Merge branch 'feature/store-sha256-checksums' into 'main'

Store SHA256 checksums with artifacts and add multiple hash support Closes #25 See merge request esv/bsf/bsf-integration/orchard/orchard-mvp!16
Store SHA256 checksums with artifacts and add multiple hash support
2025-12-15 14:47:31 -06:00 · 2025-12-15 14:47:30 -06:00 · 2025-12-15 14:00:32 -06:00 · 2025-12-15 14:00:32 -06:00 · 2025-12-15 11:30:07 -07:00 · 2025-12-15 11:30:07 -07:00
28 changed files with 2130 additions and 141 deletions
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,26 +1,21 @@
-stages:
-  - test
-  - build
-  - publish
-  # - deploy
+include:
+    - project: 'esv/bsf/pypi/prosper'
+      ref: v0.64.1
+      file: '/prosper/templates/projects/docker.yml'

 variables:
-  # Container registry settings
-  REGISTRY: ${CI_REGISTRY}
-  IMAGE_NAME: ${CI_REGISTRY_IMAGE}
-  # Buildah settings
-  STORAGE_DRIVER: vfs
-  BUILDAH_FORMAT: docker
-  BUILDAH_ISOLATION: chroot
+# renovate: datasource=gitlab-tags depName=esv/bsf/pypi/prosper versioning=semver registryUrl=https://gitlab.global.bsf.tools
+  PROSPER_VERSION: v0.64.1
+
+kics:
+  allow_failure: true
+
+hadolint:
+  allow_failure: true

-.buildah-base:
-  image: deps.global.bsf.tools/quay.io/buildah/stable:latest
-  before_script:
-    - buildah version
-    - buildah login -u ${CI_REGISTRY_USER} -p ${CI_REGISTRY_PASSWORD} ${CI_REGISTRY}

 # Run Python tests
-test:
+python_tests:
  stage: test
  image: deps.global.bsf.tools/docker/python:3.12-slim
  before_script:
@@ -29,47 +24,6 @@ test:
  script:
    - cd backend
    - python -m pytest -v || echo "No tests yet"
-  rules:
-    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
-    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
-
-# Build container image for merge requests (no push)
-build:
-  stage: build
-  extends: .buildah-base
-  script:
-    - |
-      buildah build \
-        --build-arg NPM_REGISTRY=https://deps.global.bsf.tools/artifactory/api/npm/registry.npmjs.org/ \
-        --tag ${IMAGE_NAME}:${CI_COMMIT_SHORT_SHA} \
-        --label org.opencontainers.image.source=${CI_PROJECT_URL} \
-        --label org.opencontainers.image.revision=${CI_COMMIT_SHA} \
-        --label org.opencontainers.image.created=$(date -u +%Y-%m-%dT%H:%M:%SZ) \
-        .
-  rules:
-    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
-
-# Build and push on main branch
-publish:
-  stage: publish
-  extends: .buildah-base
-  script:
-    - |
-      buildah build \
-        --build-arg NPM_REGISTRY=https://deps.global.bsf.tools/artifactory/api/npm/registry.npmjs.org/ \
-        --tag ${IMAGE_NAME}:${CI_COMMIT_SHORT_SHA} \
-        --tag ${IMAGE_NAME}:${CI_COMMIT_REF_SLUG} \
-        --tag ${IMAGE_NAME}:latest \
-        --label org.opencontainers.image.source=${CI_PROJECT_URL} \
-        --label org.opencontainers.image.revision=${CI_COMMIT_SHA} \
-        --label org.opencontainers.image.created=$(date -u +%Y-%m-%dT%H:%M:%SZ) \
-        .
-    - buildah push ${IMAGE_NAME}:${CI_COMMIT_SHORT_SHA}
-    - buildah push ${IMAGE_NAME}:${CI_COMMIT_REF_SLUG}
-    - buildah push ${IMAGE_NAME}:latest
-  rules:
-    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
-

 # deploy_helm_charts:
 #   stage: deploy
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -0,0 +1,39 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+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]
+### Added
+- Added integrity verification workflow design document (#24)
+- Added `sha256` field to API responses for clarity (alias of `id`) (#25)
+- Added `checksum_sha1` field to artifacts table for compatibility (#25)
+- Added `s3_etag` field to artifacts table for S3 verification (#25)
+- Compute and store MD5, SHA1, and S3 ETag alongside SHA256 during upload (#25)
+- Added `Dockerfile.local` and `docker-compose.local.yml` for local development (#25)
+- Added migration script `003_checksum_fields.sql` for existing databases (#25)
+
+## [0.2.0] - 2025-12-15
+### Changed
+- Updated images to use internal container BSF proxy (#46)
+### Added
+- Added `format` and `platform` fields to packages table (#16)
+- Added `checksum_md5` and `metadata` JSONB fields to artifacts table (#16)
+- Added `updated_at` field to tags table (#16)
+- Added `tag_name`, `user_agent`, `duration_ms`, `deduplicated`, `checksum_verified` fields to uploads table (#16)
+- Added `change_type` field to tag_history table (#16)
+- Added composite indexes for common query patterns (#16)
+- Added GIN indexes on JSONB fields for efficient JSON queries (#16)
+- Added partial index for public projects (#16)
+- Added database triggers for `updated_at` timestamps (#16)
+- Added database triggers for maintaining artifact `ref_count` accuracy (#16)
+- Added CHECK constraints for data integrity (`size > 0`, `ref_count >= 0`) (#16)
+- Added migration script `002_schema_enhancements.sql` for existing databases (#16)
+
+## [0.1.0] - 2025-12-12
+### Changed
+- Changed the Dockerfile npm build arg to use the deps.global.bsf.tools URL as the default registry (#45)
+### Added
+- Added Prosper docker template config (#45)
--- a/9
+++ b/9
@@ -1,7 +1,7 @@
 # Frontend build stage
-FROM node:20-alpine AS frontend-builder
+FROM containers.global.bsf.tools/node:20-alpine AS frontend-builder

-ARG NPM_REGISTRY
+ARG NPM_REGISTRY=https://deps.global.bsf.tools/artifactory/api/npm/registry.npmjs.org/

 WORKDIR /app/frontend

@@ -19,7 +19,10 @@ COPY frontend/ ./
 RUN npm run build

 # Runtime stage
-FROM python:3.12-slim
+FROM containers.global.bsf.tools/python:3.12-slim
+
+# 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

 # Install system dependencies
 RUN apt-get update && apt-get install -y --no-install-recommends \
--- a/Dockerfile.local
+++ b/Dockerfile.local
@@ -0,0 +1,50 @@
+# Frontend build stage
+FROM node:20-alpine AS frontend-builder
+
+WORKDIR /app/frontend
+
+# Copy package files
+COPY frontend/package*.json ./
+RUN npm install
+
+# Copy frontend source
+COPY frontend/ ./
+
+# Build frontend
+RUN npm run build
+
+# Runtime stage
+FROM python:3.12-slim
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create non-root user
+RUN groupadd -g 1000 orchard && \
+    useradd -u 1000 -g orchard -s /bin/bash -m orchard
+
+WORKDIR /app
+
+# Copy requirements and install Python dependencies
+COPY backend/requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy backend source
+COPY backend/ ./backend/
+
+# Copy frontend build
+COPY --from=frontend-builder /app/frontend/dist ./frontend/dist
+
+# Set ownership
+RUN chown -R orchard:orchard /app
+
+USER orchard
+
+EXPOSE 8080
+
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:8080/health || exit 1
+
+CMD ["uvicorn", "backend.app.main:app", "--host", "0.0.0.0", "--port", "8080"]
--- a/README.md
+++ b/README.md
@@ -275,14 +275,17 @@ curl -X POST http://localhost:8080/api/v1/project/my-project/releases/upload/abc
 ### Download an Artifact

 ```bash
-# By tag
-curl -O http://localhost:8080/api/v1/project/my-project/releases/+/v1.0.0
+# By tag (use -OJ to save with the correct filename from Content-Disposition header)
+curl -OJ http://localhost:8080/api/v1/project/my-project/releases/+/v1.0.0

 # By artifact ID
-curl -O http://localhost:8080/api/v1/project/my-project/releases/+/artifact:a3f5d8e12b4c6789...
+curl -OJ http://localhost:8080/api/v1/project/my-project/releases/+/artifact:a3f5d8e12b4c6789...

 # Using the short URL pattern
-curl -O http://localhost:8080/project/my-project/releases/+/latest
+curl -OJ http://localhost:8080/project/my-project/releases/+/latest
+
+# Save to a specific filename
+curl -o myfile.tar.gz http://localhost:8080/api/v1/project/my-project/releases/+/v1.0.0

 # Partial download (range request)
 curl -H "Range: bytes=0-1023" http://localhost:8080/api/v1/project/my-project/releases/+/v1.0.0
@@ -291,6 +294,12 @@ curl -H "Range: bytes=0-1023" http://localhost:8080/api/v1/project/my-project/re
 curl -I http://localhost:8080/api/v1/project/my-project/releases/+/v1.0.0
 ```

+> **Note on curl flags:**
+> - `-O` saves the file using the URL path as the filename (e.g., `latest`, `v1.0.0`)
+> - `-J` tells curl to use the filename from the `Content-Disposition` header (e.g., `app-v1.0.0.tar.gz`)
+> - `-OJ` combines both: download to a file using the server-provided filename
+> - `-o <filename>` saves to a specific filename you choose
+
 ### Create a Tag

 ```bash
--- a/backend/app/models.py
+++ b/backend/app/models.py
@@ -73,15 +73,33 @@ class Artifact(Base):
    size = Column(BigInteger, nullable=False)
    content_type = Column(String(255))
    original_name = Column(String(1024))
+    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')
    created_at = Column(DateTime(timezone=True), default=datetime.utcnow)
    created_by = Column(String(255), nullable=False)
    ref_count = Column(Integer, default=1)
    s3_key = Column(String(1024), nullable=False)
-    format_metadata = Column(JSON, default=dict)  # Format-specific metadata (version, etc.)

    tags = relationship("Tag", back_populates="artifact")
    uploads = relationship("Upload", back_populates="artifact")

+    @property
+    def sha256(self) -> str:
+        """Alias for id - the SHA256 hash of the artifact content"""
+        return self.id
+
+    @property
+    def format_metadata(self):
+        """Alias for artifact_metadata - backward compatibility"""
+        return self.artifact_metadata
+
+    @format_metadata.setter
+    def format_metadata(self, value):
+        """Alias setter for artifact_metadata - backward compatibility"""
+        self.artifact_metadata = value
+
    __table_args__ = (
        Index("idx_artifacts_created_at", "created_at"),
        Index("idx_artifacts_created_by", "created_by"),
@@ -99,6 +117,7 @@ class Tag(Base):
    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)
    created_by = Column(String(255), nullable=False)

    package = relationship("Package", back_populates="tags")
@@ -120,6 +139,7 @@ class TagHistory(Base):
    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")
    changed_at = Column(DateTime(timezone=True), default=datetime.utcnow)
    changed_by = Column(String(255), nullable=False)

@@ -127,6 +147,8 @@ 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"),
    )


@@ -137,6 +159,11 @@ class Upload(Base):
    artifact_id = Column(String(64), ForeignKey("artifacts.id"), nullable=False)
    package_id = Column(UUID(as_uuid=True), ForeignKey("packages.id"), nullable=False)
    original_name = Column(String(1024))
+    tag_name = Column(String(255))  # Tag assigned during upload
+    user_agent = Column(String(512))  # Client identification
+    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
    uploaded_at = Column(DateTime(timezone=True), default=datetime.utcnow)
    uploaded_by = Column(String(255), nullable=False)
    source_ip = Column(String(45))
@@ -148,6 +175,8 @@ class Upload(Base):
        Index("idx_uploads_artifact_id", "artifact_id"),
        Index("idx_uploads_package_id", "package_id"),
        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"),
    )


@@ -220,4 +249,6 @@ class AuditLog(Base):
        Index("idx_audit_logs_resource", "resource"),
        Index("idx_audit_logs_user_id", "user_id"),
        Index("idx_audit_logs_timestamp", "timestamp"),
+        Index("idx_audit_logs_resource_timestamp", "resource", "timestamp"),
+        Index("idx_audit_logs_user_timestamp", "user_id", "timestamp"),
    )
--- a/backend/app/routes.py
+++ b/backend/app/routes.py
@@ -28,6 +28,7 @@ from .schemas import (
    ResumableUploadCompleteRequest,
    ResumableUploadCompleteResponse,
    ResumableUploadStatusResponse,
+    GlobalSearchResponse, SearchResultProject, SearchResultPackage, SearchResultArtifact,
 )
 from .metadata import extract_metadata

@@ -51,32 +52,155 @@ def health_check():
    return HealthResponse(status="ok")


+# Global search
+@router.get("/api/v1/search", response_model=GlobalSearchResponse)
+def global_search(
+    request: Request,
+    q: str = Query(..., min_length=1, description="Search query"),
+    limit: int = Query(default=5, ge=1, le=20, description="Results per type"),
+    db: Session = Depends(get_db),
+):
+    """
+    Search across all entity types (projects, packages, artifacts/tags).
+    Returns limited results for each type plus total counts.
+    """
+    user_id = get_user_id(request)
+    search_lower = q.lower()
+
+    # Search projects (name and description)
+    project_query = db.query(Project).filter(
+        or_(Project.is_public == True, Project.created_by == user_id),
+        or_(
+            func.lower(Project.name).contains(search_lower),
+            func.lower(Project.description).contains(search_lower)
+        )
+    )
+    project_count = project_query.count()
+    projects = project_query.order_by(Project.name).limit(limit).all()
+
+    # Search packages (name and description) with project name
+    package_query = db.query(Package, Project.name.label("project_name")).join(
+        Project, Package.project_id == Project.id
+    ).filter(
+        or_(Project.is_public == True, Project.created_by == user_id),
+        or_(
+            func.lower(Package.name).contains(search_lower),
+            func.lower(Package.description).contains(search_lower)
+        )
+    )
+    package_count = package_query.count()
+    package_results = package_query.order_by(Package.name).limit(limit).all()
+
+    # Search tags/artifacts (tag name and original filename)
+    artifact_query = db.query(
+        Tag, Artifact, Package.name.label("package_name"), Project.name.label("project_name")
+    ).join(
+        Artifact, Tag.artifact_id == Artifact.id
+    ).join(
+        Package, Tag.package_id == Package.id
+    ).join(
+        Project, Package.project_id == Project.id
+    ).filter(
+        or_(Project.is_public == True, Project.created_by == user_id),
+        or_(
+            func.lower(Tag.name).contains(search_lower),
+            func.lower(Artifact.original_name).contains(search_lower)
+        )
+    )
+    artifact_count = artifact_query.count()
+    artifact_results = artifact_query.order_by(Tag.name).limit(limit).all()
+
+    return GlobalSearchResponse(
+        query=q,
+        projects=[SearchResultProject(
+            id=p.id,
+            name=p.name,
+            description=p.description,
+            is_public=p.is_public
+        ) for p in projects],
+        packages=[SearchResultPackage(
+            id=pkg.id,
+            project_id=pkg.project_id,
+            project_name=project_name,
+            name=pkg.name,
+            description=pkg.description,
+            format=pkg.format
+        ) for pkg, project_name in package_results],
+        artifacts=[SearchResultArtifact(
+            tag_id=tag.id,
+            tag_name=tag.name,
+            artifact_id=artifact.id,
+            package_id=tag.package_id,
+            package_name=package_name,
+            project_name=project_name,
+            original_name=artifact.original_name
+        ) for tag, artifact, package_name, project_name in artifact_results],
+        counts={
+            "projects": project_count,
+            "packages": package_count,
+            "artifacts": artifact_count,
+            "total": project_count + package_count + artifact_count
+        }
+    )
+
+
 # Project routes
@router.get("/api/v1/projects", response_model=PaginatedResponse[ProjectResponse])
 def list_projects(
    request: Request,
    page: int = Query(default=1, ge=1, description="Page number"),
    limit: int = Query(default=20, ge=1, le=100, description="Items per page"),
-    search: Optional[str] = Query(default=None, description="Search by project name"),
+    search: Optional[str] = Query(default=None, description="Search by project name or description"),
+    visibility: Optional[str] = Query(default=None, description="Filter by visibility (public, private)"),
+    sort: str = Query(default="name", description="Sort field (name, created_at, updated_at)"),
+    order: str = Query(default="asc", description="Sort order (asc, desc)"),
    db: Session = Depends(get_db),
 ):
    user_id = get_user_id(request)

+    # Validate sort field
+    valid_sort_fields = {"name": Project.name, "created_at": Project.created_at, "updated_at": Project.updated_at}
+    if sort not in valid_sort_fields:
+        raise HTTPException(status_code=400, detail=f"Invalid sort field. Must be one of: {', '.join(valid_sort_fields.keys())}")
+
+    # Validate order
+    if order not in ("asc", "desc"):
+        raise HTTPException(status_code=400, detail="Invalid order. Must be 'asc' or 'desc'")
+
    # Base query - filter by access
    query = db.query(Project).filter(
        or_(Project.is_public == True, Project.created_by == user_id)
    )

-    # Apply search filter (case-insensitive)
+    # Apply visibility filter
+    if visibility == "public":
+        query = query.filter(Project.is_public == True)
+    elif visibility == "private":
+        query = query.filter(Project.is_public == False, Project.created_by == user_id)
+
+    # Apply search filter (case-insensitive on name and description)
    if search:
-        query = query.filter(func.lower(Project.name).contains(search.lower()))
+        search_lower = search.lower()
+        query = query.filter(
+            or_(
+                func.lower(Project.name).contains(search_lower),
+                func.lower(Project.description).contains(search_lower)
+            )
+        )

    # Get total count before pagination
    total = query.count()

+    # Apply sorting
+    sort_column = valid_sort_fields[sort]
+    if order == "desc":
+        query = query.order_by(sort_column.desc())
+    else:
+        query = query.order_by(sort_column.asc())
+
    # Apply pagination
    offset = (page - 1) * limit
-    projects = query.order_by(Project.name).offset(offset).limit(limit).all()
+    projects = query.offset(offset).limit(limit).all()

    # Calculate total pages
    total_pages = math.ceil(total / limit) if total > 0 else 1
@@ -396,40 +520,51 @@ def upload_artifact(
        )

    # Store file (uses multipart for large files)
-    sha256_hash, size, s3_key = storage.store(file.file, content_length)
+    storage_result = storage.store(file.file, content_length)

    # Check if this is a deduplicated upload
    deduplicated = False

    # Create or update artifact record
-    artifact = db.query(Artifact).filter(Artifact.id == sha256_hash).first()
+    artifact = db.query(Artifact).filter(Artifact.id == storage_result.sha256).first()
    if artifact:
        artifact.ref_count += 1
        deduplicated = True
        # Merge metadata if new metadata was extracted
-        if file_metadata and artifact.format_metadata:
-            artifact.format_metadata = {**artifact.format_metadata, **file_metadata}
+        if file_metadata and artifact.artifact_metadata:
+            artifact.artifact_metadata = {**artifact.artifact_metadata, **file_metadata}
        elif file_metadata:
-            artifact.format_metadata = file_metadata
+            artifact.artifact_metadata = file_metadata
+        # Update checksums if not already set
+        if not artifact.checksum_md5 and storage_result.md5:
+            artifact.checksum_md5 = storage_result.md5
+        if not artifact.checksum_sha1 and storage_result.sha1:
+            artifact.checksum_sha1 = storage_result.sha1
+        if not artifact.s3_etag and storage_result.s3_etag:
+            artifact.s3_etag = storage_result.s3_etag
    else:
        artifact = Artifact(
-            id=sha256_hash,
-            size=size,
+            id=storage_result.sha256,
+            size=storage_result.size,
            content_type=file.content_type,
            original_name=file.filename,
+            checksum_md5=storage_result.md5,
+            checksum_sha1=storage_result.sha1,
+            s3_etag=storage_result.s3_etag,
            created_by=user_id,
-            s3_key=s3_key,
-            format_metadata=file_metadata or {},
+            s3_key=storage_result.s3_key,
+            artifact_metadata=file_metadata or {},
        )
        db.add(artifact)

    # Record upload
    upload = Upload(
-        artifact_id=sha256_hash,
+        artifact_id=storage_result.sha256,
        package_id=package.id,
        original_name=file.filename,
        uploaded_by=user_id,
        source_ip=request.client.host if request.client else None,
+        deduplicated=deduplicated,
    )
    db.add(upload)

@@ -437,13 +572,13 @@ def upload_artifact(
    if tag:
        existing_tag = db.query(Tag).filter(Tag.package_id == package.id, Tag.name == tag).first()
        if existing_tag:
-            existing_tag.artifact_id = sha256_hash
+            existing_tag.artifact_id = storage_result.sha256
            existing_tag.created_by = user_id
        else:
            new_tag = Tag(
                package_id=package.id,
                name=tag,
-                artifact_id=sha256_hash,
+                artifact_id=storage_result.sha256,
                created_by=user_id,
            )
            db.add(new_tag)
@@ -451,12 +586,16 @@ def upload_artifact(
    db.commit()

    return UploadResponse(
-        artifact_id=sha256_hash,
-        size=size,
+        artifact_id=storage_result.sha256,
+        sha256=storage_result.sha256,
+        size=storage_result.size,
        project=project_name,
        package=package_name,
        tag=tag,
-        format_metadata=artifact.format_metadata,
+        checksum_md5=storage_result.md5,
+        checksum_sha1=storage_result.sha1,
+        s3_etag=storage_result.s3_etag,
+        format_metadata=artifact.artifact_metadata,
        deduplicated=deduplicated,
    )

@@ -882,9 +1021,15 @@ def list_tags(
    # Base query with JOIN to artifact for metadata
    query = db.query(Tag, Artifact).join(Artifact, Tag.artifact_id == Artifact.id).filter(Tag.package_id == package.id)

-    # Apply search filter (case-insensitive on tag name)
+    # Apply search filter (case-insensitive on tag name OR artifact original filename)
    if search:
-        query = query.filter(func.lower(Tag.name).contains(search.lower()))
+        search_lower = search.lower()
+        query = query.filter(
+            or_(
+                func.lower(Tag.name).contains(search_lower),
+                func.lower(Artifact.original_name).contains(search_lower)
+            )
+        )

    # Get total count before pagination
    total = query.count()
--- a/backend/app/schemas.py
+++ b/backend/app/schemas.py
@@ -99,9 +99,13 @@ class PackageDetailResponse(BaseModel):
 # Artifact schemas
 class ArtifactResponse(BaseModel):
    id: str
+    sha256: str  # Explicit SHA256 field (same as id)
    size: int
    content_type: Optional[str]
    original_name: Optional[str]
+    checksum_md5: Optional[str] = None
+    checksum_sha1: Optional[str] = None
+    s3_etag: Optional[str] = None
    created_at: datetime
    created_by: str
    ref_count: int
@@ -173,9 +177,13 @@ class ArtifactTagInfo(BaseModel):
 class ArtifactDetailResponse(BaseModel):
    """Artifact with list of tags/packages referencing it"""
    id: str
+    sha256: str  # Explicit SHA256 field (same as id)
    size: int
    content_type: Optional[str]
    original_name: Optional[str]
+    checksum_md5: Optional[str] = None
+    checksum_sha1: Optional[str] = None
+    s3_etag: Optional[str] = None
    created_at: datetime
    created_by: str
    ref_count: int
@@ -189,9 +197,13 @@ class ArtifactDetailResponse(BaseModel):
 class PackageArtifactResponse(BaseModel):
    """Artifact with tags for package artifact listing"""
    id: str
+    sha256: str  # Explicit SHA256 field (same as id)
    size: int
    content_type: Optional[str]
    original_name: Optional[str]
+    checksum_md5: Optional[str] = None
+    checksum_sha1: Optional[str] = None
+    s3_etag: Optional[str] = None
    created_at: datetime
    created_by: str
    format_metadata: Optional[Dict[str, Any]] = None
@@ -204,10 +216,14 @@ class PackageArtifactResponse(BaseModel):
 # Upload response
 class UploadResponse(BaseModel):
    artifact_id: str
+    sha256: str  # Explicit SHA256 field (same as artifact_id)
    size: int
    project: str
    package: str
    tag: Optional[str]
+    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

@@ -269,6 +285,51 @@ class ConsumerResponse(BaseModel):
        from_attributes = True


+# Global search schemas
+class SearchResultProject(BaseModel):
+    """Project result for global search"""
+    id: UUID
+    name: str
+    description: Optional[str]
+    is_public: bool
+
+    class Config:
+        from_attributes = True
+
+
+class SearchResultPackage(BaseModel):
+    """Package result for global search"""
+    id: UUID
+    project_id: UUID
+    project_name: str
+    name: str
+    description: Optional[str]
+    format: str
+
+    class Config:
+        from_attributes = True
+
+
+class SearchResultArtifact(BaseModel):
+    """Artifact/tag result for global search"""
+    tag_id: UUID
+    tag_name: str
+    artifact_id: str
+    package_id: UUID
+    package_name: str
+    project_name: str
+    original_name: Optional[str]
+
+
+class GlobalSearchResponse(BaseModel):
+    """Combined search results across all entity types"""
+    query: str
+    projects: List[SearchResultProject]
+    packages: List[SearchResultPackage]
+    artifacts: List[SearchResultArtifact]
+    counts: Dict[str, int]  # Total counts for each type
+
+
 # Health check
 class HealthResponse(BaseModel):
    status: str
--- a/backend/app/storage.py
+++ b/backend/app/storage.py
@@ -1,6 +1,6 @@
 import hashlib
 import logging
-from typing import BinaryIO, Tuple, Optional, Dict, Any, Generator
+from typing import BinaryIO, Tuple, Optional, Dict, Any, Generator, NamedTuple
 import boto3
 from botocore.config import Config
 from botocore.exceptions import ClientError
@@ -18,6 +18,16 @@ MULTIPART_CHUNK_SIZE = 10 * 1024 * 1024
 HASH_CHUNK_SIZE = 8 * 1024 * 1024


+class StorageResult(NamedTuple):
+    """Result of storing a file with all computed checksums"""
+    sha256: str
+    size: int
+    s3_key: str
+    md5: Optional[str] = None
+    sha1: Optional[str] = None
+    s3_etag: Optional[str] = None
+
+
 class S3Storage:
    def __init__(self):
        config = Config(s3={"addressing_style": "path"} if settings.s3_use_path_style else {})
@@ -34,9 +44,9 @@ class S3Storage:
        # Store active multipart uploads for resumable support
        self._active_uploads: Dict[str, Dict[str, Any]] = {}

-    def store(self, file: BinaryIO, content_length: Optional[int] = None) -> Tuple[str, int, str]:
+    def store(self, file: BinaryIO, content_length: Optional[int] = None) -> StorageResult:
        """
-        Store a file and return its SHA256 hash, size, and s3_key.
+        Store a file and return StorageResult with all checksums.
        Content-addressable: if the file already exists, just return the hash.
        Uses multipart upload for files larger than MULTIPART_THRESHOLD.
        """
@@ -46,45 +56,76 @@ class S3Storage:
        else:
            return self._store_multipart(file, content_length)

-    def _store_simple(self, file: BinaryIO) -> Tuple[str, int, str]:
+    def _store_simple(self, file: BinaryIO) -> StorageResult:
        """Store a small file using simple put_object"""
-        # Read file and compute hash
+        # Read file and compute all hashes
        content = file.read()
        sha256_hash = hashlib.sha256(content).hexdigest()
+        md5_hash = hashlib.md5(content).hexdigest()
+        sha1_hash = hashlib.sha1(content).hexdigest()
        size = len(content)

        # Check if already exists
        s3_key = f"fruits/{sha256_hash[:2]}/{sha256_hash[2:4]}/{sha256_hash}"
+        s3_etag = None

        if not self._exists(s3_key):
-            self.client.put_object(
+            response = self.client.put_object(
                Bucket=self.bucket,
                Key=s3_key,
                Body=content,
            )
+            s3_etag = response.get("ETag", "").strip('"')
+        else:
+            # Get existing ETag
+            obj_info = self.get_object_info(s3_key)
+            if obj_info:
+                s3_etag = obj_info.get("etag", "").strip('"')

-        return sha256_hash, size, s3_key
+        return StorageResult(
+            sha256=sha256_hash,
+            size=size,
+            s3_key=s3_key,
+            md5=md5_hash,
+            sha1=sha1_hash,
+            s3_etag=s3_etag,
+        )

-    def _store_multipart(self, file: BinaryIO, content_length: int) -> Tuple[str, int, str]:
+    def _store_multipart(self, file: BinaryIO, content_length: int) -> StorageResult:
        """Store a large file using S3 multipart upload with streaming hash computation"""
-        # First pass: compute hash by streaming through file
-        hasher = hashlib.sha256()
+        # First pass: compute all hashes by streaming through file
+        sha256_hasher = hashlib.sha256()
+        md5_hasher = hashlib.md5()
+        sha1_hasher = hashlib.sha1()
        size = 0

-        # Read file in chunks to compute hash
+        # Read file in chunks to compute hashes
        while True:
            chunk = file.read(HASH_CHUNK_SIZE)
            if not chunk:
                break
-            hasher.update(chunk)
+            sha256_hasher.update(chunk)
+            md5_hasher.update(chunk)
+            sha1_hasher.update(chunk)
            size += len(chunk)

-        sha256_hash = hasher.hexdigest()
+        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}"

        # Check if already exists (deduplication)
        if self._exists(s3_key):
-            return sha256_hash, size, 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,
+            )

        # Seek back to start for upload
        file.seek(0)
@@ -116,14 +157,22 @@ class S3Storage:
                part_number += 1

            # Complete multipart upload
-            self.client.complete_multipart_upload(
+            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('"')

-            return sha256_hash, size, s3_key
+            return StorageResult(
+                sha256=sha256_hash,
+                size=size,
+                s3_key=s3_key,
+                md5=md5_hash,
+                sha1=sha1_hash,
+                s3_etag=s3_etag,
+            )

        except Exception as e:
            # Abort multipart upload on failure
@@ -135,33 +184,50 @@ class S3Storage:
            )
            raise

-    def store_streaming(self, chunks: Generator[bytes, None, None]) -> Tuple[str, int, str]:
+    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 hash
-        hasher = hashlib.sha256()
+        # 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:
-            hasher.update(chunk)
+            sha256_hasher.update(chunk)
+            md5_hasher.update(chunk)
+            sha1_hasher.update(chunk)
            all_chunks.append(chunk)
            size += len(chunk)

-        sha256_hash = hasher.hexdigest()
+        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):
-            return sha256_hash, size, 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)
-            self.client.put_object(Bucket=self.bucket, Key=s3_key, Body=content)
+            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)
@@ -205,12 +271,13 @@ class S3Storage:
                        "ETag": response["ETag"],
                    })

-                self.client.complete_multipart_upload(
+                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}")
@@ -221,7 +288,14 @@ class S3Storage:
                )
                raise

-        return sha256_hash, size, s3_key
+        return StorageResult(
+            sha256=sha256_hash,
+            size=size,
+            s3_key=s3_key,
+            md5=md5_hash,
+            sha1=sha1_hash,
+            s3_etag=s3_etag,
+        )

    def initiate_resumable_upload(self, expected_hash: str) -> Dict[str, Any]:
        """
--- a/container-test.sh
+++ b/container-test.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+echo "testing container"
+
+# Without a sleep, local testing shows no output because attaching to the logs happens after the container is done executing
+# this script.
+sleep 1
--- a/docker-compose.local.yml
+++ b/docker-compose.local.yml
@@ -0,0 +1,122 @@
+version: '3.8'
+
+services:
+  orchard-server:
+    build:
+      context: .
+      dockerfile: Dockerfile.local
+    ports:
+      - "8080:8080"
+    environment:
+      - ORCHARD_SERVER_HOST=0.0.0.0
+      - ORCHARD_SERVER_PORT=8080
+      - ORCHARD_DATABASE_HOST=postgres
+      - ORCHARD_DATABASE_PORT=5432
+      - ORCHARD_DATABASE_USER=orchard
+      - ORCHARD_DATABASE_PASSWORD=orchard_secret
+      - ORCHARD_DATABASE_DBNAME=orchard
+      - ORCHARD_DATABASE_SSLMODE=disable
+      - ORCHARD_S3_ENDPOINT=http://minio:9000
+      - ORCHARD_S3_REGION=us-east-1
+      - ORCHARD_S3_BUCKET=orchard-artifacts
+      - ORCHARD_S3_ACCESS_KEY_ID=minioadmin
+      - ORCHARD_S3_SECRET_ACCESS_KEY=minioadmin
+      - ORCHARD_S3_USE_PATH_STYLE=true
+      - ORCHARD_REDIS_HOST=redis
+      - ORCHARD_REDIS_PORT=6379
+    depends_on:
+      postgres:
+        condition: service_healthy
+      minio:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+    networks:
+      - orchard-network
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/health"]
+      interval: 30s
+      timeout: 3s
+      start_period: 10s
+      retries: 3
+
+  postgres:
+    image: postgres:16-alpine
+    environment:
+      - POSTGRES_USER=orchard
+      - POSTGRES_PASSWORD=orchard_secret
+      - POSTGRES_DB=orchard
+    volumes:
+      - postgres-data-local:/var/lib/postgresql/data
+      - ./migrations:/docker-entrypoint-initdb.d:ro
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U orchard -d orchard"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    networks:
+      - orchard-network
+    restart: unless-stopped
+
+  minio:
+    image: minio/minio:latest
+    command: server /data --console-address ":9001"
+    environment:
+      - MINIO_ROOT_USER=minioadmin
+      - MINIO_ROOT_PASSWORD=minioadmin
+    volumes:
+      - minio-data-local:/data
+    ports:
+      - "9000:9000"
+      - "9001:9001"
+    healthcheck:
+      test: ["CMD", "mc", "ready", "local"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    networks:
+      - orchard-network
+    restart: unless-stopped
+
+  minio-init:
+    image: minio/mc:latest
+    depends_on:
+      minio:
+        condition: service_healthy
+    entrypoint: >
+      /bin/sh -c "
+      mc alias set myminio http://minio:9000 minioadmin minioadmin;
+      mc mb myminio/orchard-artifacts --ignore-existing;
+      mc anonymous set download myminio/orchard-artifacts;
+      exit 0;
+      "
+    networks:
+      - orchard-network
+
+  redis:
+    image: redis:7-alpine
+    command: redis-server --appendonly yes
+    volumes:
+      - redis-data-local:/data
+    ports:
+      - "6379:6379"
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+    networks:
+      - orchard-network
+    restart: unless-stopped
+
+volumes:
+  postgres-data-local:
+  minio-data-local:
+  redis-data-local:
+
+networks:
+  orchard-network:
+    driver: bridge
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -36,7 +36,7 @@ services:
    restart: unless-stopped

  postgres:
-    image: postgres:16-alpine
+    image: containers.global.bsf.tools/postgres:16-alpine
    environment:
      - POSTGRES_USER=orchard
      - POSTGRES_PASSWORD=orchard_secret
@@ -56,7 +56,7 @@ services:
    restart: unless-stopped

  minio:
-    image: minio/minio:latest
+    image: containers.global.bsf.tools/minio/minio:latest
    command: server /data --console-address ":9001"
    environment:
      - MINIO_ROOT_USER=minioadmin
@@ -76,7 +76,7 @@ services:
    restart: unless-stopped

  minio-init:
-    image: minio/mc:latest
+    image: containers.global.bsf.tools/minio/mc:latest
    depends_on:
      minio:
        condition: service_healthy
@@ -91,7 +91,7 @@ services:
      - orchard-network

  redis:
-    image: redis:7-alpine
+    image: containers.global.bsf.tools/redis:7-alpine
    command: redis-server --appendonly yes
    volumes:
      - redis-data:/data
--- a/docs/design/integrity-verification.md
+++ b/docs/design/integrity-verification.md
@@ -0,0 +1,504 @@
+# Integrity Verification Workflow Design
+
+This document defines the process for SHA256 checksum verification on artifact downloads, including failure handling and retry mechanisms.
+
+## Overview
+
+Orchard uses content-addressable storage where the artifact ID is the SHA256 hash of the content. This design leverages that property to provide configurable integrity verification during downloads.
+
+## Current State
+
+| Aspect | Status |
+|--------|--------|
+| Download streams content directly from S3 | ✅ Implemented |
+| Artifact ID is the SHA256 hash | ✅ Implemented |
+| S3 key derived from SHA256 hash | ✅ Implemented |
+| Verification during download | ❌ Not implemented |
+| Checksum headers in response | ❌ Not implemented |
+| Retry mechanism on failure | ❌ Not implemented |
+| Failure handling beyond S3 errors | ❌ Not implemented |
+
+## Verification Modes
+
+The verification mode is selected via query parameter `?verify=<mode>` or server-wide default via `ORCHARD_VERIFY_MODE`.
+
+| Mode | Performance | Integrity | Use Case |
+|------|-------------|-----------|----------|
+| `none` | ⚡ Fastest | Client-side | Trusted networks, high throughput |
+| `header` | ⚡ Fast | Client-side | Standard downloads, client verification |
+| `stream` | 🔄 Moderate | Post-hoc server | Logging/auditing, non-blocking |
+| `pre` | 🐢 Slower | Guaranteed | Critical downloads, untrusted storage |
+| `strict` | 🐢 Slower | Guaranteed + Alert | Security-sensitive, compliance |
+
+### Mode: None (Default)
+
+**Behavior:**
+- Stream content directly from S3 with no server-side processing
+- Maximum download performance
+- Client is responsible for verification
+
+**Headers Returned:**
+```
+X-Checksum-SHA256: <expected_hash>
+Content-Length: <expected_size>
+```
+
+**Flow:**
+```
+Client Request → Lookup Artifact → Stream from S3 → Client
+```
+
+### Mode: Header
+
+**Behavior:**
+- Stream content directly from S3
+- Include comprehensive checksum headers
+- Client performs verification using headers
+
+**Headers Returned:**
+```
+X-Checksum-SHA256: <expected_hash>
+Content-Length: <expected_size>
+Digest: sha-256=<base64_encoded_hash>
+ETag: "<sha256_hash>"
+X-Content-SHA256: <expected_hash>
+```
+
+**Flow:**
+```
+Client Request → Lookup Artifact → Add Headers → Stream from S3 → Client Verifies
+```
+
+**Client Verification Example:**
+```bash
+# Download and verify
+curl -OJ https://orchard/project/foo/bar/+/v1.0.0
+EXPECTED=$(curl -sI https://orchard/project/foo/bar/+/v1.0.0 | grep X-Checksum-SHA256 | cut -d' ' -f2)
+ACTUAL=$(sha256sum downloaded_file | cut -d' ' -f1)
+[ "$EXPECTED" = "$ACTUAL" ] && echo "OK" || echo "MISMATCH"
+```
+
+### Mode: Stream (Post-Hoc Verification)
+
+**Behavior:**
+- Wrap S3 stream with `HashingStreamWrapper`
+- Compute SHA256 incrementally while streaming to client
+- Verify hash after stream completes
+- Log verification result
+- Cannot reject content (already sent to client)
+
+**Headers Returned:**
+```
+X-Checksum-SHA256: <expected_hash>
+Content-Length: <expected_size>
+X-Verify-Mode: stream
+Trailer: X-Verified
+```
+
+**Trailers (if client supports):**
+```
+X-Verified: true|false
+X-Computed-SHA256: <computed_hash>
+```
+
+**Flow:**
+```
+Client Request → Lookup Artifact → Wrap Stream → Stream to Client
+                                       ↓
+                              Compute Hash Incrementally
+                                       ↓
+                              Verify After Complete → Log Result
+```
+
+**Implementation:**
+```python
+class HashingStreamWrapper:
+    def __init__(self, stream, expected_hash: str, on_complete: Callable):
+        self.stream = stream
+        self.hasher = hashlib.sha256()
+        self.expected_hash = expected_hash
+        self.on_complete = on_complete
+
+    def __iter__(self):
+        for chunk in self.stream:
+            self.hasher.update(chunk)
+            yield chunk
+        # Stream complete, verify
+        computed = self.hasher.hexdigest()
+        self.on_complete(computed == self.expected_hash, computed)
+```
+
+### Mode: Pre-Verify (Blocking)
+
+**Behavior:**
+- Download entire content from S3 to memory/temp file
+- Compute SHA256 hash before sending to client
+- On match: stream verified content to client
+- On mismatch: retry from S3 (up to N times)
+- If retries exhausted: return 500 error
+
+**Headers Returned:**
+```
+X-Checksum-SHA256: <expected_hash>
+Content-Length: <expected_size>
+X-Verify-Mode: pre
+X-Verified: true
+```
+
+**Flow:**
+```
+Client Request → Lookup Artifact → Download from S3 → Compute Hash
+                                                          ↓
+                                                    Hash Matches?
+                                                    ↓           ↓
+                                                   Yes          No
+                                                    ↓           ↓
+                                            Stream to Client   Retry?
+                                                                ↓
+                                                          Yes → Loop
+                                                          No  → 500 Error
+```
+
+**Memory Considerations:**
+- For files < `ORCHARD_VERIFY_MEMORY_LIMIT` (default 100MB): buffer in memory
+- For larger files: use temporary file with streaming hash computation
+- Cleanup temp files after response sent
+
+### Mode: Strict
+
+**Behavior:**
+- Same as pre-verify but with no retries
+- Fail immediately on any mismatch
+- Quarantine artifact on failure (mark as potentially corrupted)
+- Trigger alert/notification on failure
+- For security-critical downloads
+
+**Headers Returned (on success):**
+```
+X-Checksum-SHA256: <expected_hash>
+Content-Length: <expected_size>
+X-Verify-Mode: strict
+X-Verified: true
+```
+
+**Error Response (on failure):**
+```json
+{
+  "error": "integrity_verification_failed",
+  "message": "Artifact content does not match expected checksum",
+  "expected_hash": "<expected>",
+  "computed_hash": "<computed>",
+  "artifact_id": "<id>",
+  "action_taken": "quarantined"
+}
+```
+
+**Quarantine Process:**
+1. Mark artifact `status = 'quarantined'` in database
+2. Log security event to audit_logs
+3. Optionally notify via webhook/email
+4. Artifact becomes unavailable for download until resolved
+
+## Failure Detection
+
+### Failure Types
+
+| Failure Type | Detection Method | Severity |
+|--------------|------------------|----------|
+| Hash mismatch | Computed SHA256 ≠ Expected | Critical |
+| Size mismatch | Actual bytes ≠ `Content-Length` | High |
+| S3 read error | boto3 exception | Medium |
+| Truncated content | Stream ends early | High |
+| S3 object missing | `NoSuchKey` error | Critical |
+| ETag mismatch | S3 ETag ≠ expected | Medium |
+
+### Detection Implementation
+
+```python
+class VerificationResult:
+    success: bool
+    failure_type: Optional[str]  # hash_mismatch, size_mismatch, etc.
+    expected_hash: str
+    computed_hash: Optional[str]
+    expected_size: int
+    actual_size: Optional[int]
+    error_message: Optional[str]
+    retry_count: int
+```
+
+## Retry Mechanism
+
+### Configuration
+
+| Environment Variable | Default | Description |
+|---------------------|---------|-------------|
+| `ORCHARD_VERIFY_MAX_RETRIES` | 3 | Maximum retry attempts |
+| `ORCHARD_VERIFY_RETRY_DELAY_MS` | 100 | Base delay between retries |
+| `ORCHARD_VERIFY_RETRY_BACKOFF` | 2.0 | Exponential backoff multiplier |
+| `ORCHARD_VERIFY_RETRY_MAX_DELAY_MS` | 5000 | Maximum delay cap |
+
+### Backoff Formula
+
+```
+delay = min(base_delay * (backoff ^ attempt), max_delay)
+```
+
+Example with defaults:
+- Attempt 1: 100ms
+- Attempt 2: 200ms
+- Attempt 3: 400ms
+
+### Retry Flow
+
+```python
+async def download_with_retry(artifact, max_retries=3):
+    for attempt in range(max_retries + 1):
+        try:
+            content = await fetch_from_s3(artifact.s3_key)
+            computed_hash = compute_sha256(content)
+
+            if computed_hash == artifact.id:
+                return content  # Success
+
+            # Hash mismatch
+            log.warning(f"Verification failed, attempt {attempt + 1}/{max_retries + 1}")
+
+            if attempt < max_retries:
+                delay = calculate_backoff(attempt)
+                await asyncio.sleep(delay / 1000)
+            else:
+                raise IntegrityError("Max retries exceeded")
+
+        except S3Error as e:
+            if attempt < max_retries:
+                delay = calculate_backoff(attempt)
+                await asyncio.sleep(delay / 1000)
+            else:
+                raise
+```
+
+### Retryable vs Non-Retryable Failures
+
+**Retryable:**
+- S3 read timeout
+- S3 connection error
+- Hash mismatch (may be transient S3 issue)
+- Truncated content
+
+**Non-Retryable:**
+- S3 object not found (404)
+- S3 access denied (403)
+- Artifact not in database
+- Strict mode failures
+
+## Configuration Reference
+
+### Environment Variables
+
+```bash
+# Verification mode (none, header, stream, pre, strict)
+ORCHARD_VERIFY_MODE=none
+
+# Retry settings
+ORCHARD_VERIFY_MAX_RETRIES=3
+ORCHARD_VERIFY_RETRY_DELAY_MS=100
+ORCHARD_VERIFY_RETRY_BACKOFF=2.0
+ORCHARD_VERIFY_RETRY_MAX_DELAY_MS=5000
+
+# Memory limit for pre-verify buffering (bytes)
+ORCHARD_VERIFY_MEMORY_LIMIT=104857600  # 100MB
+
+# Strict mode settings
+ORCHARD_VERIFY_QUARANTINE_ON_FAILURE=true
+ORCHARD_VERIFY_ALERT_WEBHOOK=https://alerts.example.com/webhook
+
+# Allow per-request mode override
+ORCHARD_VERIFY_ALLOW_OVERRIDE=true
+```
+
+### Per-Request Override
+
+When `ORCHARD_VERIFY_ALLOW_OVERRIDE=true`, clients can specify verification mode:
+
+```
+GET /api/v1/project/foo/bar/+/v1.0.0?verify=pre
+GET /api/v1/project/foo/bar/+/v1.0.0?verify=none
+```
+
+## API Changes
+
+### Download Endpoint
+
+**Request:**
+```
+GET /api/v1/project/{project}/{package}/+/{ref}?verify={mode}
+```
+
+**New Query Parameters:**
+| Parameter | Type | Default | Description |
+|-----------|------|---------|-------------|
+| `verify` | string | from config | Verification mode |
+
+**New Response Headers:**
+| Header | Description |
+|--------|-------------|
+| `X-Checksum-SHA256` | Expected SHA256 hash |
+| `X-Verify-Mode` | Active verification mode |
+| `X-Verified` | `true` if server verified content |
+| `Digest` | RFC 3230 digest header |
+
+### New Endpoint: Verify Artifact
+
+**Request:**
+```
+POST /api/v1/project/{project}/{package}/+/{ref}/verify
+```
+
+**Response:**
+```json
+{
+  "artifact_id": "abc123...",
+  "verified": true,
+  "expected_hash": "abc123...",
+  "computed_hash": "abc123...",
+  "size_match": true,
+  "expected_size": 1048576,
+  "actual_size": 1048576,
+  "verification_time_ms": 45
+}
+```
+
+## Logging and Monitoring
+
+### Log Events
+
+| Event | Level | When |
+|-------|-------|------|
+| `verification.success` | INFO | Hash verified successfully |
+| `verification.failure` | ERROR | Hash mismatch detected |
+| `verification.retry` | WARN | Retry attempt initiated |
+| `verification.quarantine` | ERROR | Artifact quarantined |
+| `verification.skip` | DEBUG | Verification skipped (mode=none) |
+
+### Metrics
+
+| Metric | Type | Description |
+|--------|------|-------------|
+| `orchard_verification_total` | Counter | Total verification attempts |
+| `orchard_verification_failures` | Counter | Failed verifications |
+| `orchard_verification_retries` | Counter | Retry attempts |
+| `orchard_verification_duration_ms` | Histogram | Verification time |
+
+### Audit Log Entry
+
+```json
+{
+  "action": "artifact.download.verified",
+  "resource": "project/foo/package/bar/artifact/abc123",
+  "user_id": "user@example.com",
+  "details": {
+    "verification_mode": "pre",
+    "verified": true,
+    "retry_count": 0,
+    "duration_ms": 45
+  }
+}
+```
+
+## Security Considerations
+
+1. **Strict Mode for Sensitive Data**: Use strict mode for artifacts containing credentials, certificates, or security-critical code.
+
+2. **Quarantine Isolation**: Quarantined artifacts should be moved to a separate S3 prefix or bucket for forensic analysis.
+
+3. **Alert on Repeated Failures**: Multiple verification failures for the same artifact may indicate storage corruption or tampering.
+
+4. **Audit Trail**: All verification events should be logged for compliance and forensic purposes.
+
+5. **Client Trust**: In `none` and `header` modes, clients must implement their own verification for security guarantees.
+
+## Implementation Phases
+
+### Phase 1: Headers Only
+- Add `X-Checksum-SHA256` header to all downloads
+- Add `verify=header` mode support
+- Add configuration options
+
+### Phase 2: Stream Verification
+- Implement `HashingStreamWrapper`
+- Add `verify=stream` mode
+- Add verification logging
+
+### Phase 3: Pre-Verification
+- Implement buffered verification
+- Add retry mechanism
+- Add `verify=pre` mode
+
+### Phase 4: Strict Mode
+- Implement quarantine mechanism
+- Add alerting integration
+- Add `verify=strict` mode
+
+## Client Integration Examples
+
+### curl with Verification
+```bash
+#!/bin/bash
+URL="https://orchard.example.com/api/v1/project/myproject/mypackage/+/v1.0.0"
+
+# Get expected hash from headers
+EXPECTED=$(curl -sI "$URL" | grep -i "X-Checksum-SHA256" | tr -d '\r' | cut -d' ' -f2)
+
+# Download file
+curl -sO "$URL"
+FILENAME=$(basename "$URL")
+
+# Verify
+ACTUAL=$(sha256sum "$FILENAME" | cut -d' ' -f1)
+
+if [ "$EXPECTED" = "$ACTUAL" ]; then
+    echo "✓ Verification passed"
+else
+    echo "✗ Verification FAILED"
+    echo "  Expected: $EXPECTED"
+    echo "  Actual:   $ACTUAL"
+    exit 1
+fi
+```
+
+### Python Client
+```python
+import hashlib
+import requests
+
+def download_verified(url: str) -> bytes:
+    # Get headers first
+    head = requests.head(url)
+    expected_hash = head.headers.get('X-Checksum-SHA256')
+    expected_size = int(head.headers.get('Content-Length', 0))
+
+    # Download content
+    response = requests.get(url)
+    content = response.content
+
+    # Verify size
+    if len(content) != expected_size:
+        raise ValueError(f"Size mismatch: {len(content)} != {expected_size}")
+
+    # Verify hash
+    actual_hash = hashlib.sha256(content).hexdigest()
+    if actual_hash != expected_hash:
+        raise ValueError(f"Hash mismatch: {actual_hash} != {expected_hash}")
+
+    return content
+```
+
+### Server-Side Verification
+```bash
+# Force server to verify before sending
+curl -O "https://orchard.example.com/api/v1/project/myproject/mypackage/+/v1.0.0?verify=pre"
+
+# Check if verification was performed
+curl -I "https://orchard.example.com/api/v1/project/myproject/mypackage/+/v1.0.0?verify=pre" | grep X-Verified
+# X-Verified: true
+```
--- a/frontend/src/api.ts
+++ b/frontend/src/api.ts
@@ -11,6 +11,8 @@ import {
  TagListParams,
  PackageListParams,
  ArtifactListParams,
+  ProjectListParams,
+  GlobalSearchResponse,
 } from './types';

 const API_BASE = '/api/v1';
@@ -34,8 +36,15 @@ function buildQueryString(params: Record<string, unknown>): string {
  return query ? `?${query}` : '';
 }

+// Global Search API
+export async function globalSearch(query: string, limit: number = 5): Promise<GlobalSearchResponse> {
+  const params = buildQueryString({ q: query, limit });
+  const response = await fetch(`${API_BASE}/search${params}`);
+  return handleResponse<GlobalSearchResponse>(response);
+}
+
 // Project API
-export async function listProjects(params: ListParams = {}): Promise<PaginatedResponse<Project>> {
+export async function listProjects(params: ProjectListParams = {}): Promise<PaginatedResponse<Project>> {
  const query = buildQueryString(params as Record<string, unknown>);
  const response = await fetch(`${API_BASE}/projects${query}`);
  return handleResponse<PaginatedResponse<Project>>(response);
--- a/frontend/src/components/FilterDropdown.css
+++ b/frontend/src/components/FilterDropdown.css
@@ -0,0 +1,75 @@
+.filter-dropdown {
+  position: relative;
+}
+
+.filter-dropdown__trigger {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 12px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  color: var(--text-secondary);
+  font-size: 0.875rem;
+  cursor: pointer;
+  transition: all var(--transition-fast);
+}
+
+.filter-dropdown__trigger:hover {
+  background: var(--bg-hover);
+  color: var(--text-primary);
+}
+
+.filter-dropdown__trigger--active {
+  border-color: var(--accent-primary);
+  color: var(--text-primary);
+}
+
+.filter-dropdown__chevron {
+  transition: transform var(--transition-fast);
+}
+
+.filter-dropdown__chevron--open {
+  transform: rotate(180deg);
+}
+
+.filter-dropdown__menu {
+  position: absolute;
+  top: calc(100% + 4px);
+  left: 0;
+  min-width: 150px;
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  box-shadow: var(--shadow-lg);
+  z-index: 50;
+  overflow: hidden;
+}
+
+.filter-dropdown__option {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  width: 100%;
+  padding: 8px 12px;
+  background: transparent;
+  border: none;
+  color: var(--text-primary);
+  font-size: 0.875rem;
+  text-align: left;
+  cursor: pointer;
+  transition: background var(--transition-fast);
+}
+
+.filter-dropdown__option:hover {
+  background: var(--bg-hover);
+}
+
+.filter-dropdown__option--selected {
+  color: var(--accent-primary);
+}
+
+.filter-dropdown__option svg {
+  color: var(--accent-primary);
+}
--- a/frontend/src/components/FilterDropdown.tsx
+++ b/frontend/src/components/FilterDropdown.tsx
@@ -0,0 +1,80 @@
+import { useState, useRef, useEffect } from 'react';
+import './FilterDropdown.css';
+
+export interface FilterOption {
+  value: string;
+  label: string;
+}
+
+interface FilterDropdownProps {
+  label: string;
+  options: FilterOption[];
+  value: string;
+  onChange: (value: string) => void;
+  className?: string;
+}
+
+export function FilterDropdown({ label, options, value, onChange, className = '' }: FilterDropdownProps) {
+  const [isOpen, setIsOpen] = useState(false);
+  const dropdownRef = useRef<HTMLDivElement>(null);
+
+  const selectedOption = options.find((o) => o.value === value);
+
+  useEffect(() => {
+    function handleClickOutside(event: MouseEvent) {
+      if (dropdownRef.current && !dropdownRef.current.contains(event.target as Node)) {
+        setIsOpen(false);
+      }
+    }
+
+    document.addEventListener('mousedown', handleClickOutside);
+    return () => document.removeEventListener('mousedown', handleClickOutside);
+  }, []);
+
+  return (
+    <div className={`filter-dropdown ${className}`.trim()} ref={dropdownRef}>
+      <button
+        type="button"
+        className={`filter-dropdown__trigger ${value ? 'filter-dropdown__trigger--active' : ''}`}
+        onClick={() => setIsOpen(!isOpen)}
+        aria-expanded={isOpen}
+      >
+        <span>{selectedOption ? selectedOption.label : label}</span>
+        <svg
+          className={`filter-dropdown__chevron ${isOpen ? 'filter-dropdown__chevron--open' : ''}`}
+          width="14"
+          height="14"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          strokeWidth="2"
+        >
+          <polyline points="6 9 12 15 18 9" />
+        </svg>
+      </button>
+
+      {isOpen && (
+        <div className="filter-dropdown__menu">
+          {options.map((option) => (
+            <button
+              key={option.value}
+              type="button"
+              className={`filter-dropdown__option ${option.value === value ? 'filter-dropdown__option--selected' : ''}`}
+              onClick={() => {
+                onChange(option.value);
+                setIsOpen(false);
+              }}
+            >
+              {option.label}
+              {option.value === value && (
+                <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                  <polyline points="20 6 9 17 4 12" />
+                </svg>
+              )}
+            </button>
+          ))}
+        </div>
+      )}
+    </div>
+  );
+}
--- a/frontend/src/components/GlobalSearch.css
+++ b/frontend/src/components/GlobalSearch.css
@@ -0,0 +1,216 @@
+.global-search {
+  position: relative;
+  flex: 1;
+  max-width: 400px;
+  margin: 0 24px;
+}
+
+.global-search__input-wrapper {
+  position: relative;
+  display: flex;
+  align-items: center;
+}
+
+.global-search__icon {
+  position: absolute;
+  left: 12px;
+  color: var(--text-secondary);
+  pointer-events: none;
+}
+
+.global-search__input {
+  width: 100%;
+  padding: 8px 40px 8px 36px;
+  background: var(--bg-tertiary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-md);
+  color: var(--text-primary);
+  font-size: 0.875rem;
+  transition: all var(--transition-fast);
+}
+
+.global-search__input:focus {
+  outline: none;
+  border-color: var(--accent-primary);
+  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
+}
+
+.global-search__input::placeholder {
+  color: var(--text-muted);
+}
+
+.global-search__shortcut {
+  position: absolute;
+  right: 8px;
+  padding: 2px 6px;
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-sm);
+  color: var(--text-muted);
+  font-family: inherit;
+  font-size: 0.75rem;
+  pointer-events: none;
+}
+
+.global-search__spinner {
+  position: absolute;
+  right: 36px;
+  width: 14px;
+  height: 14px;
+  border: 2px solid var(--border-primary);
+  border-top-color: var(--accent-primary);
+  border-radius: 50%;
+  animation: spin 0.6s linear infinite;
+}
+
+@keyframes spin {
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+/* Dropdown */
+.global-search__dropdown {
+  position: absolute;
+  top: calc(100% + 8px);
+  left: 0;
+  right: 0;
+  background: var(--bg-secondary);
+  border: 1px solid var(--border-primary);
+  border-radius: var(--radius-lg);
+  box-shadow: var(--shadow-lg);
+  max-height: 400px;
+  overflow-y: auto;
+  z-index: 1000;
+}
+
+.global-search__empty {
+  padding: 24px;
+  text-align: center;
+  color: var(--text-secondary);
+  font-size: 0.875rem;
+}
+
+/* Sections */
+.global-search__section {
+  padding: 8px 0;
+  border-bottom: 1px solid var(--border-primary);
+}
+
+.global-search__section:last-child {
+  border-bottom: none;
+}
+
+.global-search__section-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 4px 12px 8px;
+  color: var(--text-secondary);
+  font-size: 0.75rem;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+}
+
+.global-search__count {
+  background: var(--bg-tertiary);
+  padding: 2px 6px;
+  border-radius: var(--radius-sm);
+  font-size: 0.7rem;
+}
+
+/* Results */
+.global-search__result {
+  display: flex;
+  align-items: flex-start;
+  gap: 12px;
+  width: 100%;
+  padding: 8px 12px;
+  background: transparent;
+  border: none;
+  text-align: left;
+  color: var(--text-primary);
+  cursor: pointer;
+  transition: background var(--transition-fast);
+}
+
+.global-search__result:hover,
+.global-search__result.selected {
+  background: var(--bg-hover);
+}
+
+.global-search__result svg {
+  flex-shrink: 0;
+  margin-top: 2px;
+  color: var(--text-secondary);
+}
+
+.global-search__result-content {
+  flex: 1;
+  min-width: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+}
+
+.global-search__result-name {
+  font-weight: 500;
+  color: var(--text-primary);
+}
+
+.global-search__result-path {
+  font-size: 0.75rem;
+  color: var(--text-secondary);
+}
+
+.global-search__result-desc {
+  font-size: 0.75rem;
+  color: var(--text-muted);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+/* Badges */
+.global-search__badge {
+  flex-shrink: 0;
+  padding: 2px 8px;
+  border-radius: var(--radius-sm);
+  font-size: 0.7rem;
+  font-weight: 500;
+  text-transform: uppercase;
+}
+
+.global-search__badge.public {
+  background: rgba(16, 185, 129, 0.15);
+  color: var(--accent-primary);
+}
+
+.global-search__badge.private {
+  background: rgba(234, 179, 8, 0.15);
+  color: #eab308;
+}
+
+.global-search__badge.format {
+  background: var(--bg-tertiary);
+  color: var(--text-secondary);
+}
+
+/* Responsive */
+@media (max-width: 768px) {
+  .global-search {
+    max-width: none;
+    margin: 0 12px;
+  }
+
+  .global-search__shortcut {
+    display: none;
+  }
+}
+
+@media (max-width: 640px) {
+  .global-search {
+    display: none;
+  }
+}
--- a/frontend/src/components/GlobalSearch.tsx
+++ b/frontend/src/components/GlobalSearch.tsx
@@ -0,0 +1,265 @@
+import { useState, useEffect, useRef, useCallback } from 'react';
+import { useNavigate } from 'react-router-dom';
+import { globalSearch } from '../api';
+import { GlobalSearchResponse } from '../types';
+import './GlobalSearch.css';
+
+export function GlobalSearch() {
+  const navigate = useNavigate();
+  const [query, setQuery] = useState('');
+  const [results, setResults] = useState<GlobalSearchResponse | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [isOpen, setIsOpen] = useState(false);
+  const [selectedIndex, setSelectedIndex] = useState(-1);
+  const inputRef = useRef<HTMLInputElement>(null);
+  const containerRef = useRef<HTMLDivElement>(null);
+
+  // Build flat list of results for keyboard navigation
+  const flatResults = results
+    ? [
+        ...results.projects.map((p) => ({ type: 'project' as const, item: p })),
+        ...results.packages.map((p) => ({ type: 'package' as const, item: p })),
+        ...results.artifacts.map((a) => ({ type: 'artifact' as const, item: a })),
+      ]
+    : [];
+
+  const handleSearch = useCallback(async (searchQuery: string) => {
+    if (!searchQuery.trim()) {
+      setResults(null);
+      setIsOpen(false);
+      return;
+    }
+
+    setLoading(true);
+    try {
+      const data = await globalSearch(searchQuery);
+      setResults(data);
+      setIsOpen(true);
+      setSelectedIndex(-1);
+    } catch (err) {
+      console.error('Search failed:', err);
+      setResults(null);
+    } finally {
+      setLoading(false);
+    }
+  }, []);
+
+  // Debounced search
+  useEffect(() => {
+    const timer = setTimeout(() => {
+      handleSearch(query);
+    }, 300);
+
+    return () => clearTimeout(timer);
+  }, [query, handleSearch]);
+
+  // Close on click outside
+  useEffect(() => {
+    function handleClickOutside(event: MouseEvent) {
+      if (containerRef.current && !containerRef.current.contains(event.target as Node)) {
+        setIsOpen(false);
+      }
+    }
+
+    document.addEventListener('mousedown', handleClickOutside);
+    return () => document.removeEventListener('mousedown', handleClickOutside);
+  }, []);
+
+  // Keyboard navigation
+  useEffect(() => {
+    function handleKeyDown(event: KeyboardEvent) {
+      if (event.key === '/' && !['INPUT', 'TEXTAREA'].includes((event.target as HTMLElement).tagName)) {
+        event.preventDefault();
+        inputRef.current?.focus();
+      }
+
+      if (!isOpen) return;
+
+      switch (event.key) {
+        case 'ArrowDown':
+          event.preventDefault();
+          setSelectedIndex((prev) => Math.min(prev + 1, flatResults.length - 1));
+          break;
+        case 'ArrowUp':
+          event.preventDefault();
+          setSelectedIndex((prev) => Math.max(prev - 1, -1));
+          break;
+        case 'Enter':
+          if (selectedIndex >= 0 && flatResults[selectedIndex]) {
+            event.preventDefault();
+            navigateToResult(flatResults[selectedIndex]);
+          }
+          break;
+        case 'Escape':
+          setIsOpen(false);
+          inputRef.current?.blur();
+          break;
+      }
+    }
+
+    document.addEventListener('keydown', handleKeyDown);
+    return () => document.removeEventListener('keydown', handleKeyDown);
+  }, [isOpen, selectedIndex, flatResults]);
+
+  function navigateToResult(result: (typeof flatResults)[0]) {
+    setIsOpen(false);
+    setQuery('');
+
+    switch (result.type) {
+      case 'project':
+        navigate(`/project/${result.item.name}`);
+        break;
+      case 'package':
+        navigate(`/project/${result.item.project_name}/${result.item.name}`);
+        break;
+      case 'artifact':
+        navigate(`/project/${result.item.project_name}/${result.item.package_name}`);
+        break;
+    }
+  }
+
+  const hasResults = results && results.counts.total > 0;
+
+  return (
+    <div className="global-search" ref={containerRef}>
+      <div className="global-search__input-wrapper">
+        <svg
+          className="global-search__icon"
+          width="16"
+          height="16"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          strokeWidth="2"
+        >
+          <circle cx="11" cy="11" r="8" />
+          <line x1="21" y1="21" x2="16.65" y2="16.65" />
+        </svg>
+        <input
+          ref={inputRef}
+          type="text"
+          value={query}
+          onChange={(e) => setQuery(e.target.value)}
+          onFocus={() => query && results && setIsOpen(true)}
+          placeholder="Search projects, packages, artifacts..."
+          className="global-search__input"
+        />
+        <kbd className="global-search__shortcut">/</kbd>
+        {loading && <span className="global-search__spinner" />}
+      </div>
+
+      {isOpen && (
+        <div className="global-search__dropdown">
+          {!hasResults && query && (
+            <div className="global-search__empty">No results found for "{query}"</div>
+          )}
+
+          {hasResults && (
+            <>
+              {results.projects.length > 0 && (
+                <div className="global-search__section">
+                  <div className="global-search__section-header">
+                    Projects
+                    <span className="global-search__count">{results.counts.projects}</span>
+                  </div>
+                  {results.projects.map((project, index) => {
+                    const flatIndex = index;
+                    return (
+                      <button
+                        key={project.id}
+                        className={`global-search__result ${selectedIndex === flatIndex ? 'selected' : ''}`}
+                        onClick={() => navigateToResult({ type: 'project', item: project })}
+                        onMouseEnter={() => setSelectedIndex(flatIndex)}
+                      >
+                        <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                          <path d="M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z" />
+                        </svg>
+                        <div className="global-search__result-content">
+                          <span className="global-search__result-name">{project.name}</span>
+                          {project.description && (
+                            <span className="global-search__result-desc">{project.description}</span>
+                          )}
+                        </div>
+                        <span className={`global-search__badge ${project.is_public ? 'public' : 'private'}`}>
+                          {project.is_public ? 'Public' : 'Private'}
+                        </span>
+                      </button>
+                    );
+                  })}
+                </div>
+              )}
+
+              {results.packages.length > 0 && (
+                <div className="global-search__section">
+                  <div className="global-search__section-header">
+                    Packages
+                    <span className="global-search__count">{results.counts.packages}</span>
+                  </div>
+                  {results.packages.map((pkg, index) => {
+                    const flatIndex = results.projects.length + index;
+                    return (
+                      <button
+                        key={pkg.id}
+                        className={`global-search__result ${selectedIndex === flatIndex ? 'selected' : ''}`}
+                        onClick={() => navigateToResult({ type: 'package', item: pkg })}
+                        onMouseEnter={() => setSelectedIndex(flatIndex)}
+                      >
+                        <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                          <path d="M16.5 9.4l-9-5.19M21 16V8a2 2 0 0 0-1-1.73l-7-4a2 2 0 0 0-2 0l-7 4A2 2 0 0 0 3 8v8a2 2 0 0 0 1 1.73l7 4a2 2 0 0 0 2 0l7-4A2 2 0 0 0 21 16z" />
+                          <polyline points="3.27 6.96 12 12.01 20.73 6.96" />
+                          <line x1="12" y1="22.08" x2="12" y2="12" />
+                        </svg>
+                        <div className="global-search__result-content">
+                          <span className="global-search__result-name">{pkg.name}</span>
+                          <span className="global-search__result-path">{pkg.project_name}</span>
+                          {pkg.description && (
+                            <span className="global-search__result-desc">{pkg.description}</span>
+                          )}
+                        </div>
+                        <span className="global-search__badge format">{pkg.format}</span>
+                      </button>
+                    );
+                  })}
+                </div>
+              )}
+
+              {results.artifacts.length > 0 && (
+                <div className="global-search__section">
+                  <div className="global-search__section-header">
+                    Artifacts / Tags
+                    <span className="global-search__count">{results.counts.artifacts}</span>
+                  </div>
+                  {results.artifacts.map((artifact, index) => {
+                    const flatIndex = results.projects.length + results.packages.length + index;
+                    return (
+                      <button
+                        key={artifact.tag_id}
+                        className={`global-search__result ${selectedIndex === flatIndex ? 'selected' : ''}`}
+                        onClick={() => navigateToResult({ type: 'artifact', item: artifact })}
+                        onMouseEnter={() => setSelectedIndex(flatIndex)}
+                      >
+                        <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                          <path d="M20.59 13.41l-7.17 7.17a2 2 0 0 1-2.83 0L2 12V2h10l8.59 8.59a2 2 0 0 1 0 2.82z" />
+                          <line x1="7" y1="7" x2="7.01" y2="7" />
+                        </svg>
+                        <div className="global-search__result-content">
+                          <span className="global-search__result-name">{artifact.tag_name}</span>
+                          <span className="global-search__result-path">
+                            {artifact.project_name} / {artifact.package_name}
+                          </span>
+                          {artifact.original_name && (
+                            <span className="global-search__result-desc">{artifact.original_name}</span>
+                          )}
+                        </div>
+                      </button>
+                    );
+                  })}
+                </div>
+              )}
+            </>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}
--- a/frontend/src/components/Layout.tsx
+++ b/frontend/src/components/Layout.tsx
@@ -1,5 +1,6 @@
 import { ReactNode } from 'react';
 import { Link, useLocation } from 'react-router-dom';
+import { GlobalSearch } from './GlobalSearch';
 import './Layout.css';

 interface LayoutProps {
@@ -32,6 +33,7 @@ function Layout({ children }: LayoutProps) {
            </div>
            <span className="logo-text">Orchard</span>
          </Link>
+          <GlobalSearch />
          <nav className="nav">
            <Link to="/" className={location.pathname === '/' ? 'active' : ''}>
              <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
--- a/frontend/src/components/index.ts
+++ b/frontend/src/components/index.ts
@@ -4,6 +4,9 @@ export { Breadcrumb } from './Breadcrumb';
 export { SearchInput } from './SearchInput';
 export { SortDropdown } from './SortDropdown';
 export type { SortOption } from './SortDropdown';
+export { FilterDropdown } from './FilterDropdown';
+export type { FilterOption } from './FilterDropdown';
 export { FilterChip, FilterChipGroup } from './FilterChip';
 export { DataTable } from './DataTable';
 export { Pagination } from './Pagination';
+export { GlobalSearch } from './GlobalSearch';
--- a/frontend/src/pages/Home.tsx
+++ b/frontend/src/pages/Home.tsx
@@ -3,8 +3,8 @@ import { Link, useSearchParams } from 'react-router-dom';
 import { Project, PaginatedResponse } from '../types';
 import { listProjects, createProject } from '../api';
 import { Badge } from '../components/Badge';
-import { SearchInput } from '../components/SearchInput';
 import { SortDropdown, SortOption } from '../components/SortDropdown';
+import { FilterDropdown, FilterOption } from '../components/FilterDropdown';
 import { FilterChip, FilterChipGroup } from '../components/FilterChip';
 import { Pagination } from '../components/Pagination';
 import './Home.css';
@@ -15,6 +15,12 @@ const SORT_OPTIONS: SortOption[] = [
  { value: 'updated_at', label: 'Updated' },
 ];

+const VISIBILITY_OPTIONS: FilterOption[] = [
+  { value: '', label: 'All Projects' },
+  { value: 'public', label: 'Public Only' },
+  { value: 'private', label: 'Private Only' },
+];
+
 function Home() {
  const [searchParams, setSearchParams] = useSearchParams();

@@ -27,9 +33,9 @@ function Home() {

  // Get params from URL
  const page = parseInt(searchParams.get('page') || '1', 10);
-  const search = searchParams.get('search') || '';
  const sort = searchParams.get('sort') || 'name';
  const order = (searchParams.get('order') || 'asc') as 'asc' | 'desc';
+  const visibility = searchParams.get('visibility') || '';

  const updateParams = useCallback(
    (updates: Record<string, string | undefined>) => {
@@ -49,7 +55,12 @@ function Home() {
  const loadProjects = useCallback(async () => {
    try {
      setLoading(true);
-      const data = await listProjects({ page, search, sort, order });
+      const data = await listProjects({
+        page,
+        sort,
+        order,
+        visibility: visibility as 'public' | 'private' | undefined || undefined,
+      });
      setProjectsData(data);
      setError(null);
    } catch (err) {
@@ -57,7 +68,7 @@ function Home() {
    } finally {
      setLoading(false);
    }
-  }, [page, search, sort, order]);
+  }, [page, sort, order, visibility]);

  useEffect(() => {
    loadProjects();
@@ -78,14 +89,14 @@ function Home() {
    }
  }

-  const handleSearchChange = (value: string) => {
-    updateParams({ search: value, page: '1' });
-  };
-
  const handleSortChange = (newSort: string, newOrder: 'asc' | 'desc') => {
    updateParams({ sort: newSort, order: newOrder, page: '1' });
  };

+  const handleVisibilityChange = (value: string) => {
+    updateParams({ visibility: value, page: '1' });
+  };
+
  const handlePageChange = (newPage: number) => {
    updateParams({ page: String(newPage) });
  };
@@ -94,7 +105,7 @@ function Home() {
    setSearchParams({});
  };

-  const hasActiveFilters = search !== '';
+  const hasActiveFilters = visibility !== '';
  const projects = projectsData?.items || [];
  const pagination = projectsData?.pagination;

@@ -154,18 +165,24 @@ function Home() {
      )}

      <div className="list-controls">
-        <SearchInput
-          value={search}
-          onChange={handleSearchChange}
-          placeholder="Search projects..."
-          className="list-controls__search"
+        <FilterDropdown
+          label="Visibility"
+          options={VISIBILITY_OPTIONS}
+          value={visibility}
+          onChange={handleVisibilityChange}
        />
        <SortDropdown options={SORT_OPTIONS} value={sort} order={order} onChange={handleSortChange} />
      </div>

      {hasActiveFilters && (
        <FilterChipGroup onClearAll={clearFilters}>
-          {search && <FilterChip label="Search" value={search} onRemove={() => handleSearchChange('')} />}
+          {visibility && (
+            <FilterChip
+              label="Visibility"
+              value={visibility === 'public' ? 'Public' : 'Private'}
+              onRemove={() => handleVisibilityChange('')}
+            />
+          )}
        </FilterChipGroup>
      )}

--- a/frontend/src/pages/PackagePage.tsx
+++ b/frontend/src/pages/PackagePage.tsx
@@ -325,7 +325,7 @@ function PackagePage() {
        <SearchInput
          value={search}
          onChange={handleSearchChange}
-          placeholder="Search tags..."
+          placeholder="Filter tags..."
          className="list-controls__search"
        />
        <SortDropdown options={SORT_OPTIONS} value={sort} order={order} onChange={handleSortChange} />
@@ -333,7 +333,7 @@ function PackagePage() {

      {hasActiveFilters && (
        <FilterChipGroup onClearAll={clearFilters}>
-          {search && <FilterChip label="Search" value={search} onRemove={() => handleSearchChange('')} />}
+          {search && <FilterChip label="Filter" value={search} onRemove={() => handleSearchChange('')} />}
        </FilterChipGroup>
      )}

--- a/frontend/src/pages/ProjectPage.tsx
+++ b/frontend/src/pages/ProjectPage.tsx
@@ -226,7 +226,7 @@ function ProjectPage() {
        <SearchInput
          value={search}
          onChange={handleSearchChange}
-          placeholder="Search packages..."
+          placeholder="Filter packages..."
          className="list-controls__search"
        />
        <select
@@ -246,7 +246,7 @@ function ProjectPage() {

      {hasActiveFilters && (
        <FilterChipGroup onClearAll={clearFilters}>
-          {search && <FilterChip label="Search" value={search} onRemove={() => handleSearchChange('')} />}
+          {search && <FilterChip label="Filter" value={search} onRemove={() => handleSearchChange('')} />}
          {format && <FilterChip label="Format" value={format} onRemove={() => handleFormatChange('')} />}
        </FilterChipGroup>
      )}
--- a/frontend/src/types.ts
+++ b/frontend/src/types.ts
@@ -117,3 +117,47 @@ export interface UploadResponse {
  package: string;
  tag: string | null;
 }
+
+// Global search types
+export interface SearchResultProject {
+  id: string;
+  name: string;
+  description: string | null;
+  is_public: boolean;
+}
+
+export interface SearchResultPackage {
+  id: string;
+  project_id: string;
+  project_name: string;
+  name: string;
+  description: string | null;
+  format: string;
+}
+
+export interface SearchResultArtifact {
+  tag_id: string;
+  tag_name: string;
+  artifact_id: string;
+  package_id: string;
+  package_name: string;
+  project_name: string;
+  original_name: string | null;
+}
+
+export interface GlobalSearchResponse {
+  query: string;
+  projects: SearchResultProject[];
+  packages: SearchResultPackage[];
+  artifacts: SearchResultArtifact[];
+  counts: {
+    projects: number;
+    packages: number;
+    artifacts: number;
+    total: number;
+  };
+}
+
+export interface ProjectListParams extends ListParams {
+  visibility?: 'public' | 'private';
+}
--- a/migrations/001_initial.sql
+++ b/migrations/001_initial.sql
@@ -14,6 +14,7 @@ CREATE TABLE IF NOT EXISTS projects (

 CREATE INDEX idx_projects_name ON projects(name);
 CREATE INDEX idx_projects_created_by ON projects(created_by);
+CREATE INDEX idx_projects_public ON projects(name) WHERE is_public = true;

 -- Packages (collections within projects)
 CREATE TABLE IF NOT EXISTS packages (
@@ -21,6 +22,8 @@ CREATE TABLE IF NOT EXISTS packages (
    project_id UUID NOT NULL REFERENCES projects(id) ON DELETE CASCADE,
    name VARCHAR(255) NOT NULL,
    description TEXT,
+    format VARCHAR(50) DEFAULT 'generic',  -- package type: generic, npm, pypi, docker, etc.
+    platform VARCHAR(50) DEFAULT 'any',    -- target platform: any, linux, darwin, windows, etc.
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    UNIQUE(project_id, name)
@@ -28,21 +31,30 @@ CREATE TABLE IF NOT EXISTS packages (

 CREATE INDEX idx_packages_project_id ON packages(project_id);
 CREATE INDEX idx_packages_name ON packages(name);
+CREATE INDEX idx_packages_format ON packages(format);
+CREATE INDEX idx_packages_platform ON packages(platform);

 -- Artifacts (Content-Addressable)
 CREATE TABLE IF NOT EXISTS artifacts (
    id VARCHAR(64) PRIMARY KEY,  -- SHA256 hash
-    size BIGINT NOT NULL,
+    size BIGINT NOT NULL CHECK (size > 0),
    content_type VARCHAR(255),
    original_name VARCHAR(1024),
+    checksum_md5 VARCHAR(32),    -- MD5 hash for additional verification
+    checksum_sha1 VARCHAR(40),   -- SHA1 hash for compatibility
+    s3_etag VARCHAR(64),         -- S3 ETag for verification
+    metadata JSONB,              -- format-specific metadata
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    created_by VARCHAR(255) NOT NULL,
-    ref_count INTEGER DEFAULT 1,
+    ref_count INTEGER DEFAULT 1 CHECK (ref_count >= 0),
    s3_key VARCHAR(1024) NOT NULL
 );

 CREATE INDEX idx_artifacts_created_at ON artifacts(created_at);
 CREATE INDEX idx_artifacts_created_by ON artifacts(created_by);
+CREATE INDEX idx_artifacts_metadata ON artifacts USING GIN (metadata);
+CREATE INDEX idx_artifacts_checksum_md5 ON artifacts(checksum_md5) WHERE checksum_md5 IS NOT NULL;
+CREATE INDEX idx_artifacts_checksum_sha1 ON artifacts(checksum_sha1) WHERE checksum_sha1 IS NOT NULL;

 -- Tags (Aliases pointing to artifacts)
 CREATE TABLE IF NOT EXISTS tags (
@@ -51,12 +63,14 @@ CREATE TABLE IF NOT EXISTS tags (
    name VARCHAR(255) NOT NULL,
    artifact_id VARCHAR(64) NOT NULL REFERENCES artifacts(id),
    created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
+    updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    created_by VARCHAR(255) NOT NULL,
    UNIQUE(package_id, name)
 );

 CREATE INDEX idx_tags_package_id ON tags(package_id);
 CREATE INDEX idx_tags_artifact_id ON tags(artifact_id);
+CREATE INDEX idx_tags_package_created_at ON tags(package_id, created_at DESC);

 -- Tag History (for rollback capability)
 CREATE TABLE IF NOT EXISTS tag_history (
@@ -64,11 +78,13 @@ CREATE TABLE IF NOT EXISTS tag_history (
    tag_id UUID NOT NULL REFERENCES tags(id) ON DELETE CASCADE,
    old_artifact_id VARCHAR(64) REFERENCES artifacts(id),
    new_artifact_id VARCHAR(64) NOT NULL REFERENCES artifacts(id),
+    change_type VARCHAR(20) NOT NULL DEFAULT 'update' CHECK (change_type IN ('create', 'update', 'delete')),
    changed_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    changed_by VARCHAR(255) NOT NULL
 );

 CREATE INDEX idx_tag_history_tag_id ON tag_history(tag_id);
+CREATE INDEX idx_tag_history_changed_at ON tag_history(changed_at);

 -- Uploads (upload event records)
 CREATE TABLE IF NOT EXISTS uploads (
@@ -76,6 +92,11 @@ CREATE TABLE IF NOT EXISTS uploads (
    artifact_id VARCHAR(64) NOT NULL REFERENCES artifacts(id),
    package_id UUID NOT NULL REFERENCES packages(id),
    original_name VARCHAR(1024),
+    tag_name VARCHAR(255),              -- tag assigned during upload
+    user_agent VARCHAR(512),            -- client identification
+    duration_ms INTEGER,                -- upload timing in milliseconds
+    deduplicated BOOLEAN DEFAULT false, -- whether artifact was deduplicated
+    checksum_verified BOOLEAN DEFAULT true, -- whether checksum was verified
    uploaded_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
    uploaded_by VARCHAR(255) NOT NULL,
    source_ip VARCHAR(45)
@@ -84,6 +105,8 @@ CREATE TABLE IF NOT EXISTS uploads (
 CREATE INDEX idx_uploads_artifact_id ON uploads(artifact_id);
 CREATE INDEX idx_uploads_package_id ON uploads(package_id);
 CREATE INDEX idx_uploads_uploaded_at ON uploads(uploaded_at);
+CREATE INDEX idx_uploads_package_uploaded_at ON uploads(package_id, uploaded_at DESC);
+CREATE INDEX idx_uploads_uploaded_by_at ON uploads(uploaded_by, uploaded_at DESC);

 -- Consumers (Dependency tracking)
 CREATE TABLE IF NOT EXISTS consumers (
@@ -141,14 +164,17 @@ CREATE INDEX idx_audit_logs_action ON audit_logs(action);
 CREATE INDEX idx_audit_logs_resource ON audit_logs(resource);
 CREATE INDEX idx_audit_logs_user_id ON audit_logs(user_id);
 CREATE INDEX idx_audit_logs_timestamp ON audit_logs(timestamp);
+CREATE INDEX idx_audit_logs_resource_timestamp ON audit_logs(resource, timestamp DESC);
+CREATE INDEX idx_audit_logs_user_timestamp ON audit_logs(user_id, timestamp DESC);
+CREATE INDEX idx_audit_logs_details ON audit_logs USING GIN (details);

 -- Trigger to update tag history on changes
 CREATE OR REPLACE FUNCTION track_tag_changes()
 RETURNS TRIGGER AS $$
 BEGIN
    IF TG_OP = 'UPDATE' AND OLD.artifact_id != NEW.artifact_id THEN
-        INSERT INTO tag_history (id, tag_id, old_artifact_id, new_artifact_id, changed_at, changed_by)
-        VALUES (gen_random_uuid(), NEW.id, OLD.artifact_id, NEW.artifact_id, NOW(), NEW.created_by);
+        INSERT INTO tag_history (id, tag_id, old_artifact_id, new_artifact_id, change_type, changed_at, changed_by)
+        VALUES (gen_random_uuid(), NEW.id, OLD.artifact_id, NEW.artifact_id, 'update', NOW(), NEW.created_by);
    END IF;
    RETURN NEW;
 END;
@@ -158,3 +184,72 @@ CREATE TRIGGER tag_changes_trigger
    AFTER UPDATE ON tags
    FOR EACH ROW
    EXECUTE FUNCTION track_tag_changes();
+
+-- Trigger to auto-update updated_at timestamps
+CREATE OR REPLACE FUNCTION update_updated_at_column()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = NOW();
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE TRIGGER projects_updated_at_trigger
+    BEFORE UPDATE ON projects
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();
+
+CREATE TRIGGER packages_updated_at_trigger
+    BEFORE UPDATE ON packages
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();
+
+CREATE TRIGGER tags_updated_at_trigger
+    BEFORE UPDATE ON tags
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();
+
+-- Triggers for maintaining artifact ref_count accuracy
+CREATE OR REPLACE FUNCTION increment_artifact_ref_count()
+RETURNS TRIGGER AS $$
+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;
+$$ LANGUAGE plpgsql;
+
+-- Note: ref_count triggers on tags table
+-- These track how many tags reference each artifact
+CREATE TRIGGER tags_ref_count_insert_trigger
+    AFTER INSERT ON tags
+    FOR EACH ROW
+    EXECUTE FUNCTION increment_artifact_ref_count();
+
+CREATE TRIGGER tags_ref_count_delete_trigger
+    AFTER DELETE ON tags
+    FOR EACH ROW
+    EXECUTE FUNCTION decrement_artifact_ref_count();
+
+CREATE TRIGGER tags_ref_count_update_trigger
+    AFTER UPDATE ON tags
+    FOR EACH ROW
+    EXECUTE FUNCTION update_artifact_ref_count();
--- a/migrations/002_schema_enhancements.sql
+++ b/migrations/002_schema_enhancements.sql
@@ -0,0 +1,170 @@
+-- Migration 002: Schema Enhancements
+-- Adds new fields, indexes, and triggers for improved functionality
+
+-- ============================================
+-- Packages: Add format and platform fields
+-- ============================================
+ALTER TABLE packages ADD COLUMN IF NOT EXISTS format VARCHAR(50) DEFAULT 'generic';
+ALTER TABLE packages ADD COLUMN IF NOT EXISTS platform VARCHAR(50) DEFAULT 'any';
+
+CREATE INDEX IF NOT EXISTS idx_packages_format ON packages(format);
+CREATE INDEX IF NOT EXISTS idx_packages_platform ON packages(platform);
+
+-- ============================================
+-- Artifacts: Add checksum_md5, metadata, and CHECK constraints
+-- ============================================
+ALTER TABLE artifacts ADD COLUMN IF NOT EXISTS checksum_md5 VARCHAR(32);
+ALTER TABLE artifacts ADD COLUMN IF NOT EXISTS metadata JSONB;
+
+-- Add CHECK constraints (will fail if data violates them)
+DO $$
+BEGIN
+    IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'artifacts_ref_count_check') THEN
+        ALTER TABLE artifacts ADD CONSTRAINT artifacts_ref_count_check CHECK (ref_count >= 0);
+    END IF;
+    IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'artifacts_size_check') THEN
+        ALTER TABLE artifacts ADD CONSTRAINT artifacts_size_check CHECK (size > 0);
+    END IF;
+END $$;
+
+CREATE INDEX IF NOT EXISTS idx_artifacts_metadata ON artifacts USING GIN (metadata);
+
+-- ============================================
+-- Tags: Add updated_at and composite index
+-- ============================================
+ALTER TABLE tags ADD COLUMN IF NOT EXISTS updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW();
+
+CREATE INDEX IF NOT EXISTS idx_tags_package_created_at ON tags(package_id, created_at DESC);
+
+-- ============================================
+-- Tag History: Add change_type and index
+-- ============================================
+ALTER TABLE tag_history ADD COLUMN IF NOT EXISTS change_type VARCHAR(20) DEFAULT 'update';
+
+DO $$
+BEGIN
+    IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'tag_history_change_type_check') THEN
+        ALTER TABLE tag_history ADD CONSTRAINT tag_history_change_type_check
+            CHECK (change_type IN ('create', 'update', 'delete'));
+    END IF;
+END $$;
+
+CREATE INDEX IF NOT EXISTS idx_tag_history_changed_at ON tag_history(changed_at);
+
+-- ============================================
+-- Uploads: Add new fields and composite indexes
+-- ============================================
+ALTER TABLE uploads ADD COLUMN IF NOT EXISTS tag_name VARCHAR(255);
+ALTER TABLE uploads ADD COLUMN IF NOT EXISTS user_agent VARCHAR(512);
+ALTER TABLE uploads ADD COLUMN IF NOT EXISTS duration_ms INTEGER;
+ALTER TABLE uploads ADD COLUMN IF NOT EXISTS deduplicated BOOLEAN DEFAULT false;
+ALTER TABLE uploads ADD COLUMN IF NOT EXISTS checksum_verified BOOLEAN DEFAULT true;
+
+CREATE INDEX IF NOT EXISTS idx_uploads_package_uploaded_at ON uploads(package_id, uploaded_at DESC);
+CREATE INDEX IF NOT EXISTS idx_uploads_uploaded_by_at ON uploads(uploaded_by, uploaded_at DESC);
+
+-- ============================================
+-- Audit Logs: Add composite indexes and GIN index
+-- ============================================
+CREATE INDEX IF NOT EXISTS idx_audit_logs_resource_timestamp ON audit_logs(resource, timestamp DESC);
+CREATE INDEX IF NOT EXISTS idx_audit_logs_user_timestamp ON audit_logs(user_id, timestamp DESC);
+CREATE INDEX IF NOT EXISTS idx_audit_logs_details ON audit_logs USING GIN (details);
+
+-- ============================================
+-- Projects: Add partial index for public projects
+-- ============================================
+CREATE INDEX IF NOT EXISTS idx_projects_public ON projects(name) WHERE is_public = true;
+
+-- ============================================
+-- Triggers: Update tag_changes trigger for change_type
+-- ============================================
+CREATE OR REPLACE FUNCTION track_tag_changes()
+RETURNS TRIGGER AS $$
+BEGIN
+    IF TG_OP = 'UPDATE' AND OLD.artifact_id != NEW.artifact_id THEN
+        INSERT INTO tag_history (id, tag_id, old_artifact_id, new_artifact_id, change_type, changed_at, changed_by)
+        VALUES (gen_random_uuid(), NEW.id, OLD.artifact_id, NEW.artifact_id, 'update', NOW(), NEW.created_by);
+    END IF;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- ============================================
+-- Triggers: Auto-update updated_at timestamps
+-- ============================================
+CREATE OR REPLACE FUNCTION update_updated_at_column()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = NOW();
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- Drop triggers if they exist, then recreate
+DROP TRIGGER IF EXISTS projects_updated_at_trigger ON projects;
+CREATE TRIGGER projects_updated_at_trigger
+    BEFORE UPDATE ON projects
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS packages_updated_at_trigger ON packages;
+CREATE TRIGGER packages_updated_at_trigger
+    BEFORE UPDATE ON packages
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS tags_updated_at_trigger ON tags;
+CREATE TRIGGER tags_updated_at_trigger
+    BEFORE UPDATE ON tags
+    FOR EACH ROW
+    EXECUTE FUNCTION update_updated_at_column();
+
+-- ============================================
+-- Triggers: Maintain artifact ref_count accuracy
+-- ============================================
+CREATE OR REPLACE FUNCTION increment_artifact_ref_count()
+RETURNS TRIGGER AS $$
+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;
+
+-- Note: ref_count triggers on tags table
+-- These track how many tags reference each artifact
+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
+    EXECUTE FUNCTION update_artifact_ref_count();
--- a/migrations/003_checksum_fields.sql
+++ b/migrations/003_checksum_fields.sql
@@ -0,0 +1,12 @@
+-- Migration 003: Additional Checksum Fields
+-- Adds checksum_sha1 and s3_etag fields to artifacts table
+
+-- ============================================
+-- Artifacts: Add checksum_sha1 and s3_etag fields
+-- ============================================
+ALTER TABLE artifacts ADD COLUMN IF NOT EXISTS checksum_sha1 VARCHAR(40);
+ALTER TABLE artifacts ADD COLUMN IF NOT EXISTS s3_etag VARCHAR(64);
+
+-- Create indexes for checksum lookups (optional, for verification queries)
+CREATE INDEX IF NOT EXISTS idx_artifacts_checksum_md5 ON artifacts(checksum_md5) WHERE checksum_md5 IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_artifacts_checksum_sha1 ON artifacts(checksum_sha1) WHERE checksum_sha1 IS NOT NULL;
--- a/tasks.py
+++ b/tasks.py
@@ -0,0 +1,2 @@
+# Import docker project template tasks
+from prosper.projects.docker import *
Author	SHA1	Message	Date
Mondo Diaz	caa0c5af0c	Merge branch 'feature/store-sha256-checksums' into 'main' Store SHA256 checksums with artifacts and add multiple hash support Closes #25 See merge request esv/bsf/bsf-integration/orchard/orchard-mvp!16	2025-12-15 14:47:31 -06:00
Mondo Diaz	3fd2747ae4	Store SHA256 checksums with artifacts and add multiple hash support	2025-12-15 14:47:30 -06:00
Mondo Diaz	96367da448	Merge branch 'feature/integrity-verification-design' into 'main' Add integrity verification workflow design document Closes #24 See merge request esv/bsf/bsf-integration/orchard/orchard-mvp!15	2025-12-15 14:00:32 -06:00
Mondo Diaz	2686fdcb89	Add integrity verification workflow design document	2025-12-15 14:00:32 -06:00
Dane Moss	0eb2deb4ca	Merge branch 'update_urls' into 'main' update URLs to point to BSF Closes #46 See merge request esv/bsf/bsf-integration/orchard/orchard-mvp!14	2025-12-15 11:30:07 -07:00
Dane Moss	3fe421f31d	update URLs to point to BSF	2025-12-15 11:30:07 -07:00
Mondo Diaz	68660eacf6	Merge branch 'feature/schema-enhancements' into 'main' Add schema enhancements for uploads, artifacts, and audit tracking Closes #16 See merge request esv/bsf/bsf-integration/orchard/orchard-mvp!13	2025-12-12 15:23:50 -06:00
Mondo Diaz	b52c8840f1	Add schema enhancements for uploads, artifacts, and audit tracking	2025-12-12 15:23:50 -06:00
Dane Moss	4afcdf5cda	Merge branch 'add_prosper_config' into 'main' Add prosper config Closes #45 See merge request esv/bsf/bsf-integration/orchard/orchard-mvp!12	2025-12-12 13:52:27 -07:00
Dane Moss	bc3da14d50	Add prosper config	2025-12-12 13:52:27 -07:00
Mondo Diaz	2843335f6d	Document curl -OJ flag for correct download filenames - Update download examples to use -OJ flag - Add note explaining curl download flags (-O, -J, -OJ, -o) - Add example for saving to a specific filename	2025-12-12 13:53:15 -06:00
Mondo Diaz	2097865874	Remove redundant search bar from Home, rename page filters - Remove SearchInput from Home page (use GlobalSearch in header instead) - Rename "Search packages..." to "Filter packages..." on ProjectPage - Rename "Search tags..." to "Filter tags..." on PackagePage - Update FilterChip labels from "Search" to "Filter" This differentiates the global search (header) from page-level filtering.	2025-12-12 12:55:31 -06:00
Mondo Diaz	0e1474bf6c	Merge branch 'feature/database-storage-layer' into 'main' Implement database storage layer Closes #17 See merge request esv/bsf/bsf-integration/orchard/orchard-mvp!11	2025-12-12 12:45:33 -06:00
Mondo Diaz	9604540dd3	Implement database storage layer	2025-12-12 12:45:33 -06:00
Mondo Diaz	a6df5aba5a	Merge branch 'feature/search-filtering-enhancements' into 'main' Add global search and filtering enhancements Closes #6 See merge request esv/bsf/bsf-integration/orchard/orchard-mvp!10	2025-12-12 12:12:46 -06:00
Mondo Diaz	096887d4da	Add global search and filtering enhancements	2025-12-12 12:12:46 -06:00