bytes_read == len(TEST_CONTENT_HELLO)
+
+    def test_get_hash_if_complete_before_iteration_returns_none(self):
+        """Test get_hash_if_complete returns None before iteration."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrapper = HashingStreamWrapper(stream)
+
+        assert wrapper.get_hash_if_complete() is None
+
+    def test_get_hash_if_complete_after_iteration_returns_hash(self):
+        """Test get_hash_if_complete returns hash after iteration."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrapper = HashingStreamWrapper(stream)
+
+        list(wrapper)  # Consume
+        assert wrapper.get_hash_if_complete() == TEST_HASH_HELLO
+
+    def test_custom_chunk_size(self):
+        """Test custom chunk size is respected."""
+        content = b"x" * 1000
+        stream = io.BytesIO(content)
+        wrapper = HashingStreamWrapper(stream, chunk_size=100)
+
+        chunks = list(wrapper)
+
+        # Each chunk should be at most 100 bytes
+        for chunk in chunks[:-1]:  # All but last
+            assert len(chunk) == 100
+
+        # Total content should match
+        assert b"".join(chunks) == content
+
+    def test_iterator_interface(self):
+        """Test wrapper supports iterator interface."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrapper = HashingStreamWrapper(stream)
+
+        # Should be able to use for loop
+        result = b""
+        for chunk in wrapper:
+            result += chunk
+
+        assert result == TEST_CONTENT_HELLO
+
+
+# =============================================================================
+# Unit Tests - VerifyingStreamWrapper
+# =============================================================================
+
+
+class TestVerifyingStreamWrapper:
+    """Tests for VerifyingStreamWrapper class."""
+
+    def test_verify_success(self):
+        """Test verification succeeds for matching content."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrapper = VerifyingStreamWrapper(stream, TEST_HASH_HELLO)
+
+        # Consume stream
+        list(wrapper)
+
+        # Verify should succeed
+        result = wrapper.verify()
+        assert result is True
+        assert wrapper.is_verified is True
+
+    def test_verify_failure_raises_error(self):
+        """Test verification failure raises ChecksumMismatchError."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrong_hash = "a" * 64
+        wrapper = VerifyingStreamWrapper(stream, wrong_hash)
+
+        # Consume stream
+        list(wrapper)
+
+        # Verify should fail
+        with pytest.raises(ChecksumMismatchError):
+            wrapper.verify()
+
+        assert wrapper.is_verified is False
+
+    def test_verify_silent_success(self):
+        """Test verify_silent returns True on success."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrapper = VerifyingStreamWrapper(stream, TEST_HASH_HELLO)
+
+        list(wrapper)
+
+        result = wrapper.verify_silent()
+        assert result is True
+
+    def test_verify_silent_failure(self):
+        """Test verify_silent returns False on failure."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrong_hash = "a" * 64
+        wrapper = VerifyingStreamWrapper(stream, wrong_hash)
+
+        list(wrapper)
+
+        result = wrapper.verify_silent()
+        assert result is False
+
+    def test_invalid_expected_hash_raises_error(self):
+        """Test invalid expected hash raises error at construction."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+
+        with pytest.raises(InvalidHashFormatError):
+            VerifyingStreamWrapper(stream, INVALID_HASH_TOO_SHORT)
+
+    def test_on_failure_callback(self):
+        """Test on_failure callback is called on verification failure."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrong_hash = "a" * 64
+
+        callback_called = []
+
+        def on_failure(error):
+            callback_called.append(error)
+
+        wrapper = VerifyingStreamWrapper(stream, wrong_hash, on_failure=on_failure)
+
+        list(wrapper)
+
+        with pytest.raises(ChecksumMismatchError):
+            wrapper.verify()
+
+        assert len(callback_called) == 1
+        assert isinstance(callback_called[0], ChecksumMismatchError)
+
+    def test_get_actual_hash_after_iteration(self):
+        """Test get_actual_hash returns hash after iteration."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrapper = VerifyingStreamWrapper(stream, TEST_HASH_HELLO)
+
+        # Before iteration
+        assert wrapper.get_actual_hash() is None
+
+        list(wrapper)
+
+        # After iteration
+        assert wrapper.get_actual_hash() == TEST_HASH_HELLO
+
+    def test_includes_context_in_error(self):
+        """Test error includes artifact_id and s3_key."""
+        stream = io.BytesIO(TEST_CONTENT_HELLO)
+        wrong_hash = "a" * 64
+        wrapper = VerifyingStreamWrapper(
+            stream,
+            wrong_hash,
+            artifact_id="test-artifact",
+            s3_key="test/key",
+        )
+
+        list(wrapper)
+
+        with pytest.raises(ChecksumMismatchError) as exc_info:
+            wrapper.verify()
+
+        error = exc_info.value
+        assert error.artifact_id == "test-artifact"
+        assert error.s3_key == "test/key"
+
+
+# =============================================================================
+# Unit Tests - ChecksumMismatchError
+# =============================================================================
+
+
+class TestChecksumMismatchError:
+    """Tests for ChecksumMismatchError class."""
+
+    def test_to_dict(self):
+        """Test to_dict returns proper dictionary."""
+        error = ChecksumMismatchError(
+            expected="a" * 64,
+            actual="b" * 64,
+            artifact_id="test-123",
+            s3_key="test/key",
+            size=1024,
+        )
+
+        result = error.to_dict()
+
+        assert result["error"] == "checksum_mismatch"
+        assert result["expected"] == "a" * 64
+        assert result["actual"] == "b" * 64
+        assert result["artifact_id"] == "test-123"
+        assert result["s3_key"] == "test/key"
+        assert result["size"] == 1024
+
+    def test_message_format(self):
+        """Test error message format."""
+        error = ChecksumMismatchError(
+            expected="a" * 64,
+            actual="b" * 64,
+        )
+
+        assert "verification failed" in str(error).lower()
+        assert "expected" in str(error).lower()
+
+    def test_custom_message(self):
+        """Test custom message is used."""
+        error = ChecksumMismatchError(
+            expected="a" * 64,
+            actual="b" * 64,
+            message="Custom error message",
+        )
+
+        assert str(error) == "Custom error message"
+
+
+# =============================================================================
+# Corruption Simulation Tests
+# =============================================================================
+
+
+class TestCorruptionDetection:
+    """Tests for detecting corrupted content."""
+
+    def test_detect_truncated_content(self):
+        """Test detection of truncated content."""
+        original = TEST_CONTENT_HELLO
+        truncated = original[:-1]  # Remove last byte
+
+        original_hash = compute_sha256(original)
+        truncated_hash = compute_sha256(truncated)
+
+        assert original_hash != truncated_hash
+        assert verify_checksum(truncated, original_hash) is False
+
+    def test_detect_extra_bytes(self):
+        """Test detection of content with extra bytes."""
+        original = TEST_CONTENT_HELLO
+        extended = original + b"\x00"  # Add null byte
+
+        original_hash = compute_sha256(original)
+
+        assert verify_checksum(extended, original_hash) is False
+
+    def test_detect_single_bit_flip(self):
+        """Test detection of single bit flip."""
+        original = TEST_CONTENT_HELLO
+        # Flip first bit of first byte
+        corrupted = bytes([original[0] ^ 0x01]) + original[1:]
+
+        original_hash = compute_sha256(original)
+
+        assert verify_checksum(corrupted, original_hash) is False
+
+    def test_detect_wrong_content(self):
+        """Test detection of completely different content."""
+        original = TEST_CONTENT_HELLO
+        different = b"Something completely different"
+
+        original_hash = compute_sha256(original)
+
+        assert verify_checksum(different, original_hash) is False
+
+    def test_detect_empty_vs_nonempty(self):
+        """Test detection of empty content vs non-empty."""
+        original = TEST_CONTENT_HELLO
+        empty = b""
+
+        original_hash = compute_sha256(original)
+
+        assert verify_checksum(empty, original_hash) is False
+
+    def test_streaming_detection_of_corruption(self):
+        """Test VerifyingStreamWrapper detects corruption."""
+        original = b"Original content that will be corrupted"
+        original_hash = compute_sha256(original)
+
+        # Corrupt the content
+        corrupted = b"Corrupted content that is different"
+        stream = io.BytesIO(corrupted)
+
+        wrapper = VerifyingStreamWrapper(stream, original_hash)
+        list(wrapper)  # Consume
+
+        with pytest.raises(ChecksumMismatchError):
+            wrapper.verify()
+
+
+# =============================================================================
+# Edge Case Tests
+# =============================================================================
+
+
+class TestEdgeCases:
+    """Tests for edge cases and boundary conditions."""
+
+    def test_null_bytes_in_content(self):
+        """Test content with null bytes."""
+        content = b"\x00\x00\x00"
+        hash_result = compute_sha256(content)
+
+        assert verify_checksum(content, hash_result) is True
+
+    def test_whitespace_only_content(self):
+        """Test content with only whitespace."""
+        content = b"   \t\n\r   "
+        hash_result = compute_sha256(content)
+
+        assert verify_checksum(content, hash_result) is True
+
+    def test_large_content_streaming(self):
+        """Test streaming verification of large content."""
+        # 1MB of content
+        large_content = b"x" * (1024 * 1024)
+        expected_hash = compute_sha256(large_content)
+
+        stream = io.BytesIO(large_content)
+        wrapper = VerifyingStreamWrapper(stream, expected_hash)
+
+        # Consume and verify
+        chunks = list(wrapper)
+        assert wrapper.verify() is True
+        assert b"".join(chunks) == large_content
+
+    def test_unicode_bytes_content(self):
+        """Test content with unicode bytes."""
+        content = "Hello, 世界! 🌍".encode("utf-8")
+        hash_result = compute_sha256(content)
+
+        assert verify_checksum(content, hash_result) is True
+
+    def test_maximum_chunk_size_larger_than_content(self):
+        """Test chunk size larger than content."""
+        content = b"small"
+        stream = io.BytesIO(content)
+        wrapper = HashingStreamWrapper(stream, chunk_size=1024 * 1024)
+
+        chunks = list(wrapper)
+
+        assert len(chunks) == 1
+        assert chunks[0] == content
+        assert wrapper.get_hash() == compute_sha256(content)

backend/tests/test_download_verification.py

@@ -0,0 +1,460 @@
+"""
+Integration tests for download verification API endpoints.
+
+These tests verify:
+- Checksum headers in download responses
+- Pre-verification mode
+- Streaming verification mode
+- HEAD request headers
+- Verification failure handling
+"""
+
+import pytest
+import hashlib
+import base64
+import io
+
+
+# =============================================================================
+# Test Fixtures
+# =============================================================================
+
+
+@pytest.fixture
+def upload_test_file(integration_client):
+    """
+    Factory fixture to upload a test file and return its artifact ID.
+
+    Usage:
+        artifact_id = upload_test_file(project, package, content, tag="v1.0")
+    """
+
+    def _upload(project_name: str, package_name: str, content: bytes, tag: str = None):
+        files = {
+            "file": ("test-file.bin", io.BytesIO(content), "application/octet-stream")
+        }
+        data = {}
+        if tag:
+            data["tag"] = tag
+
+        response = integration_client.post(
+            f"/api/v1/project/{project_name}/{package_name}/upload",
+            files=files,
+            data=data,
+        )
+        assert response.status_code == 200, f"Upload failed: {response.text}"
+        return response.json()["artifact_id"]
+
+    return _upload
+
+
+# =============================================================================
+# Integration Tests - Download Headers
+# =============================================================================
+
+
+class TestDownloadChecksumHeaders:
+    """Tests for checksum headers in download responses."""
+
+    @pytest.mark.integration
+    def test_download_includes_sha256_header(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test download response includes X-Checksum-SHA256 header."""
+        project_name, package_name = test_package
+        content = b"Content for SHA256 header test"
+
+        # Upload file
+        artifact_id = upload_test_file(
+            project_name, package_name, content, tag="sha256-header-test"
+        )
+
+        # Download with proxy mode
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/sha256-header-test",
+            params={"mode": "proxy"},
+        )
+
+        assert response.status_code == 200
+        assert "X-Checksum-SHA256" in response.headers
+        assert response.headers["X-Checksum-SHA256"] == artifact_id
+
+    @pytest.mark.integration
+    def test_download_includes_etag_header(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test download response includes ETag header."""
+        project_name, package_name = test_package
+        content = b"Content for ETag header test"
+
+        artifact_id = upload_test_file(
+            project_name, package_name, content, tag="etag-test"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/etag-test",
+            params={"mode": "proxy"},
+        )
+
+        assert response.status_code == 200
+        assert "ETag" in response.headers
+        # ETag should be quoted artifact ID
+        assert response.headers["ETag"] == f'"{artifact_id}"'
+
+    @pytest.mark.integration
+    def test_download_includes_digest_header(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test download response includes RFC 3230 Digest header."""
+        project_name, package_name = test_package
+        content = b"Content for Digest header test"
+        sha256 = hashlib.sha256(content).hexdigest()
+
+        upload_test_file(project_name, package_name, content, tag="digest-test")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/digest-test",
+            params={"mode": "proxy"},
+        )
+
+        assert response.status_code == 200
+        assert "Digest" in response.headers
+
+        # Verify Digest format: sha-256=<base64>
+        digest = response.headers["Digest"]
+        assert digest.startswith("sha-256=")
+
+        # Verify base64 content matches
+        b64_hash = digest.split("=", 1)[1]
+        decoded = base64.b64decode(b64_hash)
+        assert decoded == bytes.fromhex(sha256)
+
+    @pytest.mark.integration
+    def test_download_includes_content_length_header(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test download response includes X-Content-Length header."""
+        project_name, package_name = test_package
+        content = b"Content for X-Content-Length test"
+
+        upload_test_file(project_name, package_name, content, tag="content-length-test")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/content-length-test",
+            params={"mode": "proxy"},
+        )
+
+        assert response.status_code == 200
+        assert "X-Content-Length" in response.headers
+        assert response.headers["X-Content-Length"] == str(len(content))
+
+    @pytest.mark.integration
+    def test_download_includes_verified_header_false(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test download without verification has X-Verified: false."""
+        project_name, package_name = test_package
+        content = b"Content for X-Verified false test"
+
+        upload_test_file(project_name, package_name, content, tag="verified-false-test")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/verified-false-test",
+            params={"mode": "proxy", "verify": "false"},
+        )
+
+        assert response.status_code == 200
+        assert "X-Verified" in response.headers
+        assert response.headers["X-Verified"] == "false"
+
+
+# =============================================================================
+# Integration Tests - Pre-Verification Mode
+# =============================================================================
+
+
+class TestPreVerificationMode:
+    """Tests for pre-verification download mode."""
+
+    @pytest.mark.integration
+    def test_pre_verify_success(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test pre-verification mode succeeds for valid content."""
+        project_name, package_name = test_package
+        content = b"Content for pre-verification success test"
+
+        upload_test_file(project_name, package_name, content, tag="pre-verify-success")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/pre-verify-success",
+            params={"mode": "proxy", "verify": "true", "verify_mode": "pre"},
+        )
+
+        assert response.status_code == 200
+        assert response.content == content
+        assert "X-Verified" in response.headers
+        assert response.headers["X-Verified"] == "true"
+
+    @pytest.mark.integration
+    def test_pre_verify_returns_complete_content(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test pre-verification returns complete content."""
+        project_name, package_name = test_package
+        # Use binary content to verify no corruption
+        content = bytes(range(256)) * 10  # 2560 bytes of all byte values
+
+        upload_test_file(project_name, package_name, content, tag="pre-verify-content")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/pre-verify-content",
+            params={"mode": "proxy", "verify": "true", "verify_mode": "pre"},
+        )
+
+        assert response.status_code == 200
+        assert response.content == content
+
+
+# =============================================================================
+# Integration Tests - Streaming Verification Mode
+# =============================================================================
+
+
+class TestStreamingVerificationMode:
+    """Tests for streaming verification download mode."""
+
+    @pytest.mark.integration
+    def test_stream_verify_success(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test streaming verification mode succeeds for valid content."""
+        project_name, package_name = test_package
+        content = b"Content for streaming verification success test"
+
+        upload_test_file(
+            project_name, package_name, content, tag="stream-verify-success"
+        )
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/stream-verify-success",
+            params={"mode": "proxy", "verify": "true", "verify_mode": "stream"},
+        )
+
+        assert response.status_code == 200
+        assert response.content == content
+        # X-Verified is "pending" for streaming mode (verified after transfer)
+        assert "X-Verified" in response.headers
+
+    @pytest.mark.integration
+    def test_stream_verify_large_content(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test streaming verification with larger content."""
+        project_name, package_name = test_package
+        # 100KB of content
+        content = b"x" * (100 * 1024)
+
+        upload_test_file(project_name, package_name, content, tag="stream-verify-large")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/stream-verify-large",
+            params={"mode": "proxy", "verify": "true", "verify_mode": "stream"},
+        )
+
+        assert response.status_code == 200
+        assert response.content == content
+
+
+# =============================================================================
+# Integration Tests - HEAD Request Headers
+# =============================================================================
+
+
+class TestHeadRequestHeaders:
+    """Tests for HEAD request checksum headers."""
+
+    @pytest.mark.integration
+    def test_head_includes_sha256_header(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test HEAD request includes X-Checksum-SHA256 header."""
+        project_name, package_name = test_package
+        content = b"Content for HEAD SHA256 test"
+
+        artifact_id = upload_test_file(
+            project_name, package_name, content, tag="head-sha256-test"
+        )
+
+        response = integration_client.head(
+            f"/api/v1/project/{project_name}/{package_name}/+/head-sha256-test"
+        )
+
+        assert response.status_code == 200
+        assert "X-Checksum-SHA256" in response.headers
+        assert response.headers["X-Checksum-SHA256"] == artifact_id
+
+    @pytest.mark.integration
+    def test_head_includes_etag(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test HEAD request includes ETag header."""
+        project_name, package_name = test_package
+        content = b"Content for HEAD ETag test"
+
+        artifact_id = upload_test_file(
+            project_name, package_name, content, tag="head-etag-test"
+        )
+
+        response = integration_client.head(
+            f"/api/v1/project/{project_name}/{package_name}/+/head-etag-test"
+        )
+
+        assert response.status_code == 200
+        assert "ETag" in response.headers
+        assert response.headers["ETag"] == f'"{artifact_id}"'
+
+    @pytest.mark.integration
+    def test_head_includes_digest(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test HEAD request includes Digest header."""
+        project_name, package_name = test_package
+        content = b"Content for HEAD Digest test"
+
+        upload_test_file(project_name, package_name, content, tag="head-digest-test")
+
+        response = integration_client.head(
+            f"/api/v1/project/{project_name}/{package_name}/+/head-digest-test"
+        )
+
+        assert response.status_code == 200
+        assert "Digest" in response.headers
+        assert response.headers["Digest"].startswith("sha-256=")
+
+    @pytest.mark.integration
+    def test_head_includes_content_length(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test HEAD request includes X-Content-Length header."""
+        project_name, package_name = test_package
+        content = b"Content for HEAD Content-Length test"
+
+        upload_test_file(project_name, package_name, content, tag="head-length-test")
+
+        response = integration_client.head(
+            f"/api/v1/project/{project_name}/{package_name}/+/head-length-test"
+        )
+
+        assert response.status_code == 200
+        assert "X-Content-Length" in response.headers
+        assert response.headers["X-Content-Length"] == str(len(content))
+
+    @pytest.mark.integration
+    def test_head_no_body(self, integration_client, test_package, upload_test_file):
+        """Test HEAD request returns no body."""
+        project_name, package_name = test_package
+        content = b"Content for HEAD no-body test"
+
+        upload_test_file(project_name, package_name, content, tag="head-no-body-test")
+
+        response = integration_client.head(
+            f"/api/v1/project/{project_name}/{package_name}/+/head-no-body-test"
+        )
+
+        assert response.status_code == 200
+        assert response.content == b""
+
+
+# =============================================================================
+# Integration Tests - Range Requests
+# =============================================================================
+
+
+class TestRangeRequestHeaders:
+    """Tests for range request handling with checksum headers."""
+
+    @pytest.mark.integration
+    def test_range_request_includes_checksum_headers(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test range request includes checksum headers."""
+        project_name, package_name = test_package
+        content = b"Content for range request checksum header test"
+
+        upload_test_file(project_name, package_name, content, tag="range-checksum-test")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/range-checksum-test",
+            headers={"Range": "bytes=0-9"},
+            params={"mode": "proxy"},
+        )
+
+        assert response.status_code == 206
+        assert "X-Checksum-SHA256" in response.headers
+        # Checksum is for the FULL file, not the range
+        assert len(response.headers["X-Checksum-SHA256"]) == 64
+
+
+# =============================================================================
+# Integration Tests - Client-Side Verification
+# =============================================================================
+
+
+class TestClientSideVerification:
+    """Tests demonstrating client-side verification using headers."""
+
+    @pytest.mark.integration
+    def test_client_can_verify_downloaded_content(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test client can verify downloaded content using header."""
+        project_name, package_name = test_package
+        content = b"Content for client-side verification test"
+
+        upload_test_file(project_name, package_name, content, tag="client-verify-test")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/client-verify-test",
+            params={"mode": "proxy"},
+        )
+
+        assert response.status_code == 200
+
+        # Get expected hash from header
+        expected_hash = response.headers["X-Checksum-SHA256"]
+
+        # Compute actual hash of downloaded content
+        actual_hash = hashlib.sha256(response.content).hexdigest()
+
+        # Verify match
+        assert actual_hash == expected_hash
+
+    @pytest.mark.integration
+    def test_client_can_verify_using_digest_header(
+        self, integration_client, test_package, upload_test_file
+    ):
+        """Test client can verify using RFC 3230 Digest header."""
+        project_name, package_name = test_package
+        content = b"Content for Digest header verification"
+
+        upload_test_file(project_name, package_name, content, tag="digest-verify-test")
+
+        response = integration_client.get(
+            f"/api/v1/project/{project_name}/{package_name}/+/digest-verify-test",
+            params={"mode": "proxy"},
+        )
+
+        assert response.status_code == 200
+
+        # Parse Digest header
+        digest_header = response.headers["Digest"]
+        assert digest_header.startswith("sha-256=")
+        b64_hash = digest_header.split("=", 1)[1]
+        expected_hash_bytes = base64.b64decode(b64_hash)
+
+        # Compute actual hash of downloaded content
+        actual_hash_bytes = hashlib.sha256(response.content).digest()
+
+        # Verify match
+        assert actual_hash_bytes == expected_hash_bytes

backend/tests/test_duplicate_detection.py

@@ -1,207 +0,0 @@
-"""
-Unit tests for duplicate detection and deduplication logic.
-
-Tests cover:
-- _exists() method correctly identifies existing S3 keys
-- S3 key generation follows expected pattern
-- Storage layer skips upload when artifact already exists
-- Storage layer performs upload when artifact does not exist
-"""
-
-import pytest
-import io
-from unittest.mock import MagicMock, patch
-from tests.conftest import (
-    compute_sha256,
-    TEST_CONTENT_HELLO,
-    TEST_HASH_HELLO,
-)
-
-
-class TestExistsMethod:
-    """Tests for the _exists() method that checks S3 object existence."""
-
-    @pytest.mark.unit
-    def test_exists_returns_true_for_existing_key(self, mock_storage, mock_s3_client):
-        """Test _exists() returns True when object exists."""
-        # Pre-populate the mock storage
-        test_key = "fruits/df/fd/test-hash"
-        mock_s3_client.objects[test_key] = b"content"
-
-        result = mock_storage._exists(test_key)
-
-        assert result is True
-
-    @pytest.mark.unit
-    def test_exists_returns_false_for_nonexistent_key(self, mock_storage):
-        """Test _exists() returns False when object doesn't exist."""
-        result = mock_storage._exists("fruits/no/ne/nonexistent-key")
-
-        assert result is False
-
-    @pytest.mark.unit
-    def test_exists_handles_404_error(self, mock_storage):
-        """Test _exists() handles 404 errors gracefully."""
-        # The mock client raises ClientError for nonexistent keys
-        result = mock_storage._exists("fruits/xx/yy/does-not-exist")
-
-        assert result is False
-
-
-class TestS3KeyGeneration:
-    """Tests for S3 key pattern generation."""
-
-    @pytest.mark.unit
-    def test_s3_key_pattern(self):
-        """Test S3 key follows pattern: fruits/{hash[:2]}/{hash[2:4]}/{hash}"""
-        test_hash = "abcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890"
-
-        expected_key = f"fruits/{test_hash[:2]}/{test_hash[2:4]}/{test_hash}"
-        # Expected: fruits/ab/cd/abcdef1234567890...
-
-        assert expected_key == f"fruits/ab/cd/{test_hash}"
-
-    @pytest.mark.unit
-    def test_s3_key_generation_in_storage(self, mock_storage):
-        """Test storage layer generates correct S3 key."""
-        content = TEST_CONTENT_HELLO
-        file_obj = io.BytesIO(content)
-
-        result = mock_storage._store_simple(file_obj)
-
-        expected_key = (
-            f"fruits/{TEST_HASH_HELLO[:2]}/{TEST_HASH_HELLO[2:4]}/{TEST_HASH_HELLO}"
-        )
-        assert result.s3_key == expected_key
-
-    @pytest.mark.unit
-    def test_s3_key_uses_sha256_hash(self, mock_storage):
-        """Test S3 key is derived from SHA256 hash."""
-        content = b"unique test content for key test"
-        file_obj = io.BytesIO(content)
-        expected_hash = compute_sha256(content)
-
-        result = mock_storage._store_simple(file_obj)
-
-        # Key should contain the hash
-        assert expected_hash in result.s3_key
-
-
-class TestDeduplicationBehavior:
-    """Tests for deduplication (skip upload when exists)."""
-
-    @pytest.mark.unit
-    def test_skips_upload_when_exists(self, mock_storage, mock_s3_client):
-        """Test storage skips S3 upload when artifact already exists."""
-        content = TEST_CONTENT_HELLO
-        s3_key = (
-            f"fruits/{TEST_HASH_HELLO[:2]}/{TEST_HASH_HELLO[2:4]}/{TEST_HASH_HELLO}"
-        )
-
-        # Pre-populate storage (simulate existing artifact)
-        mock_s3_client.objects[s3_key] = content
-
-        # Track put_object calls
-        original_put = mock_s3_client.put_object
-        put_called = []
-
-        def tracked_put(*args, **kwargs):
-            put_called.append(True)
-            return original_put(*args, **kwargs)
-
-        mock_s3_client.put_object = tracked_put
-
-        # Store the same content
-        file_obj = io.BytesIO(content)
-        result = mock_storage._store_simple(file_obj)
-
-        # put_object should NOT have been called (deduplication)
-        assert len(put_called) == 0
-        assert result.sha256 == TEST_HASH_HELLO
-
-    @pytest.mark.unit
-    def test_uploads_when_not_exists(self, mock_storage, mock_s3_client):
-        """Test storage uploads to S3 when artifact doesn't exist."""
-        content = b"brand new unique content"
-        content_hash = compute_sha256(content)
-        s3_key = f"fruits/{content_hash[:2]}/{content_hash[2:4]}/{content_hash}"
-
-        # Ensure object doesn't exist
-        assert s3_key not in mock_s3_client.objects
-
-        # Store the content
-        file_obj = io.BytesIO(content)
-        result = mock_storage._store_simple(file_obj)
-
-        # Object should now exist in mock storage
-        assert s3_key in mock_s3_client.objects
-        assert mock_s3_client.objects[s3_key] == content
-
-    @pytest.mark.unit
-    def test_returns_same_hash_for_duplicate(self, mock_storage, mock_s3_client):
-        """Test storing same content twice returns same hash."""
-        content = b"content to be stored twice"
-
-        # First store
-        file1 = io.BytesIO(content)
-        result1 = mock_storage._store_simple(file1)
-
-        # Second store (duplicate)
-        file2 = io.BytesIO(content)
-        result2 = mock_storage._store_simple(file2)
-
-        assert result1.sha256 == result2.sha256
-        assert result1.s3_key == result2.s3_key
-
-    @pytest.mark.unit
-    def test_different_content_different_keys(self, mock_storage):
-        """Test different content produces different S3 keys."""
-        content1 = b"first content"
-        content2 = b"second content"
-
-        file1 = io.BytesIO(content1)
-        result1 = mock_storage._store_simple(file1)
-
-        file2 = io.BytesIO(content2)
-        result2 = mock_storage._store_simple(file2)
-
-        assert result1.sha256 != result2.sha256
-        assert result1.s3_key != result2.s3_key
-
-
-class TestDeduplicationEdgeCases:
-    """Edge case tests for deduplication."""
-
-    @pytest.mark.unit
-    def test_same_content_different_filenames(self, mock_storage):
-        """Test same content with different metadata is deduplicated."""
-        content = b"identical content"
-
-        # Store with "filename1"
-        file1 = io.BytesIO(content)
-        result1 = mock_storage._store_simple(file1)
-
-        # Store with "filename2" (same content)
-        file2 = io.BytesIO(content)
-        result2 = mock_storage._store_simple(file2)
-
-        # Both should have same hash (content-addressable)
-        assert result1.sha256 == result2.sha256
-
-    @pytest.mark.unit
-    def test_whitespace_only_difference(self, mock_storage):
-        """Test content differing only by whitespace produces different hashes."""
-        content1 = b"test content"
-        content2 = b"test  content"  # Extra space
-        content3 = b"test content "  # Trailing space
-
-        file1 = io.BytesIO(content1)
-        file2 = io.BytesIO(content2)
-        file3 = io.BytesIO(content3)
-
-        result1 = mock_storage._store_simple(file1)
-        result2 = mock_storage._store_simple(file2)
-        result3 = mock_storage._store_simple(file3)
-
-        # All should be different (content-addressable)
-        assert len({result1.sha256, result2.sha256, result3.sha256}) == 3

backend/tests/test_hash_calculation.py

@@ -1,215 +0,0 @@
-"""
-Unit tests for SHA256 hash calculation and deduplication logic.
-
-Tests cover:
-- Hash computation produces consistent results
-- Hash is always 64 character lowercase hexadecimal
-- Different content produces different hashes
-- Binary content handling
-- Large file handling (streaming)
-"""
-
-import pytest
-import hashlib
-import io
-from tests.conftest import (
-    create_test_file,
-    compute_sha256,
-    TEST_CONTENT_HELLO,
-    TEST_HASH_HELLO,
-    TEST_CONTENT_BINARY,
-    TEST_HASH_BINARY,
-)
-
-
-class TestHashComputation:
-    """Unit tests for hash calculation functionality."""
-
-    @pytest.mark.unit
-    def test_sha256_consistent_results(self):
-        """Test SHA256 hash produces consistent results for identical content."""
-        content = b"test content for hashing"
-
-        # Compute hash multiple times
-        hash1 = compute_sha256(content)
-        hash2 = compute_sha256(content)
-        hash3 = compute_sha256(content)
-
-        assert hash1 == hash2 == hash3
-
-    @pytest.mark.unit
-    def test_sha256_different_content_different_hash(self):
-        """Test SHA256 produces different hashes for different content."""
-        content1 = b"content version 1"
-        content2 = b"content version 2"
-
-        hash1 = compute_sha256(content1)
-        hash2 = compute_sha256(content2)
-
-        assert hash1 != hash2
-
-    @pytest.mark.unit
-    def test_sha256_format_64_char_hex(self):
-        """Test SHA256 hash is always 64 character lowercase hexadecimal."""
-        test_cases = [
-            b"",  # Empty
-            b"a",  # Single char
-            b"Hello, World!",  # Normal string
-            bytes(range(256)),  # All byte values
-            b"x" * 10000,  # Larger content
-        ]
-
-        for content in test_cases:
-            hash_value = compute_sha256(content)
-
-            # Check length
-            assert len(hash_value) == 64, (
-                f"Hash length should be 64, got {len(hash_value)}"
-            )
-
-            # Check lowercase
-            assert hash_value == hash_value.lower(), "Hash should be lowercase"
-
-            # Check hexadecimal
-            assert all(c in "0123456789abcdef" for c in hash_value), (
-                "Hash should be hex"
-            )
-
-    @pytest.mark.unit
-    def test_sha256_known_value(self):
-        """Test SHA256 produces expected hash for known input."""
-        assert compute_sha256(TEST_CONTENT_HELLO) == TEST_HASH_HELLO
-
-    @pytest.mark.unit
-    def test_sha256_binary_content(self):
-        """Test SHA256 handles binary content correctly."""
-        assert compute_sha256(TEST_CONTENT_BINARY) == TEST_HASH_BINARY
-
-        # Test with null bytes
-        content_with_nulls = b"\x00\x00test\x00\x00"
-        hash_value = compute_sha256(content_with_nulls)
-        assert len(hash_value) == 64
-
-    @pytest.mark.unit
-    def test_sha256_streaming_computation(self):
-        """Test SHA256 can be computed in chunks (streaming)."""
-        # Large content
-        chunk_size = 8192
-        total_size = chunk_size * 10  # 80KB
-        content = b"x" * total_size
-
-        # Direct computation
-        direct_hash = compute_sha256(content)
-
-        # Streaming computation
-        hasher = hashlib.sha256()
-        for i in range(0, total_size, chunk_size):
-            hasher.update(content[i : i + chunk_size])
-        streaming_hash = hasher.hexdigest()
-
-        assert direct_hash == streaming_hash
-
-    @pytest.mark.unit
-    def test_sha256_order_matters(self):
-        """Test that content order affects hash (not just content set)."""
-        content1 = b"AB"
-        content2 = b"BA"
-
-        assert compute_sha256(content1) != compute_sha256(content2)
-
-
-class TestStorageHashComputation:
-    """Tests for hash computation in the storage layer."""
-
-    @pytest.mark.unit
-    def test_storage_computes_sha256(self, mock_storage):
-        """Test storage layer correctly computes SHA256 hash."""
-        content = TEST_CONTENT_HELLO
-        file_obj = io.BytesIO(content)
-
-        result = mock_storage._store_simple(file_obj)
-
-        assert result.sha256 == TEST_HASH_HELLO
-
-    @pytest.mark.unit
-    def test_storage_computes_md5(self, mock_storage):
-        """Test storage layer also computes MD5 hash."""
-        content = TEST_CONTENT_HELLO
-        file_obj = io.BytesIO(content)
-
-        result = mock_storage._store_simple(file_obj)
-
-        expected_md5 = hashlib.md5(content).hexdigest()
-        assert result.md5 == expected_md5
-
-    @pytest.mark.unit
-    def test_storage_computes_sha1(self, mock_storage):
-        """Test storage layer also computes SHA1 hash."""
-        content = TEST_CONTENT_HELLO
-        file_obj = io.BytesIO(content)
-
-        result = mock_storage._store_simple(file_obj)
-
-        expected_sha1 = hashlib.sha1(content).hexdigest()
-        assert result.sha1 == expected_sha1
-
-    @pytest.mark.unit
-    def test_storage_returns_correct_size(self, mock_storage):
-        """Test storage layer returns correct file size."""
-        content = b"test content with known size"
-        file_obj = io.BytesIO(content)
-
-        result = mock_storage._store_simple(file_obj)
-
-        assert result.size == len(content)
-
-    @pytest.mark.unit
-    def test_storage_generates_correct_s3_key(self, mock_storage):
-        """Test storage layer generates correct S3 key pattern."""
-        content = TEST_CONTENT_HELLO
-        file_obj = io.BytesIO(content)
-
-        result = mock_storage._store_simple(file_obj)
-
-        # Key should be: fruits/{hash[:2]}/{hash[2:4]}/{hash}
-        expected_key = (
-            f"fruits/{TEST_HASH_HELLO[:2]}/{TEST_HASH_HELLO[2:4]}/{TEST_HASH_HELLO}"
-        )
-        assert result.s3_key == expected_key
-
-
-class TestHashEdgeCases:
-    """Edge case tests for hash computation."""
-
-    @pytest.mark.unit
-    def test_hash_empty_content_rejected(self, mock_storage):
-        """Test that empty content is rejected."""
-        from app.storage import HashComputationError
-
-        file_obj = io.BytesIO(b"")
-
-        with pytest.raises(HashComputationError):
-            mock_storage._store_simple(file_obj)
-
-    @pytest.mark.unit
-    def test_hash_large_file_streaming(self, mock_storage):
-        """Test hash computation for large files uses streaming."""
-        # Create a 10MB file
-        size = 10 * 1024 * 1024
-        content = b"x" * size
-        file_obj = io.BytesIO(content)
-
-        result = mock_storage._store_simple(file_obj)
-
-        expected_hash = compute_sha256(content)
-        assert result.sha256 == expected_hash
-
-    @pytest.mark.unit
-    def test_hash_special_bytes(self):
-        """Test hash handles all byte values correctly."""
-        # All possible byte values
-        content = bytes(range(256))
-        hash_value = compute_sha256(content)
-
-        assert len(hash_value) == 64
-        assert hash_value == TEST_HASH_BINARY

backend/tests/test_integration_uploads.py

@@ -1,551 +0,0 @@
-"""
-Integration tests for duplicate uploads and storage verification.
-
-These tests require the full stack to be running (docker-compose.local.yml).
-
-Tests cover:
-- Duplicate upload scenarios across packages and projects
-- Storage verification (single S3 object, single artifact row)
-- Upload table tracking
-- Content integrity verification
-- Concurrent upload handling
-- Failure cleanup
-"""
-
-import pytest
-import io
-import threading
-import time
-from concurrent.futures import ThreadPoolExecutor, as_completed
-from tests.conftest import (
-    compute_sha256,
-    upload_test_file,
-    list_s3_objects_by_hash,
-    s3_object_exists,
-    delete_s3_object_by_hash,
-)
-
-
-class TestDuplicateUploadScenarios:
-    """Integration tests for duplicate upload behavior."""
-
-    @pytest.mark.integration
-    def test_same_file_twice_returns_same_artifact_id(
-        self, integration_client, test_package
-    ):
-        """Test uploading same file twice returns same artifact_id."""
-        project, package = test_package
-        content = b"content uploaded twice for same artifact test"
-        expected_hash = compute_sha256(content)
-
-        # First upload
-        result1 = upload_test_file(
-            integration_client, project, package, content, tag="first"
-        )
-        assert result1["artifact_id"] == expected_hash
-
-        # Second upload
-        result2 = upload_test_file(
-            integration_client, project, package, content, tag="second"
-        )
-        assert result2["artifact_id"] == expected_hash
-        assert result1["artifact_id"] == result2["artifact_id"]
-
-    @pytest.mark.integration
-    def test_same_file_twice_increments_ref_count(
-        self, integration_client, test_package
-    ):
-        """Test uploading same file twice increments ref_count to 2."""
-        project, package = test_package
-        content = b"content for ref count increment test"
-
-        # First upload
-        result1 = upload_test_file(
-            integration_client, project, package, content, tag="v1"
-        )
-        assert result1["ref_count"] == 1
-
-        # Second upload
-        result2 = upload_test_file(
-            integration_client, project, package, content, tag="v2"
-        )
-        assert result2["ref_count"] == 2
-
-    @pytest.mark.integration
-    def test_same_file_different_packages_shares_artifact(
-        self, integration_client, test_project, unique_test_id
-    ):
-        """Test uploading same file to different packages shares artifact."""
-        project = test_project
-        content = f"content shared across packages {unique_test_id}".encode()
-        expected_hash = compute_sha256(content)
-
-        # Create two packages
-        pkg1 = f"package-a-{unique_test_id}"
-        pkg2 = f"package-b-{unique_test_id}"
-
-        integration_client.post(
-            f"/api/v1/project/{project}/packages",
-            json={"name": pkg1, "description": "Package A"},
-        )
-        integration_client.post(
-            f"/api/v1/project/{project}/packages",
-            json={"name": pkg2, "description": "Package B"},
-        )
-
-        # Upload to first package
-        result1 = upload_test_file(integration_client, project, pkg1, content, tag="v1")
-        assert result1["artifact_id"] == expected_hash
-        assert result1["deduplicated"] is False
-
-        # Upload to second package
-        result2 = upload_test_file(integration_client, project, pkg2, content, tag="v1")
-        assert result2["artifact_id"] == expected_hash
-        assert result2["deduplicated"] is True
-
-    @pytest.mark.integration
-    def test_same_file_different_projects_shares_artifact(
-        self, integration_client, unique_test_id
-    ):
-        """Test uploading same file to different projects shares artifact."""
-        content = f"content shared across projects {unique_test_id}".encode()
-        expected_hash = compute_sha256(content)
-
-        # Create two projects with packages
-        proj1 = f"project-x-{unique_test_id}"
-        proj2 = f"project-y-{unique_test_id}"
-        pkg_name = "shared-pkg"
-
-        try:
-            # Create projects and packages
-            integration_client.post(
-                "/api/v1/projects",
-                json={"name": proj1, "description": "Project X", "is_public": True},
-            )
-            integration_client.post(
-                "/api/v1/projects",
-                json={"name": proj2, "description": "Project Y", "is_public": True},
-            )
-            integration_client.post(
-                f"/api/v1/project/{proj1}/packages",
-                json={"name": pkg_name, "description": "Package"},
-            )
-            integration_client.post(
-                f"/api/v1/project/{proj2}/packages",
-                json={"name": pkg_name, "description": "Package"},
-            )
-
-            # Upload to first project
-            result1 = upload_test_file(
-                integration_client, proj1, pkg_name, content, tag="v1"
-            )
-            assert result1["artifact_id"] == expected_hash
-            assert result1["deduplicated"] is False
-
-            # Upload to second project
-            result2 = upload_test_file(
-                integration_client, proj2, pkg_name, content, tag="v1"
-            )
-            assert result2["artifact_id"] == expected_hash
-            assert result2["deduplicated"] is True
-
-        finally:
-            # Cleanup
-            integration_client.delete(f"/api/v1/projects/{proj1}")
-            integration_client.delete(f"/api/v1/projects/{proj2}")
-
-    @pytest.mark.integration
-    def test_same_file_different_filenames_shares_artifact(
-        self, integration_client, test_package
-    ):
-        """Test uploading same file with different original filenames shares artifact."""
-        project, package = test_package
-        content = b"content with different filenames"
-        expected_hash = compute_sha256(content)
-
-        # Upload with filename1
-        result1 = upload_test_file(
-            integration_client,
-            project,
-            package,
-            content,
-            filename="file1.bin",
-            tag="v1",
-        )
-        assert result1["artifact_id"] == expected_hash
-
-        # Upload with filename2
-        result2 = upload_test_file(
-            integration_client,
-            project,
-            package,
-            content,
-            filename="file2.bin",
-            tag="v2",
-        )
-        assert result2["artifact_id"] == expected_hash
-        assert result2["deduplicated"] is True
-
-    @pytest.mark.integration
-    def test_same_file_different_tags_shares_artifact(
-        self, integration_client, test_package, unique_test_id
-    ):
-        """Test uploading same file with different tags shares artifact."""
-        project, package = test_package
-        content = f"content with different tags {unique_test_id}".encode()
-        expected_hash = compute_sha256(content)
-
-        tags = ["latest", "stable", "v1.0.0", "release"]
-        for i, tag in enumerate(tags):
-            result = upload_test_file(
-                integration_client, project, package, content, tag=tag
-            )
-            assert result["artifact_id"] == expected_hash
-            if i == 0:
-                assert result["deduplicated"] is False
-            else:
-                assert result["deduplicated"] is True
-
-
-class TestStorageVerification:
-    """Tests to verify storage behavior after duplicate uploads."""
-
-    @pytest.mark.integration
-    def test_artifact_table_single_row_after_duplicates(
-        self, integration_client, test_package
-    ):
-        """Test artifact table contains only one row after duplicate uploads."""
-        project, package = test_package
-        content = b"content for single row test"
-        expected_hash = compute_sha256(content)
-
-        # Upload same content multiple times with different tags
-        for tag in ["v1", "v2", "v3"]:
-            upload_test_file(integration_client, project, package, content, tag=tag)
-
-        # Query artifact - should exist and be unique
-        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
-        assert response.status_code == 200
-        artifact = response.json()
-        assert artifact["id"] == expected_hash
-        assert artifact["ref_count"] == 3
-
-    @pytest.mark.integration
-    def test_upload_table_multiple_rows_for_duplicates(
-        self, integration_client, test_package
-    ):
-        """Test upload table contains multiple rows for duplicate uploads (event tracking)."""
-        project, package = test_package
-        content = b"content for upload tracking test"
-
-        # Upload same content 3 times
-        for tag in ["upload1", "upload2", "upload3"]:
-            upload_test_file(integration_client, project, package, content, tag=tag)
-
-        # Check package stats - should show 3 uploads but fewer unique artifacts
-        response = integration_client.get(
-            f"/api/v1/project/{project}/packages/{package}"
-        )
-        assert response.status_code == 200
-        pkg_info = response.json()
-        assert pkg_info["tag_count"] == 3
-
-    @pytest.mark.integration
-    def test_artifact_content_matches_original(self, integration_client, test_package):
-        """Test artifact content retrieved matches original content exactly."""
-        project, package = test_package
-        original_content = b"exact content verification test data 12345"
-
-        # Upload
-        result = upload_test_file(
-            integration_client, project, package, original_content, tag="verify"
-        )
-
-        # Download and compare
-        download_response = integration_client.get(
-            f"/api/v1/project/{project}/{package}/+/verify", params={"mode": "proxy"}
-        )
-        assert download_response.status_code == 200
-        downloaded_content = download_response.content
-        assert downloaded_content == original_content
-
-    @pytest.mark.integration
-    def test_storage_stats_reflect_deduplication(
-        self, integration_client, test_package
-    ):
-        """Test total storage size matches single artifact size after duplicates."""
-        project, package = test_package
-        content = b"content for storage stats test - should only count once"
-        content_size = len(content)
-
-        # Upload same content 5 times
-        for tag in ["a", "b", "c", "d", "e"]:
-            upload_test_file(integration_client, project, package, content, tag=tag)
-
-        # Check global stats
-        response = integration_client.get("/api/v1/stats")
-        assert response.status_code == 200
-        stats = response.json()
-
-        # Deduplication should show savings
-        assert stats["deduplicated_uploads"] > 0
-        assert stats["storage_saved_bytes"] > 0
-
-
-class TestConcurrentUploads:
-    """Tests for concurrent upload handling."""
-
-    @pytest.mark.integration
-    def test_concurrent_uploads_same_file(self, integration_client, test_package):
-        """Test concurrent uploads of same file handle deduplication correctly."""
-        project, package = test_package
-        content = b"content for concurrent upload test"
-        expected_hash = compute_sha256(content)
-        num_concurrent = 5
-
-        results = []
-        errors = []
-
-        def upload_worker(tag_suffix):
-            try:
-                # Create a new client for this thread
-                from httpx import Client
-
-                base_url = "http://localhost:8080"
-                with Client(base_url=base_url, timeout=30.0) as client:
-                    files = {
-                        "file": (
-                            f"concurrent-{tag_suffix}.bin",
-                            io.BytesIO(content),
-                            "application/octet-stream",
-                        )
-                    }
-                    response = client.post(
-                        f"/api/v1/project/{project}/{package}/upload",
-                        files=files,
-                        data={"tag": f"concurrent-{tag_suffix}"},
-                    )
-                    if response.status_code == 200:
-                        results.append(response.json())
-                    else:
-                        errors.append(f"Status {response.status_code}: {response.text}")
-            except Exception as e:
-                errors.append(str(e))
-
-        # Run concurrent uploads
-        with ThreadPoolExecutor(max_workers=num_concurrent) as executor:
-            futures = [executor.submit(upload_worker, i) for i in range(num_concurrent)]
-            for future in as_completed(futures):
-                pass  # Wait for all to complete
-
-        # Verify results
-        assert len(errors) == 0, f"Errors during concurrent uploads: {errors}"
-        assert len(results) == num_concurrent
-
-        # All should have same artifact_id
-        artifact_ids = set(r["artifact_id"] for r in results)
-        assert len(artifact_ids) == 1
-        assert expected_hash in artifact_ids
-
-        # Verify final ref_count
-        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
-        assert response.status_code == 200
-        assert response.json()["ref_count"] == num_concurrent
-
-
-class TestDeduplicationAcrossRestarts:
-    """Tests for deduplication persistence."""
-
-    @pytest.mark.integration
-    def test_deduplication_persists(
-        self, integration_client, test_package, unique_test_id
-    ):
-        """
-        Test deduplication works with persisted data.
-
-        This test uploads content, then uploads the same content again.
-        Since the database persists, the second upload should detect
-        the existing artifact even without server restart.
-        """
-        project, package = test_package
-        content = f"persisted content for dedup test {unique_test_id}".encode()
-        expected_hash = compute_sha256(content)
-
-        # First upload
-        result1 = upload_test_file(
-            integration_client, project, package, content, tag="persist1"
-        )
-        assert result1["artifact_id"] == expected_hash
-        assert result1["deduplicated"] is False
-
-        # Second upload (simulating after restart - data is persisted)
-        result2 = upload_test_file(
-            integration_client, project, package, content, tag="persist2"
-        )
-        assert result2["artifact_id"] == expected_hash
-        assert result2["deduplicated"] is True
-
-        # Verify artifact exists with correct ref_count
-        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
-        assert response.status_code == 200
-        assert response.json()["ref_count"] == 2
-
-
-class TestS3ObjectVerification:
-    """Tests to verify S3 storage behavior directly."""
-
-    @pytest.mark.integration
-    def test_s3_bucket_single_object_after_duplicates(
-        self, integration_client, test_package, unique_test_id
-    ):
-        """Test S3 bucket contains only one object after duplicate uploads."""
-        project, package = test_package
-        content = f"content for s3 object count test {unique_test_id}".encode()
-        expected_hash = compute_sha256(content)
-
-        # Upload same content multiple times with different tags
-        for tag in ["s3test1", "s3test2", "s3test3"]:
-            upload_test_file(integration_client, project, package, content, tag=tag)
-
-        # Verify only one S3 object exists for this hash
-        s3_objects = list_s3_objects_by_hash(expected_hash)
-        assert len(s3_objects) == 1, (
-            f"Expected 1 S3 object, found {len(s3_objects)}: {s3_objects}"
-        )
-
-        # Verify the object key follows expected pattern
-        expected_key = (
-            f"fruits/{expected_hash[:2]}/{expected_hash[2:4]}/{expected_hash}"
-        )
-        assert s3_objects[0] == expected_key
-
-
-class TestUploadFailureCleanup:
-    """Tests for cleanup when uploads fail."""
-
-    @pytest.mark.integration
-    def test_upload_failure_invalid_project_no_orphaned_s3(
-        self, integration_client, unique_test_id
-    ):
-        """Test upload to non-existent project doesn't leave orphaned S3 objects."""
-        content = f"content for orphan s3 test {unique_test_id}".encode()
-        expected_hash = compute_sha256(content)
-
-        # Attempt upload to non-existent project
-        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
-        response = integration_client.post(
-            f"/api/v1/project/nonexistent-project-{unique_test_id}/nonexistent-pkg/upload",
-            files=files,
-            data={"tag": "test"},
-        )
-
-        # Upload should fail
-        assert response.status_code == 404
-
-        # Verify no S3 object was created
-        assert not s3_object_exists(expected_hash), (
-            "Orphaned S3 object found after failed upload"
-        )
-
-    @pytest.mark.integration
-    def test_upload_failure_invalid_package_no_orphaned_s3(
-        self, integration_client, test_project, unique_test_id
-    ):
-        """Test upload to non-existent package doesn't leave orphaned S3 objects."""
-        content = f"content for orphan s3 test pkg {unique_test_id}".encode()
-        expected_hash = compute_sha256(content)
-
-        # Attempt upload to non-existent package
-        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
-        response = integration_client.post(
-            f"/api/v1/project/{test_project}/nonexistent-package-{unique_test_id}/upload",
-            files=files,
-            data={"tag": "test"},
-        )
-
-        # Upload should fail
-        assert response.status_code == 404
-
-        # Verify no S3 object was created
-        assert not s3_object_exists(expected_hash), (
-            "Orphaned S3 object found after failed upload"
-        )
-
-    @pytest.mark.integration
-    def test_upload_failure_empty_file_no_orphaned_s3(
-        self, integration_client, test_package, unique_test_id
-    ):
-        """Test upload of empty file doesn't leave orphaned S3 objects or DB records."""
-        project, package = test_package
-        content = b""  # Empty content
-
-        # Attempt upload of empty file
-        files = {"file": ("empty.bin", io.BytesIO(content), "application/octet-stream")}
-        response = integration_client.post(
-            f"/api/v1/project/{project}/{package}/upload",
-            files=files,
-            data={"tag": f"empty-{unique_test_id}"},
-        )
-
-        # Upload should fail (empty files are rejected)
-        assert response.status_code in (400, 422), (
-            f"Expected 400/422, got {response.status_code}"
-        )
-
-    @pytest.mark.integration
-    def test_upload_failure_no_orphaned_database_records(
-        self, integration_client, test_project, unique_test_id
-    ):
-        """Test failed upload doesn't leave orphaned database records."""
-        content = f"content for db orphan test {unique_test_id}".encode()
-        expected_hash = compute_sha256(content)
-
-        # Attempt upload to non-existent package (should fail before DB insert)
-        files = {"file": ("test.bin", io.BytesIO(content), "application/octet-stream")}
-        response = integration_client.post(
-            f"/api/v1/project/{test_project}/nonexistent-package-{unique_test_id}/upload",
-            files=files,
-            data={"tag": "test"},
-        )
-
-        # Upload should fail
-        assert response.status_code == 404
-
-        # Verify no artifact record was created
-        artifact_response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
-        assert artifact_response.status_code == 404, (
-            "Orphaned artifact record found after failed upload"
-        )
-
-    @pytest.mark.integration
-    def test_duplicate_tag_upload_handles_gracefully(
-        self, integration_client, test_package, unique_test_id
-    ):
-        """Test uploading with duplicate tag is handled without orphaned data."""
-        project, package = test_package
-        content1 = f"content version 1 {unique_test_id}".encode()
-        content2 = f"content version 2 {unique_test_id}".encode()
-        tag = f"duplicate-tag-{unique_test_id}"
-
-        # First upload with tag
-        result1 = upload_test_file(
-            integration_client, project, package, content1, tag=tag
-        )
-        hash1 = result1["artifact_id"]
-
-        # Second upload with same tag (should update the tag to point to new artifact)
-        result2 = upload_test_file(
-            integration_client, project, package, content2, tag=tag
-        )
-        hash2 = result2["artifact_id"]
-
-        # Both artifacts should exist
-        assert integration_client.get(f"/api/v1/artifact/{hash1}").status_code == 200
-        assert integration_client.get(f"/api/v1/artifact/{hash2}").status_code == 200
-
-        # Tag should point to the second artifact
-        tag_response = integration_client.get(
-            f"/api/v1/project/{project}/{package}/tags/{tag}"
-        )
-        assert tag_response.status_code == 200
-        assert tag_response.json()["artifact_id"] == hash2

backend/tests/test_ref_count.py

@@ -1,176 +0,0 @@
-"""
-Unit and integration tests for reference counting behavior.
-
-Tests cover:
-- ref_count is set correctly for new artifacts
-- ref_count increments on duplicate uploads
-- ref_count query correctly identifies existing artifacts
-- Artifact lookup by SHA256 hash works correctly
-"""
-
-import pytest
-import io
-from tests.conftest import (
-    compute_sha256,
-    upload_test_file,
-    TEST_CONTENT_HELLO,
-    TEST_HASH_HELLO,
-)
-
-
-class TestRefCountQuery:
-    """Tests for ref_count querying and artifact lookup."""
-
-    @pytest.mark.integration
-    def test_artifact_lookup_by_sha256(self, integration_client, test_package):
-        """Test artifact lookup by SHA256 hash (primary key) works correctly."""
-        project, package = test_package
-        content = b"unique content for lookup test"
-        expected_hash = compute_sha256(content)
-
-        # Upload a file
-        upload_result = upload_test_file(
-            integration_client, project, package, content, tag="v1"
-        )
-        assert upload_result["artifact_id"] == expected_hash
-
-        # Look up artifact by ID (SHA256)
-        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
-        assert response.status_code == 200
-
-        artifact = response.json()
-        assert artifact["id"] == expected_hash
-        assert artifact["sha256"] == expected_hash
-        assert artifact["size"] == len(content)
-
-    @pytest.mark.integration
-    def test_ref_count_query_identifies_existing_artifact(
-        self, integration_client, test_package
-    ):
-        """Test ref_count query correctly identifies existing artifacts by hash."""
-        project, package = test_package
-        content = b"content for ref count query test"
-        expected_hash = compute_sha256(content)
-
-        # Upload a file with a tag
-        upload_result = upload_test_file(
-            integration_client, project, package, content, tag="v1"
-        )
-
-        # Query artifact and check ref_count
-        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
-        assert response.status_code == 200
-
-        artifact = response.json()
-        assert artifact["ref_count"] >= 1  # At least 1 from the tag
-
-    @pytest.mark.integration
-    def test_ref_count_set_to_1_for_new_artifact_with_tag(
-        self, integration_client, test_package, unique_test_id
-    ):
-        """Test ref_count is set to 1 for new artifacts when created with a tag."""
-        project, package = test_package
-        content = f"brand new content for ref count test {unique_test_id}".encode()
-        expected_hash = compute_sha256(content)
-
-        # Upload a new file with a tag
-        upload_result = upload_test_file(
-            integration_client, project, package, content, tag="initial"
-        )
-
-        assert upload_result["artifact_id"] == expected_hash
-        assert upload_result["ref_count"] == 1
-        assert upload_result["deduplicated"] is False
-
-    @pytest.mark.integration
-    def test_ref_count_increments_on_duplicate_upload_with_tag(
-        self, integration_client, test_package, unique_test_id
-    ):
-        """Test ref_count is incremented when duplicate content is uploaded with a new tag."""
-        project, package = test_package
-        content = f"content that will be uploaded twice {unique_test_id}".encode()
-        expected_hash = compute_sha256(content)
-
-        # First upload with tag
-        result1 = upload_test_file(
-            integration_client, project, package, content, tag="v1"
-        )
-        assert result1["ref_count"] == 1
-        assert result1["deduplicated"] is False
-
-        # Second upload with different tag (same content)
-        result2 = upload_test_file(
-            integration_client, project, package, content, tag="v2"
-        )
-        assert result2["artifact_id"] == expected_hash
-        assert result2["ref_count"] == 2
-        assert result2["deduplicated"] is True
-
-    @pytest.mark.integration
-    def test_ref_count_after_multiple_tags(self, integration_client, test_package):
-        """Test ref_count correctly reflects number of tags pointing to artifact."""
-        project, package = test_package
-        content = b"content for multiple tag test"
-        expected_hash = compute_sha256(content)
-
-        # Upload with multiple tags
-        tags = ["v1", "v2", "v3", "latest"]
-        for i, tag in enumerate(tags):
-            result = upload_test_file(
-                integration_client, project, package, content, tag=tag
-            )
-            assert result["artifact_id"] == expected_hash
-            assert result["ref_count"] == i + 1
-
-        # Verify final ref_count via artifact endpoint
-        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
-        assert response.status_code == 200
-        assert response.json()["ref_count"] == len(tags)
-
-
-class TestRefCountWithDeletion:
-    """Tests for ref_count behavior when tags are deleted."""
-
-    @pytest.mark.integration
-    def test_ref_count_decrements_on_tag_delete(self, integration_client, test_package):
-        """Test ref_count decrements when a tag is deleted."""
-        project, package = test_package
-        content = b"content for delete test"
-        expected_hash = compute_sha256(content)
-
-        # Upload with two tags
-        upload_test_file(integration_client, project, package, content, tag="v1")
-        upload_test_file(integration_client, project, package, content, tag="v2")
-
-        # Verify ref_count is 2
-        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
-        assert response.json()["ref_count"] == 2
-
-        # Delete one tag
-        delete_response = integration_client.delete(
-            f"/api/v1/project/{project}/{package}/tags/v1"
-        )
-        assert delete_response.status_code == 204
-
-        # Verify ref_count is now 1
-        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
-        assert response.json()["ref_count"] == 1
-
-    @pytest.mark.integration
-    def test_ref_count_zero_after_all_tags_deleted(
-        self, integration_client, test_package
-    ):
-        """Test ref_count goes to 0 when all tags are deleted."""
-        project, package = test_package
-        content = b"content that will be orphaned"
-        expected_hash = compute_sha256(content)
-
-        # Upload with one tag
-        upload_test_file(integration_client, project, package, content, tag="only-tag")
-
-        # Delete the tag
-        integration_client.delete(f"/api/v1/project/{project}/{package}/tags/only-tag")
-
-        # Verify ref_count is 0
-        response = integration_client.get(f"/api/v1/artifact/{expected_hash}")
-        assert response.json()["ref_count"] == 0

backend/tests/test_stats_endpoints.py

@@ -1,488 +0,0 @@
-"""
-Integration tests for statistics endpoints.
-
-Tests cover:
-- Global stats endpoint
-- Deduplication stats endpoint
-- Cross-project deduplication
-- Timeline stats
-- Export and report endpoints
-- Package and artifact stats
-"""
-
-import pytest
-from tests.conftest import compute_sha256, upload_test_file
-
-
-class TestGlobalStats:
-    """Tests for GET /api/v1/stats endpoint."""
-
-    @pytest.mark.integration
-    def test_stats_returns_valid_response(self, integration_client):
-        """Test stats endpoint returns expected fields."""
-        response = integration_client.get("/api/v1/stats")
-        assert response.status_code == 200
-
-        data = response.json()
-        # Check all required fields exist
-        assert "total_artifacts" in data
-        assert "total_size_bytes" in data
-        assert "unique_artifacts" in data
-        assert "orphaned_artifacts" in data
-        assert "orphaned_size_bytes" in data
-        assert "total_uploads" in data
-        assert "deduplicated_uploads" in data
-        assert "deduplication_ratio" in data
-        assert "storage_saved_bytes" in data
-
-    @pytest.mark.integration
-    def test_stats_values_are_non_negative(self, integration_client):
-        """Test all stat values are non-negative."""
-        response = integration_client.get("/api/v1/stats")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert data["total_artifacts"] >= 0
-        assert data["total_size_bytes"] >= 0
-        assert data["unique_artifacts"] >= 0
-        assert data["orphaned_artifacts"] >= 0
-        assert data["total_uploads"] >= 0
-        assert data["deduplicated_uploads"] >= 0
-        assert data["deduplication_ratio"] >= 0
-        assert data["storage_saved_bytes"] >= 0
-
-    @pytest.mark.integration
-    def test_stats_update_after_upload(
-        self, integration_client, test_package, unique_test_id
-    ):
-        """Test stats update after uploading an artifact."""
-        project, package = test_package
-
-        # Get initial stats
-        initial_response = integration_client.get("/api/v1/stats")
-        initial_stats = initial_response.json()
-
-        # Upload a new file
-        content = f"stats test content {unique_test_id}".encode()
-        upload_test_file(
-            integration_client, project, package, content, tag=f"stats-{unique_test_id}"
-        )
-
-        # Get updated stats
-        updated_response = integration_client.get("/api/v1/stats")
-        updated_stats = updated_response.json()
-
-        # Verify stats increased
-        assert updated_stats["total_uploads"] >= initial_stats["total_uploads"]
-
-
-class TestDeduplicationStats:
-    """Tests for GET /api/v1/stats/deduplication endpoint."""
-
-    @pytest.mark.integration
-    def test_dedup_stats_returns_valid_response(self, integration_client):
-        """Test deduplication stats returns expected fields."""
-        response = integration_client.get("/api/v1/stats/deduplication")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert "total_logical_bytes" in data
-        assert "total_physical_bytes" in data
-        assert "bytes_saved" in data
-        assert "savings_percentage" in data
-        assert "total_uploads" in data
-        assert "unique_artifacts" in data
-        assert "duplicate_uploads" in data
-        assert "average_ref_count" in data
-        assert "max_ref_count" in data
-        assert "most_referenced_artifacts" in data
-
-    @pytest.mark.integration
-    def test_most_referenced_artifacts_format(self, integration_client):
-        """Test most_referenced_artifacts has correct structure."""
-        response = integration_client.get("/api/v1/stats/deduplication")
-        assert response.status_code == 200
-
-        data = response.json()
-        artifacts = data["most_referenced_artifacts"]
-        assert isinstance(artifacts, list)
-
-        if len(artifacts) > 0:
-            artifact = artifacts[0]
-            assert "artifact_id" in artifact
-            assert "ref_count" in artifact
-            assert "size" in artifact
-            assert "storage_saved" in artifact
-
-    @pytest.mark.integration
-    def test_dedup_stats_with_top_n_param(self, integration_client):
-        """Test deduplication stats respects top_n parameter."""
-        response = integration_client.get("/api/v1/stats/deduplication?top_n=3")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert len(data["most_referenced_artifacts"]) <= 3
-
-    @pytest.mark.integration
-    def test_savings_percentage_valid_range(self, integration_client):
-        """Test savings percentage is between 0 and 100."""
-        response = integration_client.get("/api/v1/stats/deduplication")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert 0 <= data["savings_percentage"] <= 100
-
-
-class TestCrossProjectStats:
-    """Tests for GET /api/v1/stats/cross-project endpoint."""
-
-    @pytest.mark.integration
-    def test_cross_project_returns_valid_response(self, integration_client):
-        """Test cross-project stats returns expected fields."""
-        response = integration_client.get("/api/v1/stats/cross-project")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert "shared_artifacts_count" in data
-        assert "total_cross_project_savings" in data
-        assert "shared_artifacts" in data
-        assert isinstance(data["shared_artifacts"], list)
-
-    @pytest.mark.integration
-    def test_cross_project_respects_limit(self, integration_client):
-        """Test cross-project stats respects limit parameter."""
-        response = integration_client.get("/api/v1/stats/cross-project?limit=5")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert len(data["shared_artifacts"]) <= 5
-
-    @pytest.mark.integration
-    def test_cross_project_detects_shared_artifacts(
-        self, integration_client, unique_test_id
-    ):
-        """Test cross-project deduplication is detected."""
-        content = f"shared across projects {unique_test_id}".encode()
-
-        # Create two projects
-        proj1 = f"cross-proj-a-{unique_test_id}"
-        proj2 = f"cross-proj-b-{unique_test_id}"
-
-        try:
-            # Create projects and packages
-            integration_client.post(
-                "/api/v1/projects",
-                json={"name": proj1, "description": "Test", "is_public": True},
-            )
-            integration_client.post(
-                "/api/v1/projects",
-                json={"name": proj2, "description": "Test", "is_public": True},
-            )
-            integration_client.post(
-                f"/api/v1/project/{proj1}/packages",
-                json={"name": "pkg", "description": "Test"},
-            )
-            integration_client.post(
-                f"/api/v1/project/{proj2}/packages",
-                json={"name": "pkg", "description": "Test"},
-            )
-
-            # Upload same content to both projects
-            upload_test_file(integration_client, proj1, "pkg", content, tag="v1")
-            upload_test_file(integration_client, proj2, "pkg", content, tag="v1")
-
-            # Check cross-project stats
-            response = integration_client.get("/api/v1/stats/cross-project")
-            assert response.status_code == 200
-
-            data = response.json()
-            assert data["shared_artifacts_count"] >= 1
-
-        finally:
-            # Cleanup
-            integration_client.delete(f"/api/v1/projects/{proj1}")
-            integration_client.delete(f"/api/v1/projects/{proj2}")
-
-
-class TestTimelineStats:
-    """Tests for GET /api/v1/stats/timeline endpoint."""
-
-    @pytest.mark.integration
-    def test_timeline_returns_valid_response(self, integration_client):
-        """Test timeline stats returns expected fields."""
-        response = integration_client.get("/api/v1/stats/timeline")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert "period" in data
-        assert "start_date" in data
-        assert "end_date" in data
-        assert "data_points" in data
-        assert isinstance(data["data_points"], list)
-
-    @pytest.mark.integration
-    def test_timeline_daily_period(self, integration_client):
-        """Test timeline with daily period."""
-        response = integration_client.get("/api/v1/stats/timeline?period=daily")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert data["period"] == "daily"
-
-    @pytest.mark.integration
-    def test_timeline_weekly_period(self, integration_client):
-        """Test timeline with weekly period."""
-        response = integration_client.get("/api/v1/stats/timeline?period=weekly")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert data["period"] == "weekly"
-
-    @pytest.mark.integration
-    def test_timeline_monthly_period(self, integration_client):
-        """Test timeline with monthly period."""
-        response = integration_client.get("/api/v1/stats/timeline?period=monthly")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert data["period"] == "monthly"
-
-    @pytest.mark.integration
-    def test_timeline_invalid_period_rejected(self, integration_client):
-        """Test timeline rejects invalid period."""
-        response = integration_client.get("/api/v1/stats/timeline?period=invalid")
-        assert response.status_code == 422
-
-    @pytest.mark.integration
-    def test_timeline_data_point_structure(self, integration_client):
-        """Test timeline data points have correct structure."""
-        response = integration_client.get("/api/v1/stats/timeline")
-        assert response.status_code == 200
-
-        data = response.json()
-        if len(data["data_points"]) > 0:
-            point = data["data_points"][0]
-            assert "date" in point
-            assert "total_uploads" in point
-            assert "unique_artifacts" in point
-            assert "duplicated_uploads" in point
-            assert "bytes_saved" in point
-
-
-class TestExportEndpoint:
-    """Tests for GET /api/v1/stats/export endpoint."""
-
-    @pytest.mark.integration
-    def test_export_json_format(self, integration_client):
-        """Test export with JSON format."""
-        response = integration_client.get("/api/v1/stats/export?format=json")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert "total_artifacts" in data
-        assert "generated_at" in data
-
-    @pytest.mark.integration
-    def test_export_csv_format(self, integration_client):
-        """Test export with CSV format."""
-        response = integration_client.get("/api/v1/stats/export?format=csv")
-        assert response.status_code == 200
-        assert "text/csv" in response.headers.get("content-type", "")
-
-        content = response.text
-        assert "Metric,Value" in content
-        assert "total_artifacts" in content
-
-    @pytest.mark.integration
-    def test_export_invalid_format_rejected(self, integration_client):
-        """Test export rejects invalid format."""
-        response = integration_client.get("/api/v1/stats/export?format=xml")
-        assert response.status_code == 422
-
-
-class TestReportEndpoint:
-    """Tests for GET /api/v1/stats/report endpoint."""
-
-    @pytest.mark.integration
-    def test_report_markdown_format(self, integration_client):
-        """Test report with markdown format."""
-        response = integration_client.get("/api/v1/stats/report?format=markdown")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert data["format"] == "markdown"
-        assert "generated_at" in data
-        assert "content" in data
-        assert "# Orchard Storage Report" in data["content"]
-
-    @pytest.mark.integration
-    def test_report_json_format(self, integration_client):
-        """Test report with JSON format."""
-        response = integration_client.get("/api/v1/stats/report?format=json")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert data["format"] == "json"
-        assert "content" in data
-
-    @pytest.mark.integration
-    def test_report_contains_sections(self, integration_client):
-        """Test markdown report contains expected sections."""
-        response = integration_client.get("/api/v1/stats/report?format=markdown")
-        assert response.status_code == 200
-
-        content = response.json()["content"]
-        assert "## Overview" in content
-        assert "## Storage" in content
-        assert "## Uploads" in content
-
-
-class TestProjectStats:
-    """Tests for GET /api/v1/projects/:project/stats endpoint."""
-
-    @pytest.mark.integration
-    def test_project_stats_returns_valid_response(
-        self, integration_client, test_project
-    ):
-        """Test project stats returns expected fields."""
-        response = integration_client.get(f"/api/v1/projects/{test_project}/stats")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert "project_id" in data
-        assert "project_name" in data
-        assert "package_count" in data
-        assert "tag_count" in data
-        assert "artifact_count" in data
-        assert "total_size_bytes" in data
-        assert "upload_count" in data
-        assert "deduplicated_uploads" in data
-        assert "storage_saved_bytes" in data
-        assert "deduplication_ratio" in data
-
-    @pytest.mark.integration
-    def test_project_stats_not_found(self, integration_client):
-        """Test project stats returns 404 for non-existent project."""
-        response = integration_client.get("/api/v1/projects/nonexistent-project/stats")
-        assert response.status_code == 404
-
-
-class TestPackageStats:
-    """Tests for GET /api/v1/project/:project/packages/:package/stats endpoint."""
-
-    @pytest.mark.integration
-    def test_package_stats_returns_valid_response(
-        self, integration_client, test_package
-    ):
-        """Test package stats returns expected fields."""
-        project, package = test_package
-        response = integration_client.get(
-            f"/api/v1/project/{project}/packages/{package}/stats"
-        )
-        assert response.status_code == 200
-
-        data = response.json()
-        assert "package_id" in data
-        assert "package_name" in data
-        assert "project_name" in data
-        assert "tag_count" in data
-        assert "artifact_count" in data
-        assert "total_size_bytes" in data
-        assert "upload_count" in data
-        assert "deduplicated_uploads" in data
-        assert "storage_saved_bytes" in data
-        assert "deduplication_ratio" in data
-
-    @pytest.mark.integration
-    def test_package_stats_not_found(self, integration_client, test_project):
-        """Test package stats returns 404 for non-existent package."""
-        response = integration_client.get(
-            f"/api/v1/project/{test_project}/packages/nonexistent-package/stats"
-        )
-        assert response.status_code == 404
-
-
-class TestArtifactStats:
-    """Tests for GET /api/v1/artifact/:id/stats endpoint."""
-
-    @pytest.mark.integration
-    def test_artifact_stats_returns_valid_response(
-        self, integration_client, test_package, unique_test_id
-    ):
-        """Test artifact stats returns expected fields."""
-        project, package = test_package
-        content = f"artifact stats test {unique_test_id}".encode()
-        expected_hash = compute_sha256(content)
-
-        # Upload artifact
-        upload_test_file(
-            integration_client, project, package, content, tag=f"art-{unique_test_id}"
-        )
-
-        # Get artifact stats
-        response = integration_client.get(f"/api/v1/artifact/{expected_hash}/stats")
-        assert response.status_code == 200
-
-        data = response.json()
-        assert "artifact_id" in data
-        assert "sha256" in data
-        assert "size" in data
-        assert "ref_count" in data
-        assert "storage_savings" in data
-        assert "tags" in data
-        assert "projects" in data
-        assert "packages" in data
-
-    @pytest.mark.integration
-    def test_artifact_stats_not_found(self, integration_client):
-        """Test artifact stats returns 404 for non-existent artifact."""
-        fake_hash = "0" * 64
-        response = integration_client.get(f"/api/v1/artifact/{fake_hash}/stats")
-        assert response.status_code == 404
-
-    @pytest.mark.integration
-    def test_artifact_stats_shows_correct_projects(
-        self, integration_client, unique_test_id
-    ):
-        """Test artifact stats shows all projects using the artifact."""
-        content = f"multi-project artifact {unique_test_id}".encode()
-        expected_hash = compute_sha256(content)
-
-        proj1 = f"art-stats-a-{unique_test_id}"
-        proj2 = f"art-stats-b-{unique_test_id}"
-
-        try:
-            # Create projects and packages
-            integration_client.post(
-                "/api/v1/projects",
-                json={"name": proj1, "description": "Test", "is_public": True},
-            )
-            integration_client.post(
-                "/api/v1/projects",
-                json={"name": proj2, "description": "Test", "is_public": True},
-            )
-            integration_client.post(
-                f"/api/v1/project/{proj1}/packages",
-                json={"name": "pkg", "description": "Test"},
-            )
-            integration_client.post(
-                f"/api/v1/project/{proj2}/packages",
-                json={"name": "pkg", "description": "Test"},
-            )
-
-            # Upload same content to both projects
-            upload_test_file(integration_client, proj1, "pkg", content, tag="v1")
-            upload_test_file(integration_client, proj2, "pkg", content, tag="v1")
-
-            # Check artifact stats
-            response = integration_client.get(f"/api/v1/artifact/{expected_hash}/stats")
-            assert response.status_code == 200
-
-            data = response.json()
-            assert len(data["projects"]) == 2
-            assert proj1 in data["projects"]
-            assert proj2 in data["projects"]
-
-        finally:
-            integration_client.delete(f"/api/v1/projects/{proj1}")
-            integration_client.delete(f"/api/v1/projects/{proj2}")

backend/tests/unit/test_models.py

@@ -0,0 +1,271 @@
+"""
+Unit tests for SQLAlchemy models.
+
+Tests cover:
+- Model instantiation and defaults
+- Property aliases (sha256, format_metadata)
+- Relationship definitions
+- Constraint definitions
+"""
+
+import pytest
+import uuid
+from datetime import datetime
+
+
+class TestArtifactModel:
+    """Tests for the Artifact model."""
+
+    @pytest.mark.unit
+    def test_artifact_sha256_property(self):
+        """Test sha256 property is an alias for id."""
+        from app.models import Artifact
+
+        artifact = Artifact(
+            id="a" * 64,
+            size=1024,
+            created_by="test-user",
+            s3_key="fruits/aa/aa/test",
+        )
+
+        assert artifact.sha256 == artifact.id
+        assert artifact.sha256 == "a" * 64
+
+    @pytest.mark.unit
+    def test_artifact_format_metadata_alias(self):
+        """Test format_metadata is an alias for artifact_metadata."""
+        from app.models import Artifact
+
+        test_metadata = {"format": "tarball", "version": "1.0.0"}
+        artifact = Artifact(
+            id="b" * 64,
+            size=2048,
+            created_by="test-user",
+            s3_key="fruits/bb/bb/test",
+            artifact_metadata=test_metadata,
+        )
+
+        assert artifact.format_metadata == test_metadata
+        assert artifact.format_metadata == artifact.artifact_metadata
+
+    @pytest.mark.unit
+    def test_artifact_format_metadata_setter(self):
+        """Test format_metadata setter updates artifact_metadata."""
+        from app.models import Artifact
+
+        artifact = Artifact(
+            id="c" * 64,
+            size=512,
+            created_by="test-user",
+            s3_key="fruits/cc/cc/test",
+        )
+
+        new_metadata = {"type": "rpm", "arch": "x86_64"}
+        artifact.format_metadata = new_metadata
+
+        assert artifact.artifact_metadata == new_metadata
+        assert artifact.format_metadata == new_metadata
+
+    @pytest.mark.unit
+    def test_artifact_default_ref_count(self):
+        """Test artifact ref_count column has default value of 1."""
+        from app.models import Artifact
+
+        # Check the column definition has the right default
+        ref_count_col = Artifact.__table__.columns["ref_count"]
+        assert ref_count_col.default is not None
+        assert ref_count_col.default.arg == 1
+
+    @pytest.mark.unit
+    def test_artifact_default_metadata_is_dict(self):
+        """Test artifact default metadata is an empty dict."""
+        from app.models import Artifact
+
+        artifact = Artifact(
+            id="e" * 64,
+            size=100,
+            created_by="test-user",
+            s3_key="fruits/ee/ee/test",
+        )
+
+        # Default might be None until saved, but the column default is dict
+        assert artifact.artifact_metadata is None or isinstance(
+            artifact.artifact_metadata, dict
+        )
+
+
+class TestProjectModel:
+    """Tests for the Project model."""
+
+    @pytest.mark.unit
+    def test_project_default_is_public(self):
+        """Test project is_public column has default value of True."""
+        from app.models import Project
+
+        # Check the column definition has the right default
+        is_public_col = Project.__table__.columns["is_public"]
+        assert is_public_col.default is not None
+        assert is_public_col.default.arg is True
+
+    @pytest.mark.unit
+    def test_project_uuid_generation(self):
+        """Test project generates UUID by default."""
+        from app.models import Project
+
+        project = Project(
+            name="uuid-test-project",
+            created_by="test-user",
+        )
+
+        # UUID should be set by default function
+        assert project.id is not None or hasattr(Project.id, "default")
+
+
+class TestPackageModel:
+    """Tests for the Package model."""
+
+    @pytest.mark.unit
+    def test_package_default_format(self):
+        """Test package format column has default value of 'generic'."""
+        from app.models import Package
+
+        # Check the column definition has the right default
+        format_col = Package.__table__.columns["format"]
+        assert format_col.default is not None
+        assert format_col.default.arg == "generic"
+
+    @pytest.mark.unit
+    def test_package_default_platform(self):
+        """Test package platform column has default value of 'any'."""
+        from app.models import Package
+
+        # Check the column definition has the right default
+        platform_col = Package.__table__.columns["platform"]
+        assert platform_col.default is not None
+        assert platform_col.default.arg == "any"
+
+
+class TestTagModel:
+    """Tests for the Tag model."""
+
+    @pytest.mark.unit
+    def test_tag_requires_package_id(self):
+        """Test tag requires package_id."""
+        from app.models import Tag
+
+        tag = Tag(
+            name="v1.0.0",
+            package_id=uuid.uuid4(),
+            artifact_id="f" * 64,
+            created_by="test-user",
+        )
+
+        assert tag.package_id is not None
+        assert tag.artifact_id == "f" * 64
+
+
+class TestTagHistoryModel:
+    """Tests for the TagHistory model."""
+
+    @pytest.mark.unit
+    def test_tag_history_default_change_type(self):
+        """Test tag history change_type column has default value of 'update'."""
+        from app.models import TagHistory
+
+        # Check the column definition has the right default
+        change_type_col = TagHistory.__table__.columns["change_type"]
+        assert change_type_col.default is not None
+        assert change_type_col.default.arg == "update"
+
+    @pytest.mark.unit
+    def test_tag_history_allows_null_old_artifact(self):
+        """Test tag history allows null old_artifact_id (for create events)."""
+        from app.models import TagHistory
+
+        history = TagHistory(
+            tag_id=uuid.uuid4(),
+            old_artifact_id=None,
+            new_artifact_id="h" * 64,
+            change_type="create",
+            changed_by="test-user",
+        )
+
+        assert history.old_artifact_id is None
+
+
+class TestUploadModel:
+    """Tests for the Upload model."""
+
+    @pytest.mark.unit
+    def test_upload_default_deduplicated_is_false(self):
+        """Test upload deduplicated column has default value of False."""
+        from app.models import Upload
+
+        # Check the column definition has the right default
+        deduplicated_col = Upload.__table__.columns["deduplicated"]
+        assert deduplicated_col.default is not None
+        assert deduplicated_col.default.arg is False
+
+    @pytest.mark.unit
+    def test_upload_default_checksum_verified_is_true(self):
+        """Test upload checksum_verified column has default value of True."""
+        from app.models import Upload
+
+        # Check the column definition has the right default
+        checksum_verified_col = Upload.__table__.columns["checksum_verified"]
+        assert checksum_verified_col.default is not None
+        assert checksum_verified_col.default.arg is True
+
+
+class TestAccessPermissionModel:
+    """Tests for the AccessPermission model."""
+
+    @pytest.mark.unit
+    def test_access_permission_levels(self):
+        """Test valid access permission levels."""
+        from app.models import AccessPermission
+
+        # This tests the check constraint values
+        valid_levels = ["read", "write", "admin"]
+
+        for level in valid_levels:
+            permission = AccessPermission(
+                project_id=uuid.uuid4(),
+                user_id="test-user",
+                level=level,
+            )
+            assert permission.level == level
+
+
+class TestAuditLogModel:
+    """Tests for the AuditLog model."""
+
+    @pytest.mark.unit
+    def test_audit_log_required_fields(self):
+        """Test audit log has all required fields."""
+        from app.models import AuditLog
+
+        log = AuditLog(
+            action="project.create",
+            resource="/projects/test-project",
+            user_id="test-user",
+        )
+
+        assert log.action == "project.create"
+        assert log.resource == "/projects/test-project"
+        assert log.user_id == "test-user"
+
+    @pytest.mark.unit
+    def test_audit_log_optional_details(self):
+        """Test audit log can have optional details JSON."""
+        from app.models import AuditLog
+
+        details = {"old_value": "v1", "new_value": "v2"}
+        log = AuditLog(
+            action="tag.update",
+            resource="/projects/test/packages/pkg/tags/latest",
+            user_id="test-user",
+            details=details,
+        )
+
+        assert log.details == details

backend/tests/unit/test_storage.py

@@ -0,0 +1,439 @@
+"""
+Unit tests for S3 storage layer.
+
+Tests cover:
+- SHA256 hash calculation and consistency
+- Hash format validation (64-char hex)
+- S3 key generation pattern
+- Deduplication behavior (_exists method)
+- Storage result computation (MD5, SHA1, size)
+- Edge cases (empty files, large files, binary content)
+"""
+
+import pytest
+import hashlib
+import io
+from tests.factories import (
+    compute_sha256,
+    TEST_CONTENT_HELLO,
+    TEST_HASH_HELLO,
+    TEST_CONTENT_BINARY,
+    TEST_HASH_BINARY,
+)
+
+
+# =============================================================================
+# Hash Computation Tests
+# =============================================================================
+
+
+class TestHashComputation:
+    """Unit tests for hash calculation functionality."""
+
+    @pytest.mark.unit
+    def test_sha256_consistent_results(self):
+        """Test SHA256 hash produces consistent results for identical content."""
+        content = b"test content for hashing"
+
+        # Compute hash multiple times
+        hash1 = compute_sha256(content)
+        hash2 = compute_sha256(content)
+        hash3 = compute_sha256(content)
+
+        assert hash1 == hash2 == hash3
+
+    @pytest.mark.unit
+    def test_sha256_different_content_different_hash(self):
+        """Test SHA256 produces different hashes for different content."""
+        content1 = b"content version 1"
+        content2 = b"content version 2"
+
+        hash1 = compute_sha256(content1)
+        hash2 = compute_sha256(content2)
+
+        assert hash1 != hash2
+
+    @pytest.mark.unit
+    def test_sha256_format_64_char_hex(self):
+        """Test SHA256 hash is always 64 character lowercase hexadecimal."""
+        test_cases = [
+            b"",  # Empty
+            b"a",  # Single char
+            b"Hello, World!",  # Normal string
+            bytes(range(256)),  # All byte values
+            b"x" * 10000,  # Larger content
+        ]
+
+        for content in test_cases:
+            hash_value = compute_sha256(content)
+
+            # Check length
+            assert len(hash_value) == 64, (
+                f"Hash length should be 64, got {len(hash_value)}"
+            )
+
+            # Check lowercase
+            assert hash_value == hash_value.lower(), "Hash should be lowercase"
+
+            # Check hexadecimal
+            assert all(c in "0123456789abcdef" for c in hash_value), (
+                "Hash should be hex"
+            )
+
+    @pytest.mark.unit
+    def test_sha256_known_value(self):
+        """Test SHA256 produces expected hash for known input."""
+        assert compute_sha256(TEST_CONTENT_HELLO) == TEST_HASH_HELLO
+
+    @pytest.mark.unit
+    def test_sha256_binary_content(self):
+        """Test SHA256 handles binary content correctly."""
+        assert compute_sha256(TEST_CONTENT_BINARY) == TEST_HASH_BINARY
+
+        # Test with null bytes
+        content_with_nulls = b"\x00\x00test\x00\x00"
+        hash_value = compute_sha256(content_with_nulls)
+        assert len(hash_value) == 64
+
+    @pytest.mark.unit
+    def test_sha256_streaming_computation(self):
+        """Test SHA256 can be computed in chunks (streaming)."""
+        # Large content
+        chunk_size = 8192
+        total_size = chunk_size * 10  # 80KB
+        content = b"x" * total_size
+
+        # Direct computation
+        direct_hash = compute_sha256(content)
+
+        # Streaming computation
+        hasher = hashlib.sha256()
+        for i in range(0, total_size, chunk_size):
+            hasher.update(content[i : i + chunk_size])
+        streaming_hash = hasher.hexdigest()
+
+        assert direct_hash == streaming_hash
+
+    @pytest.mark.unit
+    def test_sha256_order_matters(self):
+        """Test that content order affects hash (not just content set)."""
+        content1 = b"AB"
+        content2 = b"BA"
+
+        assert compute_sha256(content1) != compute_sha256(content2)
+
+
+# =============================================================================
+# Storage Hash Computation Tests
+# =============================================================================
+
+
+class TestStorageHashComputation:
+    """Tests for hash computation in the storage layer."""
+
+    @pytest.mark.unit
+    def test_storage_computes_sha256(self, mock_storage):
+        """Test storage layer correctly computes SHA256 hash."""
+        content = TEST_CONTENT_HELLO
+        file_obj = io.BytesIO(content)
+
+        result = mock_storage._store_simple(file_obj)
+
+        assert result.sha256 == TEST_HASH_HELLO
+
+    @pytest.mark.unit
+    def test_storage_computes_md5(self, mock_storage):
+        """Test storage layer also computes MD5 hash."""
+        content = TEST_CONTENT_HELLO
+        file_obj = io.BytesIO(content)
+
+        result = mock_storage._store_simple(file_obj)
+
+        expected_md5 = hashlib.md5(content).hexdigest()
+        assert result.md5 == expected_md5
+
+    @pytest.mark.unit
+    def test_storage_computes_sha1(self, mock_storage):
+        """Test storage layer also computes SHA1 hash."""
+        content = TEST_CONTENT_HELLO
+        file_obj = io.BytesIO(content)
+
+        result = mock_storage._store_simple(file_obj)
+
+        expected_sha1 = hashlib.sha1(content).hexdigest()
+        assert result.sha1 == expected_sha1
+
+    @pytest.mark.unit
+    def test_storage_returns_correct_size(self, mock_storage):
+        """Test storage layer returns correct file size."""
+        content = b"test content with known size"
+        file_obj = io.BytesIO(content)
+
+        result = mock_storage._store_simple(file_obj)
+
+        assert result.size == len(content)
+
+    @pytest.mark.unit
+    def test_storage_generates_correct_s3_key(self, mock_storage):
+        """Test storage layer generates correct S3 key pattern."""
+        content = TEST_CONTENT_HELLO
+        file_obj = io.BytesIO(content)
+
+        result = mock_storage._store_simple(file_obj)
+
+        # Key should be: fruits/{hash[:2]}/{hash[2:4]}/{hash}
+        expected_key = (
+            f"fruits/{TEST_HASH_HELLO[:2]}/{TEST_HASH_HELLO[2:4]}/{TEST_HASH_HELLO}"
+        )
+        assert result.s3_key == expected_key
+
+
+# =============================================================================
+# Hash Edge Cases
+# =============================================================================
+
+
+class TestHashEdgeCases:
+    """Edge case tests for hash computation."""
+
+    @pytest.mark.unit
+    def test_hash_empty_content_rejected(self, mock_storage):
+        """Test that empty content is rejected."""
+        from app.storage import HashComputationError
+
+        file_obj = io.BytesIO(b"")
+
+        with pytest.raises(HashComputationError):
+            mock_storage._store_simple(file_obj)
+
+    @pytest.mark.unit
+    def test_hash_large_file_streaming(self, mock_storage):
+        """Test hash computation for large files uses streaming."""
+        # Create a 10MB file
+        size = 10 * 1024 * 1024
+        content = b"x" * size
+        file_obj = io.BytesIO(content)
+
+        result = mock_storage._store_simple(file_obj)
+
+        expected_hash = compute_sha256(content)
+        assert result.sha256 == expected_hash
+
+    @pytest.mark.unit
+    def test_hash_special_bytes(self):
+        """Test hash handles all byte values correctly."""
+        # All possible byte values
+        content = bytes(range(256))
+        hash_value = compute_sha256(content)
+
+        assert len(hash_value) == 64
+        assert hash_value == TEST_HASH_BINARY
+
+
+# =============================================================================
+# S3 Existence Check Tests
+# =============================================================================
+
+
+class TestExistsMethod:
+    """Tests for the _exists() method that checks S3 object existence."""
+
+    @pytest.mark.unit
+    def test_exists_returns_true_for_existing_key(self, mock_storage, mock_s3_client):
+        """Test _exists() returns True when object exists."""
+        # Pre-populate the mock storage
+        test_key = "fruits/df/fd/test-hash"
+        mock_s3_client.objects[test_key] = b"content"
+
+        result = mock_storage._exists(test_key)
+
+        assert result is True
+
+    @pytest.mark.unit
+    def test_exists_returns_false_for_nonexistent_key(self, mock_storage):
+        """Test _exists() returns False when object doesn't exist."""
+        result = mock_storage._exists("fruits/no/ne/nonexistent-key")
+
+        assert result is False
+
+    @pytest.mark.unit
+    def test_exists_handles_404_error(self, mock_storage):
+        """Test _exists() handles 404 errors gracefully."""
+        # The mock client raises ClientError for nonexistent keys
+        result = mock_storage._exists("fruits/xx/yy/does-not-exist")
+
+        assert result is False
+
+
+# =============================================================================
+# S3 Key Generation Tests
+# =============================================================================
+
+
+class TestS3KeyGeneration:
+    """Tests for S3 key pattern generation."""
+
+    @pytest.mark.unit
+    def test_s3_key_pattern(self):
+        """Test S3 key follows pattern: fruits/{hash[:2]}/{hash[2:4]}/{hash}"""
+        test_hash = "abcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890"
+
+        expected_key = f"fruits/{test_hash[:2]}/{test_hash[2:4]}/{test_hash}"
+        # Expected: fruits/ab/cd/abcdef1234567890...
+
+        assert expected_key == f"fruits/ab/cd/{test_hash}"
+
+    @pytest.mark.unit
+    def test_s3_key_generation_in_storage(self, mock_storage):
+        """Test storage layer generates correct S3 key."""
+        content = TEST_CONTENT_HELLO
+        file_obj = io.BytesIO(content)
+
+        result = mock_storage._store_simple(file_obj)
+
+        expected_key = (
+            f"fruits/{TEST_HASH_HELLO[:2]}/{TEST_HASH_HELLO[2:4]}/{TEST_HASH_HELLO}"
+        )
+        assert result.s3_key == expected_key
+
+    @pytest.mark.unit
+    def test_s3_key_uses_sha256_hash(self, mock_storage):
+        """Test S3 key is derived from SHA256 hash."""
+        content = b"unique test content for key test"
+        file_obj = io.BytesIO(content)
+        expected_hash = compute_sha256(content)
+
+        result = mock_storage._store_simple(file_obj)
+
+        # Key should contain the hash
+        assert expected_hash in result.s3_key
+
+
+# =============================================================================
+# Deduplication Behavior Tests
+# =============================================================================
+
+
+class TestDeduplicationBehavior:
+    """Tests for deduplication (skip upload when exists)."""
+
+    @pytest.mark.unit
+    def test_skips_upload_when_exists(self, mock_storage, mock_s3_client):
+        """Test storage skips S3 upload when artifact already exists."""
+        content = TEST_CONTENT_HELLO
+        s3_key = (
+            f"fruits/{TEST_HASH_HELLO[:2]}/{TEST_HASH_HELLO[2:4]}/{TEST_HASH_HELLO}"
+        )
+
+        # Pre-populate storage (simulate existing artifact)
+        mock_s3_client.objects[s3_key] = content
+
+        # Track put_object calls
+        original_put = mock_s3_client.put_object
+        put_called = []
+
+        def tracked_put(*args, **kwargs):
+            put_called.append(True)
+            return original_put(*args, **kwargs)
+
+        mock_s3_client.put_object = tracked_put
+
+        # Store the same content
+        file_obj = io.BytesIO(content)
+        result = mock_storage._store_simple(file_obj)
+
+        # put_object should NOT have been called (deduplication)
+        assert len(put_called) == 0
+        assert result.sha256 == TEST_HASH_HELLO
+
+    @pytest.mark.unit
+    def test_uploads_when_not_exists(self, mock_storage, mock_s3_client):
+        """Test storage uploads to S3 when artifact doesn't exist."""
+        content = b"brand new unique content"
+        content_hash = compute_sha256(content)
+        s3_key = f"fruits/{content_hash[:2]}/{content_hash[2:4]}/{content_hash}"
+
+        # Ensure object doesn't exist
+        assert s3_key not in mock_s3_client.objects
+
+        # Store the content
+        file_obj = io.BytesIO(content)
+        result = mock_storage._store_simple(file_obj)
+
+        # Object should now exist in mock storage
+        assert s3_key in mock_s3_client.objects
+        assert mock_s3_client.objects[s3_key] == content
+
+    @pytest.mark.unit
+    def test_returns_same_hash_for_duplicate(self, mock_storage, mock_s3_client):
+        """Test storing same content twice returns same hash."""
+        content = b"content to be stored twice"
+
+        # First store
+        file1 = io.BytesIO(content)
+        result1 = mock_storage._store_simple(file1)
+
+        # Second store (duplicate)
+        file2 = io.BytesIO(content)
+        result2 = mock_storage._store_simple(file2)
+
+        assert result1.sha256 == result2.sha256
+        assert result1.s3_key == result2.s3_key  # gitleaks:allow
+
+    @pytest.mark.unit
+    def test_different_content_different_keys(self, mock_storage):
+        """Test different content produces different S3 keys."""
+        content1 = b"first content"
+        content2 = b"second content"
+
+        file1 = io.BytesIO(content1)
+        result1 = mock_storage._store_simple(file1)
+
+        file2 = io.BytesIO(content2)
+        result2 = mock_storage._store_simple(file2)
+
+        assert result1.sha256 != result2.sha256
+        assert result1.s3_key != result2.s3_key  # gitleaks:allow
+
+
+# =============================================================================
+# Deduplication Edge Cases
+# =============================================================================
+
+
+class TestDeduplicationEdgeCases:
+    """Edge case tests for deduplication."""
+
+    @pytest.mark.unit
+    def test_same_content_different_filenames(self, mock_storage):
+        """Test same content with different metadata is deduplicated."""
+        content = b"identical content"
+
+        # Store with "filename1"
+        file1 = io.BytesIO(content)
+        result1 = mock_storage._store_simple(file1)
+
+        # Store with "filename2" (same content)
+        file2 = io.BytesIO(content)
+        result2 = mock_storage._store_simple(file2)
+
+        # Both should have same hash (content-addressable)
+        assert result1.sha256 == result2.sha256
+
+    @pytest.mark.unit
+    def test_whitespace_only_difference(self, mock_storage):
+        """Test content differing only by whitespace produces different hashes."""
+        content1 = b"test content"
+        content2 = b"test  content"  # Extra space
+        content3 = b"test content "  # Trailing space
+
+        file1 = io.BytesIO(content1)
+        file2 = io.BytesIO(content2)
+        file3 = io.BytesIO(content3)
+
+        result1 = mock_storage._store_simple(file1)
+        result2 = mock_storage._store_simple(file2)
+        result3 = mock_storage._store_simple(file3)
+
+        # All should be different (content-addressable)
+        assert len({result1.sha256, result2.sha256, result3.sha256}) == 3

docker-compose.local.yml

@@ -6,7 +6,7 @@ services:
       context: .
       dockerfile: Dockerfile.local
     ports:
-      - "8080:8080"
+      - "0.0.0.0:8080:8080"
     environment:
       - ORCHARD_SERVER_HOST=0.0.0.0
       - ORCHARD_SERVER_PORT=8080
@@ -24,6 +24,8 @@ services:
       - ORCHARD_S3_USE_PATH_STYLE=true
       - ORCHARD_REDIS_HOST=redis
       - ORCHARD_REDIS_PORT=6379
+      # Higher rate limit for local development/testing
+      - ORCHARD_LOGIN_RATE_LIMIT=1000/minute
     depends_on:
       postgres:
         condition: service_healthy
@@ -40,6 +42,15 @@ services:
       timeout: 3s
       start_period: 10s
       retries: 3
+    security_opt:
+      - no-new-privileges:true
+    cap_drop:
+      - ALL
+    deploy:
+      resources:
+        limits:
+          cpus: '1.0'
+          memory: 1G
 
   postgres:
     image: postgres:16-alpine
@@ -51,7 +62,7 @@ services:
       - postgres-data-local:/var/lib/postgresql/data
       - ./migrations:/docker-entrypoint-initdb.d:ro
     ports:
-      - "5432:5432"
+      - "127.0.0.1:5432:5432"
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U orchard -d orchard"]
       interval: 10s
@@ -60,6 +71,11 @@ services:
     networks:
       - orchard-network
     restart: unless-stopped
+    deploy:
+      resources:
+        limits:
+          cpus: '0.5'
+          memory: 512M
 
   minio:
     image: minio/minio:latest
@@ -70,8 +86,8 @@ services:
     volumes:
       - minio-data-local:/data
     ports:
-      - "9000:9000"
-      - "9001:9001"
+      - "127.0.0.1:9000:9000"
+      - "127.0.0.1:9001:9001"
     healthcheck:
       test: ["CMD", "mc", "ready", "local"]
       interval: 10s
@@ -80,6 +96,11 @@ services:
     networks:
       - orchard-network
     restart: unless-stopped
+    deploy:
+      resources:
+        limits:
+          cpus: '0.5'
+          memory: 512M
 
   minio-init:
     image: minio/mc:latest
@@ -95,6 +116,11 @@ services:
       "
     networks:
       - orchard-network
+    deploy:
+      resources:
+        limits:
+          cpus: '0.25'
+          memory: 128M
 
   redis:
     image: redis:7-alpine
@@ -102,7 +128,7 @@ services:
     volumes:
       - redis-data-local:/data
     ports:
-      - "6379:6379"
+      - "127.0.0.1:6379:6379"
     healthcheck:
       test: ["CMD", "redis-cli", "ping"]
       interval: 10s
@@ -111,6 +137,11 @@ services:
     networks:
       - orchard-network
     restart: unless-stopped
+    deploy:
+      resources:
+        limits:
+          cpus: '0.25'
+          memory: 256M
 
 volumes:
   postgres-data-local:

docker-compose.yml

@@ -6,7 +6,7 @@ services:
       context: .
       dockerfile: Dockerfile
     ports:
-      - "8080:8080"
+      - "127.0.0.1:8080:8080"
     environment:
       - ORCHARD_SERVER_HOST=0.0.0.0
       - ORCHARD_SERVER_PORT=8080
@@ -34,6 +34,21 @@ services:
     networks:
       - orchard-network
     restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/health"]
+      interval: 30s
+      timeout: 3s
+      start_period: 10s
+      retries: 3
+    security_opt:
+      - no-new-privileges:true
+    cap_drop:
+      - ALL
+    deploy:
+      resources:
+        limits:
+          cpus: '1.0'
+          memory: 1G
 
   postgres:
     image: containers.global.bsf.tools/postgres:16-alpine
@@ -45,7 +60,7 @@ services:
       - postgres-data:/var/lib/postgresql/data
       - ./migrations:/docker-entrypoint-initdb.d:ro
     ports:
-      - "5432:5432"
+      - "127.0.0.1:5432:5432"
     healthcheck:
       test: ["CMD-SHELL", "pg_isready -U orchard -d orchard"]
       interval: 10s
@@ -54,6 +69,15 @@ services:
     networks:
       - orchard-network
     restart: unless-stopped
+    security_opt:
+      - no-new-privileges:true
+    cap_drop:
+      - ALL
+    deploy:
+      resources:
+        limits:
+          cpus: '0.5'
+          memory: 512M
 
   minio:
     image: containers.global.bsf.tools/minio/minio:latest
@@ -64,8 +88,8 @@ services:
     volumes:
       - minio-data:/data
     ports:
-      - "9000:9000"
-      - "9001:9001"
+      - "127.0.0.1:9000:9000"
+      - "127.0.0.1:9001:9001"
     healthcheck:
       test: ["CMD", "mc", "ready", "local"]
       interval: 10s
@@ -74,6 +98,15 @@ services:
     networks:
       - orchard-network
     restart: unless-stopped
+    security_opt:
+      - no-new-privileges:true
+    cap_drop:
+      - ALL
+    deploy:
+      resources:
+        limits:
+          cpus: '0.5'
+          memory: 512M
 
   minio-init:
     image: containers.global.bsf.tools/minio/mc:latest
@@ -89,6 +122,15 @@ services:
       "
     networks:
       - orchard-network
+    security_opt:
+      - no-new-privileges:true
+    cap_drop:
+      - ALL
+    deploy:
+      resources:
+        limits:
+          cpus: '0.25'
+          memory: 128M
 
   redis:
     image: containers.global.bsf.tools/redis:7-alpine
@@ -96,7 +138,7 @@ services:
     volumes:
       - redis-data:/data
     ports:
-      - "6379:6379"
+      - "127.0.0.1:6379:6379"
     healthcheck:
       test: ["CMD", "redis-cli", "ping"]
       interval: 10s
@@ -105,6 +147,15 @@ services:
     networks:
       - orchard-network
     restart: unless-stopped
+    security_opt:
+      - no-new-privileges:true
+    cap_drop:
+      - ALL
+    deploy:
+      resources:
+        limits:
+          cpus: '0.25'
+          memory: 256M
 
 volumes:
   postgres-data:

docs/design/deduplication-design.md

@@ -0,0 +1,575 @@
+# Deduplication Design Document
+
+This document defines Orchard's content-addressable storage and deduplication approach using SHA256 hashes.
+
+## Table of Contents
+
+1. [Overview](#overview)
+2. [Hash Algorithm Selection](#hash-algorithm-selection)
+3. [Content-Addressable Storage Model](#content-addressable-storage-model)
+4. [S3 Key Derivation](#s3-key-derivation)
+5. [Duplicate Detection Strategy](#duplicate-detection-strategy)
+6. [Reference Counting Lifecycle](#reference-counting-lifecycle)
+7. [Edge Cases and Error Handling](#edge-cases-and-error-handling)
+8. [Collision Handling](#collision-handling)
+9. [Performance Considerations](#performance-considerations)
+10. [Operations Runbook](#operations-runbook)
+
+---
+
+## Overview
+
+Orchard uses **whole-file deduplication** based on content hashing. When a file is uploaded:
+
+1. The SHA256 hash of the entire file content is computed
+2. The hash becomes the artifact's primary identifier
+3. If a file with the same hash already exists, no duplicate is stored
+4. Multiple tags/references can point to the same artifact
+
+**Scope:** Orchard implements whole-file deduplication only. Chunk-level or block-level deduplication is out of scope for MVP.
+
+---
+
+## Hash Algorithm Selection
+
+### Decision: SHA256
+
+| Criteria | SHA256 | SHA1 | MD5 | Blake3 |
+|----------|--------|------|-----|--------|
+| Security | Strong (256-bit) | Weak (broken) | Weak (broken) | Strong |
+| Speed | ~400 MB/s | ~600 MB/s | ~800 MB/s | ~1500 MB/s |
+| Collision Resistance | 2^128 | Broken | Broken | 2^128 |
+| Industry Adoption | Universal | Legacy | Legacy | Emerging |
+| Tool Ecosystem | Excellent | Good | Good | Growing |
+
+### Rationale
+
+1. **Security**: SHA256 has no known practical collision attacks. SHA1 and MD5 are cryptographically broken.
+
+2. **Collision Resistance**: With 256-bit output, the probability of accidental collision is approximately 2^-128 (~10^-38). To have a 50% chance of collision, you would need approximately 2^128 unique files.
+
+3. **Industry Standard**: SHA256 is the de facto standard for content-addressable storage (Git, Docker, npm, etc.).
+
+4. **Performance**: While Blake3 is faster, SHA256 throughput (~400 MB/s) exceeds typical network bandwidth for uploads. The bottleneck is I/O, not hashing.
+
+5. **Tooling**: Universal support in all languages, operating systems, and verification tools.
+
+### Migration Path
+
+If a future algorithm change is needed (e.g., SHA3 or Blake3):
+
+1. **Database**: Add `hash_algorithm` column to artifacts table (default: 'sha256')
+2. **S3 Keys**: New algorithm uses different prefix (e.g., `fruits-sha3/` vs `fruits/`)
+3. **API**: Accept algorithm hint in upload, return algorithm in responses
+4. **Migration**: Background job to re-hash existing artifacts if needed
+
+**Current Implementation**: Single algorithm (SHA256), no algorithm versioning required for MVP.
+
+---
+
+## Content-Addressable Storage Model
+
+### Core Principles
+
+1. **Identity = Content**: The artifact ID IS the SHA256 hash of its content
+2. **Immutability**: Content cannot change after storage (same hash = same content)
+3. **Deduplication**: Same content uploaded twice results in single storage
+4. **Metadata Independence**: Files with identical content but different names/types are deduplicated
+
+### Data Model
+
+```
+Artifact {
+    id: VARCHAR(64) PRIMARY KEY  -- SHA256 hash (lowercase hex)
+    size: BIGINT                 -- File size in bytes
+    ref_count: INTEGER           -- Number of references
+    s3_key: VARCHAR(1024)        -- S3 storage path
+    checksum_md5: VARCHAR(32)    -- Secondary checksum
+    checksum_sha1: VARCHAR(40)   -- Secondary checksum
+    ...
+}
+
+Tag {
+    id: UUID PRIMARY KEY
+    name: VARCHAR(255)
+    package_id: UUID FK
+    artifact_id: VARCHAR(64) FK  -- Points to Artifact.id (SHA256)
+}
+```
+
+### Hash Format
+
+- Algorithm: SHA256
+- Output: 64 lowercase hexadecimal characters
+- Example: `dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986f`
+
+---
+
+## S3 Key Derivation
+
+### Key Structure
+
+```
+fruits/{hash[0:2]}/{hash[2:4]}/{full_hash}
+```
+
+Example for hash `dffd6021bb2bd5b0...`:
+```
+fruits/df/fd/dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986f
+```
+
+### Rationale for Prefix Sharding
+
+1. **S3 Performance**: S3 partitions by key prefix. Distributing across prefixes improves throughput.
+
+2. **Filesystem Compatibility**: When using filesystem-backed storage, avoids single directory with millions of files.
+
+3. **Distribution**: With 2-character prefixes (256 combinations each level), provides 65,536 (256 x 256) top-level buckets.
+
+### Bucket Distribution Analysis
+
+Assuming uniformly distributed SHA256 hashes:
+
+| Artifacts | Files per Prefix (avg) | Max per Prefix (99.9%) |
+|-----------|------------------------|------------------------|
+| 100,000 | 1.5 | 10 |
+| 1,000,000 | 15 | 50 |
+| 10,000,000 | 152 | 250 |
+| 100,000,000 | 1,525 | 2,000 |
+
+The two-level prefix provides excellent distribution up to hundreds of millions of artifacts.
+
+---
+
+## Duplicate Detection Strategy
+
+### Upload Flow
+
+```
+┌─────────────────────────────────────────────────────────────────┐
+│                        UPLOAD REQUEST                            │
+└─────────────────────────────────────────────────────────────────┘
+                              │
+                              ▼
+┌─────────────────────────────────────────────────────────────────┐
+│  1. VALIDATE: Check file size limits (min/max)                   │
+│     - Empty files (0 bytes) → Reject with 422                    │
+│     - Exceeds max_file_size → Reject with 413                    │
+└─────────────────────────────────────────────────────────────────┘
+                              │
+                              ▼
+┌─────────────────────────────────────────────────────────────────┐
+│  2. COMPUTE HASH: Stream file through SHA256/MD5/SHA1            │
+│     - Use 8MB chunks for memory efficiency                       │
+│     - Single pass for all three hashes                           │
+└─────────────────────────────────────────────────────────────────┘
+                              │
+                              ▼
+┌─────────────────────────────────────────────────────────────────┐
+│  3. DERIVE S3 KEY: fruits/{hash[0:2]}/{hash[2:4]}/{hash}        │
+└─────────────────────────────────────────────────────────────────┘
+                              │
+                              ▼
+┌─────────────────────────────────────────────────────────────────┐
+│  4. CHECK EXISTENCE: HEAD request to S3 for derived key          │
+│     - Retry up to 3 times on transient failures                  │
+└─────────────────────────────────────────────────────────────────┘
+                              │
+              ┌───────────────┴───────────────┐
+              ▼                               ▼
+┌─────────────────────────┐     ┌─────────────────────────────────┐
+│  EXISTS: Deduplicated    │     │  NOT EXISTS: Upload to S3       │
+│  - Verify size matches   │     │  - PUT object (or multipart)    │
+│  - Skip S3 upload        │     │  - Abort on failure             │
+│  - Log saved bytes       │     └─────────────────────────────────┘
+└─────────────────────────┘                   │
+              │                               │
+              └───────────────┬───────────────┘
+                              ▼
+┌─────────────────────────────────────────────────────────────────┐
+│  5. DATABASE: Create/update artifact record                      │
+│     - Use row locking to prevent race conditions                 │
+│     - ref_count managed by SQL triggers                          │
+└─────────────────────────────────────────────────────────────────┘
+                              │
+                              ▼
+┌─────────────────────────────────────────────────────────────────┐
+│  6. CREATE TAG: If tag provided, create/update tag               │
+│     - SQL trigger increments ref_count                           │
+└─────────────────────────────────────────────────────────────────┘
+```
+
+### Hash Computation
+
+**Memory Requirements:**
+- Chunk size: 8MB (`HASH_CHUNK_SIZE`)
+- Working memory: ~25MB (8MB chunk + hash states)
+- Independent of file size (streaming)
+
+**Throughput:**
+- SHA256 alone: ~400 MB/s on modern CPU
+- With MD5 + SHA1: ~300 MB/s (parallel computation)
+- Typical bottleneck: Network I/O, not CPU
+
+### Multipart Upload Threshold
+
+Files larger than 100MB use S3 multipart upload:
+- First pass: Stream to compute hashes
+- If not duplicate: Seek to start, upload in 10MB parts
+- On failure: Abort multipart upload (no orphaned parts)
+
+---
+
+## Reference Counting Lifecycle
+
+### What Constitutes a "Reference"
+
+A reference is a **Tag** pointing to an artifact. Each tag increments the ref_count by 1.
+
+**Uploads do NOT directly increment ref_count** - only tag creation does.
+
+### Lifecycle
+
+```
+┌─────────────────────────────────────────────────────────────────┐
+│  CREATE: New artifact uploaded                                   │
+│  - ref_count = 0 (no tags yet)                                   │
+│  - Artifact exists but is "orphaned"                             │
+└─────────────────────────────────────────────────────────────────┘
+                              │
+                              ▼
+┌─────────────────────────────────────────────────────────────────┐
+│  TAG CREATED: Tag points to artifact                             │
+│  - SQL trigger: ref_count += 1                                   │
+│  - Artifact is now referenced                                    │
+└─────────────────────────────────────────────────────────────────┘
+                              │
+                              ▼
+┌─────────────────────────────────────────────────────────────────┐
+│  TAG UPDATED: Tag moved to different artifact                    │
+│  - SQL trigger on old artifact: ref_count -= 1                   │
+│  - SQL trigger on new artifact: ref_count += 1                   │
+└─────────────────────────────────────────────────────────────────┘
+                              │
+                              ▼
+┌─────────────────────────────────────────────────────────────────┐
+│  TAG DELETED: Tag removed                                        │
+│  - SQL trigger: ref_count -= 1                                   │
+│  - If ref_count = 0, artifact is orphaned                        │
+└─────────────────────────────────────────────────────────────────┘
+                              │
+                              ▼
+┌─────────────────────────────────────────────────────────────────┐
+│  GARBAGE COLLECTION: Clean up orphaned artifacts                 │
+│  - Triggered manually via admin endpoint                         │
+│  - Finds artifacts where ref_count = 0                           │
+│  - Deletes from S3 and database                                  │
+└─────────────────────────────────────────────────────────────────┘
+```
+
+### SQL Triggers
+
+Three triggers manage ref_count automatically:
+
+1. **`tags_ref_count_insert_trigger`**: On tag INSERT, increment target artifact's ref_count
+2. **`tags_ref_count_delete_trigger`**: On tag DELETE, decrement target artifact's ref_count
+3. **`tags_ref_count_update_trigger`**: On tag UPDATE (artifact_id changed), decrement old, increment new
+
+### Garbage Collection
+
+**Trigger**: Manual admin endpoint (`POST /api/v1/admin/garbage-collect`)
+
+**Process**:
+1. Query artifacts where `ref_count = 0`
+2. For each orphan:
+   - Delete from S3 (`DELETE fruits/xx/yy/hash`)
+   - Delete from database
+   - Log deletion
+
+**Safety**: 
+- Dry-run mode by default (`?dry_run=true`)
+- Limit per run (`?limit=100`)
+- Check constraint prevents ref_count < 0
+
+---
+
+## Edge Cases and Error Handling
+
+### Empty Files
+
+- **Behavior**: Rejected with HTTP 422
+- **Reason**: Empty content has deterministic hash but provides no value
+- **Error**: "Empty files are not allowed"
+
+### Maximum File Size
+
+- **Default Limit**: 10GB (`ORCHARD_MAX_FILE_SIZE`)
+- **Configurable**: Via environment variable
+- **Behavior**: Rejected with HTTP 413 before upload begins
+- **Error**: "File too large. Maximum size is 10GB"
+
+### Concurrent Upload of Same Content
+
+**Race Condition Scenario**: Two clients upload identical content simultaneously.
+
+**Handling**:
+1. **S3 Level**: Both compute same hash, both check existence, both may upload
+2. **Database Level**: Row-level locking with `SELECT ... FOR UPDATE`
+3. **Outcome**: One creates artifact, other sees it exists, both succeed
+4. **Trigger Safety**: SQL triggers are atomic per row
+
+**No Data Corruption**: S3 is eventually consistent; identical content = identical result.
+
+### Upload Interrupted
+
+**Scenario**: Upload fails after hash computed but before S3 write completes.
+
+**Simple Upload**:
+- S3 put_object is atomic - either completes or fails entirely
+- No cleanup needed
+
+**Multipart Upload**:
+- On any failure, `abort_multipart_upload` is called
+- S3 cleans up partial parts
+- No orphaned data
+
+### DB Exists but S3 Missing
+
+**Detection**: Download request finds artifact in DB but S3 returns 404.
+
+**Current Behavior**: Return 500 error to client.
+
+**Recovery Options** (not yet implemented):
+1. Mark artifact for re-upload (set flag, notify admins)
+2. Decrement ref_count to trigger garbage collection
+3. Return specific error code for client retry
+
+**Recommended**: Log critical alert, return 503 with retry hint.
+
+### S3 Exists but DB Missing
+
+**Detection**: Orphan - file in S3 with no corresponding DB record.
+
+**Cause**: 
+- Failed transaction after S3 upload
+- Manual S3 manipulation
+- Database restore from backup
+
+**Recovery**: 
+- Garbage collection won't delete (no DB record to query)
+- Requires S3 bucket scan + DB reconciliation
+- Manual admin task (out of scope for MVP)
+
+### Network Timeout During Existence Check
+
+**Behavior**: Retry up to 3 times with adaptive backoff.
+
+**After Retries Exhausted**: Raise `S3ExistenceCheckError`, return 503 to client.
+
+**Rationale**: Don't upload without knowing if duplicate exists (prevents orphans).
+
+---
+
+## Collision Handling
+
+### SHA256 Collision Probability
+
+For random inputs, the probability of collision is:
+
+```
+P(collision) ≈ n² / 2^257
+
+Where n = number of unique files
+```
+
+| Files | Collision Probability |
+|-------|----------------------|
+| 10^9 (1 billion) | 10^-59 |
+| 10^12 (1 trillion) | 10^-53 |
+| 10^18 | 10^-41 |
+
+**Practical Assessment**: You would need to store more files than atoms in the observable universe to have meaningful collision risk.
+
+### Detection Mechanism
+
+Despite near-zero probability, we detect potential collisions by:
+
+1. **Size Comparison**: If hash matches but sizes differ, CRITICAL alert
+2. **ETag Verification**: S3 ETag provides secondary check
+
+### Handling Procedure
+
+If collision detected (size mismatch):
+
+1. **Log CRITICAL alert** with full details
+2. **Reject upload** with 500 error
+3. **Do NOT overwrite** existing content
+4. **Notify operations** for manual investigation
+
+```python
+raise HashCollisionError(
+    f"Hash collision detected for {sha256_hash}: size mismatch"
+)
+```
+
+### MVP Position
+
+For MVP, we:
+- Detect collisions via size mismatch
+- Log and alert on detection
+- Reject conflicting upload
+- Accept that true collisions are practically impossible
+
+No active mitigation (e.g., storing hash + size as composite key) is needed.
+
+---
+
+## Performance Considerations
+
+### Hash Computation Overhead
+
+| File Size | Hash Time | Upload Time (100 Mbps) | Overhead |
+|-----------|-----------|------------------------|----------|
+| 10 MB | 25ms | 800ms | 3% |
+| 100 MB | 250ms | 8s | 3% |
+| 1 GB | 2.5s | 80s | 3% |
+| 10 GB | 25s | 800s | 3% |
+
+**Conclusion**: Hash computation adds ~3% overhead regardless of file size. Network I/O dominates.
+
+### Existence Check Overhead
+
+- S3 HEAD request: ~50-100ms per call
+- Cached in future: Could use Redis/memory cache for hot paths
+- Current MVP: No caching (acceptable for expected load)
+
+### Deduplication Savings
+
+Example with 50% duplication rate:
+
+| Metric | Without Dedup | With Dedup | Savings |
+|--------|---------------|------------|---------|
+| Storage (100K files, 10MB avg) | 1 TB | 500 GB | 50% |
+| Upload bandwidth | 1 TB | 500 GB | 50% |
+| S3 costs | $23/mo | $11.50/mo | 50% |
+
+---
+
+## Operations Runbook
+
+### Monitoring Deduplication
+
+```bash
+# View deduplication stats
+curl http://orchard:8080/api/v1/stats/deduplication
+
+# Response includes:
+# - deduplication_ratio
+# - total_uploads, deduplicated_uploads
+# - bytes_saved
+```
+
+### Checking for Orphaned Artifacts
+
+```bash
+# List orphaned artifacts (ref_count = 0)
+curl http://orchard:8080/api/v1/admin/orphaned-artifacts
+
+# Dry-run garbage collection
+curl -X POST "http://orchard:8080/api/v1/admin/garbage-collect?dry_run=true"
+
+# Execute garbage collection
+curl -X POST "http://orchard:8080/api/v1/admin/garbage-collect?dry_run=false"
+```
+
+### Verifying Artifact Integrity
+
+```bash
+# Download and verify hash matches artifact ID
+ARTIFACT_ID="dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986f"
+curl -O http://orchard:8080/api/v1/artifact/$ARTIFACT_ID/download
+COMPUTED=$(sha256sum downloaded_file | cut -d' ' -f1)
+[ "$ARTIFACT_ID" = "$COMPUTED" ] && echo "OK" || echo "INTEGRITY FAILURE"
+```
+
+### Troubleshooting
+
+| Symptom | Likely Cause | Resolution |
+|---------|--------------|------------|
+| "Hash computation error" | Empty file or read error | Check file content, retry |
+| "Storage unavailable" | S3/MinIO down | Check S3 health, retry |
+| "File too large" | Exceeds max_file_size | Adjust config or use chunked upload |
+| "Hash collision detected" | Extremely rare | Investigate, do not ignore |
+| Orphaned artifacts accumulating | Tags deleted, no GC run | Run garbage collection |
+| Download returns 404 | S3 object missing | Check S3 bucket, restore from backup |
+
+### Configuration Reference
+
+| Variable | Default | Description |
+|----------|---------|-------------|
+| `ORCHARD_MAX_FILE_SIZE` | 10GB | Maximum upload size |
+| `ORCHARD_MIN_FILE_SIZE` | 1 | Minimum upload size (rejects empty) |
+| `ORCHARD_S3_MAX_RETRIES` | 3 | Retry attempts for S3 operations |
+| `ORCHARD_S3_CONNECT_TIMEOUT` | 10s | S3 connection timeout |
+| `ORCHARD_S3_READ_TIMEOUT` | 60s | S3 read timeout |
+
+---
+
+## Appendix: Decision Records
+
+### ADR-001: SHA256 for Content Hashing
+
+**Status**: Accepted
+
+**Context**: Need deterministic content identifier for deduplication.
+
+**Decision**: Use SHA256.
+
+**Rationale**: 
+- Cryptographically strong (no known attacks)
+- Universal adoption (Git, Docker, npm)
+- Sufficient speed for I/O-bound workloads
+- Excellent tooling
+
+**Consequences**:
+- 64-character artifact IDs (longer than UUIDs)
+- CPU overhead ~3% of upload time
+- Future algorithm migration requires versioning
+
+### ADR-002: Whole-File Deduplication Only
+
+**Status**: Accepted
+
+**Context**: Could implement chunk-level deduplication for better savings.
+
+**Decision**: Whole-file only for MVP.
+
+**Rationale**:
+- Simpler implementation
+- No chunking algorithm complexity
+- Sufficient for build artifact use case
+- Can add chunk-level later if needed
+
+**Consequences**:
+- Files with partial overlap stored entirely
+- Large files with small changes not deduplicated
+- Acceptable for binary artifact workloads
+
+### ADR-003: SQL Triggers for ref_count
+
+**Status**: Accepted
+
+**Context**: ref_count must be accurate for garbage collection.
+
+**Decision**: Use PostgreSQL triggers, not application code.
+
+**Rationale**:
+- Atomic with tag operations
+- Cannot be bypassed
+- Works regardless of client (API, direct SQL, migrations)
+- Simpler application code
+
+**Consequences**:
+- Trigger logic in SQL (less visible)
+- Must maintain triggers across schema changes
+- Debugging requires database access

docs/integrity-verification.md

@@ -0,0 +1,294 @@
+# Integrity Verification
+
+Orchard uses content-addressable storage with SHA256 hashing to ensure artifact integrity. This document describes how integrity verification works and how to use it.
+
+## How It Works
+
+### Content-Addressable Storage
+
+Orchard stores artifacts using their SHA256 hash as the unique identifier. This provides several benefits:
+
+1. **Automatic deduplication**: Identical content is stored only once
+2. **Built-in integrity**: The artifact ID *is* the content hash
+3. **Tamper detection**: Any modification changes the hash, making corruption detectable
+
+When you upload a file:
+1. Orchard computes the SHA256 hash of the content
+2. The hash becomes the artifact ID (64-character hex string)
+3. The file is stored in S3 at `fruits/{hash[0:2]}/{hash[2:4]}/{hash}`
+4. The hash and metadata are recorded in the database
+
+### Hash Format
+
+- Algorithm: SHA256
+- Format: 64-character lowercase hexadecimal string
+- Example: `dffd6021bb2bd5b0af676290809ec3a53191dd81c7f70a4b28688a362182986f`
+
+## Client-Side Verification
+
+### Before Upload
+
+Compute the hash locally before uploading to verify the server received your content correctly:
+
+```python
+import hashlib
+
+def compute_sha256(content: bytes) -> str:
+    return hashlib.sha256(content).hexdigest()
+
+# Compute hash before upload
+content = open("myfile.tar.gz", "rb").read()
+local_hash = compute_sha256(content)
+
+# Upload the file
+response = requests.post(
+    f"{base_url}/api/v1/project/{project}/{package}/upload",
+    files={"file": ("myfile.tar.gz", content)},
+)
+result = response.json()
+
+# Verify server computed the same hash
+assert result["artifact_id"] == local_hash, "Hash mismatch!"
+```
+
+### Providing Expected Hash on Upload
+
+You can provide the expected hash in the upload request. The server will reject the upload if the computed hash doesn't match:
+
+```python
+response = requests.post(
+    f"{base_url}/api/v1/project/{project}/{package}/upload",
+    files={"file": ("myfile.tar.gz", content)},
+    headers={"X-Checksum-SHA256": local_hash},
+)
+
+# Returns 422 if hash doesn't match
+if response.status_code == 422:
+    print("Checksum mismatch - upload rejected")
+```
+
+### After Download
+
+Verify downloaded content matches the expected hash using response headers:
+
+```python
+response = requests.get(
+    f"{base_url}/api/v1/project/{project}/{package}/+/{tag}",
+    params={"mode": "proxy"},
+)
+
+# Get expected hash from header
+expected_hash = response.headers.get("X-Checksum-SHA256")
+
+# Compute hash of downloaded content
+actual_hash = compute_sha256(response.content)
+
+# Verify
+if actual_hash != expected_hash:
+    raise Exception(f"Integrity check failed! Expected {expected_hash}, got {actual_hash}")
+```
+
+### Response Headers for Verification
+
+Download responses include multiple headers for verification:
+
+| Header | Format | Description |
+|--------|--------|-------------|
+| `X-Checksum-SHA256` | Hex string | SHA256 hash (64 chars) |
+| `ETag` | `"<hash>"` | SHA256 hash in quotes |
+| `Digest` | `sha-256=<base64>` | RFC 3230 format (base64-encoded) |
+| `Content-Length` | Integer | File size in bytes |
+
+### Server-Side Verification on Download
+
+Request server-side verification during download:
+
+```bash
+# Pre-verification: Server verifies before streaming (returns 500 if corrupt)
+curl "${base_url}/api/v1/project/${project}/${package}/+/${tag}?mode=proxy&verify=true&verify_mode=pre"
+
+# Stream verification: Server verifies while streaming (logs error if corrupt)
+curl "${base_url}/api/v1/project/${project}/${package}/+/${tag}?mode=proxy&verify=true&verify_mode=stream"
+```
+
+The `X-Verified` header indicates whether server-side verification was performed:
+- `X-Verified: true` - Content was verified by the server
+
+## Server-Side Consistency Check
+
+### Consistency Check Endpoint
+
+Administrators can run a consistency check to verify all stored artifacts:
+
+```bash
+curl "${base_url}/api/v1/admin/consistency-check"
+```
+
+Response:
+```json
+{
+  "total_artifacts_checked": 1234,
+  "healthy": true,
+  "orphaned_s3_objects": 0,
+  "missing_s3_objects": 0,
+  "size_mismatches": 0,
+  "orphaned_s3_keys": [],
+  "missing_s3_keys": [],
+  "size_mismatch_artifacts": []
+}
+```
+
+### What the Check Verifies
+
+1. **Missing S3 objects**: Database records with no corresponding S3 object
+2. **Orphaned S3 objects**: S3 objects with no database record
+3. **Size mismatches**: S3 object size doesn't match database record
+
+### Running Consistency Checks
+
+**Manual check:**
+```bash
+# Check all artifacts
+curl "${base_url}/api/v1/admin/consistency-check"
+
+# Limit results (for large deployments)
+curl "${base_url}/api/v1/admin/consistency-check?limit=100"
+```
+
+**Scheduled checks (recommended):**
+
+Set up a cron job or Kubernetes CronJob to run periodic checks:
+
+```yaml
+# Kubernetes CronJob example
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: orchard-consistency-check
+spec:
+  schedule: "0 2 * * *"  # Daily at 2 AM
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          containers:
+          - name: check
+            image: curlimages/curl
+            command:
+            - /bin/sh
+            - -c
+            - |
+              response=$(curl -s "${ORCHARD_URL}/api/v1/admin/consistency-check")
+              healthy=$(echo "$response" | jq -r '.healthy')
+              if [ "$healthy" != "true" ]; then
+                echo "ALERT: Consistency check failed!"
+                echo "$response"
+                exit 1
+              fi
+              echo "Consistency check passed"
+          restartPolicy: OnFailure
+```
+
+## Recovery Procedures
+
+### Corrupted Artifact (Size Mismatch)
+
+If the consistency check reports size mismatches:
+
+1. **Identify affected artifacts:**
+   ```bash
+   curl "${base_url}/api/v1/admin/consistency-check" | jq '.size_mismatch_artifacts'
+   ```
+
+2. **Check if artifact can be re-uploaded:**
+   - If the original content is available, delete the corrupted artifact and re-upload
+   - The same content will produce the same artifact ID
+
+3. **If original content is lost:**
+   - The artifact data is corrupted and cannot be recovered
+   - Delete the artifact record and notify affected users
+   - Consider restoring from backup if available
+
+### Missing S3 Object
+
+If database records exist but S3 objects are missing:
+
+1. **Identify affected artifacts:**
+   ```bash
+   curl "${base_url}/api/v1/admin/consistency-check" | jq '.missing_s3_keys'
+   ```
+
+2. **Check S3 bucket:**
+   - Verify the S3 bucket exists and is accessible
+   - Check S3 access logs for deletion events
+   - Check if objects were moved or lifecycle-deleted
+
+3. **Recovery options:**
+   - Restore from S3 versioning (if enabled)
+   - Restore from backup
+   - Re-upload original content (if available)
+   - Delete orphaned database records
+
+### Orphaned S3 Objects
+
+If S3 objects exist without database records:
+
+1. **Identify orphaned objects:**
+   ```bash
+   curl "${base_url}/api/v1/admin/consistency-check" | jq '.orphaned_s3_keys'
+   ```
+
+2. **Investigate cause:**
+   - Upload interrupted before database commit?
+   - Database record deleted but S3 cleanup failed?
+
+3. **Resolution:**
+   - If content is needed, create database record manually
+   - If content is not needed, delete the S3 object to reclaim storage
+
+### Preventive Measures
+
+1. **Enable S3 versioning** to recover from accidental deletions
+2. **Regular backups** of both database and S3 bucket
+3. **Scheduled consistency checks** to detect issues early
+4. **Monitoring and alerting** on consistency check failures
+5. **Audit logging** to track all artifact operations
+
+## Verification in CI/CD
+
+### Verifying Artifacts in Pipelines
+
+```bash
+#!/bin/bash
+# Download and verify artifact in CI pipeline
+
+ARTIFACT_URL="${ORCHARD_URL}/api/v1/project/${PROJECT}/${PACKAGE}/+/${TAG}"
+
+# Download with verification headers
+response=$(curl -s -D - "${ARTIFACT_URL}?mode=proxy" -o artifact.tar.gz)
+expected_hash=$(echo "$response" | grep -i "X-Checksum-SHA256" | cut -d: -f2 | tr -d ' \r')
+
+# Compute actual hash
+actual_hash=$(sha256sum artifact.tar.gz | cut -d' ' -f1)
+
+# Verify
+if [ "$actual_hash" != "$expected_hash" ]; then
+    echo "ERROR: Integrity check failed!"
+    echo "Expected: $expected_hash"
+    echo "Actual:   $actual_hash"
+    exit 1
+fi
+
+echo "Integrity verified: $actual_hash"
+```
+
+### Using Server-Side Verification
+
+For critical deployments, use server-side pre-verification:
+
+```bash
+# Server verifies before streaming - returns 500 if corrupt
+curl -f "${ARTIFACT_URL}?mode=proxy&verify=true&verify_mode=pre" -o artifact.tar.gz
+```
+
+This ensures the artifact is verified before any bytes are streamed to your pipeline.

frontend/index.html

@@ -2,9 +2,9 @@
 <html lang="en">
   <head>
     <meta charset="UTF-8" />
-    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <link rel="icon" type="image/svg+xml" href="/orchard.svg" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>Orchard - Content-Addressable Storage</title>
+    <title>Orchard</title>
   </head>
   <body>
     <div id="root"></div>

frontend/package.json

@@ -6,18 +6,34 @@
   "scripts": {
     "dev": "vite",
     "build": "tsc && vite build",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "test": "vitest",
+    "test:run": "vitest run",
+    "test:coverage": "vitest run --coverage"
   },
   "dependencies": {
     "react": "^18.2.0",
     "react-dom": "^18.2.0",
-    "react-router-dom": "^6.21.3"
+    "react-router-dom": "6.28.0"
   },
   "devDependencies": {
+    "@testing-library/jest-dom": "^6.4.2",
+    "@testing-library/react": "^14.2.1",
+    "@testing-library/user-event": "^14.5.2",
     "@types/react": "^18.2.48",
     "@types/react-dom": "^18.2.18",
     "@vitejs/plugin-react": "^4.2.1",
+    "@vitest/coverage-v8": "^1.3.1",
+    "jsdom": "^24.0.0",
     "typescript": "^5.3.3",
-    "vite": "^5.0.12"
+    "vite": "^5.0.12",
+    "vitest": "^1.3.1"
+  },
+  "overrides": {
+    "ws": "8.18.0",
+    "ufo": "1.5.4",
+    "rollup": "4.52.4",
+    "caniuse-lite": "1.0.30001692",
+    "baseline-browser-mapping": "2.9.5"
   }
 }

frontend/public/orchard.svg

@@ -0,0 +1,18 @@
+<svg width="32" height="32" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <!-- Green background -->
+  <rect width="24" height="24" rx="4" fill="#4CAF50"/>
+  <!-- Three fruit trees representing an orchard - shifted down to center -->
+  <g transform="translate(0, 2)">
+    <!-- Left tree - rounded canopy -->
+    <path d="M6 14 Q6 8 3 8 Q6 4 6 4 Q6 4 9 8 Q6 8 6 14" fill="white" opacity="0.7"/>
+    <rect x="5.25" y="13" width="1.5" height="4" fill="white" opacity="0.7"/>
+    <!-- Center tree - larger rounded canopy -->
+    <path d="M12 12 Q12 5 8 5 Q12 1 12 1 Q12 1 16 5 Q12 5 12 12" fill="white"/>
+    <rect x="11.25" y="11" width="1.5" height="5" fill="white"/>
+    <!-- Right tree - rounded canopy -->
+    <path d="M18 14 Q18 8 15 8 Q18 4 18 4 Q18 4 21 8 Q18 8 18 14" fill="white" opacity="0.7"/>
+    <rect x="17.25" y="13" width="1.5" height="4" fill="white" opacity="0.7"/>
+    <!-- Ground -->
+    <ellipse cx="12" cy="18" rx="8" ry="1.5" fill="white" opacity="0.4"/>
+  </g>
+</svg>

frontend/src/App.tsx

@@ -1,20 +1,65 @@
-import { Routes, Route } from 'react-router-dom';
+import { Routes, Route, Navigate, useLocation } from 'react-router-dom';
+import { AuthProvider, useAuth } from './contexts/AuthContext';
 import Layout from './components/Layout';
 import Home from './pages/Home';
 import ProjectPage from './pages/ProjectPage';
 import PackagePage from './pages/PackagePage';
 import Dashboard from './pages/Dashboard';
+import LoginPage from './pages/LoginPage';
+import ChangePasswordPage from './pages/ChangePasswordPage';
+import APIKeysPage from './pages/APIKeysPage';
+import AdminUsersPage from './pages/AdminUsersPage';
+import AdminOIDCPage from './pages/AdminOIDCPage';
+
+// Component that checks if user must change password
+function RequirePasswordChange({ children }: { children: React.ReactNode }) {
+  const { user, loading } = useAuth();
+  const location = useLocation();
+
+  if (loading) {
+    return null;
+  }
+
+  // If user is logged in and must change password, redirect to change password page
+  if (user?.must_change_password && location.pathname !== '/change-password') {
+    return <Navigate to="/change-password" replace />;
+  }
+
+  return <>{children}</>;
+}
+
+function AppRoutes() {
+  return (
+    <Routes>
+      <Route path="/login" element={<LoginPage />} />
+      <Route path="/change-password" element={<ChangePasswordPage />} />
+      <Route
+        path="*"
+        element={
+          <RequirePasswordChange>
+            <Layout>
+              <Routes>
+                <Route path="/" element={<Home />} />
+                <Route path="/dashboard" element={<Dashboard />} />
+                <Route path="/settings/api-keys" element={<APIKeysPage />} />
+                <Route path="/admin/users" element={<AdminUsersPage />} />
+                <Route path="/admin/oidc" element={<AdminOIDCPage />} />
+                <Route path="/project/:projectName" element={<ProjectPage />} />
+                <Route path="/project/:projectName/:packageName" element={<PackagePage />} />
+              </Routes>
+            </Layout>
+          </RequirePasswordChange>
+        }
+      />
+    </Routes>
+  );
+}
 
 function App() {
   return (
-    <Layout>
-      <Routes>
-        <Route path="/" element={<Home />} />
-        <Route path="/dashboard" element={<Dashboard />} />
-        <Route path="/project/:projectName" element={<ProjectPage />} />
-        <Route path="/project/:projectName/:packageName" element={<PackagePage />} />
-      </Routes>
-    </Layout>
+    <AuthProvider>
+      <AppRoutes />
+    </AuthProvider>
   );
 }
 

frontend/src/api.ts

@@ -17,14 +17,63 @@ import {
   DeduplicationStats,
   TimelineStats,
   CrossProjectStats,
+  User,
+  LoginCredentials,
+  APIKey,
+  APIKeyCreate,
+  APIKeyCreateResponse,
+  AdminUser,
+  UserCreate,
+  UserUpdate,
+  AccessPermission,
+  AccessPermissionCreate,
+  AccessPermissionUpdate,
+  AccessLevel,
+  OIDCConfig,
+  OIDCConfigUpdate,
+  OIDCStatus,
+  PackageVersion,
 } from './types';
 
 const API_BASE = '/api/v1';
 
+// Custom error classes for better error handling
+export class ApiError extends Error {
+  status: number;
+
+  constructor(message: string, status: number) {
+    super(message);
+    this.name = 'ApiError';
+    this.status = status;
+  }
+}
+
+export class UnauthorizedError extends ApiError {
+  constructor(message: string = 'Not authenticated') {
+    super(message, 401);
+    this.name = 'UnauthorizedError';
+  }
+}
+
+export class ForbiddenError extends ApiError {
+  constructor(message: string = 'Access denied') {
+    super(message, 403);
+    this.name = 'ForbiddenError';
+  }
+}
+
 async function handleResponse<T>(response: Response): Promise<T> {
   if (!response.ok) {
     const error = await response.json().catch(() => ({ detail: 'Unknown error' }));
-    throw new Error(error.detail || `HTTP ${response.status}`);
+    const message = error.detail || `HTTP ${response.status}`;
+
+    if (response.status === 401) {
+      throw new UnauthorizedError(message);
+    }
+    if (response.status === 403) {
+      throw new ForbiddenError(message);
+    }
+    throw new ApiError(message, response.status);
   }
   return response.json();
 }
@@ -40,6 +89,55 @@ function buildQueryString(params: Record<string, unknown>): string {
   return query ? `?${query}` : '';
 }
 
+// Auth API
+export async function login(credentials: LoginCredentials): Promise<User> {
+  const response = await fetch(`${API_BASE}/auth/login`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(credentials),
+    credentials: 'include',
+  });
+  return handleResponse<User>(response);
+}
+
+export async function logout(): Promise<void> {
+  const response = await fetch(`${API_BASE}/auth/logout`, {
+    method: 'POST',
+    credentials: 'include',
+  });
+  if (!response.ok) {
+    const error = await response.json().catch(() => ({ detail: 'Unknown error' }));
+    throw new Error(error.detail || `HTTP ${response.status}`);
+  }
+}
+
+export async function changePassword(currentPassword: string, newPassword: string): Promise<void> {
+  const response = await fetch(`${API_BASE}/auth/change-password`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ current_password: currentPassword, new_password: newPassword }),
+    credentials: 'include',
+  });
+  if (!response.ok) {
+    const error = await response.json().catch(() => ({ detail: 'Unknown error' }));
+    throw new Error(error.detail || `HTTP ${response.status}`);
+  }
+}
+
+export async function getCurrentUser(): Promise<User | null> {
+  try {
+    const response = await fetch(`${API_BASE}/auth/me`, {
+      credentials: 'include',
+    });
+    if (response.status === 401) {
+      return null;
+    }
+    return handleResponse<User>(response);
+  } catch {
+    return null;
+  }
+}
+
 // Global Search API
 export async function globalSearch(query: string, limit: number = 5): Promise<GlobalSearchResponse> {
   const params = buildQueryString({ q: query, limit });
@@ -142,12 +240,21 @@ export async function listPackageArtifacts(
 }
 
 // Upload
-export async function uploadArtifact(projectName: string, packageName: string, file: File, tag?: string): Promise<UploadResponse> {
+export async function uploadArtifact(
+  projectName: string,
+  packageName: string,
+  file: File,
+  tag?: string,
+  version?: string
+): Promise<UploadResponse> {
   const formData = new FormData();
   formData.append('file', file);
   if (tag) {
     formData.append('tag', tag);
   }
+  if (version) {
+    formData.append('version', version);
+  }
 
   const response = await fetch(`${API_BASE}/project/${projectName}/${packageName}/upload`, {
     method: 'POST',
@@ -186,3 +293,198 @@ export async function getCrossProjectStats(): Promise<CrossProjectStats> {
   const response = await fetch(`${API_BASE}/stats/cross-project`);
   return handleResponse<CrossProjectStats>(response);
 }
+
+export async function listAPIKeys(): Promise<APIKey[]> {
+  const response = await fetch(`${API_BASE}/auth/keys`, {
+    credentials: 'include',
+  });
+  return handleResponse<APIKey[]>(response);
+}
+
+export async function createAPIKey(data: APIKeyCreate): Promise<APIKeyCreateResponse> {
+  const response = await fetch(`${API_BASE}/auth/keys`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(data),
+    credentials: 'include',
+  });
+  return handleResponse<APIKeyCreateResponse>(response);
+}
+
+export async function deleteAPIKey(id: string): Promise<void> {
+  const response = await fetch(`${API_BASE}/auth/keys/${id}`, {
+    method: 'DELETE',
+    credentials: 'include',
+  });
+  if (!response.ok) {
+    const error = await response.json().catch(() => ({ detail: 'Unknown error' }));
+    throw new Error(error.detail || `HTTP ${response.status}`);
+  }
+}
+
+// Admin User Management API
+export async function listUsers(): Promise<AdminUser[]> {
+  const response = await fetch(`${API_BASE}/admin/users`, {
+    credentials: 'include',
+  });
+  return handleResponse<AdminUser[]>(response);
+}
+
+export async function createUser(data: UserCreate): Promise<AdminUser> {
+  const response = await fetch(`${API_BASE}/admin/users`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(data),
+    credentials: 'include',
+  });
+  return handleResponse<AdminUser>(response);
+}
+
+export async function updateUser(username: string, data: UserUpdate): Promise<AdminUser> {
+  const response = await fetch(`${API_BASE}/admin/users/${username}`, {
+    method: 'PUT',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(data),
+    credentials: 'include',
+  });
+  return handleResponse<AdminUser>(response);
+}
+
+export async function resetUserPassword(username: string, newPassword: string): Promise<void> {
+  const response = await fetch(`${API_BASE}/admin/users/${username}/reset-password`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ new_password: newPassword }),
+    credentials: 'include',
+  });
+  if (!response.ok) {
+    const error = await response.json().catch(() => ({ detail: 'Unknown error' }));
+    throw new Error(error.detail || `HTTP ${response.status}`);
+  }
+}
+
+// Access Permission API
+export interface MyAccessResponse {
+  project: string;
+  access_level: AccessLevel | null;
+  is_owner: boolean;
+}
+
+export async function getMyProjectAccess(projectName: string): Promise<MyAccessResponse> {
+  const response = await fetch(`${API_BASE}/project/${projectName}/my-access`, {
+    credentials: 'include',
+  });
+  return handleResponse<MyAccessResponse>(response);
+}
+
+export async function listProjectPermissions(projectName: string): Promise<AccessPermission[]> {
+  const response = await fetch(`${API_BASE}/project/${projectName}/permissions`, {
+    credentials: 'include',
+  });
+  return handleResponse<AccessPermission[]>(response);
+}
+
+export async function grantProjectAccess(
+  projectName: string,
+  data: AccessPermissionCreate
+): Promise<AccessPermission> {
+  const response = await fetch(`${API_BASE}/project/${projectName}/permissions`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(data),
+    credentials: 'include',
+  });
+  return handleResponse<AccessPermission>(response);
+}
+
+export async function updateProjectAccess(
+  projectName: string,
+  username: string,
+  data: AccessPermissionUpdate
+): Promise<AccessPermission> {
+  const response = await fetch(`${API_BASE}/project/${projectName}/permissions/${username}`, {
+    method: 'PUT',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(data),
+    credentials: 'include',
+  });
+  return handleResponse<AccessPermission>(response);
+}
+
+export async function revokeProjectAccess(projectName: string, username: string): Promise<void> {
+  const response = await fetch(`${API_BASE}/project/${projectName}/permissions/${username}`, {
+    method: 'DELETE',
+    credentials: 'include',
+  });
+  if (!response.ok) {
+    const error = await response.json().catch(() => ({ detail: 'Unknown error' }));
+    throw new Error(error.detail || `HTTP ${response.status}`);
+  }
+}
+
+// OIDC API
+export async function getOIDCStatus(): Promise<OIDCStatus> {
+  const response = await fetch(`${API_BASE}/auth/oidc/status`);
+  return handleResponse<OIDCStatus>(response);
+}
+
+export async function getOIDCConfig(): Promise<OIDCConfig> {
+  const response = await fetch(`${API_BASE}/auth/oidc/config`, {
+    credentials: 'include',
+  });
+  return handleResponse<OIDCConfig>(response);
+}
+
+export async function updateOIDCConfig(data: OIDCConfigUpdate): Promise<OIDCConfig> {
+  const response = await fetch(`${API_BASE}/auth/oidc/config`, {
+    method: 'PUT',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(data),
+    credentials: 'include',
+  });
+  return handleResponse<OIDCConfig>(response);
+}
+
+export function getOIDCLoginUrl(returnTo?: string): string {
+  const params = new URLSearchParams();
+  if (returnTo) {
+    params.set('return_to', returnTo);
+  }
+  const query = params.toString();
+  return `${API_BASE}/auth/oidc/login${query ? `?${query}` : ''}`;
+}
+
+// Version API
+export async function listVersions(
+  projectName: string,
+  packageName: string,
+  params: ListParams = {}
+): Promise<PaginatedResponse<PackageVersion>> {
+  const query = buildQueryString(params as Record<string, unknown>);
+  const response = await fetch(`${API_BASE}/project/${projectName}/${packageName}/versions${query}`);
+  return handleResponse<PaginatedResponse<PackageVersion>>(response);
+}
+
+export async function getVersion(
+  projectName: string,
+  packageName: string,
+  version: string
+): Promise<PackageVersion> {
+  const response = await fetch(`${API_BASE}/project/${projectName}/${packageName}/versions/${version}`);
+  return handleResponse<PackageVersion>(response);
+}
+
+export async function deleteVersion(
+  projectName: string,
+  packageName: string,
+  version: string
+): Promise<void> {
+  const response = await fetch(`${API_BASE}/project/${projectName}/${packageName}/versions/${version}`, {
+    method: 'DELETE',
+    credentials: 'include',
+  });
+  if (!response.ok) {
+    const error = await response.json().catch(() => ({ detail: 'Unknown error' }));
+    throw new Error(error.detail || `HTTP ${response.status}`);
+  }
+}

frontend/src/components/AccessManagement.css

@@ -0,0 +1,116 @@
+.access-management {
+  margin-top: 1.5rem;
+}
+
+.access-management__header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 1rem;
+}
+
+.access-management__header h3 {
+  margin: 0;
+}
+
+.access-management__form {
+  background: var(--bg-tertiary);
+  padding: 1rem;
+  border-radius: 6px;
+  margin-bottom: 1rem;
+}
+
+.access-management__form .form-row {
+  display: flex;
+  gap: 1rem;
+  align-items: flex-end;
+}
+
+.access-management__form .form-group {
+  flex: 1;
+}
+
+.access-management__form .form-group:last-of-type {
+  flex: 0 0 auto;
+}
+
+.access-management__list {
+  margin-top: 1rem;
+}
+
+.access-table {
+  width: 100%;
+  border-collapse: collapse;
+}
+
+.access-table th,
+.access-table td {
+  padding: 0.75rem;
+  text-align: left;
+  border-bottom: 1px solid var(--border-color);
+}
+
+.access-table th {
+  font-weight: 600;
+  color: var(--text-secondary);
+  font-size: 0.875rem;
+}
+
+.access-table td.actions {
+  display: flex;
+  gap: 0.5rem;
+}
+
+.access-badge {
+  display: inline-block;
+  padding: 0.25rem 0.5rem;
+  border-radius: 4px;
+  font-size: 0.75rem;
+  font-weight: 600;
+  text-transform: capitalize;
+}
+
+.access-badge--read {
+  background: var(--bg-tertiary);
+  color: var(--text-secondary);
+}
+
+.access-badge--write {
+  background: var(--color-info-bg);
+  color: var(--color-info);
+}
+
+.access-badge--admin {
+  background: var(--color-success-bg);
+  color: var(--color-success);
+}
+
+.btn-sm {
+  padding: 0.25rem 0.5rem;
+  font-size: 0.875rem;
+}
+
+.btn-danger {
+  background: var(--color-error);
+  color: white;
+}
+
+.btn-danger:hover {
+  background: #c0392b;
+}
+
+/* Expired permission styling */
+.expired {
+  color: var(--color-error);
+  font-weight: 500;
+}
+
+/* Date input styling in table */
+.access-table input[type="date"] {
+  padding: 0.25rem 0.5rem;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-primary);
+  border-radius: 4px;
+  font-size: 0.875rem;
+  color: var(--text-primary);
+}

frontend/src/components/AccessManagement.tsx

@@ -0,0 +1,296 @@
+import { useState, useEffect, useCallback } from 'react';
+import { AccessPermission, AccessLevel } from '../types';
+import {
+  listProjectPermissions,
+  grantProjectAccess,
+  updateProjectAccess,
+  revokeProjectAccess,
+} from '../api';
+import './AccessManagement.css';
+
+interface AccessManagementProps {
+  projectName: string;
+}
+
+export function AccessManagement({ projectName }: AccessManagementProps) {
+  const [permissions, setPermissions] = useState<AccessPermission[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [success, setSuccess] = useState<string | null>(null);
+
+  // Form state
+  const [showAddForm, setShowAddForm] = useState(false);
+  const [newUsername, setNewUsername] = useState('');
+  const [newLevel, setNewLevel] = useState<AccessLevel>('read');
+  const [newExpiresAt, setNewExpiresAt] = useState('');
+  const [submitting, setSubmitting] = useState(false);
+
+  // Edit state
+  const [editingUser, setEditingUser] = useState<string | null>(null);
+  const [editLevel, setEditLevel] = useState<AccessLevel>('read');
+  const [editExpiresAt, setEditExpiresAt] = useState('');
+
+  const loadPermissions = useCallback(async () => {
+    try {
+      setLoading(true);
+      const data = await listProjectPermissions(projectName);
+      setPermissions(data);
+      setError(null);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to load permissions');
+    } finally {
+      setLoading(false);
+    }
+  }, [projectName]);
+
+  useEffect(() => {
+    loadPermissions();
+  }, [loadPermissions]);
+
+  const handleGrant = async (e: React.FormEvent) => {
+    e.preventDefault();
+    if (!newUsername.trim()) return;
+
+    try {
+      setSubmitting(true);
+      setError(null);
+      await grantProjectAccess(projectName, {
+        username: newUsername.trim(),
+        level: newLevel,
+        expires_at: newExpiresAt || undefined,
+      });
+      setSuccess(`Access granted to ${newUsername}`);
+      setNewUsername('');
+      setNewLevel('read');
+      setNewExpiresAt('');
+      setShowAddForm(false);
+      await loadPermissions();
+      setTimeout(() => setSuccess(null), 3000);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to grant access');
+    } finally {
+      setSubmitting(false);
+    }
+  };
+
+  const handleUpdate = async (username: string) => {
+    try {
+      setSubmitting(true);
+      setError(null);
+      await updateProjectAccess(projectName, username, {
+        level: editLevel,
+        expires_at: editExpiresAt || null,
+      });
+      setSuccess(`Updated access for ${username}`);
+      setEditingUser(null);
+      await loadPermissions();
+      setTimeout(() => setSuccess(null), 3000);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to update access');
+    } finally {
+      setSubmitting(false);
+    }
+  };
+
+  const handleRevoke = async (username: string) => {
+    if (!confirm(`Revoke access for ${username}?`)) return;
+
+    try {
+      setSubmitting(true);
+      setError(null);
+      await revokeProjectAccess(projectName, username);
+      setSuccess(`Access revoked for ${username}`);
+      await loadPermissions();
+      setTimeout(() => setSuccess(null), 3000);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to revoke access');
+    } finally {
+      setSubmitting(false);
+    }
+  };
+
+  const startEdit = (permission: AccessPermission) => {
+    setEditingUser(permission.user_id);
+    setEditLevel(permission.level as AccessLevel);
+    // Convert ISO date to local date format for date input
+    setEditExpiresAt(permission.expires_at ? permission.expires_at.split('T')[0] : '');
+  };
+
+  const cancelEdit = () => {
+    setEditingUser(null);
+    setEditExpiresAt('');
+  };
+
+  const formatExpiration = (expiresAt: string | null) => {
+    if (!expiresAt) return 'Never';
+    const date = new Date(expiresAt);
+    const now = new Date();
+    const isExpired = date < now;
+    return (
+      <span className={isExpired ? 'expired' : ''}>
+        {date.toLocaleDateString()}
+        {isExpired && ' (Expired)'}
+      </span>
+    );
+  };
+
+  if (loading) {
+    return <div className="access-management loading">Loading permissions...</div>;
+  }
+
+  return (
+    <div className="access-management card">
+      <div className="access-management__header">
+        <h3>Access Management</h3>
+        <button
+          className="btn btn-primary btn-sm"
+          onClick={() => setShowAddForm(!showAddForm)}
+        >
+          {showAddForm ? 'Cancel' : '+ Add User'}
+        </button>
+      </div>
+
+      {error && <div className="error-message">{error}</div>}
+      {success && <div className="success-message">{success}</div>}
+
+      {showAddForm && (
+        <form className="access-management__form" onSubmit={handleGrant}>
+          <div className="form-row">
+            <div className="form-group">
+              <label htmlFor="username">Username</label>
+              <input
+                id="username"
+                type="text"
+                value={newUsername}
+                onChange={(e) => setNewUsername(e.target.value)}
+                placeholder="Enter username"
+                required
+                disabled={submitting}
+              />
+            </div>
+            <div className="form-group">
+              <label htmlFor="level">Access Level</label>
+              <select
+                id="level"
+                value={newLevel}
+                onChange={(e) => setNewLevel(e.target.value as AccessLevel)}
+                disabled={submitting}
+              >
+                <option value="read">Read</option>
+                <option value="write">Write</option>
+                <option value="admin">Admin</option>
+              </select>
+            </div>
+            <div className="form-group">
+              <label htmlFor="expires_at">Expires (optional)</label>
+              <input
+                id="expires_at"
+                type="date"
+                value={newExpiresAt}
+                onChange={(e) => setNewExpiresAt(e.target.value)}
+                disabled={submitting}
+                min={new Date().toISOString().split('T')[0]}
+              />
+            </div>
+            <button type="submit" className="btn btn-primary" disabled={submitting}>
+              {submitting ? 'Granting...' : 'Grant Access'}
+            </button>
+          </div>
+        </form>
+      )}
+
+      <div className="access-management__list">
+        {permissions.length === 0 ? (
+          <p className="text-muted">No explicit permissions set. Only the project owner has access.</p>
+        ) : (
+          <table className="access-table">
+            <thead>
+              <tr>
+                <th>User</th>
+                <th>Access Level</th>
+                <th>Granted</th>
+                <th>Expires</th>
+                <th>Actions</th>
+              </tr>
+            </thead>
+            <tbody>
+              {permissions.map((p) => (
+                <tr key={p.id}>
+                  <td>{p.user_id}</td>
+                  <td>
+                    {editingUser === p.user_id ? (
+                      <select
+                        value={editLevel}
+                        onChange={(e) => setEditLevel(e.target.value as AccessLevel)}
+                        disabled={submitting}
+                      >
+                        <option value="read">Read</option>
+                        <option value="write">Write</option>
+                        <option value="admin">Admin</option>
+                      </select>
+                    ) : (
+                      <span className={`access-badge access-badge--${p.level}`}>
+                        {p.level}
+                      </span>
+                    )}
+                  </td>
+                  <td>{new Date(p.created_at).toLocaleDateString()}</td>
+                  <td>
+                    {editingUser === p.user_id ? (
+                      <input
+                        type="date"
+                        value={editExpiresAt}
+                        onChange={(e) => setEditExpiresAt(e.target.value)}
+                        disabled={submitting}
+                        min={new Date().toISOString().split('T')[0]}
+                      />
+                    ) : (
+                      formatExpiration(p.expires_at)
+                    )}
+                  </td>
+                  <td className="actions">
+                    {editingUser === p.user_id ? (
+                      <>
+                        <button
+                          className="btn btn-sm btn-primary"
+                          onClick={() => handleUpdate(p.user_id)}
+                          disabled={submitting}
+                        >
+                          Save
+                        </button>
+                        <button
+                          className="btn btn-sm"
+                          onClick={cancelEdit}
+                          disabled={submitting}
+                        >
+                          Cancel
+                        </button>
+                      </>
+                    ) : (
+                      <>
+                        <button
+                          className="btn btn-sm"
+                          onClick={() => startEdit(p)}
+                          disabled={submitting}
+                        >
+                          Edit
+                        </button>
+                        <button
+                          className="btn btn-sm btn-danger"
+                          onClick={() => handleRevoke(p.user_id)}
+                          disabled={submitting}
+                        >
+                          Revoke
+                        </button>
+                      </>
+                    )}
+                  </td>
+                </tr>
+              ))}
+            </tbody>
+          </table>
+        )}
+      </div>
+    </div>
+  );
+}

frontend/src/components/DataTable.css

@@ -98,3 +98,58 @@
   text-overflow: ellipsis;
   white-space: nowrap;
 }
+
+/* Clickable rows */
+.data-table__row--clickable {
+  cursor: pointer;
+}
+
+.data-table__row--clickable:hover {
+  background: var(--bg-hover);
+}
+
+/* Responsive table wrapper */
+.data-table--responsive {
+  overflow-x: auto;
+  -webkit-overflow-scrolling: touch;
+}
+
+.data-table--responsive table {
+  min-width: 800px;
+}
+
+/* Cell with name and icon */
+.data-table .cell-name {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-weight: 500;
+  color: var(--text-primary);
+}
+
+.data-table .cell-name:hover {
+  color: var(--accent-primary);
+}
+
+/* Date cells */
+.data-table .cell-date {
+  color: var(--text-tertiary);
+  font-size: 0.8125rem;
+  white-space: nowrap;
+}
+
+/* Description cell */
+.data-table .cell-description {
+  max-width: 300px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  color: var(--text-secondary);
+  font-size: 0.875rem;
+}
+
+/* Owner cell */
+.data-table .cell-owner {
+  color: var(--text-secondary);
+  font-size: 0.875rem;
+}

frontend/src/components/DataTable.tsx

@@ -18,6 +18,7 @@ interface DataTableProps<T> {
   onSort?: (key: string) => void;
   sortKey?: string;
   sortOrder?: 'asc' | 'desc';
+  onRowClick?: (item: T) => void;
 }
 
 export function DataTable<T>({
@@ -29,6 +30,7 @@ export function DataTable<T>({
   onSort,
   sortKey,
   sortOrder,
+  onRowClick,
 }: DataTableProps<T>) {
   if (data.length === 0) {
     return (
@@ -71,7 +73,11 @@ export function DataTable<T>({
         </thead>
         <tbody>
           {data.map((item) => (
-            <tr key={keyExtractor(item)}>
+            <tr
+              key={keyExtractor(item)}
+              onClick={() => onRowClick?.(item)}
+              className={onRowClick ? 'data-table__row--clickable' : ''}
+            >
               {columns.map((column) => (
                 <td key={column.key} className={column.className}>
                   {column.render(item)}

frontend/src/components/DragDropUpload.css

@@ -0,0 +1,332 @@
+.drag-drop-upload {
+  width: 100%;
+}
+
+/* Offline Banner */
+.offline-banner {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.75rem 1rem;
+  background: var(--warning-bg, #fff3cd);
+  border: 1px solid var(--warning-border, #ffc107);
+  border-radius: 8px;
+  margin-bottom: 1rem;
+  color: var(--warning-text, #856404);
+  font-size: 0.875rem;
+}
+
+.offline-banner svg {
+  flex-shrink: 0;
+}
+
+/* Drop Zone */
+.drop-zone {
+  border: 2px dashed var(--border-color, #ddd);
+  border-radius: 8px;
+  padding: 2rem;
+  text-align: center;
+  cursor: pointer;
+  transition: all 0.2s ease;
+  background: var(--bg-secondary, #f9f9f9);
+}
+
+.drop-zone:hover {
+  border-color: var(--accent-color, #007bff);
+  background: var(--bg-hover, #f0f7ff);
+}
+
+.drop-zone--active {
+  border-color: var(--accent-color, #007bff);
+  background: var(--bg-active, #e6f0ff);
+  border-style: solid;
+}
+
+.drop-zone--disabled {
+  cursor: not-allowed;
+  opacity: 0.6;
+  background: var(--bg-disabled, #f5f5f5);
+}
+
+.drop-zone--disabled:hover {
+  border-color: var(--border-color, #ddd);
+  background: var(--bg-disabled, #f5f5f5);
+}
+
+.drop-zone__input {
+  display: none;
+}
+
+.drop-zone__content {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 0.75rem;
+  color: var(--text-secondary, #666);
+}
+
+.drop-zone__content svg {
+  opacity: 0.5;
+}
+
+.drop-zone--active .drop-zone__content svg {
+  opacity: 1;
+  color: var(--accent-color, #007bff);
+}
+
+.drop-zone__text {
+  margin: 0;
+  font-size: 1rem;
+}
+
+.drop-zone__text strong {
+  color: var(--text-primary, #333);
+}
+
+.drop-zone__hint {
+  margin: 0;
+  font-size: 0.8rem;
+  opacity: 0.7;
+}
+
+/* Upload Queue */
+.upload-queue {
+  margin-top: 1rem;
+  border: 1px solid var(--border-color, #ddd);
+  border-radius: 8px;
+  overflow: hidden;
+}
+
+.upload-queue__header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 0.75rem 1rem;
+  background: var(--bg-secondary, #f9f9f9);
+  border-bottom: 1px solid var(--border-color, #ddd);
+}
+
+.upload-queue__title {
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: var(--text-primary, #333);
+}
+
+.upload-queue__clear {
+  padding: 0.25rem 0.5rem;
+  font-size: 0.75rem;
+  border: none;
+  background: none;
+  color: var(--accent-color, #007bff);
+  cursor: pointer;
+}
+
+.upload-queue__clear:hover {
+  text-decoration: underline;
+}
+
+.upload-queue__overall {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  padding: 0.5rem 1rem;
+  background: var(--bg-secondary, #f9f9f9);
+  border-bottom: 1px solid var(--border-color, #ddd);
+}
+
+.upload-queue__overall .progress-bar {
+  flex: 1;
+}
+
+.upload-queue__overall .progress-bar__text {
+  font-size: 0.75rem;
+  font-weight: 500;
+  color: var(--text-secondary, #666);
+  min-width: 3rem;
+  text-align: right;
+}
+
+.upload-queue__list {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  max-height: 300px;
+  overflow-y: auto;
+}
+
+/* Upload Item */
+.upload-item {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  padding: 0.75rem 1rem;
+  border-bottom: 1px solid var(--border-color-light, #eee);
+}
+
+.upload-item:last-child {
+  border-bottom: none;
+}
+
+.upload-item__icon {
+  flex-shrink: 0;
+  width: 24px;
+  height: 24px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: var(--text-secondary, #666);
+}
+
+.upload-item--complete .upload-item__icon {
+  color: var(--success-color, #28a745);
+}
+
+.upload-item--failed .upload-item__icon {
+  color: var(--error-color, #dc3545);
+}
+
+.upload-item--uploading .upload-item__icon {
+  color: var(--accent-color, #007bff);
+}
+
+.upload-item--paused .upload-item__icon {
+  color: var(--warning-color, #ffc107);
+}
+
+.upload-item--validating .upload-item__icon {
+  color: var(--accent-color, #007bff);
+}
+
+.spinner-icon {
+  animation: spin 1s linear infinite;
+}
+
+@keyframes spin {
+  from { transform: rotate(0deg); }
+  to { transform: rotate(360deg); }
+}
+
+.upload-item__info {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 0.25rem;
+}
+
+.upload-item__name {
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: var(--text-primary, #333);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.upload-item__meta {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 0.5rem;
+  font-size: 0.75rem;
+  color: var(--text-secondary, #666);
+}
+
+.upload-item__size {
+  color: var(--text-secondary, #666);
+}
+
+.upload-item__speed,
+.upload-item__eta {
+  color: var(--accent-color, #007bff);
+}
+
+.upload-item__artifact {
+  color: var(--success-color, #28a745);
+  font-family: monospace;
+}
+
+.upload-item__error {
+  color: var(--error-color, #dc3545);
+}
+
+.upload-item__retry-count {
+  color: var(--warning-color, #ffc107);
+}
+
+.upload-item__validating {
+  color: var(--accent-color, #007bff);
+  font-style: italic;
+}
+
+.upload-item__actions {
+  display: flex;
+  gap: 0.25rem;
+  flex-shrink: 0;
+}
+
+.upload-item__btn {
+  width: 28px;
+  height: 28px;
+  border: none;
+  background: none;
+  cursor: pointer;
+  border-radius: 4px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: var(--text-secondary, #666);
+  transition: all 0.15s ease;
+}
+
+.upload-item__btn:hover {
+  background: var(--bg-hover, #f0f0f0);
+}
+
+.upload-item__btn--retry:hover {
+  color: var(--accent-color, #007bff);
+}
+
+.upload-item__btn--remove:hover {
+  color: var(--error-color, #dc3545);
+}
+
+/* Progress Bar */
+.progress-bar {
+  height: 8px;
+  background: var(--border-color, #ddd);
+  border-radius: 4px;
+  overflow: hidden;
+}
+
+.progress-bar--small {
+  height: 4px;
+  margin-top: 0.25rem;
+}
+
+.progress-bar__fill {
+  height: 100%;
+  background: var(--accent-color, #007bff);
+  border-radius: 4px;
+  transition: width 0.2s ease;
+}
+
+.upload-item--complete .progress-bar__fill {
+  background: var(--success-color, #28a745);
+}
+
+/* Responsive */
+@media (max-width: 480px) {
+  .drop-zone {
+    padding: 1.5rem 1rem;
+  }
+
+  .upload-item__meta {
+    flex-direction: column;
+    gap: 0.125rem;
+  }
+
+  .upload-item__speed,
+  .upload-item__eta {
+    display: none;
+  }
+}

frontend/src/components/DragDropUpload.test.tsx

@@ -0,0 +1,545 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { render, screen, fireEvent, waitFor } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { DragDropUpload } from './DragDropUpload';
+
+function createMockFile(name: string, size: number, type: string): File {
+  const content = new Array(size).fill('a').join('');
+  return new File([content], name, { type });
+}
+
+function createMockXHR(options: {
+  status?: number;
+  response?: object;
+  progressEvents?: { loaded: number; total: number }[];
+  shouldError?: boolean;
+  shouldTimeout?: boolean;
+} = {}) {
+  const {
+    status = 200,
+    response = { artifact_id: 'abc123', size: 100 },
+    progressEvents = [],
+    shouldError = false,
+    shouldTimeout = false,
+  } = options;
+
+  return class MockXHR {
+    status = status;
+    responseText = JSON.stringify(response);
+    timeout = 0;
+    upload = {
+      addEventListener: vi.fn((event: string, handler: (e: ProgressEvent) => void) => {
+        if (event === 'progress') {
+          progressEvents.forEach((p, i) => {
+            setTimeout(() => {
+              handler({ lengthComputable: true, loaded: p.loaded, total: p.total } as ProgressEvent);
+            }, i * 10);
+          });
+        }
+      }),
+    };
+    addEventListener = vi.fn((event: string, handler: () => void) => {
+      if (event === 'load' && !shouldError && !shouldTimeout) {
+        setTimeout(handler, progressEvents.length * 10 + 10);
+      }
+      if (event === 'error' && shouldError) {
+        setTimeout(handler, 10);
+      }
+      if (event === 'timeout' && shouldTimeout) {
+        setTimeout(handler, 10);
+      }
+    });
+    open = vi.fn();
+    send = vi.fn();
+  };
+}
+
+describe('DragDropUpload', () => {
+  const defaultProps = {
+    projectName: 'test-project',
+    packageName: 'test-package',
+  };
+
+  beforeEach(() => {
+    vi.useFakeTimers({ shouldAdvanceTime: true });
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
+    vi.restoreAllMocks();
+  });
+
+  describe('Rendering', () => {
+    it('renders drop zone with instructional text', () => {
+      render(<DragDropUpload {...defaultProps} />);
+      
+      expect(screen.getByText(/drag files here/i)).toBeInTheDocument();
+      expect(screen.getByText(/click to browse/i)).toBeInTheDocument();
+    });
+
+    it('renders hidden file input', () => {
+      render(<DragDropUpload {...defaultProps} />);
+      
+      const input = document.querySelector('input[type="file"]');
+      expect(input).toBeInTheDocument();
+      expect(input).toHaveClass('drop-zone__input');
+    });
+
+    it('shows max file size hint when provided', () => {
+      render(<DragDropUpload {...defaultProps} maxFileSize={1024 * 1024} />);
+      
+      expect(screen.getByText(/max file size: 1 mb/i)).toBeInTheDocument();
+    });
+
+    it('shows allowed types hint when provided', () => {
+      render(<DragDropUpload {...defaultProps} allowedTypes={['.zip', '.tar.gz']} allowAllTypes={false} />);
+      
+      expect(screen.getByText(/\.zip, \.tar\.gz/i)).toBeInTheDocument();
+    });
+  });
+
+  describe('Click to Browse', () => {
+    it('opens file picker when drop zone is clicked', async () => {
+      render(<DragDropUpload {...defaultProps} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const clickSpy = vi.spyOn(input, 'click');
+      
+      const dropZone = screen.getByRole('button');
+      await userEvent.click(dropZone);
+      
+      expect(clickSpy).toHaveBeenCalled();
+    });
+
+    it('opens file picker on Enter key', () => {
+      render(<DragDropUpload {...defaultProps} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const clickSpy = vi.spyOn(input, 'click');
+      
+      const dropZone = screen.getByRole('button');
+      fireEvent.keyDown(dropZone, { key: 'Enter' });
+      
+      expect(clickSpy).toHaveBeenCalled();
+    });
+  });
+
+  describe('Drag and Drop Events', () => {
+    it('shows visual feedback on drag over', () => {
+      render(<DragDropUpload {...defaultProps} />);
+      
+      const dropZone = screen.getByRole('button');
+      
+      fireEvent.dragEnter(dropZone, {
+        dataTransfer: { items: [{}] },
+      });
+      
+      expect(dropZone).toHaveClass('drop-zone--active');
+    });
+
+    it('removes visual feedback on drag leave', () => {
+      render(<DragDropUpload {...defaultProps} />);
+      
+      const dropZone = screen.getByRole('button');
+      
+      fireEvent.dragEnter(dropZone, { dataTransfer: { items: [{}] } });
+      expect(dropZone).toHaveClass('drop-zone--active');
+      
+      fireEvent.dragLeave(dropZone);
+      expect(dropZone).not.toHaveClass('drop-zone--active');
+    });
+
+    it('accepts dropped files', async () => {
+      const MockXHR = createMockXHR();
+      vi.stubGlobal('XMLHttpRequest', MockXHR);
+      
+      render(<DragDropUpload {...defaultProps} />);
+      
+      const dropZone = screen.getByRole('button');
+      const file = createMockFile('test.txt', 100, 'text/plain');
+      
+      const dataTransfer = new DataTransfer();
+      Object.defineProperty(dataTransfer, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.drop(dropZone, { dataTransfer });
+      
+      await waitFor(() => {
+        expect(screen.getByText('test.txt')).toBeInTheDocument();
+      });
+    });
+  });
+
+  describe('File Validation', () => {
+    it('rejects files exceeding max size', async () => {
+      render(<DragDropUpload {...defaultProps} maxFileSize={100} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const file = createMockFile('large.txt', 200, 'text/plain');
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await waitFor(() => {
+        expect(screen.getByText(/exceeds.*limit/i)).toBeInTheDocument();
+      });
+    });
+
+    it('rejects files with invalid type when allowAllTypes is false', async () => {
+      render(<DragDropUpload {...defaultProps} allowedTypes={['.zip']} allowAllTypes={false} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const file = createMockFile('test.txt', 100, 'text/plain');
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await waitFor(() => {
+        expect(screen.getByText(/not allowed/i)).toBeInTheDocument();
+      });
+    });
+
+    it('rejects empty files', async () => {
+      render(<DragDropUpload {...defaultProps} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const file = createMockFile('empty.txt', 0, 'text/plain');
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await waitFor(() => {
+        expect(screen.getByText(/empty file/i)).toBeInTheDocument();
+      });
+    });
+
+    it('accepts valid files when allowAllTypes is true', async () => {
+      const MockXHR = createMockXHR();
+      vi.stubGlobal('XMLHttpRequest', MockXHR);
+      
+      render(<DragDropUpload {...defaultProps} allowAllTypes={true} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const file = createMockFile('test.txt', 100, 'text/plain');
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await waitFor(() => {
+        expect(screen.getByText('test.txt')).toBeInTheDocument();
+        expect(screen.queryByText(/not allowed/i)).not.toBeInTheDocument();
+      });
+    });
+  });
+
+  describe('Upload Queue', () => {
+    it('shows file in queue after selection', async () => {
+      const MockXHR = createMockXHR();
+      vi.stubGlobal('XMLHttpRequest', MockXHR);
+      
+      render(<DragDropUpload {...defaultProps} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const file = createMockFile('document.pdf', 1024, 'application/pdf');
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await waitFor(() => {
+        expect(screen.getByText('document.pdf')).toBeInTheDocument();
+        expect(screen.getByText('1 KB')).toBeInTheDocument();
+      });
+    });
+
+    it('handles multiple files', async () => {
+      const MockXHR = createMockXHR();
+      vi.stubGlobal('XMLHttpRequest', MockXHR);
+      
+      render(<DragDropUpload {...defaultProps} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const files = [
+        createMockFile('file1.txt', 100, 'text/plain'),
+        createMockFile('file2.txt', 200, 'text/plain'),
+        createMockFile('file3.txt', 300, 'text/plain'),
+      ];
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign(files, { item: (i: number) => files[i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await waitFor(() => {
+        expect(screen.getByText('file1.txt')).toBeInTheDocument();
+        expect(screen.getByText('file2.txt')).toBeInTheDocument();
+        expect(screen.getByText('file3.txt')).toBeInTheDocument();
+      });
+    });
+
+    it('shows overall progress for multiple files', async () => {
+      const MockXHR = createMockXHR();
+      vi.stubGlobal('XMLHttpRequest', MockXHR);
+      
+      render(<DragDropUpload {...defaultProps} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const files = [
+        createMockFile('file1.txt', 100, 'text/plain'),
+        createMockFile('file2.txt', 100, 'text/plain'),
+      ];
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign(files, { item: (i: number) => files[i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await waitFor(() => {
+        expect(screen.getByText(/uploading.*of.*files/i)).toBeInTheDocument();
+      });
+    });
+  });
+
+  describe('Upload Progress', () => {
+    it('shows progress bar during upload', async () => {
+      const MockXHR = createMockXHR({
+        progressEvents: [
+          { loaded: 50, total: 100 },
+        ],
+      });
+      vi.stubGlobal('XMLHttpRequest', MockXHR);
+      
+      render(<DragDropUpload {...defaultProps} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const file = createMockFile('test.txt', 100, 'text/plain');
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await waitFor(() => {
+        const progressBar = document.querySelector('.progress-bar__fill');
+        expect(progressBar).toBeInTheDocument();
+      });
+    });
+  });
+
+  describe('Upload Completion', () => {
+    it('shows success state when upload completes', async () => {
+      const MockXHR = createMockXHR({
+        response: { artifact_id: 'abc123def456', size: 100 },
+      });
+      vi.stubGlobal('XMLHttpRequest', MockXHR);
+      
+      const onComplete = vi.fn();
+      render(<DragDropUpload {...defaultProps} onUploadComplete={onComplete} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const file = createMockFile('test.txt', 100, 'text/plain');
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await vi.advanceTimersByTimeAsync(100);
+      
+      await waitFor(() => {
+        expect(screen.getByText(/abc123def456/i)).toBeInTheDocument();
+      });
+    });
+
+    it('calls onUploadComplete callback with results', async () => {
+      const MockXHR = createMockXHR({
+        response: { artifact_id: 'test-artifact-id', size: 100 },
+      });
+      vi.stubGlobal('XMLHttpRequest', MockXHR);
+      
+      const onComplete = vi.fn();
+      render(<DragDropUpload {...defaultProps} onUploadComplete={onComplete} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const file = createMockFile('test.txt', 100, 'text/plain');
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await vi.advanceTimersByTimeAsync(100);
+      
+      await waitFor(() => {
+        expect(onComplete).toHaveBeenCalledWith([
+          expect.objectContaining({ artifact_id: 'test-artifact-id' }),
+        ]);
+      });
+    });
+  });
+
+  describe('Upload Errors', () => {
+    it('shows error state when upload fails after retries exhausted', async () => {
+      const MockXHR = createMockXHR({
+        status: 500,
+        response: { detail: 'Server error' },
+        shouldError: true,
+      });
+      vi.stubGlobal('XMLHttpRequest', MockXHR);
+      
+      render(<DragDropUpload {...defaultProps} maxRetries={0} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const file = createMockFile('test.txt', 100, 'text/plain');
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await vi.advanceTimersByTimeAsync(100);
+      
+      await waitFor(() => {
+        expect(screen.getByText(/network error/i)).toBeInTheDocument();
+      });
+    });
+
+    it('calls onUploadError callback when retries exhausted', async () => {
+      const MockXHR = createMockXHR({ shouldError: true });
+      vi.stubGlobal('XMLHttpRequest', MockXHR);
+      
+      const onError = vi.fn();
+      render(<DragDropUpload {...defaultProps} maxRetries={0} onUploadError={onError} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const file = createMockFile('test.txt', 100, 'text/plain');
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await vi.advanceTimersByTimeAsync(100);
+      
+      await waitFor(() => {
+        expect(onError).toHaveBeenCalled();
+      });
+    });
+  });
+
+  describe('Queue Actions', () => {
+    it('removes item from queue when remove button clicked', async () => {
+      const MockXHR = createMockXHR();
+      vi.stubGlobal('XMLHttpRequest', MockXHR);
+      
+      render(<DragDropUpload {...defaultProps} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const file = createMockFile('test.txt', 100, 'text/plain');
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await vi.advanceTimersByTimeAsync(100);
+      
+      await waitFor(() => {
+        expect(screen.getByText('test.txt')).toBeInTheDocument();
+      });
+      
+      const removeButton = screen.getByTitle('Remove');
+      fireEvent.click(removeButton);
+      
+      await waitFor(() => {
+        expect(screen.queryByText('test.txt')).not.toBeInTheDocument();
+      });
+    });
+
+    it('clears completed items when clear button clicked', async () => {
+      const MockXHR = createMockXHR();
+      vi.stubGlobal('XMLHttpRequest', MockXHR);
+      
+      render(<DragDropUpload {...defaultProps} />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const file = createMockFile('test.txt', 100, 'text/plain');
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await vi.advanceTimersByTimeAsync(100);
+      
+      await waitFor(() => {
+        const clearButton = screen.queryByText(/clear finished/i);
+        if (clearButton) {
+          fireEvent.click(clearButton);
+        }
+      });
+    });
+  });
+
+  describe('Tag Support', () => {
+    it('includes tag in upload request', async () => {
+      let capturedFormData: FormData | null = null;
+      
+      class MockXHR {
+        status = 200;
+        responseText = JSON.stringify({ artifact_id: 'abc123', size: 100 });
+        timeout = 0;
+        upload = { addEventListener: vi.fn() };
+        addEventListener = vi.fn((event: string, handler: () => void) => {
+          if (event === 'load') setTimeout(handler, 10);
+        });
+        open = vi.fn();
+        send = vi.fn((data: FormData) => {
+          capturedFormData = data;
+        });
+      }
+      vi.stubGlobal('XMLHttpRequest', MockXHR);
+      
+      render(<DragDropUpload {...defaultProps} tag="v1.0.0" />);
+      
+      const input = document.querySelector('input[type="file"]') as HTMLInputElement;
+      const file = createMockFile('test.txt', 100, 'text/plain');
+      
+      Object.defineProperty(input, 'files', {
+        value: Object.assign([file], { item: (i: number) => [file][i] }),
+      });
+      
+      fireEvent.change(input);
+      
+      await vi.advanceTimersByTimeAsync(100);
+      
+      await waitFor(() => {
+        expect(capturedFormData?.get('tag')).toBe('v1.0.0');
+      });
+    });
+  });
+});

frontend/src/components/DragDropUpload.tsx

@@ -0,0 +1,912 @@
+import { useState, useRef, useCallback, useEffect } from 'react';
+import './DragDropUpload.css';
+
+const CHUNK_SIZE = 10 * 1024 * 1024;
+const CHUNKED_UPLOAD_THRESHOLD = 100 * 1024 * 1024;
+const UPLOAD_STATE_PREFIX = 'orchard_upload_';
+
+interface StoredUploadState {
+  uploadId: string;
+  fileHash: string;
+  filename: string;
+  fileSize: number;
+  completedParts: number[];
+  project: string;
+  package: string;
+  tag?: string;
+  createdAt: number;
+}
+
+function getUploadStateKey(project: string, pkg: string, fileHash: string): string {
+  return `${UPLOAD_STATE_PREFIX}${project}_${pkg}_${fileHash}`;
+}
+
+function saveUploadState(state: StoredUploadState): void {
+  try {
+    const key = getUploadStateKey(state.project, state.package, state.fileHash);
+    localStorage.setItem(key, JSON.stringify(state));
+  } catch {
+    // localStorage might be full or unavailable
+  }
+}
+
+function loadUploadState(project: string, pkg: string, fileHash: string): StoredUploadState | null {
+  try {
+    const key = getUploadStateKey(project, pkg, fileHash);
+    const stored = localStorage.getItem(key);
+    if (!stored) return null;
+    const state = JSON.parse(stored) as StoredUploadState;
+    const oneDay = 24 * 60 * 60 * 1000;
+    if (Date.now() - state.createdAt > oneDay) {
+      localStorage.removeItem(key);
+      return null;
+    }
+    return state;
+  } catch {
+    return null;
+  }
+}
+
+function clearUploadState(project: string, pkg: string, fileHash: string): void {
+  try {
+    const key = getUploadStateKey(project, pkg, fileHash);
+    localStorage.removeItem(key);
+  } catch {
+    // ignore
+  }
+}
+
+// Types
+export type UploadStatus = 'pending' | 'uploading' | 'complete' | 'failed' | 'validating' | 'paused';
+
+export interface UploadItem {
+  id: string;
+  file: File;
+  status: UploadStatus;
+  progress: number;
+  speed: number; // bytes per second
+  error?: string;
+  artifactId?: string;
+  retryCount: number;
+  startTime?: number;
+}
+
+export interface UploadResult {
+  artifact_id: string;
+  size: number;
+  deduplicated?: boolean;
+}
+
+export interface DragDropUploadProps {
+  projectName: string;
+  packageName: string;
+  onUploadComplete?: (results: UploadResult[]) => void;
+  onUploadError?: (error: string) => void;
+  allowedTypes?: string[]; // e.g., ['.tar.gz', '.zip', '.deb']
+  allowAllTypes?: boolean;
+  maxFileSize?: number; // in bytes
+  maxConcurrentUploads?: number;
+  maxRetries?: number;
+  tag?: string;
+  className?: string;
+  disabled?: boolean;
+  disabledReason?: string;
+}
+
+// Utility functions
+function generateId(): string {
+  return `${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
+}
+
+function formatBytes(bytes: number): string {
+  if (bytes === 0) return '0 B';
+  const k = 1024;
+  const sizes = ['B', 'KB', 'MB', 'GB', 'TB'];
+  const i = Math.floor(Math.log(bytes) / Math.log(k));
+  return parseFloat((bytes / Math.pow(k, i)).toFixed(1)) + ' ' + sizes[i];
+}
+
+function formatSpeed(bytesPerSecond: number): string {
+  return `${formatBytes(bytesPerSecond)}/s`;
+}
+
+function formatTimeRemaining(seconds: number): string {
+  if (!isFinite(seconds) || seconds < 0) return '--:--';
+  if (seconds < 60) return `${Math.round(seconds)}s`;
+  if (seconds < 3600) return `${Math.floor(seconds / 60)}m ${Math.round(seconds % 60)}s`;
+  return `${Math.floor(seconds / 3600)}h ${Math.floor((seconds % 3600) / 60)}m`;
+}
+
+function getFileExtension(filename: string): string {
+  const parts = filename.toLowerCase().split('.');
+  if (parts.length >= 3 && parts[parts.length - 2] === 'tar') {
+    return `.${parts.slice(-2).join('.')}`;
+  }
+  return parts.length > 1 ? `.${parts[parts.length - 1]}` : '';
+}
+
+async function computeSHA256(file: File): Promise<string> {
+  const buffer = await file.arrayBuffer();
+  const hashBuffer = await crypto.subtle.digest('SHA-256', buffer);
+  const hashArray = Array.from(new Uint8Array(hashBuffer));
+  return hashArray.map(b => b.toString(16).padStart(2, '0')).join('');
+}
+
+// Icons
+function UploadIcon() {
+  return (
+    <svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.5">
+      <path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4" />
+      <polyline points="17 8 12 3 7 8" />
+      <line x1="12" y1="3" x2="12" y2="15" />
+    </svg>
+  );
+}
+
+function CheckIcon() {
+  return (
+    <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+      <polyline points="20 6 9 17 4 12" />
+    </svg>
+  );
+}
+
+function ErrorIcon() {
+  return (
+    <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+      <circle cx="12" cy="12" r="10" />
+      <line x1="15" y1="9" x2="9" y2="15" />
+      <line x1="9" y1="9" x2="15" y2="15" />
+    </svg>
+  );
+}
+
+function RetryIcon() {
+  return (
+    <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+      <polyline points="23 4 23 10 17 10" />
+      <path d="M20.49 15a9 9 0 1 1-2.12-9.36L23 10" />
+    </svg>
+  );
+}
+
+function RemoveIcon() {
+  return (
+    <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+      <line x1="18" y1="6" x2="6" y2="18" />
+      <line x1="6" y1="6" x2="18" y2="18" />
+    </svg>
+  );
+}
+
+function FileIcon() {
+  return (
+    <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.5">
+      <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z" />
+      <polyline points="14 2 14 8 20 8" />
+    </svg>
+  );
+}
+
+function PauseIcon() {
+  return (
+    <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+      <rect x="6" y="4" width="4" height="16" />
+      <rect x="14" y="4" width="4" height="16" />
+    </svg>
+  );
+}
+
+function WifiOffIcon() {
+  return (
+    <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+      <line x1="1" y1="1" x2="23" y2="23" />
+      <path d="M16.72 11.06A10.94 10.94 0 0 1 19 12.55" />
+      <path d="M5 12.55a10.94 10.94 0 0 1 5.17-2.39" />
+      <path d="M10.71 5.05A16 16 0 0 1 22.58 9" />
+      <path d="M1.42 9a15.91 15.91 0 0 1 4.7-2.88" />
+      <path d="M8.53 16.11a6 6 0 0 1 6.95 0" />
+      <line x1="12" y1="20" x2="12.01" y2="20" />
+    </svg>
+  );
+}
+
+function SpinnerIcon() {
+  return (
+    <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" className="spinner-icon">
+      <circle cx="12" cy="12" r="10" strokeOpacity="0.25" />
+      <path d="M12 2a10 10 0 0 1 10 10" />
+    </svg>
+  );
+}
+
+export function DragDropUpload({
+  projectName,
+  packageName,
+  onUploadComplete,
+  onUploadError,
+  allowedTypes,
+  allowAllTypes = true,
+  maxFileSize,
+  maxConcurrentUploads = 3,
+  maxRetries = 3,
+  tag,
+  className = '',
+  disabled = false,
+  disabledReason,
+}: DragDropUploadProps) {
+  const [isDragOver, setIsDragOver] = useState(false);
+  const [uploadQueue, setUploadQueue] = useState<UploadItem[]>([]);
+  const [isOnline, setIsOnline] = useState(navigator.onLine);
+  const fileInputRef = useRef<HTMLInputElement>(null);
+  const dragCounterRef = useRef(0);
+  const activeUploadsRef = useRef(0);
+  const xhrMapRef = useRef<Map<string, XMLHttpRequest>>(new Map());
+
+  // Online/Offline detection
+  useEffect(() => {
+    const handleOnline = () => {
+      setIsOnline(true);
+      // Resume paused uploads
+      setUploadQueue(prev => prev.map(item => 
+        item.status === 'paused' 
+          ? { ...item, status: 'pending' as UploadStatus, error: undefined }
+          : item
+      ));
+    };
+
+    const handleOffline = () => {
+      setIsOnline(false);
+      // Pause uploading items and cancel their XHR requests
+      setUploadQueue(prev => prev.map(item => {
+        if (item.status === 'uploading') {
+          // Abort the XHR request
+          const xhr = xhrMapRef.current.get(item.id);
+          if (xhr) {
+            xhr.abort();
+            xhrMapRef.current.delete(item.id);
+          }
+          return { ...item, status: 'paused' as UploadStatus, error: 'Network offline - will resume when connection is restored', progress: 0 };
+        }
+        if (item.status === 'pending') {
+          return { ...item, status: 'paused' as UploadStatus, error: 'Network offline - waiting for connection' };
+        }
+        return item;
+      }));
+    };
+
+    window.addEventListener('online', handleOnline);
+    window.addEventListener('offline', handleOffline);
+
+    return () => {
+      window.removeEventListener('online', handleOnline);
+      window.removeEventListener('offline', handleOffline);
+    };
+  }, []);
+
+  // Validate a single file
+  const validateFile = useCallback((file: File): string | null => {
+    // Check file size
+    if (maxFileSize && file.size > maxFileSize) {
+      return `File exceeds ${formatBytes(maxFileSize)} limit`;
+    }
+
+    // Check file type if not allowing all types
+    if (!allowAllTypes && allowedTypes && allowedTypes.length > 0) {
+      const ext = getFileExtension(file.name);
+      if (!allowedTypes.some(t => t.toLowerCase() === ext)) {
+        return `File type ${ext || 'unknown'} not allowed. Accepted: ${allowedTypes.join(', ')}`;
+      }
+    }
+
+    // Check for empty file
+    if (file.size === 0) {
+      return 'Cannot upload empty file';
+    }
+
+    return null;
+  }, [allowedTypes, allowAllTypes, maxFileSize]);
+
+  // Add files to queue
+  const addFiles = useCallback((files: FileList | File[]) => {
+    const newItems: UploadItem[] = Array.from(files).map(file => {
+      const validationError = validateFile(file);
+      return {
+        id: generateId(),
+        file,
+        status: validationError ? 'failed' : 'pending',
+        progress: 0,
+        speed: 0,
+        error: validationError || undefined,
+        retryCount: 0,
+      };
+    });
+
+    setUploadQueue(prev => [...prev, ...newItems]);
+  }, [validateFile]);
+
+  const uploadFileChunked = useCallback(async (item: UploadItem): Promise<UploadResult> => {
+    setUploadQueue(prev => prev.map(u => 
+      u.id === item.id 
+        ? { ...u, status: 'validating' as UploadStatus, startTime: Date.now() }
+        : u
+    ));
+
+    const fileHash = await computeSHA256(item.file);
+    
+    const storedState = loadUploadState(projectName, packageName, fileHash);
+    let uploadId: string;
+    let completedParts: number[] = [];
+
+    if (storedState && storedState.fileSize === item.file.size && storedState.filename === item.file.name) {
+      try {
+        const statusResponse = await fetch(
+          `/api/v1/project/${projectName}/${packageName}/upload/${storedState.uploadId}/status`
+        );
+        if (statusResponse.ok) {
+          const statusData = await statusResponse.json();
+          uploadId = storedState.uploadId;
+          completedParts = statusData.uploaded_parts || [];
+        } else {
+          throw new Error('Stored upload no longer valid');
+        }
+      } catch {
+        clearUploadState(projectName, packageName, fileHash);
+        uploadId = await initNewUpload();
+      }
+    } else {
+      uploadId = await initNewUpload();
+    }
+
+    async function initNewUpload(): Promise<string> {
+      const initResponse = await fetch(
+        `/api/v1/project/${projectName}/${packageName}/upload/init`,
+        {
+          method: 'POST',
+          headers: { 'Content-Type': 'application/json' },
+          body: JSON.stringify({
+            expected_hash: fileHash,
+            filename: item.file.name,
+            size: item.file.size,
+            tag: tag || undefined,
+          }),
+        }
+      );
+
+      if (!initResponse.ok) {
+        const error = await initResponse.json().catch(() => ({}));
+        throw new Error(error.detail || `Init failed: ${initResponse.status}`);
+      }
+
+      const initData = await initResponse.json();
+
+      if (initData.already_exists) {
+        throw { deduplicated: true, artifact_id: initData.artifact_id };
+      }
+
+      saveUploadState({
+        uploadId: initData.upload_id,
+        fileHash,
+        filename: item.file.name,
+        fileSize: item.file.size,
+        completedParts: [],
+        project: projectName,
+        package: packageName,
+        tag: tag || undefined,
+        createdAt: Date.now(),
+      });
+
+      return initData.upload_id;
+    }
+
+    const totalChunks = Math.ceil(item.file.size / CHUNK_SIZE);
+    let uploadedBytes = completedParts.length * CHUNK_SIZE;
+    if (uploadedBytes > item.file.size) uploadedBytes = item.file.size - (item.file.size % CHUNK_SIZE);
+    const startTime = Date.now();
+
+    for (let partNumber = 1; partNumber <= totalChunks; partNumber++) {
+      if (completedParts.includes(partNumber)) {
+        continue;
+      }
+
+      if (!isOnline) {
+        throw new Error('Network offline');
+      }
+
+      const start = (partNumber - 1) * CHUNK_SIZE;
+      const end = Math.min(start + CHUNK_SIZE, item.file.size);
+      const chunk = item.file.slice(start, end);
+
+      const partResponse = await fetch(
+        `/api/v1/project/${projectName}/${packageName}/upload/${uploadId}/part/${partNumber}`,
+        {
+          method: 'PUT',
+          body: chunk,
+        }
+      );
+
+      if (!partResponse.ok) {
+        throw new Error(`Part ${partNumber} upload failed: ${partResponse.status}`);
+      }
+
+      completedParts.push(partNumber);
+      saveUploadState({
+        uploadId,
+        fileHash,
+        filename: item.file.name,
+        fileSize: item.file.size,
+        completedParts,
+        project: projectName,
+        package: packageName,
+        tag: tag || undefined,
+        createdAt: Date.now(),
+      });
+
+      uploadedBytes += chunk.size;
+      const elapsed = (Date.now() - startTime) / 1000;
+      const speed = elapsed > 0 ? uploadedBytes / elapsed : 0;
+      const progress = Math.round((uploadedBytes / item.file.size) * 100);
+
+      setUploadQueue(prev => prev.map(u => 
+        u.id === item.id 
+          ? { ...u, progress, speed, status: 'uploading' as UploadStatus }
+          : u
+      ));
+    }
+
+    const completeResponse = await fetch(
+      `/api/v1/project/${projectName}/${packageName}/upload/${uploadId}/complete`,
+      {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ tag: tag || undefined }),
+      }
+    );
+
+    if (!completeResponse.ok) {
+      throw new Error(`Complete failed: ${completeResponse.status}`);
+    }
+
+    clearUploadState(projectName, packageName, fileHash);
+
+    const completeData = await completeResponse.json();
+    return {
+      artifact_id: completeData.artifact_id,
+      size: completeData.size,
+      deduplicated: false,
+    };
+  }, [projectName, packageName, tag, isOnline]);
+
+  const uploadFileSimple = useCallback((item: UploadItem): Promise<UploadResult> => {
+    return new Promise((resolve, reject) => {
+      const xhr = new XMLHttpRequest();
+      xhrMapRef.current.set(item.id, xhr);
+      
+      const formData = new FormData();
+      formData.append('file', item.file);
+      if (tag) {
+        formData.append('tag', tag);
+      }
+
+      let lastLoaded = 0;
+      let lastTime = Date.now();
+
+      xhr.upload.addEventListener('progress', (e) => {
+        if (e.lengthComputable) {
+          const now = Date.now();
+          const timeDiff = (now - lastTime) / 1000;
+          const loadedDiff = e.loaded - lastLoaded;
+          
+          const speed = timeDiff > 0 ? loadedDiff / timeDiff : 0;
+          const progress = Math.round((e.loaded / e.total) * 100);
+
+          setUploadQueue(prev => prev.map(u => 
+            u.id === item.id 
+              ? { ...u, progress, speed, status: 'uploading' as UploadStatus }
+              : u
+          ));
+
+          lastLoaded = e.loaded;
+          lastTime = now;
+        }
+      });
+
+      xhr.addEventListener('load', () => {
+        xhrMapRef.current.delete(item.id);
+        if (xhr.status >= 200 && xhr.status < 300) {
+          try {
+            const result = JSON.parse(xhr.responseText) as UploadResult;
+            resolve(result);
+          } catch {
+            reject(new Error('Invalid response from server'));
+          }
+        } else {
+          try {
+            const error = JSON.parse(xhr.responseText);
+            reject(new Error(error.detail || `Upload failed: ${xhr.status}`));
+          } catch {
+            reject(new Error(`Upload failed: ${xhr.status}`));
+          }
+        }
+      });
+
+      xhr.addEventListener('error', () => {
+        xhrMapRef.current.delete(item.id);
+        reject(new Error('Network error - check your connection'));
+      });
+
+      xhr.addEventListener('timeout', () => {
+        xhrMapRef.current.delete(item.id);
+        reject(new Error('Upload timed out'));
+      });
+
+      xhr.addEventListener('abort', () => {
+        xhrMapRef.current.delete(item.id);
+        reject(new Error('Upload cancelled'));
+      });
+
+      xhr.open('POST', `/api/v1/project/${projectName}/${packageName}/upload`);
+      xhr.timeout = 300000;
+      xhr.send(formData);
+
+      setUploadQueue(prev => prev.map(u => 
+        u.id === item.id 
+          ? { ...u, status: 'uploading' as UploadStatus, startTime: Date.now() }
+          : u
+      ));
+    });
+  }, [projectName, packageName, tag]);
+
+  const uploadFile = useCallback((item: UploadItem): Promise<UploadResult> => {
+    if (item.file.size >= CHUNKED_UPLOAD_THRESHOLD) {
+      return uploadFileChunked(item);
+    }
+    return uploadFileSimple(item);
+  }, [uploadFileChunked, uploadFileSimple]);
+
+  const processQueue = useCallback(async () => {
+    if (!isOnline) return;
+    
+    const pendingItems = uploadQueue.filter(item => item.status === 'pending');
+    
+    for (const item of pendingItems) {
+      if (activeUploadsRef.current >= maxConcurrentUploads) {
+        break;
+      }
+
+      activeUploadsRef.current++;
+
+      // Start upload
+      setUploadQueue(prev => prev.map(u => 
+        u.id === item.id ? { ...u, status: 'uploading' as UploadStatus } : u
+      ));
+
+      try {
+        const result = await uploadFile(item);
+        
+        setUploadQueue(prev => prev.map(u => 
+          u.id === item.id 
+            ? { ...u, status: 'complete' as UploadStatus, progress: 100, artifactId: result.artifact_id }
+            : u
+        ));
+      } catch (err: unknown) {
+        const dedupErr = err as { deduplicated?: boolean; artifact_id?: string };
+        if (dedupErr.deduplicated && dedupErr.artifact_id) {
+          setUploadQueue(prev => prev.map(u => 
+            u.id === item.id 
+              ? { ...u, status: 'complete' as UploadStatus, progress: 100, artifactId: dedupErr.artifact_id }
+              : u
+          ));
+        } else {
+          const errorMessage = err instanceof Error ? err.message : 'Upload failed';
+          const shouldRetry = item.retryCount < maxRetries && 
+            (errorMessage.includes('Network') || errorMessage.includes('timeout'));
+
+          if (shouldRetry) {
+            const delay = Math.pow(2, item.retryCount) * 1000;
+            setTimeout(() => {
+              setUploadQueue(prev => prev.map(u => 
+                u.id === item.id 
+                  ? { ...u, status: 'pending' as UploadStatus, retryCount: u.retryCount + 1, progress: 0 }
+                  : u
+              ));
+            }, delay);
+          } else {
+            setUploadQueue(prev => prev.map(u => 
+              u.id === item.id 
+                ? { ...u, status: 'failed' as UploadStatus, error: errorMessage }
+                : u
+            ));
+            onUploadError?.(errorMessage);
+          }
+        }
+      } finally {
+        activeUploadsRef.current--;
+      }
+    }
+  }, [uploadQueue, maxConcurrentUploads, maxRetries, uploadFile, onUploadError, isOnline]);
+
+  useEffect(() => {
+    const hasPending = uploadQueue.some(item => item.status === 'pending');
+    if (hasPending && activeUploadsRef.current < maxConcurrentUploads && isOnline) {
+      processQueue();
+    }
+
+    const allComplete = uploadQueue.length > 0 && 
+      uploadQueue.every(item => item.status === 'complete' || item.status === 'failed');
+    
+    if (allComplete) {
+      const completedResults = uploadQueue
+        .filter(item => item.status === 'complete' && item.artifactId)
+        .map(item => ({
+          artifact_id: item.artifactId!,
+          size: item.file.size,
+        }));
+      
+      if (completedResults.length > 0) {
+        onUploadComplete?.(completedResults);
+      }
+    }
+  }, [uploadQueue, maxConcurrentUploads, processQueue, onUploadComplete, isOnline]);
+
+  // Drag event handlers
+  const handleDragEnter = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    if (disabled) return;
+    dragCounterRef.current++;
+    if (e.dataTransfer.items && e.dataTransfer.items.length > 0) {
+      setIsDragOver(true);
+    }
+  }, [disabled]);
+
+  const handleDragLeave = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    if (disabled) return;
+    dragCounterRef.current--;
+    if (dragCounterRef.current === 0) {
+      setIsDragOver(false);
+    }
+  }, [disabled]);
+
+  const handleDragOver = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+  }, []);
+
+  const handleDrop = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setIsDragOver(false);
+    dragCounterRef.current = 0;
+
+    if (disabled) return;
+
+    const files = e.dataTransfer.files;
+    if (files && files.length > 0) {
+      addFiles(files);
+    }
+  }, [addFiles, disabled]);
+
+  // Click to browse
+  const handleClick = useCallback(() => {
+    if (disabled) return;
+    fileInputRef.current?.click();
+  }, [disabled]);
+
+  const handleFileChange = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
+    if (disabled) return;
+    const files = e.target.files;
+    if (files && files.length > 0) {
+      addFiles(files);
+    }
+    // Reset input so same file can be selected again
+    if (fileInputRef.current) {
+      fileInputRef.current.value = '';
+    }
+  }, [addFiles, disabled]);
+
+  // Remove item from queue
+  const removeItem = useCallback((id: string) => {
+    setUploadQueue(prev => prev.filter(item => item.id !== id));
+  }, []);
+
+  // Retry failed upload
+  const retryItem = useCallback((id: string) => {
+    setUploadQueue(prev => prev.map(item => 
+      item.id === id 
+        ? { ...item, status: 'pending' as UploadStatus, error: undefined, progress: 0, retryCount: 0 }
+        : item
+    ));
+  }, []);
+
+  // Clear completed/failed items
+  const clearCompleted = useCallback(() => {
+    setUploadQueue(prev => prev.filter(item => 
+      item.status !== 'complete' && item.status !== 'failed'
+    ));
+  }, []);
+
+  // Calculate overall progress
+  const overallProgress = uploadQueue.length > 0
+    ? Math.round(uploadQueue.reduce((sum, item) => sum + item.progress, 0) / uploadQueue.length)
+    : 0;
+
+  const completedCount = uploadQueue.filter(item => item.status === 'complete').length;
+  const failedCount = uploadQueue.filter(item => item.status === 'failed').length;
+  const uploadingCount = uploadQueue.filter(item => item.status === 'uploading').length;
+  const pausedCount = uploadQueue.filter(item => item.status === 'paused').length;
+
+  return (
+    <div className={`drag-drop-upload ${className}`}>
+      {!isOnline && (
+        <div className="offline-banner">
+          <WifiOffIcon />
+          <span>You're offline. Uploads will resume when connection is restored.</span>
+        </div>
+      )}
+
+      <div
+        className={`drop-zone ${isDragOver ? 'drop-zone--active' : ''} ${disabled ? 'drop-zone--disabled' : ''}`}
+        onDragEnter={handleDragEnter}
+        onDragLeave={handleDragLeave}
+        onDragOver={handleDragOver}
+        onDrop={handleDrop}
+        onClick={handleClick}
+        role="button"
+        tabIndex={disabled ? -1 : 0}
+        onKeyDown={(e) => e.key === 'Enter' && handleClick()}
+        aria-disabled={disabled}
+        title={disabled ? disabledReason : undefined}
+      >
+        <input
+          ref={fileInputRef}
+          type="file"
+          multiple
+          onChange={handleFileChange}
+          className="drop-zone__input"
+          accept={!allowAllTypes && allowedTypes ? allowedTypes.join(',') : undefined}
+          disabled={disabled}
+        />
+        <div className="drop-zone__content">
+          <UploadIcon />
+          <p className="drop-zone__text">
+            {disabled ? (
+              <span>{disabledReason || 'Upload disabled'}</span>
+            ) : (
+              <><strong>Drag files here</strong> or click to browse</>
+            )}
+          </p>
+          {!disabled && (
+            <p className="drop-zone__hint">
+              {maxFileSize && `Max file size: ${formatBytes(maxFileSize)}`}
+              {!allowAllTypes && allowedTypes && ` • Accepted: ${allowedTypes.join(', ')}`}
+            </p>
+          )}
+        </div>
+      </div>
+
+      {/* Upload Queue */}
+      {uploadQueue.length > 0 && (
+        <div className="upload-queue">
+          <div className="upload-queue__header">
+            <span className="upload-queue__title">
+              {pausedCount > 0 && !isOnline
+                ? `${pausedCount} uploads paused (offline)`
+                : uploadingCount > 0 
+                  ? `Uploading ${uploadingCount} of ${uploadQueue.length} files`
+                  : `${completedCount} of ${uploadQueue.length} files uploaded`
+              }
+              {failedCount > 0 && ` (${failedCount} failed)`}
+            </span>
+            {(completedCount > 0 || failedCount > 0) && (
+              <button 
+                className="upload-queue__clear" 
+                onClick={clearCompleted}
+                type="button"
+              >
+                Clear finished
+              </button>
+            )}
+          </div>
+
+          {/* Overall progress bar */}
+          {uploadingCount > 0 && (
+            <div className="upload-queue__overall">
+              <div className="progress-bar">
+                <div 
+                  className="progress-bar__fill" 
+                  style={{ width: `${overallProgress}%` }}
+                />
+              </div>
+              <span className="progress-bar__text">{overallProgress}%</span>
+            </div>
+          )}
+
+          {/* Individual file items */}
+          <ul className="upload-queue__list">
+            {uploadQueue.map(item => (
+              <li key={item.id} className={`upload-item upload-item--${item.status}`}>
+                <div className="upload-item__icon">
+                  {item.status === 'complete' ? <CheckIcon /> : 
+                   item.status === 'failed' ? <ErrorIcon /> : 
+                   item.status === 'paused' ? <PauseIcon /> :
+                   item.status === 'validating' ? <SpinnerIcon /> :
+                   <FileIcon />}
+                </div>
+                
+                <div className="upload-item__info">
+                  <div className="upload-item__name" title={item.file.name}>
+                    {item.file.name}
+                  </div>
+                  <div className="upload-item__meta">
+                    <span className="upload-item__size">{formatBytes(item.file.size)}</span>
+                    {item.status === 'uploading' && item.speed > 0 && (
+                      <>
+                        <span className="upload-item__speed">{formatSpeed(item.speed)}</span>
+                        {item.startTime && (
+                          <span className="upload-item__eta">
+                            {formatTimeRemaining(
+                              (item.file.size - (item.file.size * item.progress / 100)) / item.speed
+                            )} remaining
+                          </span>
+                        )}
+                      </>
+                    )}
+                    {item.status === 'complete' && item.artifactId && (
+                      <span className="upload-item__artifact">
+                        ID: {item.artifactId.substring(0, 12)}...
+                      </span>
+                    )}
+                    {item.error && (
+                      <span className="upload-item__error">{item.error}</span>
+                    )}
+                    {item.retryCount > 0 && item.status === 'uploading' && (
+                      <span className="upload-item__retry-count">Retry {item.retryCount}</span>
+                    )}
+                    {item.status === 'validating' && (
+                      <span className="upload-item__validating">Computing hash...</span>
+                    )}
+                  </div>
+                  
+                  {item.status === 'uploading' && (
+                    <div className="progress-bar progress-bar--small">
+                      <div 
+                        className="progress-bar__fill" 
+                        style={{ width: `${item.progress}%` }}
+                      />
+                    </div>
+                  )}
+                </div>
+
+                <div className="upload-item__actions">
+                  {(item.status === 'failed' || (item.status === 'paused' && isOnline)) && (
+                    <button 
+                      className="upload-item__btn upload-item__btn--retry"
+                      onClick={() => retryItem(item.id)}
+                      title="Retry upload"
+                      type="button"
+                    >
+                      <RetryIcon />
+                    </button>
+                  )}
+                  {(item.status === 'complete' || item.status === 'failed' || item.status === 'pending' || item.status === 'paused') && (
+                    <button 
+                      className="upload-item__btn upload-item__btn--remove"
+                      onClick={() => removeItem(item.id)}
+                      title="Remove"
+                      type="button"
+                    >
+                      <RemoveIcon />
+                    </button>
+                  )}
+                </div>
+              </li>
+            ))}
+          </ul>
+        </div>
+      )}
+    </div>
+  );
+}

frontend/src/components/Layout.css

@@ -14,7 +14,7 @@
   top: 0;
   z-index: 100;
   backdrop-filter: blur(12px);
-  background: rgba(17, 17, 19, 0.85);
+  background: rgba(37, 37, 41, 0.85);
 }
 
 .header-content {
@@ -98,6 +98,170 @@
   opacity: 0.7;
 }
 
+/* Login link */
+.nav-login {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 16px;
+  color: var(--text-primary);
+  font-size: 0.875rem;
+  font-weight: 500;
+  border-radius: var(--radius-md);
+  transition: all var(--transition-fast);
+  margin-left: 8px;
+  border: 1px solid var(--border-primary);
+}
+
+.nav-login:hover {
+  color: var(--text-primary);
+  background: var(--bg-hover);
+  border-color: var(--border-secondary);
+}
+
+/* User Menu */
+.user-menu {
+  position: relative;
+  margin-left: 8px;
+}
+
+.user-menu-trigger {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 6px 12px;
+  background: transparent;
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  color: var(--text-primary);
+  font-size: 0.875rem;
+  font-weight: 500;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+}
+
+.user-menu-trigger:hover {
+  background: var(--bg-hover);
+  border-color: var(--border-secondary);
+}
+
+.user-avatar {
+  width: 28px;
+  height: 28px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: var(--accent-gradient);
+  border-radius: var(--radius-sm);
+  color: white;
+  font-weight: 600;
+  font-size: 0.8125rem;
+}
+
+.user-name {
+  max-width: 120px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.user-menu-dropdown {
+  position: absolute;
+  top: 100%;
+  right: 0;
+  margin-top: 8px;
+  min-width: 200px;
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  box-shadow: var(--shadow-lg);
+  z-index: 200;
+  overflow: hidden;
+}
+
+.user-menu-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 12px 16px;
+}
+
+.user-menu-username {
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: var(--text-primary);
+}
+
+.user-menu-badge {
+  padding: 2px 8px;
+  background: var(--accent-gradient);
+  border-radius: 100px;
+  font-size: 0.6875rem;
+  font-weight: 600;
+  color: white;
+  text-transform: uppercase;
+  letter-spacing: 0.02em;
+}
+
+.user-menu-divider {
+  height: 1px;
+  background: var(--border-primary);
+}
+
+.user-menu-item {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  width: 100%;
+  padding: 12px 16px;
+  background: transparent;
+  border: none;
+  color: var(--text-secondary);
+  font-size: 0.875rem;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  text-align: left;
+  text-decoration: none;
+}
+
+.user-menu-item:hover {
+  background: var(--bg-hover);
+  color: var(--text-primary);
+}
+
+.user-menu-item svg {
+  opacity: 0.7;
+}
+
+.user-menu-item:hover svg {
+  opacity: 1;
+}
+
+/* User menu loading state */
+.user-menu-loading {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 40px;
+  height: 40px;
+  margin-left: 8px;
+}
+
+.user-menu-spinner {
+  width: 16px;
+  height: 16px;
+  border: 2px solid var(--border-secondary);
+  border-top-color: var(--accent-primary);
+  border-radius: 50%;
+  animation: user-menu-spin 0.6s linear infinite;
+}
+
+@keyframes user-menu-spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
+
 /* Main content */
 .main {
   flex: 1;

frontend/src/components/Layout.tsx

@@ -1,5 +1,6 @@
-import { ReactNode } from 'react';
-import { Link, useLocation } from 'react-router-dom';
+import { ReactNode, useState, useRef, useEffect } from 'react';
+import { Link, NavLink, useLocation, useNavigate } from 'react-router-dom';
+import { useAuth } from '../contexts/AuthContext';
 import { GlobalSearch } from './GlobalSearch';
 import './Layout.css';
 
@@ -9,6 +10,31 @@ interface LayoutProps {
 
 function Layout({ children }: LayoutProps) {
   const location = useLocation();
+  const navigate = useNavigate();
+  const { user, loading, logout } = useAuth();
+  const [showUserMenu, setShowUserMenu] = useState(false);
+  const menuRef = useRef<HTMLDivElement>(null);
+
+  // Close menu when clicking outside
+  useEffect(() => {
+    function handleClickOutside(event: MouseEvent) {
+      if (menuRef.current && !menuRef.current.contains(event.target as Node)) {
+        setShowUserMenu(false);
+      }
+    }
+    document.addEventListener('mousedown', handleClickOutside);
+    return () => document.removeEventListener('mousedown', handleClickOutside);
+  }, []);
+
+  async function handleLogout() {
+    try {
+      await logout();
+      setShowUserMenu(false);
+      navigate('/');
+    } catch {
+      // Error handled in context
+    }
+  }
 
   return (
     <div className="layout">
@@ -60,6 +86,97 @@ function Layout({ children }: LayoutProps) {
               </svg>
               Docs
             </a>
+            
+            {/* User Menu */}
+            {loading ? (
+              <div className="user-menu-loading">
+                <div className="user-menu-spinner"></div>
+              </div>
+            ) : user ? (
+              <div className="user-menu" ref={menuRef}>
+                <button 
+                  className="user-menu-trigger"
+                  onClick={() => setShowUserMenu(!showUserMenu)}
+                  aria-expanded={showUserMenu}
+                  aria-haspopup="true"
+                >
+                  <div className="user-avatar">
+                    {user.username.charAt(0).toUpperCase()}
+                  </div>
+                  <span className="user-name">{user.display_name || user.username}</span>
+                  <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                    <polyline points="6 9 12 15 18 9"/>
+                  </svg>
+                </button>
+                
+                {showUserMenu && (
+                  <div className="user-menu-dropdown">
+                    <div className="user-menu-header">
+                      <span className="user-menu-username">{user.username}</span>
+                      {user.is_admin && (
+                        <span className="user-menu-badge">Admin</span>
+                      )}
+                    </div>
+                    <div className="user-menu-divider"></div>
+                    <NavLink
+                      to="/settings/api-keys"
+                      className="user-menu-item"
+                      onClick={() => setShowUserMenu(false)}
+                    >
+                      <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                        <path d="M21 2l-2 2m-7.61 7.61a5.5 5.5 0 1 1-7.778 7.778 5.5 5.5 0 0 1 7.777-7.777zm0 0L15.5 7.5m0 0l3 3L22 7l-3-3m-3.5 3.5L19 4"/>
+                      </svg>
+                      API Keys
+                    </NavLink>
+                    {user.is_admin && (
+                      <>
+                        <NavLink
+                          to="/admin/users"
+                          className="user-menu-item"
+                          onClick={() => setShowUserMenu(false)}
+                        >
+                          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                            <path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"/>
+                            <circle cx="9" cy="7" r="4"/>
+                            <path d="M23 21v-2a4 4 0 0 0-3-3.87"/>
+                            <path d="M16 3.13a4 4 0 0 1 0 7.75"/>
+                          </svg>
+                          User Management
+                        </NavLink>
+                        <NavLink
+                          to="/admin/oidc"
+                          className="user-menu-item"
+                          onClick={() => setShowUserMenu(false)}
+                        >
+                          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                            <path d="M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z"/>
+                          </svg>
+                          SSO Configuration
+                        </NavLink>
+                      </>
+                    )}
+                    <div className="user-menu-divider"></div>
+                    <button className="user-menu-item" onClick={handleLogout}>
+                      <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                        <path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4"/>
+                        <polyline points="16 17 21 12 16 7"/>
+                        <line x1="21" y1="12" x2="9" y2="12"/>
+                      </svg>
+                      Sign out
+                    </button>
+                  </div>
+                )}
+              </div>
+            ) : (
+              <Link to="/login" className="nav-login">
+                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                  <path d="M15 3h4a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2h-4"/>
+                  <polyline points="10 17 15 12 10 7"/>
+                  <line x1="15" y1="12" x2="3" y2="12"/>
+                </svg>
+                Login
+              </Link>
+            )}
           </nav>
         </div>
       </header>

frontend/src/components/index.ts

@@ -10,3 +10,5 @@ export { FilterChip, FilterChipGroup } from './FilterChip';
 export { DataTable } from './DataTable';
 export { Pagination } from './Pagination';
 export { GlobalSearch } from './GlobalSearch';
+export { DragDropUpload } from './DragDropUpload';
+export type { DragDropUploadProps, UploadItem, UploadResult, UploadStatus } from './DragDropUpload';

frontend/src/contexts/AuthContext.tsx

@@ -0,0 +1,166 @@
+import { createContext, useContext, useState, useEffect, useCallback, useRef, ReactNode } from 'react';
+import { User, AccessLevel } from '../types';
+import { getCurrentUser, login as apiLogin, logout as apiLogout, getMyProjectAccess } from '../api';
+
+interface PermissionCacheEntry {
+  accessLevel: AccessLevel | null;
+  timestamp: number;
+}
+
+interface AuthContextType {
+  user: User | null;
+  loading: boolean;
+  error: string | null;
+  login: (username: string, password: string) => Promise<void>;
+  logout: () => Promise<void>;
+  refreshUser: () => Promise<void>;
+  clearError: () => void;
+  getProjectPermission: (projectName: string) => Promise<AccessLevel | null>;
+  invalidatePermissionCache: (projectName?: string) => void;
+}
+
+const AuthContext = createContext<AuthContextType | undefined>(undefined);
+
+interface AuthProviderProps {
+  children: ReactNode;
+}
+
+// Cache TTL in milliseconds (5 minutes)
+const PERMISSION_CACHE_TTL = 5 * 60 * 1000;
+
+export function AuthProvider({ children }: AuthProviderProps) {
+  const [user, setUser] = useState<User | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const permissionCacheRef = useRef<Map<string, PermissionCacheEntry>>(new Map());
+
+  // Clear permission cache
+  const clearPermissionCache = useCallback(() => {
+    permissionCacheRef.current.clear();
+  }, []);
+
+  // Check session on initial load
+  useEffect(() => {
+    async function checkAuth() {
+      try {
+        const currentUser = await getCurrentUser();
+        setUser(currentUser);
+      } catch {
+        setUser(null);
+      } finally {
+        setLoading(false);
+      }
+    }
+    checkAuth();
+  }, []);
+
+  const login = useCallback(async (username: string, password: string) => {
+    setLoading(true);
+    setError(null);
+    try {
+      const loggedInUser = await apiLogin({ username, password });
+      setUser(loggedInUser);
+      // Clear permission cache on login - permissions may have changed
+      clearPermissionCache();
+    } catch (err) {
+      const message = err instanceof Error ? err.message : 'Login failed';
+      setError(message);
+      throw err;
+    } finally {
+      setLoading(false);
+    }
+  }, [clearPermissionCache]);
+
+  const logout = useCallback(async () => {
+    setLoading(true);
+    setError(null);
+    try {
+      await apiLogout();
+      setUser(null);
+      // Clear permission cache on logout
+      clearPermissionCache();
+    } catch (err) {
+      const message = err instanceof Error ? err.message : 'Logout failed';
+      setError(message);
+      throw err;
+    } finally {
+      setLoading(false);
+    }
+  }, [clearPermissionCache]);
+
+  const clearError = useCallback(() => {
+    setError(null);
+  }, []);
+
+  const refreshUser = useCallback(async () => {
+    try {
+      const currentUser = await getCurrentUser();
+      setUser(currentUser);
+    } catch {
+      setUser(null);
+    }
+  }, []);
+
+  // Get project permission with caching
+  const getProjectPermission = useCallback(async (projectName: string): Promise<AccessLevel | null> => {
+    const cached = permissionCacheRef.current.get(projectName);
+    const now = Date.now();
+
+    // Return cached value if still valid
+    if (cached && (now - cached.timestamp) < PERMISSION_CACHE_TTL) {
+      return cached.accessLevel;
+    }
+
+    // Fetch fresh permission
+    try {
+      const result = await getMyProjectAccess(projectName);
+      const entry: PermissionCacheEntry = {
+        accessLevel: result.access_level,
+        timestamp: now,
+      };
+      permissionCacheRef.current.set(projectName, entry);
+      return result.access_level;
+    } catch {
+      // On error, cache null to avoid repeated failed requests
+      const entry: PermissionCacheEntry = {
+        accessLevel: null,
+        timestamp: now,
+      };
+      permissionCacheRef.current.set(projectName, entry);
+      return null;
+    }
+  }, []);
+
+  // Invalidate permission cache for a specific project or all projects
+  const invalidatePermissionCache = useCallback((projectName?: string) => {
+    if (projectName) {
+      permissionCacheRef.current.delete(projectName);
+    } else {
+      clearPermissionCache();
+    }
+  }, [clearPermissionCache]);
+
+  return (
+    <AuthContext.Provider value={{
+      user,
+      loading,
+      error,
+      login,
+      logout,
+      refreshUser,
+      clearError,
+      getProjectPermission,
+      invalidatePermissionCache,
+    }}>
+      {children}
+    </AuthContext.Provider>
+  );
+}
+
+export function useAuth() {
+  const context = useContext(AuthContext);
+  if (context === undefined) {
+    throw new Error('useAuth must be used within an AuthProvider');
+  }
+  return context;
+}

frontend/src/index.css

@@ -5,12 +5,12 @@
 }
 
 :root {
-  /* Dark mode color palette */
-  --bg-primary: #0a0a0b;
-  --bg-secondary: #111113;
-  --bg-tertiary: #1a1a1d;
-  --bg-elevated: #222225;
-  --bg-hover: #2a2a2e;
+  /* Dark mode color palette - lighter tones for better readability */
+  --bg-primary: #1e1e22;
+  --bg-secondary: #252529;
+  --bg-tertiary: #2d2d32;
+  --bg-elevated: #35353a;
+  --bg-hover: #3d3d42;
 
   /* Accent colors - Green/Emerald theme */
   --accent-primary: #10b981;
@@ -24,9 +24,9 @@
   --text-tertiary: #9ca3af;
   --text-muted: #6b7280;
 
-  /* Border colors */
-  --border-primary: #27272a;
-  --border-secondary: #3f3f46;
+  /* Border colors - slightly more visible */
+  --border-primary: #37373d;
+  --border-secondary: #48484e;
   --border-accent: #10b981;
 
   /* Status colors */

frontend/src/pages/APIKeysPage.css

@@ -0,0 +1,580 @@
+.api-keys-page {
+  max-width: 900px;
+  margin: 0 auto;
+}
+
+.api-keys-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: flex-start;
+  margin-bottom: 32px;
+  gap: 24px;
+}
+
+.api-keys-header-content h1 {
+  font-size: 1.75rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin-bottom: 8px;
+  letter-spacing: -0.02em;
+}
+
+.api-keys-subtitle {
+  color: var(--text-tertiary);
+  font-size: 0.9375rem;
+}
+
+.api-keys-create-button {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 12px 20px;
+  background: var(--accent-gradient);
+  border: none;
+  border-radius: var(--radius-md);
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: white;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  box-shadow: var(--shadow-sm), 0 0 20px rgba(16, 185, 129, 0.2);
+  flex-shrink: 0;
+}
+
+.api-keys-create-button:hover:not(:disabled) {
+  transform: translateY(-1px);
+  box-shadow: var(--shadow-md), 0 0 30px rgba(16, 185, 129, 0.3);
+}
+
+.api-keys-create-button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+  transform: none;
+}
+
+.api-keys-error {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  background: var(--error-bg);
+  border: 1px solid rgba(239, 68, 68, 0.2);
+  color: var(--error);
+  padding: 12px 16px;
+  border-radius: var(--radius-md);
+  margin-bottom: 24px;
+  font-size: 0.875rem;
+}
+
+.api-keys-error svg {
+  flex-shrink: 0;
+}
+
+.api-keys-error span {
+  flex: 1;
+}
+
+.api-keys-error-dismiss {
+  background: transparent;
+  border: none;
+  padding: 4px;
+  color: var(--error);
+  cursor: pointer;
+  opacity: 0.7;
+  transition: opacity var(--transition-fast);
+}
+
+.api-keys-error-dismiss:hover {
+  opacity: 1;
+}
+
+.api-keys-new-key-banner {
+  background: linear-gradient(135deg, rgba(16, 185, 129, 0.12) 0%, rgba(5, 150, 105, 0.08) 100%);
+  border: 1px solid rgba(16, 185, 129, 0.3);
+  border-radius: var(--radius-lg);
+  padding: 24px;
+  margin-bottom: 24px;
+}
+
+.api-keys-new-key-header {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  margin-bottom: 12px;
+  color: var(--accent-primary);
+}
+
+.api-keys-new-key-title {
+  font-size: 1rem;
+  font-weight: 600;
+}
+
+.api-keys-new-key-warning {
+  background: var(--warning-bg);
+  border: 1px solid rgba(245, 158, 11, 0.3);
+  color: var(--warning);
+  padding: 10px 14px;
+  border-radius: var(--radius-md);
+  font-size: 0.8125rem;
+  font-weight: 500;
+  margin-bottom: 16px;
+}
+
+.api-keys-new-key-value-container {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  margin-bottom: 16px;
+}
+
+.api-keys-new-key-value {
+  flex: 1;
+  background: var(--bg-primary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  padding: 14px 16px;
+  font-family: 'JetBrains Mono', 'Fira Code', 'SF Mono', Monaco, monospace;
+  font-size: 0.8125rem;
+  color: var(--text-primary);
+  word-break: break-all;
+  line-height: 1.5;
+}
+
+.api-keys-copy-button {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+  padding: 10px 16px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  color: var(--text-secondary);
+  font-size: 0.8125rem;
+  font-weight: 500;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  flex-shrink: 0;
+}
+
+.api-keys-copy-button:hover {
+  background: var(--bg-hover);
+  border-color: var(--border-secondary);
+  color: var(--text-primary);
+}
+
+.api-keys-done-button {
+  padding: 10px 20px;
+  background: var(--accent-gradient);
+  border: none;
+  border-radius: var(--radius-md);
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: white;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+}
+
+.api-keys-done-button:hover {
+  transform: translateY(-1px);
+  box-shadow: var(--shadow-sm);
+}
+
+.api-keys-create-form-card {
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-lg);
+  padding: 24px;
+  margin-bottom: 24px;
+}
+
+.api-keys-create-form-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 20px;
+}
+
+.api-keys-create-form-header h2 {
+  font-size: 1.125rem;
+  font-weight: 600;
+  color: var(--text-primary);
+}
+
+.api-keys-create-form-close {
+  background: transparent;
+  border: none;
+  padding: 4px;
+  color: var(--text-tertiary);
+  cursor: pointer;
+  border-radius: var(--radius-sm);
+  transition: all var(--transition-fast);
+}
+
+.api-keys-create-form-close:hover {
+  background: var(--bg-hover);
+  color: var(--text-primary);
+}
+
+.api-keys-create-error {
+  background: var(--error-bg);
+  border: 1px solid rgba(239, 68, 68, 0.2);
+  color: var(--error);
+  padding: 10px 14px;
+  border-radius: var(--radius-md);
+  font-size: 0.8125rem;
+  margin-bottom: 16px;
+}
+
+.api-keys-create-form {
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+}
+
+.api-keys-form-group {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.api-keys-form-group label {
+  font-size: 0.8125rem;
+  font-weight: 500;
+  color: var(--text-secondary);
+}
+
+.api-keys-form-group input {
+  padding: 12px 14px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  font-size: 0.875rem;
+  color: var(--text-primary);
+  transition: all var(--transition-fast);
+}
+
+.api-keys-form-group input::placeholder {
+  color: var(--text-muted);
+}
+
+.api-keys-form-group input:hover:not(:disabled) {
+  border-color: var(--border-secondary);
+  background: var(--bg-elevated);
+}
+
+.api-keys-form-group input:focus {
+  outline: none;
+  border-color: var(--accent-primary);
+  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
+  background: var(--bg-elevated);
+}
+
+.api-keys-form-group input:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
+
+.api-keys-form-actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: 12px;
+  margin-top: 8px;
+}
+
+.api-keys-cancel-button {
+  padding: 10px 18px;
+  background: transparent;
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: var(--text-secondary);
+  cursor: pointer;
+  transition: all var(--transition-fast);
+}
+
+.api-keys-cancel-button:hover:not(:disabled) {
+  background: var(--bg-hover);
+  border-color: var(--border-secondary);
+  color: var(--text-primary);
+}
+
+.api-keys-cancel-button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.api-keys-submit-button {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  padding: 10px 18px;
+  background: var(--accent-gradient);
+  border: none;
+  border-radius: var(--radius-md);
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: white;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  min-width: 110px;
+}
+
+.api-keys-submit-button:hover:not(:disabled) {
+  transform: translateY(-1px);
+  box-shadow: var(--shadow-sm), 0 0 20px rgba(16, 185, 129, 0.2);
+}
+
+.api-keys-submit-button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+  transform: none;
+}
+
+.api-keys-button-spinner {
+  width: 14px;
+  height: 14px;
+  border: 2px solid rgba(255, 255, 255, 0.3);
+  border-top-color: white;
+  border-radius: 50%;
+  animation: api-keys-spin 0.6s linear infinite;
+}
+
+@keyframes api-keys-spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+.api-keys-list-container {
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-lg);
+  overflow: hidden;
+}
+
+.api-keys-list-loading,
+.api-keys-loading {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 12px;
+  padding: 64px 24px;
+  color: var(--text-tertiary);
+  font-size: 0.9375rem;
+}
+
+.api-keys-spinner {
+  width: 20px;
+  height: 20px;
+  border: 2px solid var(--border-secondary);
+  border-top-color: var(--accent-primary);
+  border-radius: 50%;
+  animation: api-keys-spin 0.6s linear infinite;
+}
+
+.api-keys-empty {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding: 64px 24px;
+  text-align: center;
+}
+
+.api-keys-empty-icon {
+  color: var(--text-muted);
+  margin-bottom: 16px;
+  opacity: 0.5;
+}
+
+.api-keys-empty h3 {
+  font-size: 1.125rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin-bottom: 8px;
+}
+
+.api-keys-empty p {
+  color: var(--text-tertiary);
+  font-size: 0.875rem;
+}
+
+.api-keys-list {
+  display: flex;
+  flex-direction: column;
+}
+
+.api-keys-list-header {
+  display: grid;
+  grid-template-columns: 1fr 160px 160px 140px;
+  gap: 16px;
+  padding: 14px 20px;
+  background: var(--bg-tertiary);
+  border-bottom: 1px solid var(--border-primary);
+  font-size: 0.75rem;
+  font-weight: 600;
+  color: var(--text-tertiary);
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+
+.api-keys-list-item {
+  display: grid;
+  grid-template-columns: 1fr 160px 160px 140px;
+  gap: 16px;
+  padding: 16px 20px;
+  align-items: center;
+  border-bottom: 1px solid var(--border-primary);
+  transition: background var(--transition-fast);
+}
+
+.api-keys-list-item:last-child {
+  border-bottom: none;
+}
+
+.api-keys-list-item:hover {
+  background: var(--bg-tertiary);
+}
+
+.api-keys-item-name {
+  font-weight: 500;
+  color: var(--text-primary);
+  font-size: 0.9375rem;
+}
+
+.api-keys-item-description {
+  color: var(--text-tertiary);
+  font-size: 0.8125rem;
+  margin-top: 4px;
+}
+
+.api-keys-col-created,
+.api-keys-col-used {
+  color: var(--text-secondary);
+  font-size: 0.8125rem;
+}
+
+.api-keys-col-actions {
+  display: flex;
+  justify-content: flex-end;
+}
+
+.api-keys-revoke-button {
+  padding: 6px 14px;
+  background: transparent;
+  border: 1px solid rgba(239, 68, 68, 0.3);
+  border-radius: var(--radius-md);
+  font-size: 0.8125rem;
+  font-weight: 500;
+  color: var(--error);
+  cursor: pointer;
+  transition: all var(--transition-fast);
+}
+
+.api-keys-revoke-button:hover {
+  background: var(--error-bg);
+  border-color: rgba(239, 68, 68, 0.5);
+}
+
+.api-keys-delete-confirm {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-size: 0.8125rem;
+  color: var(--text-secondary);
+}
+
+.api-keys-confirm-yes {
+  padding: 4px 12px;
+  background: var(--error);
+  border: none;
+  border-radius: var(--radius-sm);
+  font-size: 0.75rem;
+  font-weight: 500;
+  color: white;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+}
+
+.api-keys-confirm-yes:hover:not(:disabled) {
+  opacity: 0.9;
+}
+
+.api-keys-confirm-yes:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.api-keys-confirm-no {
+  padding: 4px 12px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-sm);
+  font-size: 0.75rem;
+  font-weight: 500;
+  color: var(--text-secondary);
+  cursor: pointer;
+  transition: all var(--transition-fast);
+}
+
+.api-keys-confirm-no:hover:not(:disabled) {
+  background: var(--bg-hover);
+}
+
+.api-keys-confirm-no:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+@media (max-width: 768px) {
+  .api-keys-header {
+    flex-direction: column;
+    align-items: stretch;
+  }
+
+  .api-keys-create-button {
+    align-self: flex-start;
+  }
+
+  .api-keys-list-header {
+    display: none;
+  }
+
+  .api-keys-list-item {
+    grid-template-columns: 1fr;
+    gap: 8px;
+  }
+
+  .api-keys-col-name {
+    order: 1;
+  }
+
+  .api-keys-col-created,
+  .api-keys-col-used {
+    font-size: 0.75rem;
+  }
+
+  .api-keys-col-created::before {
+    content: 'Created: ';
+    color: var(--text-muted);
+  }
+
+  .api-keys-col-used::before {
+    content: 'Last used: ';
+    color: var(--text-muted);
+  }
+
+  .api-keys-col-actions {
+    justify-content: flex-start;
+    margin-top: 8px;
+  }
+
+  .api-keys-new-key-value-container {
+    flex-direction: column;
+  }
+
+  .api-keys-copy-button {
+    align-self: flex-start;
+  }
+}

frontend/src/pages/APIKeysPage.tsx

@@ -0,0 +1,371 @@
+import { useState, useEffect } from 'react';
+import { useNavigate } from 'react-router-dom';
+import { useAuth } from '../contexts/AuthContext';
+import { listAPIKeys, createAPIKey, deleteAPIKey } from '../api';
+import { APIKey, APIKeyCreateResponse } from '../types';
+import './APIKeysPage.css';
+
+function APIKeysPage() {
+  const { user, loading: authLoading } = useAuth();
+  const navigate = useNavigate();
+
+  const [keys, setKeys] = useState<APIKey[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+
+  const [showCreateForm, setShowCreateForm] = useState(false);
+  const [createName, setCreateName] = useState('');
+  const [createDescription, setCreateDescription] = useState('');
+  const [isCreating, setIsCreating] = useState(false);
+  const [createError, setCreateError] = useState<string | null>(null);
+
+  const [newlyCreatedKey, setNewlyCreatedKey] = useState<APIKeyCreateResponse | null>(null);
+  const [copied, setCopied] = useState(false);
+
+  const [deleteConfirmId, setDeleteConfirmId] = useState<string | null>(null);
+  const [isDeleting, setIsDeleting] = useState(false);
+
+  useEffect(() => {
+    if (!authLoading && !user) {
+      navigate('/login', { state: { from: '/settings/api-keys' } });
+    }
+  }, [user, authLoading, navigate]);
+
+  useEffect(() => {
+    if (user) {
+      loadKeys();
+    }
+  }, [user]);
+
+  async function loadKeys() {
+    setLoading(true);
+    setError(null);
+    try {
+      const data = await listAPIKeys();
+      setKeys(data);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to load API keys');
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  async function handleCreate(e: React.FormEvent) {
+    e.preventDefault();
+    if (!createName.trim()) {
+      setCreateError('Name is required');
+      return;
+    }
+
+    setIsCreating(true);
+    setCreateError(null);
+    try {
+      const response = await createAPIKey({
+        name: createName.trim(),
+        description: createDescription.trim() || undefined,
+      });
+      setNewlyCreatedKey(response);
+      setShowCreateForm(false);
+      setCreateName('');
+      setCreateDescription('');
+      await loadKeys();
+    } catch (err) {
+      setCreateError(err instanceof Error ? err.message : 'Failed to create API key');
+    } finally {
+      setIsCreating(false);
+    }
+  }
+
+  async function handleDelete(id: string) {
+    setIsDeleting(true);
+    try {
+      await deleteAPIKey(id);
+      setDeleteConfirmId(null);
+      await loadKeys();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to revoke API key');
+    } finally {
+      setIsDeleting(false);
+    }
+  }
+
+  async function handleCopyKey() {
+    if (newlyCreatedKey) {
+      try {
+        await navigator.clipboard.writeText(newlyCreatedKey.key);
+        setCopied(true);
+        setTimeout(() => setCopied(false), 2000);
+      } catch {
+        setError('Failed to copy to clipboard');
+      }
+    }
+  }
+
+  function handleDismissNewKey() {
+    setNewlyCreatedKey(null);
+    setCopied(false);
+  }
+
+  function formatDate(dateString: string | null): string {
+    if (!dateString) return 'Never';
+    return new Date(dateString).toLocaleDateString('en-US', {
+      year: 'numeric',
+      month: 'short',
+      day: 'numeric',
+      hour: '2-digit',
+      minute: '2-digit',
+    });
+  }
+
+  if (authLoading) {
+    return (
+      <div className="api-keys-page">
+        <div className="api-keys-loading">
+          <div className="api-keys-spinner"></div>
+          <span>Loading...</span>
+        </div>
+      </div>
+    );
+  }
+
+  if (!user) {
+    return null;
+  }
+
+  return (
+    <div className="api-keys-page">
+      <div className="api-keys-header">
+        <div className="api-keys-header-content">
+          <h1>API Keys</h1>
+          <p className="api-keys-subtitle">
+            Manage API keys for programmatic access to Orchard
+          </p>
+        </div>
+        <button
+          className="api-keys-create-button"
+          onClick={() => setShowCreateForm(true)}
+          disabled={showCreateForm}
+        >
+          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+            <line x1="12" y1="5" x2="12" y2="19"/>
+            <line x1="5" y1="12" x2="19" y2="12"/>
+          </svg>
+          Create New Key
+        </button>
+      </div>
+
+      {error && (
+        <div className="api-keys-error">
+          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+            <circle cx="12" cy="12" r="10"/>
+            <line x1="12" y1="8" x2="12" y2="12"/>
+            <line x1="12" y1="16" x2="12.01" y2="16"/>
+          </svg>
+          <span>{error}</span>
+          <button onClick={() => setError(null)} className="api-keys-error-dismiss">
+            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+              <line x1="18" y1="6" x2="6" y2="18"/>
+              <line x1="6" y1="6" x2="18" y2="18"/>
+            </svg>
+          </button>
+        </div>
+      )}
+
+      {newlyCreatedKey && (
+        <div className="api-keys-new-key-banner">
+          <div className="api-keys-new-key-header">
+            <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+              <path d="M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z"/>
+            </svg>
+            <span className="api-keys-new-key-title">New API Key Created</span>
+          </div>
+          <div className="api-keys-new-key-warning">
+            Copy this key now! It won't be shown again.
+          </div>
+          <div className="api-keys-new-key-value-container">
+            <code className="api-keys-new-key-value">{newlyCreatedKey.key}</code>
+            <button
+              className="api-keys-copy-button"
+              onClick={handleCopyKey}
+              title="Copy to clipboard"
+            >
+              {copied ? (
+                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                  <polyline points="20 6 9 17 4 12"/>
+                </svg>
+              ) : (
+                <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                  <rect x="9" y="9" width="13" height="13" rx="2" ry="2"/>
+                  <path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"/>
+                </svg>
+              )}
+              {copied ? 'Copied!' : 'Copy'}
+            </button>
+          </div>
+          <button className="api-keys-done-button" onClick={handleDismissNewKey}>
+            Done
+          </button>
+        </div>
+      )}
+
+      {showCreateForm && (
+        <div className="api-keys-create-form-card">
+          <div className="api-keys-create-form-header">
+            <h2>Create New API Key</h2>
+            <button
+              className="api-keys-create-form-close"
+              onClick={() => {
+                setShowCreateForm(false);
+                setCreateName('');
+                setCreateDescription('');
+                setCreateError(null);
+              }}
+            >
+              <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                <line x1="18" y1="6" x2="6" y2="18"/>
+                <line x1="6" y1="6" x2="18" y2="18"/>
+              </svg>
+            </button>
+          </div>
+
+          {createError && (
+            <div className="api-keys-create-error">
+              {createError}
+            </div>
+          )}
+
+          <form onSubmit={handleCreate} className="api-keys-create-form">
+            <div className="api-keys-form-group">
+              <label htmlFor="key-name">Name</label>
+              <input
+                id="key-name"
+                type="text"
+                value={createName}
+                onChange={(e) => setCreateName(e.target.value)}
+                placeholder="e.g., CI/CD Pipeline, Local Development"
+                autoFocus
+                disabled={isCreating}
+              />
+            </div>
+
+            <div className="api-keys-form-group">
+              <label htmlFor="key-description">Description (optional)</label>
+              <input
+                id="key-description"
+                type="text"
+                value={createDescription}
+                onChange={(e) => setCreateDescription(e.target.value)}
+                placeholder="What will this key be used for?"
+                disabled={isCreating}
+              />
+            </div>
+
+            <div className="api-keys-form-actions">
+              <button
+                type="button"
+                className="api-keys-cancel-button"
+                onClick={() => {
+                  setShowCreateForm(false);
+                  setCreateName('');
+                  setCreateDescription('');
+                  setCreateError(null);
+                }}
+                disabled={isCreating}
+              >
+                Cancel
+              </button>
+              <button
+                type="submit"
+                className="api-keys-submit-button"
+                disabled={isCreating || !createName.trim()}
+              >
+                {isCreating ? (
+                  <>
+                    <span className="api-keys-button-spinner"></span>
+                    Creating...
+                  </>
+                ) : (
+                  'Create Key'
+                )}
+              </button>
+            </div>
+          </form>
+        </div>
+      )}
+
+      <div className="api-keys-list-container">
+        {loading ? (
+          <div className="api-keys-list-loading">
+            <div className="api-keys-spinner"></div>
+            <span>Loading API keys...</span>
+          </div>
+        ) : keys.length === 0 ? (
+          <div className="api-keys-empty">
+            <div className="api-keys-empty-icon">
+              <svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.5">
+                <path d="M21 2l-2 2m-7.61 7.61a5.5 5.5 0 1 1-7.778 7.778 5.5 5.5 0 0 1 7.777-7.777zm0 0L15.5 7.5m0 0l3 3L22 7l-3-3m-3.5 3.5L19 4"/>
+              </svg>
+            </div>
+            <h3>No API Keys</h3>
+            <p>Create an API key to access Orchard programmatically</p>
+          </div>
+        ) : (
+          <div className="api-keys-list">
+            <div className="api-keys-list-header">
+              <span className="api-keys-col-name">Name</span>
+              <span className="api-keys-col-created">Created</span>
+              <span className="api-keys-col-used">Last Used</span>
+              <span className="api-keys-col-actions">Actions</span>
+            </div>
+            {keys.map((key) => (
+              <div key={key.id} className="api-keys-list-item">
+                <div className="api-keys-col-name">
+                  <div className="api-keys-item-name">{key.name}</div>
+                  {key.description && (
+                    <div className="api-keys-item-description">{key.description}</div>
+                  )}
+                </div>
+                <div className="api-keys-col-created">
+                  {formatDate(key.created_at)}
+                </div>
+                <div className="api-keys-col-used">
+                  {formatDate(key.last_used)}
+                </div>
+                <div className="api-keys-col-actions">
+                  {deleteConfirmId === key.id ? (
+                    <div className="api-keys-delete-confirm">
+                      <span>Revoke?</span>
+                      <button
+                        className="api-keys-confirm-yes"
+                        onClick={() => handleDelete(key.id)}
+                        disabled={isDeleting}
+                      >
+                        {isDeleting ? 'Revoking...' : 'Yes'}
+                      </button>
+                      <button
+                        className="api-keys-confirm-no"
+                        onClick={() => setDeleteConfirmId(null)}
+                        disabled={isDeleting}
+                      >
+                        No
+                      </button>
+                    </div>
+                  ) : (
+                    <button
+                      className="api-keys-revoke-button"
+                      onClick={() => setDeleteConfirmId(key.id)}
+                    >
+                      Revoke
+                    </button>
+                  )}
+                </div>
+              </div>
+            ))}
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}
+
+export default APIKeysPage;

frontend/src/pages/AdminOIDCPage.css

@@ -0,0 +1,405 @@
+.admin-oidc-page {
+  max-width: 800px;
+  margin: 0 auto;
+}
+
+.admin-oidc-header {
+  margin-bottom: 32px;
+}
+
+.admin-oidc-header-content h1 {
+  font-size: 1.75rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin-bottom: 8px;
+  letter-spacing: -0.02em;
+}
+
+.admin-oidc-subtitle {
+  color: var(--text-tertiary);
+  font-size: 0.9375rem;
+}
+
+.admin-oidc-success {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  background: var(--success-bg);
+  border: 1px solid rgba(34, 197, 94, 0.2);
+  color: var(--success);
+  padding: 12px 16px;
+  border-radius: var(--radius-md);
+  margin-bottom: 24px;
+  font-size: 0.875rem;
+  animation: admin-oidc-fade-in 0.2s ease;
+}
+
+@keyframes admin-oidc-fade-in {
+  from {
+    opacity: 0;
+    transform: translateY(-8px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.admin-oidc-error {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  background: var(--error-bg);
+  border: 1px solid rgba(239, 68, 68, 0.2);
+  color: var(--error);
+  padding: 12px 16px;
+  border-radius: var(--radius-md);
+  margin-bottom: 24px;
+  font-size: 0.875rem;
+}
+
+.admin-oidc-error svg {
+  flex-shrink: 0;
+}
+
+.admin-oidc-error span {
+  flex: 1;
+}
+
+.admin-oidc-error-dismiss {
+  background: transparent;
+  border: none;
+  padding: 4px;
+  color: var(--error);
+  cursor: pointer;
+  opacity: 0.7;
+  transition: opacity var(--transition-fast);
+}
+
+.admin-oidc-error-dismiss:hover {
+  opacity: 1;
+}
+
+.admin-oidc-access-denied {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding: 80px 24px;
+  text-align: center;
+}
+
+.admin-oidc-access-denied-icon {
+  color: var(--error);
+  margin-bottom: 24px;
+  opacity: 0.8;
+}
+
+.admin-oidc-access-denied h2 {
+  font-size: 1.5rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin-bottom: 12px;
+}
+
+.admin-oidc-access-denied p {
+  color: var(--text-tertiary);
+  font-size: 0.9375rem;
+  max-width: 400px;
+}
+
+.admin-oidc-card {
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-lg);
+  padding: 24px;
+  margin-bottom: 24px;
+}
+
+.admin-oidc-section {
+  margin-bottom: 32px;
+  padding-bottom: 24px;
+  border-bottom: 1px solid var(--border-primary);
+}
+
+.admin-oidc-section:last-of-type {
+  margin-bottom: 0;
+  padding-bottom: 0;
+  border-bottom: none;
+}
+
+.admin-oidc-section h2 {
+  font-size: 1rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin-bottom: 16px;
+}
+
+.admin-oidc-form-group {
+  margin-bottom: 16px;
+}
+
+.admin-oidc-form-group:last-child {
+  margin-bottom: 0;
+}
+
+.admin-oidc-form-group label {
+  display: block;
+  font-size: 0.8125rem;
+  font-weight: 500;
+  color: var(--text-secondary);
+  margin-bottom: 6px;
+}
+
+.admin-oidc-form-group input[type="text"],
+.admin-oidc-form-group input[type="password"],
+.admin-oidc-form-group input[type="url"] {
+  width: 100%;
+  padding: 12px 14px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  font-size: 0.875rem;
+  color: var(--text-primary);
+  transition: all var(--transition-fast);
+}
+
+.admin-oidc-form-group input::placeholder {
+  color: var(--text-muted);
+}
+
+.admin-oidc-form-group input:hover:not(:disabled) {
+  border-color: var(--border-secondary);
+  background: var(--bg-elevated);
+}
+
+.admin-oidc-form-group input:focus {
+  outline: none;
+  border-color: var(--accent-primary);
+  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
+  background: var(--bg-elevated);
+}
+
+.admin-oidc-form-group input:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
+
+.admin-oidc-form-row {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 16px;
+}
+
+.admin-oidc-field-help {
+  margin-top: 6px;
+  font-size: 0.75rem;
+  color: var(--text-muted);
+  line-height: 1.4;
+}
+
+.admin-oidc-field-help code {
+  background: var(--bg-tertiary);
+  padding: 1px 4px;
+  border-radius: 3px;
+  font-size: 0.6875rem;
+}
+
+.admin-oidc-secret-status {
+  color: var(--success);
+  font-weight: 400;
+  font-size: 0.75rem;
+}
+
+.admin-oidc-toggle-group {
+  margin-bottom: 16px;
+}
+
+.admin-oidc-toggle-label {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  cursor: pointer;
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: var(--text-primary);
+  user-select: none;
+}
+
+.admin-oidc-toggle-label input[type="checkbox"] {
+  position: absolute;
+  opacity: 0;
+  width: 0;
+  height: 0;
+}
+
+.admin-oidc-toggle-custom {
+  width: 44px;
+  height: 24px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-secondary);
+  border-radius: 12px;
+  transition: all var(--transition-fast);
+  position: relative;
+  flex-shrink: 0;
+}
+
+.admin-oidc-toggle-custom::after {
+  content: '';
+  position: absolute;
+  left: 2px;
+  top: 2px;
+  width: 18px;
+  height: 18px;
+  background: var(--text-muted);
+  border-radius: 50%;
+  transition: all var(--transition-fast);
+}
+
+.admin-oidc-toggle-label input[type="checkbox"]:checked + .admin-oidc-toggle-custom {
+  background: var(--accent-primary);
+  border-color: var(--accent-primary);
+}
+
+.admin-oidc-toggle-label input[type="checkbox"]:checked + .admin-oidc-toggle-custom::after {
+  left: 22px;
+  background: white;
+}
+
+.admin-oidc-toggle-label input[type="checkbox"]:focus + .admin-oidc-toggle-custom {
+  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
+}
+
+.admin-oidc-toggle-label:hover .admin-oidc-toggle-custom {
+  border-color: var(--accent-primary);
+}
+
+.admin-oidc-form-actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: 12px;
+  margin-top: 24px;
+  padding-top: 24px;
+  border-top: 1px solid var(--border-primary);
+}
+
+.admin-oidc-cancel-button {
+  padding: 10px 18px;
+  background: transparent;
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: var(--text-secondary);
+  cursor: pointer;
+  transition: all var(--transition-fast);
+}
+
+.admin-oidc-cancel-button:hover:not(:disabled) {
+  background: var(--bg-hover);
+  border-color: var(--border-secondary);
+  color: var(--text-primary);
+}
+
+.admin-oidc-cancel-button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.admin-oidc-submit-button {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  padding: 10px 18px;
+  background: var(--accent-gradient);
+  border: none;
+  border-radius: var(--radius-md);
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: white;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  min-width: 160px;
+}
+
+.admin-oidc-submit-button:hover:not(:disabled) {
+  transform: translateY(-1px);
+  box-shadow: var(--shadow-sm), 0 0 20px rgba(16, 185, 129, 0.2);
+}
+
+.admin-oidc-submit-button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+  transform: none;
+}
+
+.admin-oidc-button-spinner {
+  width: 14px;
+  height: 14px;
+  border: 2px solid rgba(255, 255, 255, 0.3);
+  border-top-color: white;
+  border-radius: 50%;
+  animation: admin-oidc-spin 0.6s linear infinite;
+}
+
+@keyframes admin-oidc-spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+.admin-oidc-loading {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 12px;
+  padding: 64px 24px;
+  color: var(--text-tertiary);
+  font-size: 0.9375rem;
+}
+
+.admin-oidc-spinner {
+  width: 20px;
+  height: 20px;
+  border: 2px solid var(--border-secondary);
+  border-top-color: var(--accent-primary);
+  border-radius: 50%;
+  animation: admin-oidc-spin 0.6s linear infinite;
+}
+
+.admin-oidc-info-card {
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-lg);
+  padding: 20px 24px;
+}
+
+.admin-oidc-info-card h3 {
+  font-size: 0.875rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin-bottom: 8px;
+}
+
+.admin-oidc-info-card p {
+  font-size: 0.8125rem;
+  color: var(--text-tertiary);
+  margin-bottom: 12px;
+}
+
+.admin-oidc-callback-url {
+  display: block;
+  background: var(--bg-tertiary);
+  padding: 12px 16px;
+  border-radius: var(--radius-md);
+  font-size: 0.8125rem;
+  color: var(--text-primary);
+  word-break: break-all;
+}
+
+@media (max-width: 640px) {
+  .admin-oidc-form-row {
+    grid-template-columns: 1fr;
+  }
+}

frontend/src/pages/AdminOIDCPage.tsx

@@ -0,0 +1,342 @@
+import { useState, useEffect } from 'react';
+import { useNavigate } from 'react-router-dom';
+import { useAuth } from '../contexts/AuthContext';
+import { getOIDCConfig, updateOIDCConfig } from '../api';
+import { OIDCConfig } from '../types';
+import './AdminOIDCPage.css';
+
+function AdminOIDCPage() {
+  const { user, loading: authLoading } = useAuth();
+  const navigate = useNavigate();
+
+  const [config, setConfig] = useState<OIDCConfig | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [successMessage, setSuccessMessage] = useState<string | null>(null);
+
+  // Form state
+  const [enabled, setEnabled] = useState(false);
+  const [issuerUrl, setIssuerUrl] = useState('');
+  const [clientId, setClientId] = useState('');
+  const [clientSecret, setClientSecret] = useState('');
+  const [scopes, setScopes] = useState('openid profile email');
+  const [autoCreateUsers, setAutoCreateUsers] = useState(true);
+  const [adminGroup, setAdminGroup] = useState('');
+  const [isSaving, setIsSaving] = useState(false);
+
+  useEffect(() => {
+    if (!authLoading && !user) {
+      navigate('/login', { state: { from: '/admin/oidc' } });
+    }
+  }, [user, authLoading, navigate]);
+
+  useEffect(() => {
+    if (user && user.is_admin) {
+      loadConfig();
+    }
+  }, [user]);
+
+  useEffect(() => {
+    if (successMessage) {
+      const timer = setTimeout(() => setSuccessMessage(null), 3000);
+      return () => clearTimeout(timer);
+    }
+  }, [successMessage]);
+
+  async function loadConfig() {
+    setLoading(true);
+    setError(null);
+    try {
+      const data = await getOIDCConfig();
+      setConfig(data);
+      setEnabled(data.enabled);
+      setIssuerUrl(data.issuer_url);
+      setClientId(data.client_id);
+      setScopes(data.scopes.join(' '));
+      setAutoCreateUsers(data.auto_create_users);
+      setAdminGroup(data.admin_group);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to load OIDC configuration');
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  async function handleSave(e: React.FormEvent) {
+    e.preventDefault();
+
+    if (enabled && !issuerUrl.trim()) {
+      setError('Issuer URL is required when OIDC is enabled');
+      return;
+    }
+    if (enabled && !clientId.trim()) {
+      setError('Client ID is required when OIDC is enabled');
+      return;
+    }
+
+    setIsSaving(true);
+    setError(null);
+
+    try {
+      const scopesList = scopes.split(/\s+/).filter(s => s.length > 0);
+      const updateData: Record<string, unknown> = {
+        enabled,
+        issuer_url: issuerUrl.trim(),
+        client_id: clientId.trim(),
+        scopes: scopesList,
+        auto_create_users: autoCreateUsers,
+        admin_group: adminGroup.trim(),
+      };
+
+      if (clientSecret) {
+        updateData.client_secret = clientSecret;
+      }
+
+      await updateOIDCConfig(updateData);
+      setSuccessMessage('OIDC configuration saved successfully');
+      setClientSecret('');
+      await loadConfig();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to save OIDC configuration');
+    } finally {
+      setIsSaving(false);
+    }
+  }
+
+  if (authLoading) {
+    return (
+      <div className="admin-oidc-page">
+        <div className="admin-oidc-loading">
+          <div className="admin-oidc-spinner"></div>
+          <span>Loading...</span>
+        </div>
+      </div>
+    );
+  }
+
+  if (!user) {
+    return null;
+  }
+
+  if (!user.is_admin) {
+    return (
+      <div className="admin-oidc-page">
+        <div className="admin-oidc-access-denied">
+          <div className="admin-oidc-access-denied-icon">
+            <svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.5">
+              <circle cx="12" cy="12" r="10"/>
+              <line x1="4.93" y1="4.93" x2="19.07" y2="19.07"/>
+            </svg>
+          </div>
+          <h2>Access Denied</h2>
+          <p>You do not have permission to access this page. Admin privileges are required.</p>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="admin-oidc-page">
+      <div className="admin-oidc-header">
+        <div className="admin-oidc-header-content">
+          <h1>Single Sign-On (OIDC)</h1>
+          <p className="admin-oidc-subtitle">
+            Configure OpenID Connect for SSO authentication
+          </p>
+        </div>
+      </div>
+
+      {successMessage && (
+        <div className="admin-oidc-success">
+          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+            <path d="M22 11.08V12a10 10 0 1 1-5.93-9.14"/>
+            <polyline points="22 4 12 14.01 9 11.01"/>
+          </svg>
+          <span>{successMessage}</span>
+        </div>
+      )}
+
+      {error && (
+        <div className="admin-oidc-error">
+          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+            <circle cx="12" cy="12" r="10"/>
+            <line x1="12" y1="8" x2="12" y2="12"/>
+            <line x1="12" y1="16" x2="12.01" y2="16"/>
+          </svg>
+          <span>{error}</span>
+          <button onClick={() => setError(null)} className="admin-oidc-error-dismiss">
+            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+              <line x1="18" y1="6" x2="6" y2="18"/>
+              <line x1="6" y1="6" x2="18" y2="18"/>
+            </svg>
+          </button>
+        </div>
+      )}
+
+      {loading ? (
+        <div className="admin-oidc-card">
+          <div className="admin-oidc-loading">
+            <div className="admin-oidc-spinner"></div>
+            <span>Loading configuration...</span>
+          </div>
+        </div>
+      ) : (
+        <form onSubmit={handleSave} className="admin-oidc-card">
+          <div className="admin-oidc-section">
+            <h2>Status</h2>
+            <div className="admin-oidc-toggle-group">
+              <label className="admin-oidc-toggle-label">
+                <input
+                  type="checkbox"
+                  checked={enabled}
+                  onChange={(e) => setEnabled(e.target.checked)}
+                  disabled={isSaving}
+                />
+                <span className="admin-oidc-toggle-custom"></span>
+                Enable OIDC Authentication
+              </label>
+              <p className="admin-oidc-field-help">
+                When enabled, users can sign in using your organization's identity provider.
+              </p>
+            </div>
+          </div>
+
+          <div className="admin-oidc-section">
+            <h2>Provider Configuration</h2>
+
+            <div className="admin-oidc-form-group">
+              <label htmlFor="issuer-url">Issuer URL</label>
+              <input
+                id="issuer-url"
+                type="url"
+                value={issuerUrl}
+                onChange={(e) => setIssuerUrl(e.target.value)}
+                placeholder="https://your-provider.com"
+                disabled={isSaving}
+              />
+              <p className="admin-oidc-field-help">
+                The base URL of your OIDC provider. Discovery document will be fetched from <code>/.well-known/openid-configuration</code>.
+              </p>
+            </div>
+
+            <div className="admin-oidc-form-row">
+              <div className="admin-oidc-form-group">
+                <label htmlFor="client-id">Client ID</label>
+                <input
+                  id="client-id"
+                  type="text"
+                  value={clientId}
+                  onChange={(e) => setClientId(e.target.value)}
+                  placeholder="your-client-id"
+                  disabled={isSaving}
+                />
+              </div>
+
+              <div className="admin-oidc-form-group">
+                <label htmlFor="client-secret">
+                  Client Secret
+                  {config?.has_client_secret && (
+                    <span className="admin-oidc-secret-status"> (configured)</span>
+                  )}
+                </label>
+                <input
+                  id="client-secret"
+                  type="password"
+                  value={clientSecret}
+                  onChange={(e) => setClientSecret(e.target.value)}
+                  placeholder={config?.has_client_secret ? 'Leave blank to keep current' : 'Enter client secret'}
+                  disabled={isSaving}
+                />
+              </div>
+            </div>
+
+            <div className="admin-oidc-form-group">
+              <label htmlFor="scopes">Scopes</label>
+              <input
+                id="scopes"
+                type="text"
+                value={scopes}
+                onChange={(e) => setScopes(e.target.value)}
+                placeholder="openid profile email"
+                disabled={isSaving}
+              />
+              <p className="admin-oidc-field-help">
+                Space-separated list of OIDC scopes to request. Common scopes: openid, profile, email, groups.
+              </p>
+            </div>
+          </div>
+
+          <div className="admin-oidc-section">
+            <h2>User Provisioning</h2>
+
+            <div className="admin-oidc-toggle-group">
+              <label className="admin-oidc-toggle-label">
+                <input
+                  type="checkbox"
+                  checked={autoCreateUsers}
+                  onChange={(e) => setAutoCreateUsers(e.target.checked)}
+                  disabled={isSaving}
+                />
+                <span className="admin-oidc-toggle-custom"></span>
+                Auto-create users on first login
+              </label>
+              <p className="admin-oidc-field-help">
+                When enabled, new users will be created automatically when they sign in via OIDC for the first time.
+              </p>
+            </div>
+
+            <div className="admin-oidc-form-group">
+              <label htmlFor="admin-group">Admin Group (optional)</label>
+              <input
+                id="admin-group"
+                type="text"
+                value={adminGroup}
+                onChange={(e) => setAdminGroup(e.target.value)}
+                placeholder="admin, orchard-admins"
+                disabled={isSaving}
+              />
+              <p className="admin-oidc-field-help">
+                Users in this group (from the groups claim) will be granted admin privileges. Leave blank to disable automatic admin assignment.
+              </p>
+            </div>
+          </div>
+
+          <div className="admin-oidc-form-actions">
+            <button
+              type="button"
+              className="admin-oidc-cancel-button"
+              onClick={loadConfig}
+              disabled={isSaving}
+            >
+              Reset
+            </button>
+            <button
+              type="submit"
+              className="admin-oidc-submit-button"
+              disabled={isSaving}
+            >
+              {isSaving ? (
+                <>
+                  <span className="admin-oidc-button-spinner"></span>
+                  Saving...
+                </>
+              ) : (
+                'Save Configuration'
+              )}
+            </button>
+          </div>
+        </form>
+      )}
+
+      <div className="admin-oidc-info-card">
+        <h3>Callback URL</h3>
+        <p>Configure your identity provider with the following callback URL:</p>
+        <code className="admin-oidc-callback-url">
+          {window.location.origin}/api/v1/auth/oidc/callback
+        </code>
+      </div>
+    </div>
+  );
+}
+
+export default AdminOIDCPage;

frontend/src/pages/AdminUsersPage.css

@@ -0,0 +1,667 @@
+.admin-users-page {
+  max-width: 1100px;
+  margin: 0 auto;
+}
+
+.admin-users-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: flex-start;
+  margin-bottom: 32px;
+  gap: 24px;
+}
+
+.admin-users-header-content h1 {
+  font-size: 1.75rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin-bottom: 8px;
+  letter-spacing: -0.02em;
+}
+
+.admin-users-subtitle {
+  color: var(--text-tertiary);
+  font-size: 0.9375rem;
+}
+
+.admin-users-create-button {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 12px 20px;
+  background: var(--accent-gradient);
+  border: none;
+  border-radius: var(--radius-md);
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: white;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  box-shadow: var(--shadow-sm), 0 0 20px rgba(16, 185, 129, 0.2);
+  flex-shrink: 0;
+}
+
+.admin-users-create-button:hover:not(:disabled) {
+  transform: translateY(-1px);
+  box-shadow: var(--shadow-md), 0 0 30px rgba(16, 185, 129, 0.3);
+}
+
+.admin-users-create-button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+  transform: none;
+}
+
+.admin-users-success {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  background: var(--success-bg);
+  border: 1px solid rgba(34, 197, 94, 0.2);
+  color: var(--success);
+  padding: 12px 16px;
+  border-radius: var(--radius-md);
+  margin-bottom: 24px;
+  font-size: 0.875rem;
+  animation: admin-users-fade-in 0.2s ease;
+}
+
+@keyframes admin-users-fade-in {
+  from {
+    opacity: 0;
+    transform: translateY(-8px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.admin-users-error {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  background: var(--error-bg);
+  border: 1px solid rgba(239, 68, 68, 0.2);
+  color: var(--error);
+  padding: 12px 16px;
+  border-radius: var(--radius-md);
+  margin-bottom: 24px;
+  font-size: 0.875rem;
+}
+
+.admin-users-error svg {
+  flex-shrink: 0;
+}
+
+.admin-users-error span {
+  flex: 1;
+}
+
+.admin-users-error-dismiss {
+  background: transparent;
+  border: none;
+  padding: 4px;
+  color: var(--error);
+  cursor: pointer;
+  opacity: 0.7;
+  transition: opacity var(--transition-fast);
+}
+
+.admin-users-error-dismiss:hover {
+  opacity: 1;
+}
+
+.admin-users-access-denied {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding: 80px 24px;
+  text-align: center;
+}
+
+.admin-users-access-denied-icon {
+  color: var(--error);
+  margin-bottom: 24px;
+  opacity: 0.8;
+}
+
+.admin-users-access-denied h2 {
+  font-size: 1.5rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin-bottom: 12px;
+}
+
+.admin-users-access-denied p {
+  color: var(--text-tertiary);
+  font-size: 0.9375rem;
+  max-width: 400px;
+}
+
+.admin-users-create-form-card,
+.admin-users-reset-password-card {
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-lg);
+  padding: 24px;
+  margin-bottom: 24px;
+}
+
+.admin-users-create-form-header,
+.admin-users-reset-password-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 20px;
+}
+
+.admin-users-create-form-header h2,
+.admin-users-reset-password-header h2 {
+  font-size: 1.125rem;
+  font-weight: 600;
+  color: var(--text-primary);
+}
+
+.admin-users-create-form-close {
+  background: transparent;
+  border: none;
+  padding: 4px;
+  color: var(--text-tertiary);
+  cursor: pointer;
+  border-radius: var(--radius-sm);
+  transition: all var(--transition-fast);
+}
+
+.admin-users-create-form-close:hover {
+  background: var(--bg-hover);
+  color: var(--text-primary);
+}
+
+.admin-users-reset-password-info {
+  color: var(--text-secondary);
+  font-size: 0.875rem;
+  margin-bottom: 16px;
+}
+
+.admin-users-reset-password-info strong {
+  color: var(--text-primary);
+}
+
+.admin-users-create-error {
+  background: var(--error-bg);
+  border: 1px solid rgba(239, 68, 68, 0.2);
+  color: var(--error);
+  padding: 10px 14px;
+  border-radius: var(--radius-md);
+  font-size: 0.8125rem;
+  margin-bottom: 16px;
+}
+
+.admin-users-create-form,
+.admin-users-reset-password-form {
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+}
+
+.admin-users-form-group {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+
+.admin-users-form-group label {
+  font-size: 0.8125rem;
+  font-weight: 500;
+  color: var(--text-secondary);
+}
+
+.admin-users-form-group input[type="text"],
+.admin-users-form-group input[type="password"],
+.admin-users-form-group input[type="email"] {
+  padding: 12px 14px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  font-size: 0.875rem;
+  color: var(--text-primary);
+  transition: all var(--transition-fast);
+}
+
+.admin-users-form-group input::placeholder {
+  color: var(--text-muted);
+}
+
+.admin-users-form-group input:hover:not(:disabled) {
+  border-color: var(--border-secondary);
+  background: var(--bg-elevated);
+}
+
+.admin-users-form-group input:focus {
+  outline: none;
+  border-color: var(--accent-primary);
+  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
+  background: var(--bg-elevated);
+}
+
+.admin-users-form-group input:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
+
+.admin-users-checkbox-group {
+  flex-direction: row;
+  align-items: center;
+}
+
+.admin-users-checkbox-label {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  cursor: pointer;
+  font-size: 0.875rem;
+  font-weight: 400;
+  color: var(--text-secondary);
+  user-select: none;
+}
+
+.admin-users-checkbox-label input[type="checkbox"] {
+  position: absolute;
+  opacity: 0;
+  width: 0;
+  height: 0;
+}
+
+.admin-users-checkbox-custom {
+  width: 18px;
+  height: 18px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-secondary);
+  border-radius: var(--radius-sm);
+  transition: all var(--transition-fast);
+  position: relative;
+}
+
+.admin-users-checkbox-label input[type="checkbox"]:checked + .admin-users-checkbox-custom {
+  background: var(--accent-primary);
+  border-color: var(--accent-primary);
+}
+
+.admin-users-checkbox-label input[type="checkbox"]:checked + .admin-users-checkbox-custom::after {
+  content: '';
+  position: absolute;
+  left: 5px;
+  top: 2px;
+  width: 5px;
+  height: 9px;
+  border: solid white;
+  border-width: 0 2px 2px 0;
+  transform: rotate(45deg);
+}
+
+.admin-users-checkbox-label input[type="checkbox"]:focus + .admin-users-checkbox-custom {
+  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
+}
+
+.admin-users-checkbox-label:hover .admin-users-checkbox-custom {
+  border-color: var(--accent-primary);
+}
+
+.admin-users-form-actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: 12px;
+  margin-top: 8px;
+}
+
+.admin-users-cancel-button {
+  padding: 10px 18px;
+  background: transparent;
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: var(--text-secondary);
+  cursor: pointer;
+  transition: all var(--transition-fast);
+}
+
+.admin-users-cancel-button:hover:not(:disabled) {
+  background: var(--bg-hover);
+  border-color: var(--border-secondary);
+  color: var(--text-primary);
+}
+
+.admin-users-cancel-button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.admin-users-submit-button {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  padding: 10px 18px;
+  background: var(--accent-gradient);
+  border: none;
+  border-radius: var(--radius-md);
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: white;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  min-width: 120px;
+}
+
+.admin-users-submit-button:hover:not(:disabled) {
+  transform: translateY(-1px);
+  box-shadow: var(--shadow-sm), 0 0 20px rgba(16, 185, 129, 0.2);
+}
+
+.admin-users-submit-button:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+  transform: none;
+}
+
+.admin-users-button-spinner {
+  width: 14px;
+  height: 14px;
+  border: 2px solid rgba(255, 255, 255, 0.3);
+  border-top-color: white;
+  border-radius: 50%;
+  animation: admin-users-spin 0.6s linear infinite;
+}
+
+@keyframes admin-users-spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+.admin-users-list-container {
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-lg);
+  overflow: hidden;
+}
+
+.admin-users-list-loading,
+.admin-users-loading {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 12px;
+  padding: 64px 24px;
+  color: var(--text-tertiary);
+  font-size: 0.9375rem;
+}
+
+.admin-users-spinner {
+  width: 20px;
+  height: 20px;
+  border: 2px solid var(--border-secondary);
+  border-top-color: var(--accent-primary);
+  border-radius: 50%;
+  animation: admin-users-spin 0.6s linear infinite;
+}
+
+.admin-users-empty {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding: 64px 24px;
+  text-align: center;
+}
+
+.admin-users-empty-icon {
+  color: var(--text-muted);
+  margin-bottom: 16px;
+  opacity: 0.5;
+}
+
+.admin-users-empty h3 {
+  font-size: 1.125rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin-bottom: 8px;
+}
+
+.admin-users-empty p {
+  color: var(--text-tertiary);
+  font-size: 0.875rem;
+}
+
+.admin-users-list {
+  display: flex;
+  flex-direction: column;
+}
+
+.admin-users-list-header {
+  display: grid;
+  grid-template-columns: 2fr 100px 140px 140px 1fr;
+  gap: 16px;
+  padding: 14px 20px;
+  background: var(--bg-tertiary);
+  border-bottom: 1px solid var(--border-primary);
+  font-size: 0.75rem;
+  font-weight: 600;
+  color: var(--text-tertiary);
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+
+.admin-users-list-item {
+  display: grid;
+  grid-template-columns: 2fr 100px 140px 140px 1fr;
+  gap: 16px;
+  padding: 16px 20px;
+  align-items: center;
+  border-bottom: 1px solid var(--border-primary);
+  transition: background var(--transition-fast);
+}
+
+.admin-users-list-item:last-child {
+  border-bottom: none;
+}
+
+.admin-users-list-item:hover {
+  background: var(--bg-tertiary);
+}
+
+.admin-users-list-item.admin-users-inactive {
+  opacity: 0.6;
+}
+
+.admin-users-col-user {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+}
+
+.admin-users-item-avatar {
+  width: 36px;
+  height: 36px;
+  border-radius: 50%;
+  background: var(--accent-gradient);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: white;
+  font-weight: 600;
+  font-size: 0.875rem;
+  flex-shrink: 0;
+}
+
+.admin-users-item-info {
+  display: flex;
+  flex-direction: column;
+  min-width: 0;
+}
+
+.admin-users-item-username {
+  font-weight: 500;
+  color: var(--text-primary);
+  font-size: 0.9375rem;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.admin-users-admin-badge {
+  display: inline-flex;
+  padding: 2px 8px;
+  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15) 0%, rgba(5, 150, 105, 0.1) 100%);
+  border: 1px solid rgba(16, 185, 129, 0.3);
+  border-radius: 20px;
+  font-size: 0.6875rem;
+  font-weight: 600;
+  color: var(--accent-primary);
+  text-transform: uppercase;
+  letter-spacing: 0.03em;
+}
+
+.admin-users-item-email {
+  color: var(--text-tertiary);
+  font-size: 0.8125rem;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.admin-users-col-status {
+  display: flex;
+  align-items: center;
+}
+
+.admin-users-status-badge {
+  display: inline-flex;
+  padding: 4px 10px;
+  border-radius: 20px;
+  font-size: 0.75rem;
+  font-weight: 500;
+}
+
+.admin-users-status-badge.active {
+  background: var(--success-bg);
+  color: var(--success);
+}
+
+.admin-users-status-badge.inactive {
+  background: var(--error-bg);
+  color: var(--error);
+}
+
+.admin-users-col-created,
+.admin-users-col-login {
+  color: var(--text-secondary);
+  font-size: 0.8125rem;
+}
+
+.admin-users-col-actions {
+  display: flex;
+  justify-content: flex-end;
+}
+
+.admin-users-actions-menu {
+  display: flex;
+  gap: 6px;
+}
+
+.admin-users-action-button {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+  padding: 6px 10px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-sm);
+  font-size: 0.75rem;
+  font-weight: 500;
+  color: var(--text-secondary);
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  white-space: nowrap;
+}
+
+.admin-users-action-button:hover:not(:disabled) {
+  background: var(--bg-hover);
+  border-color: var(--border-secondary);
+  color: var(--text-primary);
+}
+
+.admin-users-action-button:disabled {
+  opacity: 0.4;
+  cursor: not-allowed;
+}
+
+.admin-users-action-spinner {
+  width: 12px;
+  height: 12px;
+  border: 2px solid var(--border-secondary);
+  border-top-color: var(--accent-primary);
+  border-radius: 50%;
+  animation: admin-users-spin 0.6s linear infinite;
+}
+
+@media (max-width: 1024px) {
+  .admin-users-list-header {
+    grid-template-columns: 2fr 100px 1fr;
+  }
+
+  .admin-users-list-item {
+    grid-template-columns: 2fr 100px 1fr;
+  }
+
+  .admin-users-col-created,
+  .admin-users-col-login {
+    display: none;
+  }
+
+  .admin-users-list-header .admin-users-col-created,
+  .admin-users-list-header .admin-users-col-login {
+    display: none;
+  }
+}
+
+@media (max-width: 768px) {
+  .admin-users-header {
+    flex-direction: column;
+    align-items: stretch;
+  }
+
+  .admin-users-create-button {
+    align-self: flex-start;
+  }
+
+  .admin-users-list-header {
+    display: none;
+  }
+
+  .admin-users-list-item {
+    grid-template-columns: 1fr;
+    gap: 12px;
+    padding: 16px;
+  }
+
+  .admin-users-col-user {
+    order: 1;
+  }
+
+  .admin-users-col-status {
+    order: 2;
+  }
+
+  .admin-users-col-actions {
+    order: 3;
+    justify-content: flex-start;
+  }
+
+  .admin-users-actions-menu {
+    flex-wrap: wrap;
+  }
+}

frontend/src/pages/AdminUsersPage.tsx

@@ -0,0 +1,529 @@
+import { useState, useEffect } from 'react';
+import { useNavigate } from 'react-router-dom';
+import { useAuth } from '../contexts/AuthContext';
+import { listUsers, createUser, updateUser, resetUserPassword } from '../api';
+import { AdminUser } from '../types';
+import './AdminUsersPage.css';
+
+function AdminUsersPage() {
+  const { user, loading: authLoading } = useAuth();
+  const navigate = useNavigate();
+
+  const [users, setUsers] = useState<AdminUser[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+
+  const [showCreateForm, setShowCreateForm] = useState(false);
+  const [createUsername, setCreateUsername] = useState('');
+  const [createPassword, setCreatePassword] = useState('');
+  const [createEmail, setCreateEmail] = useState('');
+  const [createIsAdmin, setCreateIsAdmin] = useState(false);
+  const [isCreating, setIsCreating] = useState(false);
+  const [createError, setCreateError] = useState<string | null>(null);
+
+  const [resetPasswordUsername, setResetPasswordUsername] = useState<string | null>(null);
+  const [newPassword, setNewPassword] = useState('');
+  const [isResetting, setIsResetting] = useState(false);
+
+  const [togglingUser, setTogglingUser] = useState<string | null>(null);
+
+  const [successMessage, setSuccessMessage] = useState<string | null>(null);
+
+  useEffect(() => {
+    if (!authLoading && !user) {
+      navigate('/login', { state: { from: '/admin/users' } });
+    }
+  }, [user, authLoading, navigate]);
+
+  useEffect(() => {
+    if (user && user.is_admin) {
+      loadUsers();
+    }
+  }, [user]);
+
+  useEffect(() => {
+    if (successMessage) {
+      const timer = setTimeout(() => setSuccessMessage(null), 3000);
+      return () => clearTimeout(timer);
+    }
+  }, [successMessage]);
+
+  async function loadUsers() {
+    setLoading(true);
+    setError(null);
+    try {
+      const data = await listUsers();
+      setUsers(data);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to load users');
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  async function handleCreate(e: React.FormEvent) {
+    e.preventDefault();
+    if (!createUsername.trim()) {
+      setCreateError('Username is required');
+      return;
+    }
+    if (!createPassword.trim()) {
+      setCreateError('Password is required');
+      return;
+    }
+
+    setIsCreating(true);
+    setCreateError(null);
+    try {
+      await createUser({
+        username: createUsername.trim(),
+        password: createPassword,
+        email: createEmail.trim() || undefined,
+        is_admin: createIsAdmin,
+      });
+      setShowCreateForm(false);
+      setCreateUsername('');
+      setCreatePassword('');
+      setCreateEmail('');
+      setCreateIsAdmin(false);
+      setSuccessMessage('User created successfully');
+      await loadUsers();
+    } catch (err) {
+      setCreateError(err instanceof Error ? err.message : 'Failed to create user');
+    } finally {
+      setIsCreating(false);
+    }
+  }
+
+  async function handleToggleAdmin(targetUser: AdminUser) {
+    setTogglingUser(targetUser.username);
+    try {
+      await updateUser(targetUser.username, { is_admin: !targetUser.is_admin });
+      setSuccessMessage(`${targetUser.username} is ${!targetUser.is_admin ? 'now' : 'no longer'} an admin`);
+      await loadUsers();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to update user');
+    } finally {
+      setTogglingUser(null);
+    }
+  }
+
+  async function handleToggleActive(targetUser: AdminUser) {
+    setTogglingUser(targetUser.username);
+    try {
+      await updateUser(targetUser.username, { is_active: !targetUser.is_active });
+      setSuccessMessage(`${targetUser.username} has been ${!targetUser.is_active ? 'enabled' : 'disabled'}`);
+      await loadUsers();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to update user');
+    } finally {
+      setTogglingUser(null);
+    }
+  }
+
+  async function handleResetPassword(e: React.FormEvent) {
+    e.preventDefault();
+    if (!resetPasswordUsername || !newPassword.trim()) {
+      return;
+    }
+
+    setIsResetting(true);
+    try {
+      await resetUserPassword(resetPasswordUsername, newPassword);
+      setResetPasswordUsername(null);
+      setNewPassword('');
+      setSuccessMessage(`Password reset for ${resetPasswordUsername}`);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to reset password');
+    } finally {
+      setIsResetting(false);
+    }
+  }
+
+  function formatDate(dateString: string | null): string {
+    if (!dateString) return 'Never';
+    return new Date(dateString).toLocaleDateString('en-US', {
+      year: 'numeric',
+      month: 'short',
+      day: 'numeric',
+      hour: '2-digit',
+      minute: '2-digit',
+    });
+  }
+
+  if (authLoading) {
+    return (
+      <div className="admin-users-page">
+        <div className="admin-users-loading">
+          <div className="admin-users-spinner"></div>
+          <span>Loading...</span>
+        </div>
+      </div>
+    );
+  }
+
+  if (!user) {
+    return null;
+  }
+
+  if (!user.is_admin) {
+    return (
+      <div className="admin-users-page">
+        <div className="admin-users-access-denied">
+          <div className="admin-users-access-denied-icon">
+            <svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.5">
+              <circle cx="12" cy="12" r="10"/>
+              <line x1="4.93" y1="4.93" x2="19.07" y2="19.07"/>
+            </svg>
+          </div>
+          <h2>Access Denied</h2>
+          <p>You do not have permission to access this page. Admin privileges are required.</p>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="admin-users-page">
+      <div className="admin-users-header">
+        <div className="admin-users-header-content">
+          <h1>User Management</h1>
+          <p className="admin-users-subtitle">
+            Manage user accounts and permissions
+          </p>
+        </div>
+        <button
+          className="admin-users-create-button"
+          onClick={() => setShowCreateForm(true)}
+          disabled={showCreateForm}
+        >
+          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+            <line x1="12" y1="5" x2="12" y2="19"/>
+            <line x1="5" y1="12" x2="19" y2="12"/>
+          </svg>
+          Create User
+        </button>
+      </div>
+
+      {successMessage && (
+        <div className="admin-users-success">
+          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+            <path d="M22 11.08V12a10 10 0 1 1-5.93-9.14"/>
+            <polyline points="22 4 12 14.01 9 11.01"/>
+          </svg>
+          <span>{successMessage}</span>
+        </div>
+      )}
+
+      {error && (
+        <div className="admin-users-error">
+          <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+            <circle cx="12" cy="12" r="10"/>
+            <line x1="12" y1="8" x2="12" y2="12"/>
+            <line x1="12" y1="16" x2="12.01" y2="16"/>
+          </svg>
+          <span>{error}</span>
+          <button onClick={() => setError(null)} className="admin-users-error-dismiss">
+            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+              <line x1="18" y1="6" x2="6" y2="18"/>
+              <line x1="6" y1="6" x2="18" y2="18"/>
+            </svg>
+          </button>
+        </div>
+      )}
+
+      {showCreateForm && (
+        <div className="admin-users-create-form-card">
+          <div className="admin-users-create-form-header">
+            <h2>Create New User</h2>
+            <button
+              className="admin-users-create-form-close"
+              onClick={() => {
+                setShowCreateForm(false);
+                setCreateUsername('');
+                setCreatePassword('');
+                setCreateEmail('');
+                setCreateIsAdmin(false);
+                setCreateError(null);
+              }}
+            >
+              <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                <line x1="18" y1="6" x2="6" y2="18"/>
+                <line x1="6" y1="6" x2="18" y2="18"/>
+              </svg>
+            </button>
+          </div>
+
+          {createError && (
+            <div className="admin-users-create-error">
+              {createError}
+            </div>
+          )}
+
+          <form onSubmit={handleCreate} className="admin-users-create-form">
+            <div className="admin-users-form-group">
+              <label htmlFor="username">Username</label>
+              <input
+                id="username"
+                type="text"
+                value={createUsername}
+                onChange={(e) => setCreateUsername(e.target.value)}
+                placeholder="Enter username"
+                autoFocus
+                disabled={isCreating}
+              />
+            </div>
+
+            <div className="admin-users-form-group">
+              <label htmlFor="password">Password</label>
+              <input
+                id="password"
+                type="password"
+                value={createPassword}
+                onChange={(e) => setCreatePassword(e.target.value)}
+                placeholder="Enter password"
+                disabled={isCreating}
+              />
+            </div>
+
+            <div className="admin-users-form-group">
+              <label htmlFor="email">Email (optional)</label>
+              <input
+                id="email"
+                type="email"
+                value={createEmail}
+                onChange={(e) => setCreateEmail(e.target.value)}
+                placeholder="user@example.com"
+                disabled={isCreating}
+              />
+            </div>
+
+            <div className="admin-users-form-group admin-users-checkbox-group">
+              <label className="admin-users-checkbox-label">
+                <input
+                  type="checkbox"
+                  checked={createIsAdmin}
+                  onChange={(e) => setCreateIsAdmin(e.target.checked)}
+                  disabled={isCreating}
+                />
+                <span className="admin-users-checkbox-custom"></span>
+                Grant admin privileges
+              </label>
+            </div>
+
+            <div className="admin-users-form-actions">
+              <button
+                type="button"
+                className="admin-users-cancel-button"
+                onClick={() => {
+                  setShowCreateForm(false);
+                  setCreateUsername('');
+                  setCreatePassword('');
+                  setCreateEmail('');
+                  setCreateIsAdmin(false);
+                  setCreateError(null);
+                }}
+                disabled={isCreating}
+              >
+                Cancel
+              </button>
+              <button
+                type="submit"
+                className="admin-users-submit-button"
+                disabled={isCreating || !createUsername.trim() || !createPassword.trim()}
+              >
+                {isCreating ? (
+                  <>
+                    <span className="admin-users-button-spinner"></span>
+                    Creating...
+                  </>
+                ) : (
+                  'Create User'
+                )}
+              </button>
+            </div>
+          </form>
+        </div>
+      )}
+
+      {resetPasswordUsername && (
+        <div className="admin-users-reset-password-card">
+          <div className="admin-users-reset-password-header">
+            <h2>Reset Password</h2>
+            <button
+              className="admin-users-create-form-close"
+              onClick={() => {
+                setResetPasswordUsername(null);
+                setNewPassword('');
+              }}
+            >
+              <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                <line x1="18" y1="6" x2="6" y2="18"/>
+                <line x1="6" y1="6" x2="18" y2="18"/>
+              </svg>
+            </button>
+          </div>
+          <p className="admin-users-reset-password-info">
+            Set a new password for <strong>{resetPasswordUsername}</strong>
+          </p>
+          <form onSubmit={handleResetPassword} className="admin-users-reset-password-form">
+            <div className="admin-users-form-group">
+              <label htmlFor="new-password">New Password</label>
+              <input
+                id="new-password"
+                type="password"
+                value={newPassword}
+                onChange={(e) => setNewPassword(e.target.value)}
+                placeholder="Enter new password"
+                autoFocus
+                disabled={isResetting}
+              />
+            </div>
+            <div className="admin-users-form-actions">
+              <button
+                type="button"
+                className="admin-users-cancel-button"
+                onClick={() => {
+                  setResetPasswordUsername(null);
+                  setNewPassword('');
+                }}
+                disabled={isResetting}
+              >
+                Cancel
+              </button>
+              <button
+                type="submit"
+                className="admin-users-submit-button"
+                disabled={isResetting || !newPassword.trim()}
+              >
+                {isResetting ? (
+                  <>
+                    <span className="admin-users-button-spinner"></span>
+                    Resetting...
+                  </>
+                ) : (
+                  'Reset Password'
+                )}
+              </button>
+            </div>
+          </form>
+        </div>
+      )}
+
+      <div className="admin-users-list-container">
+        {loading ? (
+          <div className="admin-users-list-loading">
+            <div className="admin-users-spinner"></div>
+            <span>Loading users...</span>
+          </div>
+        ) : users.length === 0 ? (
+          <div className="admin-users-empty">
+            <div className="admin-users-empty-icon">
+              <svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.5">
+                <path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"/>
+                <circle cx="9" cy="7" r="4"/>
+                <path d="M23 21v-2a4 4 0 0 0-3-3.87"/>
+                <path d="M16 3.13a4 4 0 0 1 0 7.75"/>
+              </svg>
+            </div>
+            <h3>No Users</h3>
+            <p>Create a user to get started</p>
+          </div>
+        ) : (
+          <div className="admin-users-list">
+            <div className="admin-users-list-header">
+              <span className="admin-users-col-user">User</span>
+              <span className="admin-users-col-status">Status</span>
+              <span className="admin-users-col-created">Created</span>
+              <span className="admin-users-col-login">Last Login</span>
+              <span className="admin-users-col-actions">Actions</span>
+            </div>
+            {users.map((u) => (
+              <div key={u.id} className={`admin-users-list-item ${!u.is_active ? 'admin-users-inactive' : ''}`}>
+                <div className="admin-users-col-user">
+                  <div className="admin-users-item-avatar">
+                    {u.username.charAt(0).toUpperCase()}
+                  </div>
+                  <div className="admin-users-item-info">
+                    <div className="admin-users-item-username">
+                      {u.username}
+                      {u.is_admin && <span className="admin-users-admin-badge">Admin</span>}
+                    </div>
+                    {u.email && (
+                      <div className="admin-users-item-email">{u.email}</div>
+                    )}
+                  </div>
+                </div>
+                <div className="admin-users-col-status">
+                  <span className={`admin-users-status-badge ${u.is_active ? 'active' : 'inactive'}`}>
+                    {u.is_active ? 'Active' : 'Disabled'}
+                  </span>
+                </div>
+                <div className="admin-users-col-created">
+                  {formatDate(u.created_at)}
+                </div>
+                <div className="admin-users-col-login">
+                  {formatDate(u.last_login)}
+                </div>
+                <div className="admin-users-col-actions">
+                  <div className="admin-users-actions-menu">
+                    <button
+                      className="admin-users-action-button"
+                      onClick={() => handleToggleAdmin(u)}
+                      disabled={togglingUser === u.username || u.username === user.username}
+                      title={u.is_admin ? 'Remove admin' : 'Make admin'}
+                    >
+                      {togglingUser === u.username ? (
+                        <span className="admin-users-action-spinner"></span>
+                      ) : (
+                        <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                          <path d="M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z"/>
+                        </svg>
+                      )}
+                      {u.is_admin ? 'Revoke' : 'Admin'}
+                    </button>
+                    <button
+                      className="admin-users-action-button"
+                      onClick={() => handleToggleActive(u)}
+                      disabled={togglingUser === u.username || u.username === user.username}
+                      title={u.is_active ? 'Disable user' : 'Enable user'}
+                    >
+                      {togglingUser === u.username ? (
+                        <span className="admin-users-action-spinner"></span>
+                      ) : u.is_active ? (
+                        <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                          <circle cx="12" cy="12" r="10"/>
+                          <line x1="4.93" y1="4.93" x2="19.07" y2="19.07"/>
+                        </svg>
+                      ) : (
+                        <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                          <path d="M22 11.08V12a10 10 0 1 1-5.93-9.14"/>
+                          <polyline points="22 4 12 14.01 9 11.01"/>
+                        </svg>
+                      )}
+                      {u.is_active ? 'Disable' : 'Enable'}
+                    </button>
+                    <button
+                      className="admin-users-action-button"
+                      onClick={() => setResetPasswordUsername(u.username)}
+                      disabled={togglingUser === u.username}
+                      title="Reset password"
+                    >
+                      <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                        <rect x="3" y="11" width="18" height="11" rx="2" ry="2"/>
+                        <path d="M7 11V7a5 5 0 0 1 10 0v4"/>
+                      </svg>
+                      Reset
+                    </button>
+                  </div>
+                </div>
+              </div>
+            ))}
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}
+
+export default AdminUsersPage;

frontend/src/pages/ChangePasswordPage.tsx

@@ -0,0 +1,156 @@
+import { useState } from 'react';
+import { useNavigate } from 'react-router-dom';
+import { useAuth } from '../contexts/AuthContext';
+import { changePassword } from '../api';
+import './LoginPage.css';
+
+function ChangePasswordPage() {
+  const [currentPassword, setCurrentPassword] = useState('');
+  const [newPassword, setNewPassword] = useState('');
+  const [confirmPassword, setConfirmPassword] = useState('');
+  const [isSubmitting, setIsSubmitting] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const { user, refreshUser } = useAuth();
+  const navigate = useNavigate();
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+
+    if (!currentPassword || !newPassword || !confirmPassword) {
+      setError('Please fill in all fields');
+      return;
+    }
+
+    if (newPassword !== confirmPassword) {
+      setError('New passwords do not match');
+      return;
+    }
+
+    if (newPassword.length < 8) {
+      setError('New password must be at least 8 characters');
+      return;
+    }
+
+    if (newPassword === currentPassword) {
+      setError('New password must be different from current password');
+      return;
+    }
+
+    setIsSubmitting(true);
+    setError(null);
+
+    try {
+      await changePassword(currentPassword, newPassword);
+      // Refresh user to clear must_change_password flag
+      await refreshUser();
+      navigate('/', { replace: true });
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to change password');
+    } finally {
+      setIsSubmitting(false);
+    }
+  }
+
+  return (
+    <div className="login-page">
+      <div className="login-container">
+        <div className="login-card">
+          <div className="login-header">
+            <div className="login-logo">
+              <svg width="48" height="48" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+                <path d="M6 14 Q6 8 3 8 Q6 4 6 4 Q6 4 9 8 Q6 8 6 14" fill="currentColor" opacity="0.6"/>
+                <rect x="5.25" y="13" width="1.5" height="4" fill="currentColor" opacity="0.6"/>
+                <path d="M12 12 Q12 5 8 5 Q12 1 12 1 Q12 1 16 5 Q12 5 12 12" fill="currentColor"/>
+                <rect x="11.25" y="11" width="1.5" height="5" fill="currentColor"/>
+                <path d="M18 14 Q18 8 15 8 Q18 4 18 4 Q18 4 21 8 Q18 8 18 14" fill="currentColor" opacity="0.6"/>
+                <rect x="17.25" y="13" width="1.5" height="4" fill="currentColor" opacity="0.6"/>
+                <ellipse cx="12" cy="19" rx="9" ry="1.5" fill="currentColor" opacity="0.3"/>
+              </svg>
+            </div>
+            <h1>Change Password</h1>
+            {user?.must_change_password && (
+              <p className="login-subtitle login-warning">
+                You must change your password before continuing
+              </p>
+            )}
+          </div>
+
+          {error && (
+            <div className="login-error">
+              <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                <circle cx="12" cy="12" r="10"/>
+                <line x1="12" y1="8" x2="12" y2="12"/>
+                <line x1="12" y1="16" x2="12.01" y2="16"/>
+              </svg>
+              <span>{error}</span>
+            </div>
+          )}
+
+          <form onSubmit={handleSubmit} className="login-form">
+            <div className="login-form-group">
+              <label htmlFor="currentPassword">Current Password</label>
+              <input
+                id="currentPassword"
+                type="password"
+                value={currentPassword}
+                onChange={(e) => setCurrentPassword(e.target.value)}
+                placeholder="Enter current password"
+                autoComplete="current-password"
+                autoFocus
+                disabled={isSubmitting}
+              />
+            </div>
+
+            <div className="login-form-group">
+              <label htmlFor="newPassword">New Password</label>
+              <input
+                id="newPassword"
+                type="password"
+                value={newPassword}
+                onChange={(e) => setNewPassword(e.target.value)}
+                placeholder="Enter new password (min 8 characters)"
+                autoComplete="new-password"
+                disabled={isSubmitting}
+              />
+            </div>
+
+            <div className="login-form-group">
+              <label htmlFor="confirmPassword">Confirm New Password</label>
+              <input
+                id="confirmPassword"
+                type="password"
+                value={confirmPassword}
+                onChange={(e) => setConfirmPassword(e.target.value)}
+                placeholder="Confirm new password"
+                autoComplete="new-password"
+                disabled={isSubmitting}
+              />
+            </div>
+
+            <button
+              type="submit"
+              className="login-submit"
+              disabled={isSubmitting}
+            >
+              {isSubmitting ? (
+                <>
+                  <span className="login-spinner"></span>
+                  Changing password...
+                </>
+              ) : (
+                'Change Password'
+              )}
+            </button>
+          </form>
+        </div>
+
+        <div className="login-footer">
+          <p>Artifact storage and management system</p>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+export default ChangePasswordPage;

frontend/src/pages/Home.css

@@ -1,6 +1,6 @@
 /* Page Layout */
 .home {
-  max-width: 1000px;
+  max-width: 1200px;
   margin: 0 auto;
 }
 
@@ -474,3 +474,16 @@
   margin-top: 4px;
   font-size: 0.9375rem;
 }
+
+/* Lock icon for private projects */
+.lock-icon {
+  color: var(--warning);
+  flex-shrink: 0;
+}
+
+/* Project badges container */
+.project-badges {
+  display: flex;
+  gap: 6px;
+  flex-wrap: wrap;
+}

frontend/src/pages/Home.tsx

@@ -1,19 +1,24 @@
 import { useState, useEffect, useCallback } from 'react';
-import { Link, useSearchParams } from 'react-router-dom';
+import { Link, useSearchParams, useNavigate } from 'react-router-dom';
 import { Project, PaginatedResponse } from '../types';
 import { listProjects, createProject } from '../api';
 import { Badge } from '../components/Badge';
-import { SortDropdown, SortOption } from '../components/SortDropdown';
+import { DataTable } from '../components/DataTable';
 import { FilterDropdown, FilterOption } from '../components/FilterDropdown';
 import { FilterChip, FilterChipGroup } from '../components/FilterChip';
 import { Pagination } from '../components/Pagination';
+import { useAuth } from '../contexts/AuthContext';
 import './Home.css';
 
-const SORT_OPTIONS: SortOption[] = [
-  { value: 'name', label: 'Name' },
-  { value: 'created_at', label: 'Created' },
-  { value: 'updated_at', label: 'Updated' },
-];
+// Lock icon SVG component
+function LockIcon() {
+  return (
+    <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" className="lock-icon">
+      <rect x="3" y="11" width="18" height="11" rx="2" ry="2" />
+      <path d="M7 11V7a5 5 0 0 1 10 0v4" />
+    </svg>
+  );
+}
 
 const VISIBILITY_OPTIONS: FilterOption[] = [
   { value: '', label: 'All Projects' },
@@ -23,6 +28,8 @@ const VISIBILITY_OPTIONS: FilterOption[] = [
 
 function Home() {
   const [searchParams, setSearchParams] = useSearchParams();
+  const navigate = useNavigate();
+  const { user } = useAuth();
 
   const [projectsData, setProjectsData] = useState<PaginatedResponse<Project> | null>(null);
   const [loading, setLoading] = useState(true);
@@ -89,8 +96,10 @@ function Home() {
     }
   }
 
-  const handleSortChange = (newSort: string, newOrder: 'asc' | 'desc') => {
-    updateParams({ sort: newSort, order: newOrder, page: '1' });
+  const handleSortChange = (columnKey: string) => {
+    // Toggle order if clicking the same column, otherwise default to asc
+    const newOrder = columnKey === sort ? (order === 'asc' ? 'desc' : 'asc') : 'asc';
+    updateParams({ sort: columnKey, order: newOrder, page: '1' });
   };
 
   const handleVisibilityChange = (value: string) => {
@@ -117,9 +126,15 @@ function Home() {
     <div className="home">
       <div className="page-header">
         <h1>Projects</h1>
-        <button className="btn btn-primary" onClick={() => setShowForm(!showForm)}>
-          {showForm ? 'Cancel' : '+ New Project'}
-        </button>
+        {user ? (
+          <button className="btn btn-primary" onClick={() => setShowForm(!showForm)}>
+            {showForm ? 'Cancel' : '+ New Project'}
+          </button>
+        ) : (
+          <Link to="/login" className="btn btn-secondary">
+            Login to create projects
+          </Link>
+        )}
       </div>
 
       {error && <div className="error-message">{error}</div>}
@@ -171,7 +186,6 @@ function Home() {
           value={visibility}
           onChange={handleVisibilityChange}
         />
-        <SortDropdown options={SORT_OPTIONS} value={sort} order={order} onChange={handleSortChange} />
       </div>
 
       {hasActiveFilters && (
@@ -186,49 +200,106 @@ function Home() {
         </FilterChipGroup>
       )}
 
-      {projects.length === 0 ? (
-        <div className="empty-state">
-          {hasActiveFilters ? (
-            <p>No projects match your filters. Try adjusting your search.</p>
-          ) : (
-            <p>No projects yet. Create your first project to get started!</p>
-          )}
-        </div>
-      ) : (
-        <>
-          <div className="project-grid">
-            {projects.map((project) => (
-              <Link to={`/project/${project.name}`} key={project.id} className="project-card card">
-                <h3>{project.name}</h3>
-                {project.description && <p>{project.description}</p>}
-                <div className="project-meta">
-                  <Badge variant={project.is_public ? 'public' : 'private'}>
-                    {project.is_public ? 'Public' : 'Private'}
-                  </Badge>
-                  <div className="project-meta__dates">
-                    <span className="date">Created {new Date(project.created_at).toLocaleDateString()}</span>
-                    {project.updated_at !== project.created_at && (
-                      <span className="date">Updated {new Date(project.updated_at).toLocaleDateString()}</span>
-                    )}
-                  </div>
-                </div>
-                <div className="project-meta__owner">
-                  <span className="owner">by {project.created_by}</span>
-                </div>
-              </Link>
-            ))}
-          </div>
+      <div className="data-table--responsive">
+        <DataTable
+          data={projects}
+          keyExtractor={(project) => project.id}
+          onRowClick={(project) => navigate(`/project/${project.name}`)}
+          onSort={handleSortChange}
+          sortKey={sort}
+          sortOrder={order}
+          emptyMessage={
+            hasActiveFilters
+              ? 'No projects match your filters. Try adjusting your search.'
+              : 'No projects yet. Create your first project to get started!'
+          }
+          columns={[
+            {
+              key: 'name',
+              header: 'Name',
+              sortable: true,
+              render: (project) => (
+                <span className="cell-name">
+                  {!project.is_public && <LockIcon />}
+                  {project.name}
+                </span>
+              ),
+            },
+            {
+              key: 'description',
+              header: 'Description',
+              className: 'cell-description',
+              render: (project) => project.description || '—',
+            },
+            {
+              key: 'visibility',
+              header: 'Visibility',
+              render: (project) => (
+                <Badge variant={project.is_public ? 'public' : 'private'}>
+                  {project.is_public ? 'Public' : 'Private'}
+                </Badge>
+              ),
+            },
+            {
+              key: 'created_by',
+              header: 'Owner',
+              className: 'cell-owner',
+              render: (project) => project.created_by,
+            },
+            ...(user
+              ? [
+                  {
+                    key: 'access_level',
+                    header: 'Access',
+                    render: (project: Project) =>
+                      project.access_level ? (
+                        <Badge
+                          variant={
+                            project.is_owner
+                              ? 'success'
+                              : project.access_level === 'admin'
+                                ? 'success'
+                                : project.access_level === 'write'
+                                  ? 'info'
+                                  : 'default'
+                          }
+                        >
+                          {project.is_owner
+                            ? 'Owner'
+                            : project.access_level.charAt(0).toUpperCase() + project.access_level.slice(1)}
+                        </Badge>
+                      ) : (
+                        '—'
+                      ),
+                  },
+                ]
+              : []),
+            {
+              key: 'created_at',
+              header: 'Created',
+              sortable: true,
+              className: 'cell-date',
+              render: (project) => new Date(project.created_at).toLocaleDateString(),
+            },
+            {
+              key: 'updated_at',
+              header: 'Updated',
+              sortable: true,
+              className: 'cell-date',
+              render: (project) => new Date(project.updated_at).toLocaleDateString(),
+            },
+          ]}
+        />
+      </div>
 
-          {pagination && pagination.total_pages > 1 && (
-            <Pagination
-              page={pagination.page}
-              totalPages={pagination.total_pages}
-              total={pagination.total}
-              limit={pagination.limit}
-              onPageChange={handlePageChange}
-            />
-          )}
-        </>
+      {pagination && pagination.total_pages > 1 && (
+        <Pagination
+          page={pagination.page}
+          totalPages={pagination.total_pages}
+          total={pagination.total}
+          limit={pagination.limit}
+          onPageChange={handlePageChange}
+        />
       )}
     </div>
   );

frontend/src/pages/LoginPage.css

@@ -0,0 +1,292 @@
+/* Login Page - Full viewport centered layout */
+.login-page {
+  min-height: 100vh;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: var(--bg-primary);
+  padding: 24px;
+  position: relative;
+  overflow: hidden;
+}
+
+/* Subtle background pattern */
+.login-page::before {
+  content: '';
+  position: absolute;
+  inset: 0;
+  background: 
+    radial-gradient(circle at 20% 50%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
+    radial-gradient(circle at 80% 50%, rgba(16, 185, 129, 0.05) 0%, transparent 50%);
+  pointer-events: none;
+}
+
+.login-container {
+  width: 100%;
+  max-width: 400px;
+  position: relative;
+  z-index: 1;
+}
+
+/* Card styling */
+.login-card {
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-xl);
+  padding: 40px;
+  box-shadow: var(--shadow-lg);
+}
+
+/* Header section */
+.login-header {
+  text-align: center;
+  margin-bottom: 32px;
+}
+
+.login-logo {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 80px;
+  height: 80px;
+  background: var(--accent-gradient);
+  border-radius: var(--radius-lg);
+  color: white;
+  margin-bottom: 24px;
+  box-shadow: var(--shadow-glow);
+}
+
+.login-header h1 {
+  font-size: 1.5rem;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin-bottom: 8px;
+  letter-spacing: -0.02em;
+}
+
+.login-subtitle {
+  color: var(--text-tertiary);
+  font-size: 0.875rem;
+}
+
+.login-subtitle.login-warning {
+  color: var(--warning);
+  font-weight: 500;
+}
+
+/* Error message */
+.login-error {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  background: var(--error-bg);
+  border: 1px solid rgba(239, 68, 68, 0.2);
+  color: var(--error);
+  padding: 12px 16px;
+  border-radius: var(--radius-md);
+  margin-bottom: 24px;
+  font-size: 0.875rem;
+}
+
+.login-error svg {
+  flex-shrink: 0;
+}
+
+/* Form styling */
+.login-form {
+  display: flex;
+  flex-direction: column;
+  gap: 20px;
+}
+
+.login-form-group {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.login-form-group label {
+  font-size: 0.875rem;
+  font-weight: 500;
+  color: var(--text-secondary);
+}
+
+.login-form-group input {
+  width: 100%;
+  padding: 14px 16px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  font-size: 0.9375rem;
+  color: var(--text-primary);
+  transition: all var(--transition-fast);
+}
+
+.login-form-group input::placeholder {
+  color: var(--text-muted);
+}
+
+.login-form-group input:hover:not(:disabled) {
+  border-color: var(--border-secondary);
+  background: var(--bg-elevated);
+}
+
+.login-form-group input:focus {
+  outline: none;
+  border-color: var(--accent-primary);
+  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
+  background: var(--bg-elevated);
+}
+
+.login-form-group input:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
+
+/* Submit button */
+.login-submit {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 10px;
+  width: 100%;
+  padding: 14px 20px;
+  background: var(--accent-gradient);
+  border: none;
+  border-radius: var(--radius-md);
+  font-size: 0.9375rem;
+  font-weight: 500;
+  color: white;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+  margin-top: 8px;
+  box-shadow: var(--shadow-sm), 0 0 20px rgba(16, 185, 129, 0.2);
+}
+
+.login-submit:hover:not(:disabled) {
+  transform: translateY(-1px);
+  box-shadow: var(--shadow-md), 0 0 30px rgba(16, 185, 129, 0.3);
+}
+
+.login-submit:active:not(:disabled) {
+  transform: translateY(0);
+}
+
+.login-submit:disabled {
+  opacity: 0.7;
+  cursor: not-allowed;
+  transform: none;
+}
+
+/* Loading spinner */
+.login-spinner {
+  width: 16px;
+  height: 16px;
+  border: 2px solid rgba(255, 255, 255, 0.3);
+  border-top-color: white;
+  border-radius: 50%;
+  animation: spin 0.6s linear infinite;
+}
+
+@keyframes spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+/* Loading state */
+.login-loading {
+  text-align: center;
+  padding: 64px 32px;
+  color: var(--text-tertiary);
+  font-size: 0.9375rem;
+}
+
+/* Footer */
+.login-footer {
+  text-align: center;
+  margin-top: 24px;
+  padding-top: 24px;
+}
+
+.login-footer p {
+  color: var(--text-muted);
+  font-size: 0.8125rem;
+}
+
+/* SSO Divider */
+.login-divider {
+  display: flex;
+  align-items: center;
+  gap: 16px;
+  margin: 24px 0;
+}
+
+.login-divider::before,
+.login-divider::after {
+  content: '';
+  flex: 1;
+  height: 1px;
+  background: var(--border-primary);
+}
+
+.login-divider span {
+  font-size: 0.8125rem;
+  color: var(--text-muted);
+  text-transform: lowercase;
+}
+
+/* SSO Button */
+.login-sso-button {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 10px;
+  width: 100%;
+  padding: 14px 20px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  font-size: 0.9375rem;
+  font-weight: 500;
+  color: var(--text-primary);
+  text-decoration: none;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+}
+
+.login-sso-button:hover {
+  background: var(--bg-hover);
+  border-color: var(--border-secondary);
+  transform: translateY(-1px);
+  box-shadow: var(--shadow-sm);
+}
+
+.login-sso-button:active {
+  transform: translateY(0);
+}
+
+.login-sso-button svg {
+  color: var(--accent-primary);
+}
+
+/* Responsive adjustments */
+@media (max-width: 480px) {
+  .login-card {
+    padding: 32px 24px;
+  }
+
+  .login-logo {
+    width: 64px;
+    height: 64px;
+  }
+
+  .login-logo svg {
+    width: 36px;
+    height: 36px;
+  }
+
+  .login-header h1 {
+    font-size: 1.25rem;
+  }
+}

frontend/src/pages/LoginPage.tsx

@@ -0,0 +1,186 @@
+import { useState, useEffect } from 'react';
+import { useNavigate, useLocation, useSearchParams } from 'react-router-dom';
+import { useAuth } from '../contexts/AuthContext';
+import { getOIDCStatus, getOIDCLoginUrl } from '../api';
+import { OIDCStatus } from '../types';
+import './LoginPage.css';
+
+function LoginPage() {
+  const [username, setUsername] = useState('');
+  const [password, setPassword] = useState('');
+  const [isSubmitting, setIsSubmitting] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+  const [oidcStatus, setOidcStatus] = useState<OIDCStatus | null>(null);
+  const [searchParams] = useSearchParams();
+
+  const { user, login, loading: authLoading, refreshUser } = useAuth();
+  const navigate = useNavigate();
+  const location = useLocation();
+
+  // Get the return URL from location state, default to home
+  const from = (location.state as { from?: string })?.from || '/';
+
+  // Load OIDC status on mount
+  useEffect(() => {
+    getOIDCStatus()
+      .then(setOidcStatus)
+      .catch(() => setOidcStatus({ enabled: false }));
+  }, []);
+
+  // Handle SSO callback - check for oidc_success or oidc_error params
+  useEffect(() => {
+    const oidcSuccess = searchParams.get('oidc_success');
+    const oidcError = searchParams.get('oidc_error');
+
+    if (oidcSuccess === 'true') {
+      refreshUser().then(() => {
+        navigate(from, { replace: true });
+      });
+    } else if (oidcError) {
+      setError(decodeURIComponent(oidcError));
+    }
+  }, [searchParams, refreshUser, navigate, from]);
+
+  // Redirect if already logged in
+  useEffect(() => {
+    if (user && !authLoading) {
+      navigate(from, { replace: true });
+    }
+  }, [user, authLoading, navigate, from]);
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    
+    if (!username.trim() || !password) {
+      setError('Please enter both username and password');
+      return;
+    }
+
+    setIsSubmitting(true);
+    setError(null);
+
+    try {
+      await login(username, password);
+      navigate(from, { replace: true });
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Login failed. Please try again.');
+    } finally {
+      setIsSubmitting(false);
+    }
+  }
+
+  // Show loading while checking auth state
+  if (authLoading) {
+    return (
+      <div className="login-page">
+        <div className="login-container">
+          <div className="login-loading">Checking session...</div>
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <div className="login-page">
+      <div className="login-container">
+        <div className="login-card">
+          <div className="login-header">
+            <div className="login-logo">
+              <svg width="48" height="48" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+                <path d="M6 14 Q6 8 3 8 Q6 4 6 4 Q6 4 9 8 Q6 8 6 14" fill="currentColor" opacity="0.6"/>
+                <rect x="5.25" y="13" width="1.5" height="4" fill="currentColor" opacity="0.6"/>
+                <path d="M12 12 Q12 5 8 5 Q12 1 12 1 Q12 1 16 5 Q12 5 12 12" fill="currentColor"/>
+                <rect x="11.25" y="11" width="1.5" height="5" fill="currentColor"/>
+                <path d="M18 14 Q18 8 15 8 Q18 4 18 4 Q18 4 21 8 Q18 8 18 14" fill="currentColor" opacity="0.6"/>
+                <rect x="17.25" y="13" width="1.5" height="4" fill="currentColor" opacity="0.6"/>
+                <ellipse cx="12" cy="19" rx="9" ry="1.5" fill="currentColor" opacity="0.3"/>
+              </svg>
+            </div>
+            <h1>Sign in to Orchard</h1>
+            <p className="login-subtitle">Content-Addressable Storage</p>
+          </div>
+
+          {error && (
+            <div className="login-error">
+              <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                <circle cx="12" cy="12" r="10"/>
+                <line x1="12" y1="8" x2="12" y2="12"/>
+                <line x1="12" y1="16" x2="12.01" y2="16"/>
+              </svg>
+              <span>{error}</span>
+            </div>
+          )}
+
+          <form onSubmit={handleSubmit} className="login-form">
+            <div className="login-form-group">
+              <label htmlFor="username">Username</label>
+              <input
+                id="username"
+                type="text"
+                value={username}
+                onChange={(e) => setUsername(e.target.value)}
+                placeholder="Enter your username"
+                autoComplete="username"
+                autoFocus
+                disabled={isSubmitting}
+              />
+            </div>
+
+            <div className="login-form-group">
+              <label htmlFor="password">Password</label>
+              <input
+                id="password"
+                type="password"
+                value={password}
+                onChange={(e) => setPassword(e.target.value)}
+                placeholder="Enter your password"
+                autoComplete="current-password"
+                disabled={isSubmitting}
+              />
+            </div>
+
+            <button
+              type="submit"
+              className="login-submit"
+              disabled={isSubmitting}
+            >
+              {isSubmitting ? (
+                <>
+                  <span className="login-spinner"></span>
+                  Signing in...
+                </>
+              ) : (
+                'Sign in'
+              )}
+            </button>
+          </form>
+
+          {oidcStatus?.enabled && (
+            <>
+              <div className="login-divider">
+                <span>or</span>
+              </div>
+              <a
+                href={getOIDCLoginUrl(from !== '/' ? from : undefined)}
+                className="login-sso-button"
+              >
+                <svg width="18" height="18" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                  <path d="M15 3h4a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2h-4"/>
+                  <polyline points="10 17 15 12 10 7"/>
+                  <line x1="15" y1="12" x2="3" y2="12"/>
+                </svg>
+                Sign in with SSO
+              </a>
+            </>
+          )}
+        </div>
+
+        <div className="login-footer">
+          <p>Artifact storage and management system</p>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+export default LoginPage;

frontend/src/pages/PackagePage.css

@@ -127,6 +127,58 @@ h2 {
   font-size: 0.75rem;
 }
 
+/* Download by Artifact ID Section */
+.download-by-id-section {
+  margin-top: 32px;
+  background: var(--bg-secondary);
+}
+
+.download-by-id-section h3 {
+  margin-bottom: 12px;
+  color: var(--text-primary);
+  font-size: 1rem;
+  font-weight: 600;
+}
+
+.download-by-id-form {
+  display: flex;
+  gap: 12px;
+  align-items: center;
+}
+
+.artifact-id-input {
+  flex: 1;
+  padding: 10px 16px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
+  font-size: 0.8125rem;
+  color: var(--text-primary);
+}
+
+.artifact-id-input::placeholder {
+  color: var(--text-muted);
+}
+
+.artifact-id-input:focus {
+  outline: none;
+  border-color: var(--accent-primary);
+}
+
+.btn-disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+  pointer-events: none;
+}
+
+.validation-hint {
+  margin-top: 8px;
+  margin-bottom: 0;
+  font-size: 0.75rem;
+  color: var(--warning-color, #f59e0b);
+}
+
 /* Usage Section */
 .usage-section {
   margin-top: 32px;
@@ -272,6 +324,86 @@ tr:hover .copy-btn {
   color: var(--text-muted);
 }
 
+/* Version badge */
+.version-badge {
+  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
+  font-size: 0.8125rem;
+  color: var(--accent-primary);
+  background: rgba(16, 185, 129, 0.1);
+  padding: 2px 8px;
+  border-radius: var(--radius-sm);
+}
+
+/* Create Tag Section */
+.create-tag-section {
+  margin-top: 32px;
+  background: var(--bg-secondary);
+}
+
+.create-tag-section h3 {
+  margin-bottom: 4px;
+  color: var(--text-primary);
+  font-size: 1rem;
+  font-weight: 600;
+}
+
+.section-description {
+  color: var(--text-muted);
+  font-size: 0.875rem;
+  margin-bottom: 16px;
+}
+
+.create-tag-form .form-row {
+  display: flex;
+  gap: 12px;
+  align-items: flex-end;
+  flex-wrap: wrap;
+}
+
+.create-tag-form .form-group {
+  flex: 1;
+  min-width: 150px;
+}
+
+.create-tag-form .form-group--wide {
+  flex: 2;
+  min-width: 300px;
+}
+
+.create-tag-form .form-group label {
+  display: block;
+  margin-bottom: 6px;
+  font-size: 0.75rem;
+  font-weight: 500;
+  color: var(--text-secondary);
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+}
+
+.create-tag-form .form-group input {
+  width: 100%;
+  padding: 10px 14px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  color: var(--text-primary);
+  font-size: 0.875rem;
+}
+
+.create-tag-form .form-group input:focus {
+  outline: none;
+  border-color: var(--accent-primary);
+}
+
+.create-tag-form .form-group input:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
+
+.create-tag-form button {
+  flex-shrink: 0;
+}
+
 /* Created cell */
 .created-cell {
   display: flex;

frontend/src/pages/PackagePage.tsx

@@ -1,22 +1,18 @@
-import { useState, useEffect, useRef, useCallback } from 'react';
-import { useParams, useSearchParams, useNavigate } from 'react-router-dom';
-import { TagDetail, Package, PaginatedResponse } from '../types';
-import { listTags, uploadArtifact, getDownloadUrl, getPackage } from '../api';
+import { useState, useEffect, useCallback } from 'react';
+import { useParams, useSearchParams, useNavigate, useLocation } from 'react-router-dom';
+import { TagDetail, Package, PaginatedResponse, AccessLevel } from '../types';
+import { listTags, getDownloadUrl, getPackage, getMyProjectAccess, createTag, UnauthorizedError, ForbiddenError } from '../api';
 import { Breadcrumb } from '../components/Breadcrumb';
 import { Badge } from '../components/Badge';
 import { SearchInput } from '../components/SearchInput';
-import { SortDropdown, SortOption } from '../components/SortDropdown';
 import { FilterChip, FilterChipGroup } from '../components/FilterChip';
 import { DataTable } from '../components/DataTable';
 import { Pagination } from '../components/Pagination';
+import { DragDropUpload, UploadResult } from '../components/DragDropUpload';
+import { useAuth } from '../contexts/AuthContext';
 import './Home.css';
 import './PackagePage.css';
 
-const SORT_OPTIONS: SortOption[] = [
-  { value: 'name', label: 'Name' },
-  { value: 'created_at', label: 'Created' },
-];
-
 function formatBytes(bytes: number): string {
   if (bytes === 0) return '0 B';
   const k = 1024;
@@ -55,16 +51,25 @@ function CopyButton({ text }: { text: string }) {
 function PackagePage() {
   const { projectName, packageName } = useParams<{ projectName: string; packageName: string }>();
   const navigate = useNavigate();
+  const location = useLocation();
   const [searchParams, setSearchParams] = useSearchParams();
+  const { user } = useAuth();
 
   const [pkg, setPkg] = useState<Package | null>(null);
   const [tagsData, setTagsData] = useState<PaginatedResponse<TagDetail> | null>(null);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
-  const [uploading, setUploading] = useState(false);
-  const [uploadResult, setUploadResult] = useState<string | null>(null);
-  const [tag, setTag] = useState('');
-  const fileInputRef = useRef<HTMLInputElement>(null);
+  const [accessDenied, setAccessDenied] = useState(false);
+  const [uploadTag, setUploadTag] = useState('');
+  const [uploadSuccess, setUploadSuccess] = useState<string | null>(null);
+  const [artifactIdInput, setArtifactIdInput] = useState('');
+  const [accessLevel, setAccessLevel] = useState<AccessLevel | null>(null);
+  const [createTagName, setCreateTagName] = useState('');
+  const [createTagArtifactId, setCreateTagArtifactId] = useState('');
+  const [createTagLoading, setCreateTagLoading] = useState(false);
+
+  // Derived permissions
+  const canWrite = accessLevel === 'write' || accessLevel === 'admin';
 
   // Get params from URL
   const page = parseInt(searchParams.get('page') || '1', 10);
@@ -92,19 +97,32 @@ function PackagePage() {
 
     try {
       setLoading(true);
-      const [pkgData, tagsResult] = await Promise.all([
+      setAccessDenied(false);
+      const [pkgData, tagsResult, accessResult] = await Promise.all([
         getPackage(projectName, packageName),
         listTags(projectName, packageName, { page, search, sort, order }),
+        getMyProjectAccess(projectName),
       ]);
       setPkg(pkgData);
       setTagsData(tagsResult);
+      setAccessLevel(accessResult.access_level);
       setError(null);
     } catch (err) {
+      if (err instanceof UnauthorizedError) {
+        navigate('/login', { state: { from: location.pathname } });
+        return;
+      }
+      if (err instanceof ForbiddenError) {
+        setAccessDenied(true);
+        setError('You do not have access to this package');
+        setLoading(false);
+        return;
+      }
       setError(err instanceof Error ? err.message : 'Failed to load data');
     } finally {
       setLoading(false);
     }
-  }, [projectName, packageName, page, search, sort, order]);
+  }, [projectName, packageName, page, search, sort, order, navigate, location.pathname]);
 
   useEffect(() => {
     loadData();
@@ -122,37 +140,54 @@ function PackagePage() {
     return () => window.removeEventListener('keydown', handleKeyDown);
   }, [navigate, projectName]);
 
-  async function handleUpload(e: React.FormEvent) {
+  const handleUploadComplete = useCallback((results: UploadResult[]) => {
+    const count = results.length;
+    const message = count === 1 
+      ? `Uploaded successfully! Artifact ID: ${results[0].artifact_id}`
+      : `${count} files uploaded successfully!`;
+    setUploadSuccess(message);
+    setUploadTag('');
+    loadData();
+    
+    // Auto-dismiss success message after 5 seconds
+    setTimeout(() => setUploadSuccess(null), 5000);
+  }, [loadData]);
+
+  const handleUploadError = useCallback((errorMsg: string) => {
+    setError(errorMsg);
+  }, []);
+
+  const handleCreateTag = async (e: React.FormEvent) => {
     e.preventDefault();
-    const file = fileInputRef.current?.files?.[0];
-    if (!file) {
-      setError('Please select a file');
-      return;
-    }
+    if (!createTagName.trim() || createTagArtifactId.length !== 64) return;
+
+    setCreateTagLoading(true);
+    setError(null);
 
     try {
-      setUploading(true);
-      setError(null);
-      const result = await uploadArtifact(projectName!, packageName!, file, tag || undefined);
-      setUploadResult(`Uploaded successfully! Artifact ID: ${result.artifact_id}`);
-      setTag('');
-      if (fileInputRef.current) {
-        fileInputRef.current.value = '';
-      }
+      await createTag(projectName!, packageName!, {
+        name: createTagName.trim(),
+        artifact_id: createTagArtifactId,
+      });
+      setUploadSuccess(`Tag "${createTagName}" created successfully!`);
+      setCreateTagName('');
+      setCreateTagArtifactId('');
       loadData();
+      setTimeout(() => setUploadSuccess(null), 5000);
     } catch (err) {
-      setError(err instanceof Error ? err.message : 'Upload failed');
+      setError(err instanceof Error ? err.message : 'Failed to create tag');
     } finally {
-      setUploading(false);
+      setCreateTagLoading(false);
     }
-  }
+  };
 
   const handleSearchChange = (value: string) => {
     updateParams({ search: value, page: '1' });
   };
 
-  const handleSortChange = (newSort: string, newOrder: 'asc' | 'desc') => {
-    updateParams({ sort: newSort, order: newOrder, page: '1' });
+  const handleSortChange = (columnKey: string) => {
+    const newOrder = columnKey === sort ? (order === 'asc' ? 'desc' : 'asc') : 'asc';
+    updateParams({ sort: columnKey, order: newOrder, page: '1' });
   };
 
   const handlePageChange = (newPage: number) => {
@@ -174,6 +209,13 @@ function PackagePage() {
       sortable: true,
       render: (t: TagDetail) => <strong>{t.name}</strong>,
     },
+    {
+      key: 'version',
+      header: 'Version',
+      render: (t: TagDetail) => (
+        <span className="version-badge">{t.version || '-'}</span>
+      ),
+    },
     {
       key: 'artifact_id',
       header: 'Artifact ID',
@@ -185,19 +227,19 @@ function PackagePage() {
       ),
     },
     {
-      key: 'size',
+      key: 'artifact_size',
       header: 'Size',
       render: (t: TagDetail) => <span>{formatBytes(t.artifact_size)}</span>,
     },
     {
-      key: 'content_type',
+      key: 'artifact_content_type',
       header: 'Type',
       render: (t: TagDetail) => (
         <span className="content-type">{t.artifact_content_type || '-'}</span>
       ),
     },
     {
-      key: 'original_name',
+      key: 'artifact_original_name',
       header: 'Filename',
       className: 'cell-truncate',
       render: (t: TagDetail) => (
@@ -234,6 +276,28 @@ function PackagePage() {
     return <div className="loading">Loading...</div>;
   }
 
+  if (accessDenied) {
+    return (
+      <div className="home">
+        <Breadcrumb
+          items={[
+            { label: 'Projects', href: '/' },
+            { label: projectName!, href: `/project/${projectName}` },
+          ]}
+        />
+        <div className="error-message" style={{ textAlign: 'center', padding: '48px 24px' }}>
+          <h2>Access Denied</h2>
+          <p>You do not have permission to view this package.</p>
+          {!user && (
+            <p style={{ marginTop: '16px' }}>
+              <a href="/login" className="btn btn-primary">Sign in</a>
+            </p>
+          )}
+        </div>
+      </div>
+    );
+  }
+
   return (
     <div className="home">
       <Breadcrumb
@@ -292,30 +356,43 @@ function PackagePage() {
       </div>
 
       {error && <div className="error-message">{error}</div>}
-      {uploadResult && <div className="success-message">{uploadResult}</div>}
+      {uploadSuccess && <div className="success-message">{uploadSuccess}</div>}
 
-      <div className="upload-section card">
-        <h3>Upload Artifact</h3>
-        <form onSubmit={handleUpload} className="upload-form">
-          <div className="form-group">
-            <label htmlFor="file">File</label>
-            <input id="file" type="file" ref={fileInputRef} required />
-          </div>
-          <div className="form-group">
-            <label htmlFor="tag">Tag (optional)</label>
-            <input
-              id="tag"
-              type="text"
-              value={tag}
-              onChange={(e) => setTag(e.target.value)}
-              placeholder="v1.0.0, latest, stable..."
+      {user && (
+        <div className="upload-section card">
+          <h3>Upload Artifact</h3>
+          {canWrite ? (
+            <div className="upload-form">
+              <div className="form-group">
+                <label htmlFor="upload-tag">Tag (optional)</label>
+                <input
+                  id="upload-tag"
+                  type="text"
+                  value={uploadTag}
+                  onChange={(e) => setUploadTag(e.target.value)}
+                  placeholder="v1.0.0, latest, stable..."
+                />
+              </div>
+              <DragDropUpload
+                projectName={projectName!}
+                packageName={packageName!}
+                tag={uploadTag || undefined}
+                onUploadComplete={handleUploadComplete}
+                onUploadError={handleUploadError}
+              />
+            </div>
+          ) : (
+            <DragDropUpload
+              projectName={projectName!}
+              packageName={packageName!}
+              disabled={true}
+              disabledReason="You have read-only access to this project and cannot upload artifacts."
+              onUploadComplete={handleUploadComplete}
+              onUploadError={handleUploadError}
             />
-          </div>
-          <button type="submit" className="btn btn-primary" disabled={uploading}>
-            {uploading ? 'Uploading...' : 'Upload'}
-          </button>
-        </form>
-      </div>
+          )}
+        </div>
+      )}
 
       <div className="section-header">
         <h2>Tags / Versions</h2>
@@ -328,7 +405,6 @@ function PackagePage() {
           placeholder="Filter tags..."
           className="list-controls__search"
         />
-        <SortDropdown options={SORT_OPTIONS} value={sort} order={order} onChange={handleSortChange} />
       </div>
 
       {hasActiveFilters && (
@@ -337,25 +413,21 @@ function PackagePage() {
         </FilterChipGroup>
       )}
 
-      <DataTable
-        data={tags}
-        columns={columns}
-        keyExtractor={(t) => t.id}
-        emptyMessage={
-          hasActiveFilters
-            ? 'No tags match your filters. Try adjusting your search.'
-            : 'No tags yet. Upload an artifact with a tag to create one!'
-        }
-        onSort={(key) => {
-          if (key === sort) {
-            handleSortChange(key, order === 'asc' ? 'desc' : 'asc');
-          } else {
-            handleSortChange(key, 'asc');
+      <div className="data-table--responsive">
+        <DataTable
+          data={tags}
+          columns={columns}
+          keyExtractor={(t) => t.id}
+          emptyMessage={
+            hasActiveFilters
+              ? 'No tags match your filters. Try adjusting your search.'
+              : 'No tags yet. Upload an artifact with a tag to create one!'
           }
-        }}
-        sortKey={sort}
-        sortOrder={order}
-      />
+          onSort={handleSortChange}
+          sortKey={sort}
+          sortOrder={order}
+        />
+      </div>
 
       {pagination && pagination.total_pages > 1 && (
         <Pagination
@@ -367,6 +439,78 @@ function PackagePage() {
         />
       )}
 
+      <div className="download-by-id-section card">
+        <h3>Download by Artifact ID</h3>
+        <div className="download-by-id-form">
+          <input
+            type="text"
+            value={artifactIdInput}
+            onChange={(e) => setArtifactIdInput(e.target.value.toLowerCase().replace(/[^a-f0-9]/g, '').slice(0, 64))}
+            placeholder="Enter SHA256 artifact ID (64 hex characters)"
+            className="artifact-id-input"
+          />
+          <a
+            href={artifactIdInput.length === 64 ? getDownloadUrl(projectName!, packageName!, `artifact:${artifactIdInput}`) : '#'}
+            className={`btn btn-primary ${artifactIdInput.length !== 64 ? 'btn-disabled' : ''}`}
+            download
+            onClick={(e) => {
+              if (artifactIdInput.length !== 64) {
+                e.preventDefault();
+              }
+            }}
+          >
+            Download
+          </a>
+        </div>
+        {artifactIdInput.length > 0 && artifactIdInput.length !== 64 && (
+          <p className="validation-hint">Artifact ID must be exactly 64 hex characters ({artifactIdInput.length}/64)</p>
+        )}
+      </div>
+
+      {user && canWrite && (
+        <div className="create-tag-section card">
+          <h3>Create / Update Tag</h3>
+          <p className="section-description">Point a tag at any existing artifact by its ID</p>
+          <form onSubmit={handleCreateTag} className="create-tag-form">
+            <div className="form-row">
+              <div className="form-group">
+                <label htmlFor="create-tag-name">Tag Name</label>
+                <input
+                  id="create-tag-name"
+                  type="text"
+                  value={createTagName}
+                  onChange={(e) => setCreateTagName(e.target.value)}
+                  placeholder="latest, stable, v1.0.0..."
+                  disabled={createTagLoading}
+                />
+              </div>
+              <div className="form-group form-group--wide">
+                <label htmlFor="create-tag-artifact">Artifact ID</label>
+                <input
+                  id="create-tag-artifact"
+                  type="text"
+                  value={createTagArtifactId}
+                  onChange={(e) => setCreateTagArtifactId(e.target.value.toLowerCase().replace(/[^a-f0-9]/g, '').slice(0, 64))}
+                  placeholder="SHA256 hash (64 hex characters)"
+                  className="artifact-id-input"
+                  disabled={createTagLoading}
+                />
+              </div>
+              <button
+                type="submit"
+                className="btn btn-primary"
+                disabled={createTagLoading || !createTagName.trim() || createTagArtifactId.length !== 64}
+              >
+                {createTagLoading ? 'Creating...' : 'Create Tag'}
+              </button>
+            </div>
+            {createTagArtifactId.length > 0 && createTagArtifactId.length !== 64 && (
+              <p className="validation-hint">Artifact ID must be exactly 64 hex characters ({createTagArtifactId.length}/64)</p>
+            )}
+          </form>
+        </div>
+      )}
+
       <div className="usage-section card">
         <h3>Usage</h3>
         <p>Download artifacts using:</p>

frontend/src/pages/ProjectPage.tsx

@@ -1,21 +1,17 @@
 import { useState, useEffect, useCallback } from 'react';
-import { useParams, Link, useSearchParams, useNavigate } from 'react-router-dom';
-import { Project, Package, PaginatedResponse } from '../types';
-import { getProject, listPackages, createPackage } from '../api';
+import { useParams, useSearchParams, useNavigate, useLocation } from 'react-router-dom';
+import { Project, Package, PaginatedResponse, AccessLevel } from '../types';
+import { getProject, listPackages, createPackage, getMyProjectAccess, UnauthorizedError, ForbiddenError } from '../api';
 import { Breadcrumb } from '../components/Breadcrumb';
 import { Badge } from '../components/Badge';
+import { DataTable } from '../components/DataTable';
 import { SearchInput } from '../components/SearchInput';
-import { SortDropdown, SortOption } from '../components/SortDropdown';
 import { FilterChip, FilterChipGroup } from '../components/FilterChip';
 import { Pagination } from '../components/Pagination';
+import { AccessManagement } from '../components/AccessManagement';
+import { useAuth } from '../contexts/AuthContext';
 import './Home.css';
 
-const SORT_OPTIONS: SortOption[] = [
-  { value: 'name', label: 'Name' },
-  { value: 'created_at', label: 'Created' },
-  { value: 'updated_at', label: 'Updated' },
-];
-
 const FORMAT_OPTIONS = ['generic', 'npm', 'pypi', 'docker', 'deb', 'rpm', 'maven', 'nuget', 'helm'];
 
 function formatBytes(bytes: number): string {
@@ -29,15 +25,24 @@ function formatBytes(bytes: number): string {
 function ProjectPage() {
   const { projectName } = useParams<{ projectName: string }>();
   const navigate = useNavigate();
+  const location = useLocation();
   const [searchParams, setSearchParams] = useSearchParams();
+  const { user } = useAuth();
 
   const [project, setProject] = useState<Project | null>(null);
   const [packagesData, setPackagesData] = useState<PaginatedResponse<Package> | null>(null);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
+  const [accessDenied, setAccessDenied] = useState(false);
   const [showForm, setShowForm] = useState(false);
   const [newPackage, setNewPackage] = useState({ name: '', description: '', format: 'generic', platform: 'any' });
   const [creating, setCreating] = useState(false);
+  const [accessLevel, setAccessLevel] = useState<AccessLevel | null>(null);
+  const [isOwner, setIsOwner] = useState(false);
+
+  // Derived permissions
+  const canWrite = accessLevel === 'write' || accessLevel === 'admin';
+  const canAdmin = accessLevel === 'admin';
 
   // Get params from URL
   const page = parseInt(searchParams.get('page') || '1', 10);
@@ -66,19 +71,33 @@ function ProjectPage() {
 
     try {
       setLoading(true);
-      const [projectData, packagesResult] = await Promise.all([
+      setAccessDenied(false);
+      const [projectData, packagesResult, accessResult] = await Promise.all([
         getProject(projectName),
         listPackages(projectName, { page, search, sort, order, format: format || undefined }),
+        getMyProjectAccess(projectName),
       ]);
       setProject(projectData);
       setPackagesData(packagesResult);
+      setAccessLevel(accessResult.access_level);
+      setIsOwner(accessResult.is_owner);
       setError(null);
     } catch (err) {
+      if (err instanceof UnauthorizedError) {
+        navigate('/login', { state: { from: location.pathname } });
+        return;
+      }
+      if (err instanceof ForbiddenError) {
+        setAccessDenied(true);
+        setError('You do not have access to this project');
+        setLoading(false);
+        return;
+      }
       setError(err instanceof Error ? err.message : 'Failed to load data');
     } finally {
       setLoading(false);
     }
-  }, [projectName, page, search, sort, order, format]);
+  }, [projectName, page, search, sort, order, format, navigate, location.pathname]);
 
   useEffect(() => {
     loadData();
@@ -115,8 +134,9 @@ function ProjectPage() {
     updateParams({ search: value, page: '1' });
   };
 
-  const handleSortChange = (newSort: string, newOrder: 'asc' | 'desc') => {
-    updateParams({ sort: newSort, order: newOrder, page: '1' });
+  const handleSortChange = (columnKey: string) => {
+    const newOrder = columnKey === sort ? (order === 'asc' ? 'desc' : 'asc') : 'asc';
+    updateParams({ sort: columnKey, order: newOrder, page: '1' });
   };
 
   const handleFormatChange = (value: string) => {
@@ -139,6 +159,23 @@ function ProjectPage() {
     return <div className="loading">Loading...</div>;
   }
 
+  if (accessDenied) {
+    return (
+      <div className="home">
+        <Breadcrumb items={[{ label: 'Projects', href: '/' }]} />
+        <div className="error-message" style={{ textAlign: 'center', padding: '48px 24px' }}>
+          <h2>Access Denied</h2>
+          <p>You do not have permission to view this project.</p>
+          {!user && (
+            <p style={{ marginTop: '16px' }}>
+              <a href="/login" className="btn btn-primary">Sign in</a>
+            </p>
+          )}
+        </div>
+      </div>
+    );
+  }
+
   if (!project) {
     return <div className="error-message">Project not found</div>;
   }
@@ -159,6 +196,11 @@ function ProjectPage() {
             <Badge variant={project.is_public ? 'public' : 'private'}>
               {project.is_public ? 'Public' : 'Private'}
             </Badge>
+            {accessLevel && (
+              <Badge variant={accessLevel === 'admin' ? 'success' : accessLevel === 'write' ? 'info' : 'default'}>
+                {isOwner ? 'Owner' : accessLevel.charAt(0).toUpperCase() + accessLevel.slice(1)}
+              </Badge>
+            )}
           </div>
           {project.description && <p className="description">{project.description}</p>}
           <div className="page-header__meta">
@@ -169,14 +211,20 @@ function ProjectPage() {
             <span className="meta-item">by {project.created_by}</span>
           </div>
         </div>
-        <button className="btn btn-primary" onClick={() => setShowForm(!showForm)}>
-          {showForm ? 'Cancel' : '+ New Package'}
-        </button>
+        {canWrite ? (
+          <button className="btn btn-primary" onClick={() => setShowForm(!showForm)}>
+            {showForm ? 'Cancel' : '+ New Package'}
+          </button>
+        ) : user ? (
+          <span className="text-muted" title="You have read-only access to this project">
+            Read-only access
+          </span>
+        ) : null}
       </div>
 
       {error && <div className="error-message">{error}</div>}
 
-      {showForm && (
+      {showForm && canWrite && (
         <form className="form card" onSubmit={handleCreatePackage}>
           <h3>Create New Package</h3>
           <div className="form-row">
@@ -241,7 +289,6 @@ function ProjectPage() {
             </option>
           ))}
         </select>
-        <SortDropdown options={SORT_OPTIONS} value={sort} order={order} onChange={handleSortChange} />
       </div>
 
       {hasActiveFilters && (
@@ -251,70 +298,82 @@ function ProjectPage() {
         </FilterChipGroup>
       )}
 
-      {packages.length === 0 ? (
-        <div className="empty-state">
-          {hasActiveFilters ? (
-            <p>No packages match your filters. Try adjusting your search.</p>
-          ) : (
-            <p>No packages yet. Create your first package to start uploading artifacts!</p>
-          )}
-        </div>
-      ) : (
-        <>
-          <div className="project-grid">
-            {packages.map((pkg) => (
-              <Link to={`/project/${projectName}/${pkg.name}`} key={pkg.id} className="project-card card">
-                <div className="package-card__header">
-                  <h3>{pkg.name}</h3>
-                  <Badge variant="default">{pkg.format}</Badge>
-                </div>
-                {pkg.description && <p>{pkg.description}</p>}
+      <div className="data-table--responsive">
+        <DataTable
+          data={packages}
+          keyExtractor={(pkg) => pkg.id}
+          onRowClick={(pkg) => navigate(`/project/${projectName}/${pkg.name}`)}
+          onSort={handleSortChange}
+          sortKey={sort}
+          sortOrder={order}
+          emptyMessage={
+            hasActiveFilters
+              ? 'No packages match your filters. Try adjusting your search.'
+              : 'No packages yet. Create your first package to start uploading artifacts!'
+          }
+          columns={[
+            {
+              key: 'name',
+              header: 'Name',
+              sortable: true,
+              render: (pkg) => <span className="cell-name">{pkg.name}</span>,
+            },
+            {
+              key: 'description',
+              header: 'Description',
+              className: 'cell-description',
+              render: (pkg) => pkg.description || '—',
+            },
+            {
+              key: 'format',
+              header: 'Format',
+              render: (pkg) => <Badge variant="default">{pkg.format}</Badge>,
+            },
+            {
+              key: 'tag_count',
+              header: 'Tags',
+              render: (pkg) => pkg.tag_count ?? '—',
+            },
+            {
+              key: 'artifact_count',
+              header: 'Artifacts',
+              render: (pkg) => pkg.artifact_count ?? '—',
+            },
+            {
+              key: 'total_size',
+              header: 'Size',
+              render: (pkg) =>
+                pkg.total_size !== undefined && pkg.total_size > 0 ? formatBytes(pkg.total_size) : '—',
+            },
+            {
+              key: 'latest_tag',
+              header: 'Latest',
+              render: (pkg) =>
+                pkg.latest_tag ? <strong style={{ color: 'var(--accent-primary)' }}>{pkg.latest_tag}</strong> : '—',
+            },
+            {
+              key: 'created_at',
+              header: 'Created',
+              sortable: true,
+              className: 'cell-date',
+              render: (pkg) => new Date(pkg.created_at).toLocaleDateString(),
+            },
+          ]}
+        />
+      </div>
 
-                {(pkg.tag_count !== undefined || pkg.artifact_count !== undefined) && (
-                  <div className="package-stats">
-                    {pkg.tag_count !== undefined && (
-                      <div className="package-stats__item">
-                        <span className="package-stats__value">{pkg.tag_count}</span>
-                        <span className="package-stats__label">Tags</span>
-                      </div>
-                    )}
-                    {pkg.artifact_count !== undefined && (
-                      <div className="package-stats__item">
-                        <span className="package-stats__value">{pkg.artifact_count}</span>
-                        <span className="package-stats__label">Artifacts</span>
-                      </div>
-                    )}
-                    {pkg.total_size !== undefined && pkg.total_size > 0 && (
-                      <div className="package-stats__item">
-                        <span className="package-stats__value">{formatBytes(pkg.total_size)}</span>
-                        <span className="package-stats__label">Size</span>
-                      </div>
-                    )}
-                  </div>
-                )}
+      {pagination && pagination.total_pages > 1 && (
+        <Pagination
+          page={pagination.page}
+          totalPages={pagination.total_pages}
+          total={pagination.total}
+          limit={pagination.limit}
+          onPageChange={handlePageChange}
+        />
+      )}
 
-                <div className="project-meta">
-                  {pkg.latest_tag && (
-                    <span className="latest-tag">
-                      Latest: <strong>{pkg.latest_tag}</strong>
-                    </span>
-                  )}
-                  <span className="date">Created {new Date(pkg.created_at).toLocaleDateString()}</span>
-                </div>
-              </Link>
-            ))}
-          </div>
-
-          {pagination && pagination.total_pages > 1 && (
-            <Pagination
-              page={pagination.page}
-              totalPages={pagination.total_pages}
-              total={pagination.total}
-              limit={pagination.limit}
-              onPageChange={handlePageChange}
-            />
-          )}
-        </>
+      {canAdmin && projectName && (
+        <AccessManagement projectName={projectName} />
       )}
     </div>
   );

frontend/src/test/setup.ts

@@ -0,0 +1,37 @@
+import '@testing-library/jest-dom';
+
+class MockDataTransfer implements DataTransfer {
+  dropEffect: DataTransfer['dropEffect'] = 'none';
+  effectAllowed: DataTransfer['effectAllowed'] = 'all';
+  files: FileList = Object.assign([], { item: (i: number) => this.files[i] || null });
+  items: DataTransferItemList = Object.assign([], {
+    add: () => null,
+    remove: () => {},
+    clear: () => {},
+    item: () => null,
+  }) as unknown as DataTransferItemList;
+  types: readonly string[] = [];
+
+  clearData(): void {}
+  getData(): string { return ''; }
+  setData(): void {}
+  setDragImage(): void {}
+}
+
+Object.defineProperty(globalThis, 'DataTransfer', {
+  value: MockDataTransfer,
+});
+
+Object.defineProperty(window, 'matchMedia', {
+  writable: true,
+  value: (query: string) => ({
+    matches: false,
+    media: query,
+    onchange: null,
+    addListener: () => {},
+    removeListener: () => {},
+    addEventListener: () => {},
+    removeEventListener: () => {},
+    dispatchEvent: () => false,
+  }),
+});

frontend/src/types.ts

@@ -1,3 +1,6 @@
+// Access Control types (moved to top for use in Project interface)
+export type AccessLevel = 'read' | 'write' | 'admin';
+
 export interface Project {
   id: string;
   name: string;
@@ -6,6 +9,9 @@ export interface Project {
   created_at: string;
   updated_at: string;
   created_by: string;
+  // Access level info (populated when listing projects)
+  access_level?: AccessLevel | null;
+  is_owner?: boolean;
 }
 
 export interface TagSummary {
@@ -57,6 +63,22 @@ export interface TagDetail extends Tag {
   artifact_original_name: string | null;
   artifact_created_at: string;
   artifact_format_metadata: Record<string, unknown> | null;
+  version: string | null;
+}
+
+export interface PackageVersion {
+  id: string;
+  package_id: string;
+  artifact_id: string;
+  version: string;
+  version_source: string | null;
+  created_at: string;
+  created_by: string;
+  // Enriched fields from joins
+  size?: number;
+  content_type?: string | null;
+  original_name?: string | null;
+  tags?: string[];
 }
 
 export interface ArtifactTagInfo {
@@ -116,6 +138,8 @@ export interface UploadResponse {
   project: string;
   package: string;
   tag: string | null;
+  version: string | null;
+  version_source: string | null;
 }
 
 // Global search types
@@ -225,3 +249,127 @@ export interface CrossProjectStats {
   bytes_saved_cross_project: number;
   duplicates: CrossProjectDuplicate[];
 }
+
+// Auth types
+export interface User {
+  id: string;
+  username: string;
+  display_name: string | null;
+  is_admin: boolean;
+  must_change_password?: boolean;
+}
+
+export interface LoginCredentials {
+  username: string;
+  password: string;
+}
+
+// API Key types
+export interface APIKey {
+  id: string;
+  name: string;
+  description: string | null;
+  scopes: string[];
+  created_at: string;
+  expires_at: string | null;
+  last_used: string | null;
+}
+
+export interface APIKeyCreate {
+  name: string;
+  description?: string;
+}
+
+export interface APIKeyCreateResponse {
+  id: string;
+  name: string;
+  description: string | null;
+  scopes: string[];
+  key: string;
+  created_at: string;
+  expires_at: string | null;
+}
+
+// Admin User Management types
+export interface AdminUser {
+  id: string;
+  username: string;
+  email: string | null;
+  display_name: string | null;
+  is_admin: boolean;
+  is_active: boolean;
+  created_at: string;
+  last_login: string | null;
+}
+
+export interface UserCreate {
+  username: string;
+  password: string;
+  email?: string;
+  is_admin?: boolean;
+}
+
+export interface UserUpdate {
+  email?: string;
+  is_admin?: boolean;
+  is_active?: boolean;
+}
+
+// Access Permission types
+export interface AccessPermission {
+  id: string;
+  project_id: string;
+  user_id: string;
+  level: AccessLevel;
+  created_at: string;
+  expires_at: string | null;
+}
+
+export interface AccessPermissionCreate {
+  username: string;
+  level: AccessLevel;
+  expires_at?: string;
+}
+
+export interface AccessPermissionUpdate {
+  level?: AccessLevel;
+  expires_at?: string | null;
+}
+
+// Extended Project with user's access level
+export interface ProjectWithAccess extends Project {
+  user_access_level?: AccessLevel;
+}
+
+// Current user with permissions context
+export interface CurrentUser extends User {
+  permissions?: {
+    [projectId: string]: AccessLevel;
+  };
+}
+
+// OIDC types
+export interface OIDCConfig {
+  enabled: boolean;
+  issuer_url: string;
+  client_id: string;
+  has_client_secret: boolean;
+  scopes: string[];
+  auto_create_users: boolean;
+  admin_group: string;
+}
+
+export interface OIDCConfigUpdate {
+  enabled?: boolean;
+  issuer_url?: string;
+  client_id?: string;
+  client_secret?: string;
+  scopes?: string[];
+  auto_create_users?: boolean;
+  admin_group?: string;
+}
+
+export interface OIDCStatus {
+  enabled: boolean;
+  issuer_url?: string;
+}

frontend/vite.config.ts

@@ -1,3 +1,4 @@
+/// <reference types="vitest" />
 import { defineConfig } from 'vite'
 import react from '@vitejs/plugin-react'
 
@@ -9,5 +10,16 @@ export default defineConfig({
       '/health': 'http://localhost:8080',
       '/project': 'http://localhost:8080',
     }
+  },
+  test: {
+    globals: true,
+    environment: 'jsdom',
+    setupFiles: './src/test/setup.ts',
+    css: true,
+    coverage: {
+      provider: 'v8',
+      reporter: ['text', 'cobertura', 'html'],
+      reportsDirectory: './coverage',
+    },
   }
 })

helm/orchard/Chart.yaml

@@ -17,13 +17,13 @@ maintainers:
 dependencies:
   - name: postgresql
     version: "15.5.x"
-    repository: https://charts.bitnami.com/bitnami
+    repository: oci://deps.global.bsf.tools/registry-1.docker.io-helmoci/bitnamicharts
     condition: postgresql.enabled
   - name: minio
     version: "14.x.x"
-    repository: https://charts.bitnami.com/bitnami
+    repository: oci://deps.global.bsf.tools/registry-1.docker.io-helmoci/bitnamicharts
     condition: minio.enabled
   - name: redis
     version: "19.x.x"
-    repository: https://charts.bitnami.com/bitnami
+    repository: oci://deps.global.bsf.tools/registry-1.docker.io-helmoci/bitnamicharts
     condition: redis.enabled

helm/orchard/templates/_helpers.tpl

@@ -7,6 +7,7 @@ Expand the name of the chart.
 
 {{/*
 Create a default fully qualified app name.
+Appends "-server" to distinguish from subcharts (minio, postgresql, redis).
 */}}
 {{- define "orchard.fullname" -}}
 {{- if .Values.fullnameOverride }}
@@ -14,9 +15,9 @@ Create a default fully qualified app name.
 {{- else }}
 {{- $name := default .Chart.Name .Values.nameOverride }}
 {{- if contains $name .Release.Name }}
-{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- printf "%s-server" .Release.Name | trunc 63 | trimSuffix "-" }}
 {{- else }}
-{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- printf "%s-%s-server" .Release.Name $name | trunc 63 | trimSuffix "-" }}
 {{- end }}
 {{- end }}
 {{- end }}
@@ -76,6 +77,8 @@ PostgreSQL secret name
 {{- define "orchard.postgresql.secretName" -}}
 {{- if .Values.orchard.database.existingSecret }}
 {{- .Values.orchard.database.existingSecret }}
+{{- else if and .Values.orchard.database.secretsManager .Values.orchard.database.secretsManager.enabled }}
+{{- printf "%s-db-credentials" (include "orchard.fullname" .) }}
 {{- else if .Values.postgresql.enabled }}
 {{- printf "%s-postgresql" .Release.Name }}
 {{- else }}
@@ -89,6 +92,8 @@ PostgreSQL password key in secret
 {{- define "orchard.postgresql.passwordKey" -}}
 {{- if .Values.orchard.database.existingSecret -}}
 {{- .Values.orchard.database.existingSecretPasswordKey -}}
+{{- else if and .Values.orchard.database.secretsManager .Values.orchard.database.secretsManager.enabled -}}
+password
 {{- else if .Values.postgresql.enabled -}}
 password
 {{- else -}}

helm/orchard/templates/deployment.yaml

@@ -37,12 +37,26 @@ spec:
           image: "{{ .Values.initContainer.image.repository }}:{{ .Values.initContainer.image.tag }}"
           imagePullPolicy: {{ .Values.initContainer.image.pullPolicy }}
           command: ['sh', '-c', 'until nc -z {{ include "orchard.postgresql.host" . }} 5432; do echo waiting for database; sleep 2; done;']
+          resources:
+            limits:
+              cpu: 50m
+              memory: 32Mi
+            requests:
+              cpu: 10m
+              memory: 32Mi
         {{- end }}
         {{- if .Values.minio.enabled }}
         - name: wait-for-minio
           image: "{{ .Values.initContainer.image.repository }}:{{ .Values.initContainer.image.tag }}"
           imagePullPolicy: {{ .Values.initContainer.image.pullPolicy }}
           command: ['sh', '-c', 'until nc -z {{ .Release.Name }}-minio 9000; do echo waiting for minio; sleep 2; done;']
+          resources:
+            limits:
+              cpu: 50m
+              memory: 32Mi
+            requests:
+              cpu: 10m
+              memory: 32Mi
         {{- end }}
       containers:
         - name: {{ .Chart.Name }}
@@ -63,8 +77,16 @@ spec:
               value: {{ include "orchard.postgresql.host" . | quote }}
             - name: ORCHARD_DATABASE_PORT
               value: {{ .Values.orchard.database.port | quote }}
+            {{- if and .Values.orchard.database.secretsManager .Values.orchard.database.secretsManager.enabled }}
+            - name: ORCHARD_DATABASE_USER
+              valueFrom:
+                secretKeyRef:
+                  name: {{ include "orchard.postgresql.secretName" . }}
+                  key: username
+            {{- else }}
             - name: ORCHARD_DATABASE_USER
               value: {{ .Values.orchard.database.user | default .Values.postgresql.auth.username | quote }}
+            {{- end }}
             - name: ORCHARD_DATABASE_DBNAME
               value: {{ .Values.orchard.database.dbname | default .Values.postgresql.auth.database | quote }}
             - name: ORCHARD_DATABASE_SSLMODE
@@ -82,6 +104,7 @@ spec:
               value: {{ .Values.orchard.s3.bucket | quote }}
             - name: ORCHARD_S3_USE_PATH_STYLE
               value: {{ .Values.orchard.s3.usePathStyle | quote }}
+            {{- if or .Values.minio.enabled .Values.orchard.s3.existingSecret .Values.orchard.s3.accessKeyId }}
             - name: ORCHARD_S3_ACCESS_KEY_ID
               valueFrom:
                 secretKeyRef:
@@ -92,16 +115,38 @@ spec:
                 secretKeyRef:
                   name: {{ include "orchard.minio.secretName" . }}
                   key: {{ if .Values.minio.enabled }}root-password{{ else }}{{ .Values.orchard.s3.existingSecretSecretKeyKey }}{{ end }}
+            {{- end }}
             - name: ORCHARD_DOWNLOAD_MODE
               value: {{ .Values.orchard.download.mode | quote }}
             - name: ORCHARD_PRESIGNED_URL_EXPIRY
               value: {{ .Values.orchard.download.presignedUrlExpiry | quote }}
+            {{- if .Values.orchard.rateLimit }}
+            {{- if .Values.orchard.rateLimit.login }}
+            - name: ORCHARD_LOGIN_RATE_LIMIT
+              value: {{ .Values.orchard.rateLimit.login | quote }}
+            {{- end }}
+            {{- end }}
+          {{- if and .Values.orchard.database.secretsManager .Values.orchard.database.secretsManager.enabled }}
+          volumeMounts:
+            - name: db-secrets
+              mountPath: /mnt/secrets-store
+              readOnly: true
+          {{- end }}
           livenessProbe:
             {{- toYaml .Values.livenessProbe | nindent 12 }}
           readinessProbe:
             {{- toYaml .Values.readinessProbe | nindent 12 }}
           resources:
             {{- toYaml .Values.resources | nindent 12 }}
+      {{- if and .Values.orchard.database.secretsManager .Values.orchard.database.secretsManager.enabled }}
+      volumes:
+        - name: db-secrets
+          csi:
+            driver: secrets-store.csi.k8s.io
+            readOnly: true
+            volumeAttributes:
+              secretProviderClass: {{ include "orchard.fullname" . }}-db-secret
+      {{- end }}
       {{- with .Values.nodeSelector }}
       nodeSelector:
         {{- toYaml . | nindent 8 }}

helm/orchard/templates/secret-provider-class.yaml

@@ -0,0 +1,27 @@
+{{- if and .Values.orchard.database.secretsManager .Values.orchard.database.secretsManager.enabled }}
+apiVersion: secrets-store.csi.x-k8s.io/v1
+kind: SecretProviderClass
+metadata:
+  name: {{ include "orchard.fullname" . }}-db-secret
+  labels:
+    {{- include "orchard.labels" . | nindent 4 }}
+spec:
+  provider: aws
+  parameters:
+    objects: |
+      - objectName: "{{ .Values.orchard.database.secretsManager.secretArn }}"
+        objectType: "secretsmanager"
+        jmesPath:
+          - path: username
+            objectAlias: db-username
+          - path: password
+            objectAlias: db-password
+  secretObjects:
+    - secretName: {{ include "orchard.fullname" . }}-db-credentials
+      type: Opaque
+      data:
+        - objectName: db-username
+          key: username
+        - objectName: db-password
+          key: password
+{{- end }}

helm/orchard/values-dev.yaml

@@ -0,0 +1,219 @@
+# Values for feature branch deployments (ephemeral dev environments)
+# Hostnames are overridden by CI pipeline via --set flags
+replicaCount: 1
+
+image:
+  repository: registry.global.bsf.tools/esv/bsf/bsf-integration/orchard/orchard-mvp
+  pullPolicy: Always
+  tag: "latest"  # Overridden by CI
+
+imagePullSecrets:
+  - name: orchard-pull-secret
+
+initContainer:
+  image:
+    repository: containers.global.bsf.tools/busybox
+    tag: "1.36"
+    pullPolicy: IfNotPresent
+
+serviceAccount:
+  create: true
+  automount: true
+  annotations: {}
+  name: ""  # Auto-generated based on release name
+
+podAnnotations: {}
+podLabels: {}
+
+podSecurityContext: {}
+
+securityContext:
+  readOnlyRootFilesystem: false
+  runAsNonRoot: true
+  runAsUser: 1000
+
+service:
+  type: ClusterIP
+  port: 8080
+
+# Ingress - hostnames overridden by CI pipeline
+ingress:
+  enabled: true
+  className: "nginx"
+  annotations:
+    cert-manager.io/cluster-issuer: "letsencrypt"
+    nginx.ingress.kubernetes.io/proxy-body-size: "0"  # Disable body size limit for uploads
+  hosts:
+    - host: orchard-dev.common.global.bsf.tools  # Overridden by CI
+      paths:
+        - path: /
+          pathType: Prefix
+  tls:
+    - secretName: orchard-tls  # Overridden by CI
+      hosts:
+        - orchard-dev.common.global.bsf.tools  # Overridden by CI
+
+# Lighter resources for ephemeral environments
+# Note: memory requests must equal limits per cluster policy
+resources:
+  limits:
+    cpu: 250m
+    memory: 256Mi
+  requests:
+    cpu: 100m
+    memory: 256Mi
+
+livenessProbe:
+  httpGet:
+    path: /health
+    port: http
+  initialDelaySeconds: 10
+  periodSeconds: 10
+
+readinessProbe:
+  httpGet:
+    path: /health
+    port: http
+  initialDelaySeconds: 5
+  periodSeconds: 5
+
+autoscaling:
+  enabled: false
+
+nodeSelector: {}
+tolerations: []
+affinity: {}
+
+orchard:
+  server:
+    host: "0.0.0.0"
+    port: 8080
+
+  database:
+    host: ""
+    port: 5432
+    user: orchard
+    password: ""
+    dbname: orchard
+    sslmode: disable
+    existingSecret: ""
+    existingSecretPasswordKey: "password"
+
+  s3:
+    endpoint: ""
+    region: us-east-1
+    bucket: orchard-artifacts
+    accessKeyId: ""
+    secretAccessKey: ""
+    usePathStyle: true
+    existingSecret: ""
+    existingSecretAccessKeyKey: "access-key-id"
+    existingSecretSecretKeyKey: "secret-access-key"
+
+  download:
+    mode: "presigned"
+    presignedUrlExpiry: 3600
+
+  # Relaxed rate limits for dev/feature environments (allows integration tests to run)
+  rateLimit:
+    login: "1000/minute"  # Default is 5/minute, relaxed for CI integration tests
+
+# PostgreSQL - ephemeral, no persistence
+postgresql:
+  enabled: true
+  image:
+    registry: containers.global.bsf.tools
+    repository: bitnami/postgresql
+    tag: "15"
+    pullPolicy: IfNotPresent
+  auth:
+    username: orchard
+    password: orchard-password
+    database: orchard
+  primary:
+    persistence:
+      enabled: false
+    # Resources with memory requests = limits per cluster policy
+    resourcesPreset: "none"
+    resources:
+      limits:
+        cpu: 250m
+        memory: 256Mi
+      requests:
+        cpu: 100m
+        memory: 256Mi
+  # Volume permissions init container
+  volumePermissions:
+    resourcesPreset: "none"
+    resources:
+      limits:
+        cpu: 50m
+        memory: 64Mi
+      requests:
+        cpu: 10m
+        memory: 64Mi
+
+# MinIO - ephemeral, no persistence
+minio:
+  enabled: true
+  image:
+    registry: containers.global.bsf.tools
+    repository: bitnami/minio
+    tag: "latest"
+    pullPolicy: IfNotPresent
+  auth:
+    rootUser: minioadmin
+    rootPassword: minioadmin
+  defaultBuckets: "orchard-artifacts"
+  persistence:
+    enabled: false
+  # Resources with memory requests = limits per cluster policy
+  resourcesPreset: "none"  # Disable preset to use explicit resources
+  resources:
+    limits:
+      cpu: 250m
+      memory: 256Mi
+    requests:
+      cpu: 100m
+      memory: 256Mi
+  # Init container resources
+  defaultInitContainers:
+    volumePermissions:
+      resourcesPreset: "none"
+      resources:
+        limits:
+          cpu: 50m
+          memory: 64Mi
+        requests:
+          cpu: 10m
+          memory: 64Mi
+  # Provisioning job resources
+  provisioning:
+    resources:
+      limits:
+        cpu: 100m
+        memory: 128Mi
+      requests:
+        cpu: 50m
+        memory: 128Mi
+
+# MinIO ingress - hostname overridden by CI
+minioIngress:
+  enabled: true
+  className: "nginx"
+  annotations:
+    cert-manager.io/cluster-issuer: "letsencrypt"
+    nginx.ingress.kubernetes.io/proxy-body-size: "0"
+  host: "minio-dev.common.global.bsf.tools"  # Overridden by CI
+  tls:
+    enabled: true
+    secretName: minio-tls  # Overridden by CI
+
+redis:
+  enabled: false
+
+waitForDatabase: true
+
+global:
+  security:
+    allowInsecureImages: true

helm/orchard/values-external.yaml

@@ -1,58 +0,0 @@
-# Values for using external PostgreSQL and S3 storage
-# Use this when you have existing infrastructure
-
-replicaCount: 2
-
-image:
-  pullPolicy: Always
-
-# Disable subcharts - use external services
-postgresql:
-  enabled: false
-
-minio:
-  enabled: false
-
-redis:
-  enabled: false
-
-orchard:
-  database:
-    host: "your-postgres-host.example.com"
-    port: 5432
-    user: orchard
-    dbname: orchard
-    sslmode: require
-    # Option 1: Use existing secret
-    existingSecret: "my-postgres-secret"
-    existingSecretPasswordKey: "password"
-    # Option 2: Set password directly (not recommended)
-    # password: "your-password"
-
-  s3:
-    endpoint: "https://s3.amazonaws.com"
-    region: us-east-1
-    bucket: orchard-artifacts
-    usePathStyle: false
-    # Option 1: Use existing secret
-    existingSecret: "my-s3-secret"
-    existingSecretAccessKeyKey: "access-key-id"
-    existingSecretSecretKeyKey: "secret-access-key"
-    # Option 2: Set credentials directly (not recommended)
-    # accessKeyId: "your-access-key"
-    # secretAccessKey: "your-secret-key"
-
-ingress:
-  enabled: true
-  className: nginx
-  annotations:
-    cert-manager.io/cluster-issuer: letsencrypt-prod
-  hosts:
-    - host: orchard.example.com
-      paths:
-        - path: /
-          pathType: Prefix
-  tls:
-    - secretName: orchard-tls
-      hosts:
-        - orchard.example.com