docs: update documentation for .kc file integration (Phases 1-4)

- SPECIFICATION.md: add 8 KC endpoints to Section 11.1, new Section 11.3
  documenting .kc format, extraction pipeline, packing, lifecycle state
  machine, and all response shapes. Update endpoint count 78 → 86.
- ROADMAP.md: mark .kc Format Spec as Complete in Tier 0 table
- STATUS.md: add KC features to core systems table, update migration
  list through 018, update endpoint count
- MODULES.md: add metadata, dependencies, and macros endpoints to
  core module listing

.gitignore

@@ -1,6 +1,7 @@
 # Binaries
 /silo
 /silod
+/migrate-storage
 *.exe
 *.dll
 *.so

Makefile

@@ -1,7 +1,8 @@
 .PHONY: build run test test-integration clean migrate fmt lint \
         docker-build docker-up docker-down docker-logs docker-ps \
         docker-clean docker-rebuild \
-        web-install web-dev web-build
+        web-install web-dev web-build \
+        migrate-storage
 
 # =============================================================================
 # Local Development
@@ -56,6 +57,13 @@ tidy:
 migrate:
 	./scripts/init-db.sh
 
+# Build and run MinIO → filesystem migration tool
+# Usage: make migrate-storage DEST=/opt/silo/data [ARGS="--dry-run --verbose"]
+migrate-storage:
+	go build -o migrate-storage ./cmd/migrate-storage
+	@echo "Built ./migrate-storage"
+	@echo "Run: ./migrate-storage -config <config.yaml> -dest <dir> [-dry-run] [-verbose]"
+
 # Connect to database (requires psql)
 db-shell:
 	PGPASSWORD=$${SILO_DB_PASSWORD:-silodev} psql -h $${SILO_DB_HOST:-localhost} -U $${SILO_DB_USER:-silo} -d $${SILO_DB_NAME:-silo}

cmd/migrate-storage/main.go

@@ -0,0 +1,288 @@
+// Command migrate-storage downloads files from MinIO and writes them to the
+// local filesystem. It is a one-shot migration tool for moving off MinIO.
+//
+// Usage:
+//
+//	migrate-storage -config config.yaml -dest /opt/silo/data [-dry-run] [-verbose]
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/kindredsystems/silo/internal/config"
+	"github.com/kindredsystems/silo/internal/db"
+	"github.com/kindredsystems/silo/internal/storage"
+	"github.com/rs/zerolog"
+)
+
+// fileEntry represents a single file to migrate.
+type fileEntry struct {
+	key       string
+	versionID string // MinIO version ID; empty if not versioned
+	size      int64  // expected size from DB; 0 if unknown
+}
+
+func main() {
+	configPath := flag.String("config", "config.yaml", "Path to configuration file")
+	dest := flag.String("dest", "", "Destination root directory (required)")
+	dryRun := flag.Bool("dry-run", false, "Preview what would be migrated without downloading")
+	verbose := flag.Bool("verbose", false, "Log every file, not just errors and summary")
+	flag.Parse()
+
+	logger := zerolog.New(os.Stdout).With().Timestamp().Logger()
+
+	if *dest == "" {
+		logger.Fatal().Msg("-dest is required")
+	}
+
+	// Load config (reuses existing config for DB + MinIO credentials).
+	cfg, err := config.Load(*configPath)
+	if err != nil {
+		logger.Fatal().Err(err).Msg("failed to load configuration")
+	}
+
+	ctx := context.Background()
+
+	// Connect to PostgreSQL.
+	database, err := db.Connect(ctx, db.Config{
+		Host:           cfg.Database.Host,
+		Port:           cfg.Database.Port,
+		Name:           cfg.Database.Name,
+		User:           cfg.Database.User,
+		Password:       cfg.Database.Password,
+		SSLMode:        cfg.Database.SSLMode,
+		MaxConnections: cfg.Database.MaxConnections,
+	})
+	if err != nil {
+		logger.Fatal().Err(err).Msg("failed to connect to database")
+	}
+	defer database.Close()
+	logger.Info().Msg("connected to database")
+
+	// Connect to MinIO.
+	store, err := storage.Connect(ctx, storage.Config{
+		Endpoint:  cfg.Storage.Endpoint,
+		AccessKey: cfg.Storage.AccessKey,
+		SecretKey: cfg.Storage.SecretKey,
+		Bucket:    cfg.Storage.Bucket,
+		UseSSL:    cfg.Storage.UseSSL,
+		Region:    cfg.Storage.Region,
+	})
+	if err != nil {
+		logger.Fatal().Err(err).Msg("failed to connect to MinIO")
+	}
+	logger.Info().Str("bucket", cfg.Storage.Bucket).Msg("connected to MinIO")
+
+	// Collect all file references from the database.
+	entries, err := collectEntries(ctx, logger, database)
+	if err != nil {
+		logger.Fatal().Err(err).Msg("failed to collect file entries from database")
+	}
+	logger.Info().Int("total", len(entries)).Msg("file entries found")
+
+	if len(entries) == 0 {
+		logger.Info().Msg("nothing to migrate")
+		return
+	}
+
+	// Migrate.
+	var migrated, skipped, failed int
+	start := time.Now()
+
+	for i, e := range entries {
+		destPath := filepath.Join(*dest, e.key)
+
+		// Check if already migrated.
+		if info, err := os.Stat(destPath); err == nil {
+			if e.size > 0 && info.Size() == e.size {
+				if *verbose {
+					logger.Info().Str("key", e.key).Msg("skipped (already exists)")
+				}
+				skipped++
+				continue
+			}
+			// Size mismatch or unknown size — re-download.
+		}
+
+		if *dryRun {
+			logger.Info().
+				Str("key", e.key).
+				Int64("size", e.size).
+				Str("version", e.versionID).
+				Msgf("[%d/%d] would migrate", i+1, len(entries))
+			continue
+		}
+
+		if err := migrateFile(ctx, store, e, destPath); err != nil {
+			logger.Error().Err(err).Str("key", e.key).Msg("failed to migrate")
+			failed++
+			continue
+		}
+
+		migrated++
+		if *verbose {
+			logger.Info().
+				Str("key", e.key).
+				Int64("size", e.size).
+				Msgf("[%d/%d] migrated", i+1, len(entries))
+		} else if (i+1)%50 == 0 {
+			logger.Info().Msgf("progress: %d/%d", i+1, len(entries))
+		}
+	}
+
+	elapsed := time.Since(start)
+	ev := logger.Info().
+		Int("total", len(entries)).
+		Int("migrated", migrated).
+		Int("skipped", skipped).
+		Int("failed", failed).
+		Dur("elapsed", elapsed)
+	if *dryRun {
+		ev.Msg("dry run complete")
+	} else {
+		ev.Msg("migration complete")
+	}
+
+	if failed > 0 {
+		os.Exit(1)
+	}
+}
+
+// collectEntries queries the database for all file references across the three
+// storage domains: revision files, item file attachments, and item thumbnails.
+// It deduplicates by key.
+func collectEntries(ctx context.Context, logger zerolog.Logger, database *db.DB) ([]fileEntry, error) {
+	pool := database.Pool()
+	seen := make(map[string]struct{})
+	var entries []fileEntry
+
+	add := func(key, versionID string, size int64) {
+		if key == "" {
+			return
+		}
+		if _, ok := seen[key]; ok {
+			return
+		}
+		seen[key] = struct{}{}
+		entries = append(entries, fileEntry{key: key, versionID: versionID, size: size})
+	}
+
+	// 1. Revision files.
+	rows, err := pool.Query(ctx,
+		`SELECT file_key, COALESCE(file_version, ''), COALESCE(file_size, 0)
+		 FROM revisions WHERE file_key IS NOT NULL`)
+	if err != nil {
+		return nil, fmt.Errorf("querying revisions: %w", err)
+	}
+	for rows.Next() {
+		var key, version string
+		var size int64
+		if err := rows.Scan(&key, &version, &size); err != nil {
+			rows.Close()
+			return nil, fmt.Errorf("scanning revision row: %w", err)
+		}
+		add(key, version, size)
+	}
+	rows.Close()
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("iterating revisions: %w", err)
+	}
+	logger.Info().Int("count", len(entries)).Msg("revision files found")
+
+	// 2. Item file attachments.
+	countBefore := len(entries)
+	rows, err = pool.Query(ctx,
+		`SELECT object_key, size FROM item_files`)
+	if err != nil {
+		return nil, fmt.Errorf("querying item_files: %w", err)
+	}
+	for rows.Next() {
+		var key string
+		var size int64
+		if err := rows.Scan(&key, &size); err != nil {
+			rows.Close()
+			return nil, fmt.Errorf("scanning item_files row: %w", err)
+		}
+		add(key, "", size)
+	}
+	rows.Close()
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("iterating item_files: %w", err)
+	}
+	logger.Info().Int("count", len(entries)-countBefore).Msg("item file attachments found")
+
+	// 3. Item thumbnails.
+	countBefore = len(entries)
+	rows, err = pool.Query(ctx,
+		`SELECT thumbnail_key FROM items WHERE thumbnail_key IS NOT NULL`)
+	if err != nil {
+		return nil, fmt.Errorf("querying item thumbnails: %w", err)
+	}
+	for rows.Next() {
+		var key string
+		if err := rows.Scan(&key); err != nil {
+			rows.Close()
+			return nil, fmt.Errorf("scanning thumbnail row: %w", err)
+		}
+		add(key, "", 0)
+	}
+	rows.Close()
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("iterating thumbnails: %w", err)
+	}
+	logger.Info().Int("count", len(entries)-countBefore).Msg("item thumbnails found")
+
+	return entries, nil
+}
+
+// migrateFile downloads a single file from MinIO and writes it atomically to destPath.
+func migrateFile(ctx context.Context, store *storage.Storage, e fileEntry, destPath string) error {
+	// Ensure parent directory exists.
+	if err := os.MkdirAll(filepath.Dir(destPath), 0755); err != nil {
+		return fmt.Errorf("creating directory: %w", err)
+	}
+
+	// Download from MinIO.
+	var reader io.ReadCloser
+	var err error
+	if e.versionID != "" {
+		reader, err = store.GetVersion(ctx, e.key, e.versionID)
+	} else {
+		reader, err = store.Get(ctx, e.key)
+	}
+	if err != nil {
+		return fmt.Errorf("downloading from MinIO: %w", err)
+	}
+	defer reader.Close()
+
+	// Write to temp file then rename for atomicity.
+	tmpPath := destPath + ".tmp"
+	f, err := os.Create(tmpPath)
+	if err != nil {
+		return fmt.Errorf("creating temp file: %w", err)
+	}
+
+	if _, err := io.Copy(f, reader); err != nil {
+		f.Close()
+		os.Remove(tmpPath)
+		return fmt.Errorf("writing file: %w", err)
+	}
+
+	if err := f.Close(); err != nil {
+		os.Remove(tmpPath)
+		return fmt.Errorf("closing temp file: %w", err)
+	}
+
+	if err := os.Rename(tmpPath, destPath); err != nil {
+		os.Remove(tmpPath)
+		return fmt.Errorf("renaming temp file: %w", err)
+	}
+
+	return nil
+}

cmd/silod/main.go

@@ -20,6 +20,7 @@ import (
 	"github.com/kindredsystems/silo/internal/config"
 	"github.com/kindredsystems/silo/internal/db"
 	"github.com/kindredsystems/silo/internal/jobdef"
+	"github.com/kindredsystems/silo/internal/modules"
 	"github.com/kindredsystems/silo/internal/schema"
 	"github.com/kindredsystems/silo/internal/storage"
 	"github.com/rs/zerolog"
@@ -64,24 +65,39 @@ func main() {
 	logger.Info().Msg("connected to database")
 
 	// Connect to storage (optional - may be externally managed)
-	var store *storage.Storage
-	if cfg.Storage.Endpoint != "" {
-		store, err = storage.Connect(ctx, storage.Config{
-			Endpoint:  cfg.Storage.Endpoint,
-			AccessKey: cfg.Storage.AccessKey,
-			SecretKey: cfg.Storage.SecretKey,
-			Bucket:    cfg.Storage.Bucket,
-			UseSSL:    cfg.Storage.UseSSL,
-			Region:    cfg.Storage.Region,
-		})
-		if err != nil {
-			logger.Warn().Err(err).Msg("failed to connect to storage - file operations disabled")
-			store = nil
+	var store storage.FileStore
+	switch cfg.Storage.Backend {
+	case "minio", "":
+		if cfg.Storage.Endpoint != "" {
+			s, connErr := storage.Connect(ctx, storage.Config{
+				Endpoint:  cfg.Storage.Endpoint,
+				AccessKey: cfg.Storage.AccessKey,
+				SecretKey: cfg.Storage.SecretKey,
+				Bucket:    cfg.Storage.Bucket,
+				UseSSL:    cfg.Storage.UseSSL,
+				Region:    cfg.Storage.Region,
+			})
+			if connErr != nil {
+				logger.Warn().Err(connErr).Msg("failed to connect to storage - file operations disabled")
+			} else {
+				store = s
+				logger.Info().Msg("connected to storage")
+			}
 		} else {
-			logger.Info().Msg("connected to storage")
+			logger.Info().Msg("storage not configured - file operations disabled")
 		}
-	} else {
-		logger.Info().Msg("storage not configured - file operations disabled")
+	case "filesystem":
+		if cfg.Storage.Filesystem.RootDir == "" {
+			logger.Fatal().Msg("storage.filesystem.root_dir is required when backend is \"filesystem\"")
+		}
+		s, fsErr := storage.NewFilesystemStore(cfg.Storage.Filesystem.RootDir)
+		if fsErr != nil {
+			logger.Fatal().Err(fsErr).Msg("failed to initialize filesystem storage")
+		}
+		store = s
+		logger.Info().Str("root", cfg.Storage.Filesystem.RootDir).Msg("connected to filesystem storage")
+	default:
+		logger.Fatal().Str("backend", cfg.Storage.Backend).Msg("unknown storage backend")
 	}
 
 	// Load schemas
@@ -219,6 +235,16 @@ func main() {
 		}
 	}
 
+	// Initialize module registry
+	registry := modules.NewRegistry()
+	if err := modules.LoadState(registry, cfg, database.Pool()); err != nil {
+		logger.Fatal().Err(err).Msg("failed to load module state")
+	}
+	for _, m := range registry.All() {
+		logger.Info().Str("module", m.ID).Bool("enabled", registry.IsEnabled(m.ID)).
+			Bool("required", m.Required).Msg("module")
+	}
+
 	// Create SSE broker and server state
 	broker := api.NewBroker(logger)
 	serverState := api.NewServerState(logger, store, broker)
@@ -232,27 +258,30 @@ func main() {
 	// Create API server
 	server := api.NewServer(logger, database, schemas, cfg.Schemas.Directory, store,
 		authService, sessionManager, oidcBackend, &cfg.Auth, broker, serverState,
-		jobDefs, cfg.Jobs.Directory)
+		jobDefs, cfg.Jobs.Directory, registry, cfg)
 	router := api.NewRouter(server, logger)
 
-	// Start background sweepers for job/runner timeouts
-	go func() {
-		ticker := time.NewTicker(time.Duration(cfg.Jobs.JobTimeoutCheck) * time.Second)
-		defer ticker.Stop()
-		for range ticker.C {
-			if n, err := jobRepo.TimeoutExpiredJobs(ctx); err != nil {
-				logger.Error().Err(err).Msg("job timeout sweep failed")
-			} else if n > 0 {
-				logger.Info().Int64("count", n).Msg("timed out expired jobs")
-			}
+	// Start background sweepers for job/runner timeouts (only when jobs module enabled)
+	if registry.IsEnabled(modules.Jobs) {
+		go func() {
+			ticker := time.NewTicker(time.Duration(cfg.Jobs.JobTimeoutCheck) * time.Second)
+			defer ticker.Stop()
+			for range ticker.C {
+				if n, err := jobRepo.TimeoutExpiredJobs(ctx); err != nil {
+					logger.Error().Err(err).Msg("job timeout sweep failed")
+				} else if n > 0 {
+					logger.Info().Int64("count", n).Msg("timed out expired jobs")
+				}
 
-			if n, err := jobRepo.ExpireStaleRunners(ctx, time.Duration(cfg.Jobs.RunnerTimeout)*time.Second); err != nil {
-				logger.Error().Err(err).Msg("runner expiry sweep failed")
-			} else if n > 0 {
-				logger.Info().Int64("count", n).Msg("expired stale runners")
+				if n, err := jobRepo.ExpireStaleRunners(ctx, time.Duration(cfg.Jobs.RunnerTimeout)*time.Second); err != nil {
+					logger.Error().Err(err).Msg("runner expiry sweep failed")
+				} else if n > 0 {
+					logger.Info().Int64("count", n).Msg("expired stale runners")
+				}
 			}
-		}
-	}()
+		}()
+		logger.Info().Msg("job/runner sweepers started")
+	}
 
 	// Create HTTP server
 	addr := fmt.Sprintf("%s:%d", cfg.Server.Host, cfg.Server.Port)

config.example.yaml

@@ -17,12 +17,17 @@ database:
   max_connections: 10
 
 storage:
+  backend: "minio" # "minio" (default) or "filesystem"
+  # MinIO/S3 settings (used when backend: "minio")
   endpoint: "localhost:9000" # Use "minio:9000" for Docker Compose
   access_key: "" # Use SILO_MINIO_ACCESS_KEY env var
   secret_key: "" # Use SILO_MINIO_SECRET_KEY env var
   bucket: "silo-files"
   use_ssl: true # Use false for Docker Compose (internal network)
   region: "us-east-1"
+  # Filesystem settings (used when backend: "filesystem")
+  # filesystem:
+  #   root_dir: "/var/lib/silo/objects"
 
 schemas:
   # Directory containing YAML schema files

deployments/config.prod.yaml

@@ -10,8 +10,6 @@
 #
 # Credentials via environment variables (set in /etc/silo/silod.env):
 #   SILO_DB_PASSWORD
-#   SILO_MINIO_ACCESS_KEY
-#   SILO_MINIO_SECRET_KEY
 #   SILO_SESSION_SECRET
 #   SILO_ADMIN_PASSWORD
 
@@ -30,12 +28,9 @@ database:
   max_connections: 20
 
 storage:
-  endpoint: "minio.example.internal:9000"
-  access_key: "" # Set via SILO_MINIO_ACCESS_KEY
-  secret_key: "" # Set via SILO_MINIO_SECRET_KEY
-  bucket: "silo-files"
-  use_ssl: true
-  region: "us-east-1"
+  backend: "filesystem"
+  filesystem:
+    root_dir: "/opt/silo/data"
 
 schemas:
   directory: "/opt/silo/schemas"

deployments/systemd/silod.env.example

@@ -6,10 +6,6 @@
 # Database: silo, User: silo
 SILO_DB_PASSWORD=
 
-# MinIO credentials (minio.example.internal)
-# User: silouser
-SILO_MINIO_ACCESS_KEY=silouser
-SILO_MINIO_SECRET_KEY=
 
 # Authentication
 # Session secret (required when auth is enabled)

docs/CONFIGURATION.md

@@ -73,25 +73,27 @@ database:
 
 ---
 
-## Storage (MinIO/S3)
+## Storage (Filesystem)
 
-| Key | Type | Default | Env Override | Description |
-|-----|------|---------|-------------|-------------|
-| `storage.endpoint` | string | — | `SILO_MINIO_ENDPOINT` | MinIO/S3 endpoint (`host:port`) |
-| `storage.access_key` | string | — | `SILO_MINIO_ACCESS_KEY` | Access key |
-| `storage.secret_key` | string | — | `SILO_MINIO_SECRET_KEY` | Secret key |
-| `storage.bucket` | string | — | — | S3 bucket name (created automatically if missing) |
-| `storage.use_ssl` | bool | `false` | — | Use HTTPS for MinIO connections |
-| `storage.region` | string | `"us-east-1"` | — | S3 region |
+Files are stored on the local filesystem under a configurable root directory.
+
+| Key | Type | Default | Description |
+|-----|------|---------|-------------|
+| `storage.backend` | string | `"filesystem"` | Storage backend (`filesystem`) |
+| `storage.filesystem.root_dir` | string | — | Root directory for file storage (required) |
 
 ```yaml
 storage:
-  endpoint: "localhost:9000"
-  access_key: ""  # use SILO_MINIO_ACCESS_KEY env var
-  secret_key: ""  # use SILO_MINIO_SECRET_KEY env var
-  bucket: "silo-files"
-  use_ssl: false
-  region: "us-east-1"
+  backend: "filesystem"
+  filesystem:
+    root_dir: "/opt/silo/data"
+```
+
+Ensure the directory exists and is writable by the `silo` user:
+
+```bash
+sudo mkdir -p /opt/silo/data
+sudo chown silo:silo /opt/silo/data
 ```
 
 ---
@@ -264,9 +266,6 @@ All environment variable overrides. These take precedence over values in `config
 | `SILO_DB_NAME` | `database.name` | PostgreSQL database name |
 | `SILO_DB_USER` | `database.user` | PostgreSQL user |
 | `SILO_DB_PASSWORD` | `database.password` | PostgreSQL password |
-| `SILO_MINIO_ENDPOINT` | `storage.endpoint` | MinIO endpoint |
-| `SILO_MINIO_ACCESS_KEY` | `storage.access_key` | MinIO access key |
-| `SILO_MINIO_SECRET_KEY` | `storage.secret_key` | MinIO secret key |
 | `SILO_SESSION_SECRET` | `auth.session_secret` | Session cookie signing secret |
 | `SILO_ADMIN_USERNAME` | `auth.local.default_admin_username` | Default admin username |
 | `SILO_ADMIN_PASSWORD` | `auth.local.default_admin_password` | Default admin password |
@@ -296,11 +295,9 @@ database:
   sslmode: "disable"
 
 storage:
-  endpoint: "localhost:9000"
-  access_key: "minioadmin"
-  secret_key: "minioadmin"
-  bucket: "silo-files"
-  use_ssl: false
+  backend: "filesystem"
+  filesystem:
+    root_dir: "./data"
 
 schemas:
   directory: "./schemas"

docs/DEPLOYMENT.md

@@ -4,7 +4,7 @@
 > instructions. This document covers ongoing maintenance and operations for an
 > existing deployment.
 
-This guide covers deploying Silo to a dedicated VM using external PostgreSQL and MinIO services.
+This guide covers deploying Silo to a dedicated VM using external PostgreSQL and local filesystem storage.
 
 ## Table of Contents
 
@@ -26,28 +26,25 @@ This guide covers deploying Silo to a dedicated VM using external PostgreSQL and
 │  │                        silod                               │ │
 │  │                   (Silo API Server)                        │ │
 │  │                      :8080                                 │ │
+│  │              Files: /opt/silo/data                         │ │
 │  └───────────────────────────────────────────────────────────┘ │
 └─────────────────────────────────────────────────────────────────┘
-              │                               │
-              ▼                               ▼
-┌─────────────────────────┐     ┌─────────────────────────────────┐
-│  psql.example.internal  │     │    minio.example.internal       │
-│      PostgreSQL 16      │     │         MinIO S3                │
-│        :5432            │     │       :9000 (API)               │
-│                         │     │       :9001 (Console)           │
-└─────────────────────────┘     └─────────────────────────────────┘
+              │
+              ▼
+┌─────────────────────────┐
+│  psql.example.internal  │
+│      PostgreSQL 16      │
+│        :5432            │
+└─────────────────────────┘
 ```
 
 ## External Services
 
-The following external services are already configured:
-
-| Service | Host | Database/Bucket | User |
-|---------|------|-----------------|------|
+| Service | Host | Database | User |
+|---------|------|----------|------|
 | PostgreSQL | psql.example.internal:5432 | silo | silo |
-| MinIO | minio.example.internal:9000 | silo-files | silouser |
 
-Migrations have been applied to the database.
+Files are stored on the local filesystem at `/opt/silo/data`. Migrations have been applied to the database.
 
 ---
 
@@ -107,21 +104,15 @@ Fill in the values:
 # Database credentials (psql.example.internal)
 SILO_DB_PASSWORD=your-database-password
 
-# MinIO credentials (minio.example.internal)
-SILO_MINIO_ACCESS_KEY=silouser
-SILO_MINIO_SECRET_KEY=your-minio-secret-key
+
 ```
 
 ### Verify External Services
 
-Before deploying, verify connectivity to external services:
+Before deploying, verify connectivity to PostgreSQL:
 
 ```bash
-# Test PostgreSQL
 psql -h psql.example.internal -U silo -d silo -c 'SELECT 1'
-
-# Test MinIO
-curl -I http://minio.example.internal:9000/minio/health/live
 ```
 
 ---
@@ -183,6 +174,7 @@ sudo -E /opt/silo/src/scripts/deploy.sh
 | File | Purpose |
 |------|---------|
 | `/opt/silo/bin/silod` | Server binary |
+| `/opt/silo/data/` | File storage root |
 | `/opt/silo/src/` | Git repository checkout |
 | `/etc/silo/config.yaml` | Server configuration |
 | `/etc/silo/silod.env` | Environment variables (secrets) |
@@ -242,7 +234,7 @@ sudo journalctl -u silod --since "2024-01-15 10:00:00"
 # Basic health check
 curl http://localhost:8080/health
 
-# Full readiness check (includes DB and MinIO)
+# Full readiness check (includes DB)
 curl http://localhost:8080/ready
 ```
 
@@ -318,24 +310,6 @@ psql -h psql.example.internal -U silo -d silo -f /opt/silo/src/migrations/008_ne
 
 3. Check `pg_hba.conf` on PostgreSQL server allows connections from this host.
 
-### Connection Refused to MinIO
-
-1. Test network connectivity:
-   ```bash
-   nc -zv minio.example.internal 9000
-   ```
-
-2. Test with curl:
-   ```bash
-   curl -I http://minio.example.internal:9000/minio/health/live
-   ```
-
-3. Check SSL settings in config match MinIO setup:
-   ```yaml
-   storage:
-     use_ssl: true  # or false
-   ```
-
 ### Health Check Fails
 
 ```bash
@@ -345,7 +319,9 @@ curl -v http://localhost:8080/ready
 
 # If ready fails but health passes, check external services
 psql -h psql.example.internal -U silo -d silo -c 'SELECT 1'
-curl http://minio.example.internal:9000/minio/health/live
+
+# Check file storage directory
+ls -la /opt/silo/data
 ```
 
 ### Build Fails
@@ -460,10 +436,9 @@ sudo systemctl reload nginx
 
 - [ ] `/etc/silo/silod.env` has mode 600 (`chmod 600`)
 - [ ] Database password is strong and unique
-- [ ] MinIO credentials are specific to silo (not admin)
 - [ ] SSL/TLS enabled for PostgreSQL (`sslmode: require`)
-- [ ] SSL/TLS enabled for MinIO (`use_ssl: true`) if available
 - [ ] HTTPS enabled via nginx reverse proxy
+- [ ] File storage directory (`/opt/silo/data`) owned by `silo` user with mode 750
 - [ ] Silod listens on localhost only (`host: 127.0.0.1`)
 - [ ] Firewall allows only ports 80, 443 (not 8080)
 - [ ] Service runs as non-root `silo` user

docs/GAP_ANALYSIS.md

@@ -76,7 +76,7 @@ See [ROADMAP.md](ROADMAP.md) for the platform roadmap and dependency tier struct
 | Append-only revision history | Complete | `internal/db/items.go` |
 | Sequential revision numbering | Complete | Database trigger |
 | Property snapshots (JSONB) | Complete | `revisions.properties` |
-| File versioning (MinIO) | Complete | `internal/storage/` |
+| File storage (filesystem) | Complete | `internal/storage/` |
 | SHA256 checksums | Complete | Captured on upload |
 | Revision comments | Complete | `revisions.comment` |
 | User attribution | Complete | `revisions.created_by` |
@@ -93,7 +93,7 @@ CREATE TABLE revisions (
     revision_number INTEGER NOT NULL,
     properties JSONB NOT NULL DEFAULT '{}',
     file_key TEXT,
-    file_version TEXT,        -- MinIO version ID
+    file_version TEXT,        -- storage version ID
     file_checksum TEXT,       -- SHA256
     file_size BIGINT,
     thumbnail_key TEXT,
@@ -283,7 +283,7 @@ Effort: Medium | Priority: Low | Risk: Low
 
 **Changes:**
 - Add thumbnail generation on file upload
-- Store in MinIO at `thumbnails/{part_number}/rev{n}.png`
+- Store at `thumbnails/{part_number}/rev{n}.png`
 - Expose via `GET /api/items/{pn}/thumbnail/{rev}`
 
 ---
@@ -377,7 +377,7 @@ internal/
     relationships.go        # BOM repository
     projects.go             # Project repository
   storage/
-    storage.go              # MinIO file storage helpers
+    storage.go              # File storage helpers
 migrations/
   001_initial.sql           # Core schema
   ...
@@ -572,7 +572,7 @@ Reporting capabilities are absent. Basic reports (item counts, revision activity
 
 | Feature | SOLIDWORKS PDM | Silo Status | Priority | Complexity |
 |---------|---------------|-------------|----------|------------|
-| File versioning | Automatic | Full (MinIO) | - | - |
+| File versioning | Automatic | Full (filesystem) | - | - |
 | File preview | Thumbnails, 3D preview | None | Medium | Complex |
 | File conversion | PDF, DXF generation | None | Medium | Complex |
 | Replication | Multi-site sync | None | Low | Complex |

docs/INSTALL.md

@@ -3,7 +3,7 @@
 This guide covers two installation methods:
 
 - **[Option A: Docker Compose](#option-a-docker-compose)** — self-contained stack with all services. Recommended for evaluation, small teams, and environments where Docker is the standard.
-- **[Option B: Daemon Install](#option-b-daemon-install-systemd--external-services)** — systemd service with external PostgreSQL, MinIO, and optional LDAP/nginx. Recommended for production deployments integrated with existing infrastructure.
+- **[Option B: Daemon Install](#option-b-daemon-install-systemd--external-services)** — systemd service with external PostgreSQL and optional LDAP/nginx. Files are stored on the local filesystem. Recommended for production deployments integrated with existing infrastructure.
 
 Both methods produce the same result: a running Silo server with a web UI, REST API, and authentication.
 
@@ -48,7 +48,7 @@ Regardless of which method you choose:
 
 ## Option A: Docker Compose
 
-A single Docker Compose file runs everything: PostgreSQL, MinIO, OpenLDAP, and Silo. An optional nginx container can be enabled for reverse proxying.
+A single Docker Compose file runs everything: PostgreSQL, OpenLDAP, and Silo. Files are stored on the local filesystem. An optional nginx container can be enabled for reverse proxying.
 
 ### A.1 Prerequisites
 
@@ -80,7 +80,6 @@ The setup script generates credentials and configuration files:
 It prompts for:
 - Server domain (default: `localhost`)
 - PostgreSQL password (auto-generated if you press Enter)
-- MinIO credentials (auto-generated)
 - OpenLDAP admin password and initial user (auto-generated)
 - Silo local admin account (fallback when LDAP is unavailable)
 
@@ -106,7 +105,7 @@ Wait for all services to become healthy:
 docker compose -f deployments/docker-compose.allinone.yaml ps
 ```
 
-You should see `silo-postgres`, `silo-minio`, `silo-openldap`, and `silo-api` all in a healthy state.
+You should see `silo-postgres`, `silo-openldap`, and `silo-api` all in a healthy state.
 
 View logs:
 
@@ -124,7 +123,7 @@ docker compose -f deployments/docker-compose.allinone.yaml logs -f silo
 # Health check
 curl http://localhost:8080/health
 
-# Readiness check (includes database and storage connectivity)
+# Readiness check (includes database connectivity)
 curl http://localhost:8080/ready
 ```
 
@@ -226,7 +225,7 @@ The Silo container is rebuilt from the updated source. Database migrations in `m
 
 ## Option B: Daemon Install (systemd + External Services)
 
-This method runs Silo as a systemd service on a dedicated host, connecting to externally managed PostgreSQL, MinIO, and optionally LDAP services.
+This method runs Silo as a systemd service on a dedicated host, connecting to externally managed PostgreSQL and optionally LDAP services. Files are stored on the local filesystem.
 
 ### B.1 Architecture Overview
 
@@ -240,21 +239,22 @@ This method runs Silo as a systemd service on a dedicated host, connecting to ex
                     │  ┌───────▼────────┐  │
                     │  │     silod       │  │
                     │  │  (API server)   │  │
-                    │  └──┬─────────┬───┘  │
-                    └─────┼─────────┼──────┘
-                          │         │
-              ┌───────────▼──┐  ┌───▼──────────────┐
-              │ PostgreSQL 16│  │ MinIO (S3)        │
-              │   :5432      │  │ :9000 API         │
-              └──────────────┘  │ :9001 Console     │
-                                └──────────────────┘
+                    │  │  Files: /opt/   │  │
+                    │  │   silo/data     │  │
+                    │  └──────┬─────────┘  │
+                    └─────────┼────────────┘
+                              │
+                  ┌───────────▼──┐
+                  │ PostgreSQL 16│
+                  │   :5432      │
+                  └──────────────┘
 ```
 
 ### B.2 Prerequisites
 
 - Linux host (Debian/Ubuntu or RHEL/Fedora/AlmaLinux)
 - Root or sudo access
-- Network access to your PostgreSQL and MinIO servers
+- Network access to your PostgreSQL server
 
 The setup script installs Go and other build dependencies automatically.
 
@@ -281,26 +281,6 @@ Verify:
 psql -h YOUR_PG_HOST -U silo -d silo -c 'SELECT 1'
 ```
 
-#### MinIO
-
-Install MinIO and create a bucket and service account:
-
-- [MinIO quickstart](https://min.io/docs/minio/linux/index.html)
-
-```bash
-# Using the MinIO client (mc):
-mc alias set local http://YOUR_MINIO_HOST:9000 minioadmin minioadmin
-mc mb local/silo-files
-mc admin user add local silouser YOUR_MINIO_SECRET
-mc admin policy attach local readwrite --user silouser
-```
-
-Verify:
-
-```bash
-curl -I http://YOUR_MINIO_HOST:9000/minio/health/live
-```
-
 #### LDAP / FreeIPA (Optional)
 
 For LDAP authentication, you need an LDAP server with user and group entries. Options:
@@ -339,10 +319,10 @@ The script:
 4. Clones the repository
 5. Creates the environment file template
 
-To override the default service hostnames:
+To override the default database hostname:
 
 ```bash
-SILO_DB_HOST=db.example.com SILO_MINIO_HOST=s3.example.com sudo -E bash scripts/setup-host.sh
+SILO_DB_HOST=db.example.com sudo -E bash scripts/setup-host.sh
 ```
 
 ### B.5 Configure Credentials
@@ -357,10 +337,6 @@ sudo nano /etc/silo/silod.env
 # Database
 SILO_DB_PASSWORD=your-database-password
 
-# MinIO
-SILO_MINIO_ACCESS_KEY=silouser
-SILO_MINIO_SECRET_KEY=your-minio-secret
-
 # Authentication
 SILO_SESSION_SECRET=generate-a-long-random-string
 SILO_ADMIN_USERNAME=admin
@@ -379,7 +355,7 @@ Review the server configuration:
 sudo nano /etc/silo/config.yaml
 ```
 
-Update `database.host`, `storage.endpoint`, `server.base_url`, and authentication settings for your environment. See [CONFIGURATION.md](CONFIGURATION.md) for all options.
+Update `database.host`, `storage.filesystem.root_dir`, `server.base_url`, and authentication settings for your environment. See [CONFIGURATION.md](CONFIGURATION.md) for all options.
 
 ### B.6 Deploy
 
@@ -412,10 +388,10 @@ sudo /opt/silo/src/scripts/deploy.sh --restart-only
 sudo /opt/silo/src/scripts/deploy.sh --status
 ```
 
-To override the target host or database host:
+To override the target host:
 
 ```bash
-SILO_DEPLOY_TARGET=silo.example.com SILO_DB_HOST=db.example.com sudo -E scripts/deploy.sh
+SILO_DEPLOY_TARGET=silo.example.com sudo -E scripts/deploy.sh
 ```
 
 ### B.7 Set Up Nginx and TLS

docs/MODULES.md

@@ -0,0 +1,749 @@
+# Module System Specification
+
+**Status:** Draft
+**Last Updated:** 2026-02-14
+
+---
+
+## 1. Purpose
+
+Silo's module system defines the boundary between required infrastructure and optional capabilities. Each module groups a set of API endpoints, UI views, and configuration parameters. Modules can be enabled or disabled at runtime by administrators via the web UI, and clients can query which modules are active to adapt their feature set.
+
+The goal: after initial deployment (where `config.yaml` sets database, storage, and server bind), all further operational configuration happens through the admin settings UI. The YAML file becomes the bootstrap; the database becomes the runtime source of truth.
+
+---
+
+## 2. Module Registry
+
+### 2.1 Required Modules
+
+These cannot be disabled. They define what Silo *is*.
+
+| Module ID | Name | Description |
+|-----------|------|-------------|
+| `core` | Core PDM | Items, revisions, files, BOM, search, import/export, part number generation |
+| `schemas` | Schemas | Part numbering schema parsing, segment management, form descriptors |
+| `storage` | Storage | MinIO/S3 file storage, presigned uploads, versioning |
+
+### 2.2 Optional Modules
+
+| Module ID | Name | Default | Description |
+|-----------|------|---------|-------------|
+| `auth` | Authentication | `true` | Local, LDAP, OIDC authentication and RBAC |
+| `projects` | Projects | `true` | Project management and item tagging |
+| `audit` | Audit | `true` | Audit logging, completeness scoring |
+| `odoo` | Odoo ERP | `false` | Odoo integration (config, sync-log, push/pull) |
+| `freecad` | Create Integration | `true` | URI scheme, executable path, client settings |
+| `jobs` | Job Queue | `false` | Async compute jobs, runner management |
+| `dag` | Dependency DAG | `false` | Feature DAG sync, validation states, interference detection |
+
+### 2.3 Module Dependencies
+
+Some modules require others to function:
+
+| Module | Requires |
+|--------|----------|
+| `dag` | `jobs` |
+| `jobs` | `auth` (runner tokens) |
+| `odoo` | `auth` |
+
+When enabling a module, its dependencies are validated. The server rejects enabling `dag` without `jobs`. Disabling a module that others depend on shows a warning listing dependents.
+
+---
+
+## 3. Endpoint-to-Module Mapping
+
+### 3.1 `core` (required)
+
+```
+# Health
+GET    /health
+GET    /ready
+
+# Items
+GET    /api/items
+GET    /api/items/search
+GET    /api/items/by-uuid/{uuid}
+GET    /api/items/export.csv
+GET    /api/items/template.csv
+GET    /api/items/export.ods
+GET    /api/items/template.ods
+POST   /api/items
+POST   /api/items/import
+POST   /api/items/import.ods
+GET    /api/items/{partNumber}
+PUT    /api/items/{partNumber}
+DELETE /api/items/{partNumber}
+
+# Revisions
+GET    /api/items/{partNumber}/revisions
+GET    /api/items/{partNumber}/revisions/compare
+GET    /api/items/{partNumber}/revisions/{revision}
+POST   /api/items/{partNumber}/revisions
+PATCH  /api/items/{partNumber}/revisions/{revision}
+POST   /api/items/{partNumber}/revisions/{revision}/rollback
+
+# Files
+GET    /api/items/{partNumber}/files
+GET    /api/items/{partNumber}/file
+GET    /api/items/{partNumber}/file/{revision}
+POST   /api/items/{partNumber}/file
+POST   /api/items/{partNumber}/files
+DELETE /api/items/{partNumber}/files/{fileId}
+PUT    /api/items/{partNumber}/thumbnail
+POST   /api/uploads/presign
+
+# BOM
+GET    /api/items/{partNumber}/bom
+GET    /api/items/{partNumber}/bom/expanded
+GET    /api/items/{partNumber}/bom/flat
+GET    /api/items/{partNumber}/bom/cost
+GET    /api/items/{partNumber}/bom/where-used
+GET    /api/items/{partNumber}/bom/export.csv
+GET    /api/items/{partNumber}/bom/export.ods
+POST   /api/items/{partNumber}/bom
+POST   /api/items/{partNumber}/bom/import
+POST   /api/items/{partNumber}/bom/merge
+PUT    /api/items/{partNumber}/bom/{childPartNumber}
+DELETE /api/items/{partNumber}/bom/{childPartNumber}
+
+# .kc Metadata
+GET    /api/items/{partNumber}/metadata
+PUT    /api/items/{partNumber}/metadata
+PATCH  /api/items/{partNumber}/metadata/lifecycle
+PATCH  /api/items/{partNumber}/metadata/tags
+
+# .kc Dependencies
+GET    /api/items/{partNumber}/dependencies
+GET    /api/items/{partNumber}/dependencies/resolve
+
+# .kc Macros
+GET    /api/items/{partNumber}/macros
+GET    /api/items/{partNumber}/macros/{filename}
+
+# Part Number Generation
+POST   /api/generate-part-number
+
+# Sheets
+POST   /api/sheets/diff
+
+# Settings & Modules (admin)
+GET    /api/modules
+GET    /api/admin/settings
+GET    /api/admin/settings/{module}
+PUT    /api/admin/settings/{module}
+POST   /api/admin/settings/{module}/test
+```
+
+### 3.2 `schemas` (required)
+
+```
+GET    /api/schemas
+GET    /api/schemas/{name}
+GET    /api/schemas/{name}/form
+POST   /api/schemas/{name}/segments/{segment}/values
+PUT    /api/schemas/{name}/segments/{segment}/values/{code}
+DELETE /api/schemas/{name}/segments/{segment}/values/{code}
+```
+
+### 3.3 `storage` (required)
+
+No dedicated endpoints — storage is consumed internally by file upload/download in `core`. Exposed through admin settings for connection status visibility.
+
+### 3.4 `auth`
+
+```
+# Public (login flow)
+GET    /login
+POST   /login
+POST   /logout
+GET    /auth/oidc
+GET    /auth/callback
+
+# Authenticated
+GET    /api/auth/me
+GET    /api/auth/tokens
+POST   /api/auth/tokens
+DELETE /api/auth/tokens/{id}
+
+# Web UI
+GET    /settings                          (account info, tokens)
+POST   /settings/tokens
+POST   /settings/tokens/{id}/revoke
+```
+
+When `auth` is disabled, all routes are open and a synthetic `dev` admin user is injected (current behavior).
+
+### 3.5 `projects`
+
+```
+GET    /api/projects
+GET    /api/projects/{code}
+GET    /api/projects/{code}/items
+GET    /api/projects/{code}/sheet.ods
+POST   /api/projects
+PUT    /api/projects/{code}
+DELETE /api/projects/{code}
+
+# Item-project tagging
+GET    /api/items/{partNumber}/projects
+POST   /api/items/{partNumber}/projects
+DELETE /api/items/{partNumber}/projects/{code}
+```
+
+When disabled: project tag endpoints return `404`, project columns are hidden in UI list views, project filter is removed from item search.
+
+### 3.6 `audit`
+
+```
+GET    /api/audit/completeness
+GET    /api/audit/completeness/{partNumber}
+```
+
+When disabled: audit log table continues to receive writes (it's part of core middleware), but the completeness scoring endpoints and the Audit page in the web UI are hidden. Future: retention policies, export, and compliance reporting endpoints live here.
+
+### 3.7 `odoo`
+
+```
+GET    /api/integrations/odoo/config
+GET    /api/integrations/odoo/sync-log
+PUT    /api/integrations/odoo/config
+POST   /api/integrations/odoo/test-connection
+POST   /api/integrations/odoo/sync/push/{partNumber}
+POST   /api/integrations/odoo/sync/pull/{odooId}
+```
+
+### 3.8 `freecad`
+
+No dedicated API endpoints currently. Configures URI scheme and executable path used by the web UI's "Open in Create" links and by CLI operations. Future: client configuration distribution endpoint.
+
+### 3.9 `jobs`
+
+```
+# User-facing
+GET    /api/jobs
+GET    /api/jobs/{jobID}
+GET    /api/jobs/{jobID}/logs
+POST   /api/jobs
+POST   /api/jobs/{jobID}/cancel
+
+# Job definitions
+GET    /api/job-definitions
+GET    /api/job-definitions/{name}
+POST   /api/job-definitions/reload
+
+# Runner management (admin)
+GET    /api/runners
+POST   /api/runners
+DELETE /api/runners/{runnerID}
+
+# Runner-facing (runner token auth)
+POST   /api/runner/heartbeat
+POST   /api/runner/claim
+PUT    /api/runner/jobs/{jobID}/progress
+POST   /api/runner/jobs/{jobID}/complete
+POST   /api/runner/jobs/{jobID}/fail
+POST   /api/runner/jobs/{jobID}/log
+PUT    /api/runner/jobs/{jobID}/dag
+```
+
+### 3.10 `dag`
+
+```
+GET    /api/items/{partNumber}/dag
+GET    /api/items/{partNumber}/dag/forward-cone/{nodeKey}
+GET    /api/items/{partNumber}/dag/dirty
+PUT    /api/items/{partNumber}/dag
+POST   /api/items/{partNumber}/dag/mark-dirty/{nodeKey}
+```
+
+---
+
+## 4. Disabled Module Behavior
+
+When a module is disabled:
+
+1. **API routes** registered by that module return `404 Not Found` with body `{"error": "module '<id>' is not enabled"}`.
+2. **Web UI** hides the module's navigation entry, page, and any inline UI elements (e.g., project tags on item cards).
+3. **SSE events** from the module are not broadcast.
+4. **Background goroutines** (e.g., job timeout sweeper, runner heartbeat checker) are not started.
+5. **Database tables** are not dropped — they remain for re-enablement. No data loss on disable/enable cycle.
+
+Implementation: each module's route group is wrapped in a middleware check:
+
+```go
+func RequireModule(id string) func(http.Handler) http.Handler {
+    return func(next http.Handler) http.Handler {
+        return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+            if !modules.IsEnabled(id) {
+                http.Error(w, `{"error":"module '`+id+`' is not enabled"}`, 404)
+                return
+            }
+            next.ServeHTTP(w, r)
+        })
+    }
+}
+```
+
+---
+
+## 5. Configuration Persistence
+
+### 5.1 Precedence
+
+```
+Environment variables  (highest — always wins, secrets live here)
+        ↓
+Database overrides     (admin UI writes here)
+        ↓
+config.yaml            (lowest — bootstrap defaults)
+```
+
+### 5.2 Database Table
+
+```sql
+-- Migration 014_settings.sql
+CREATE TABLE settings_overrides (
+    key         TEXT PRIMARY KEY,          -- dotted path: "auth.ldap.enabled"
+    value       JSONB NOT NULL,           -- typed value
+    updated_by  TEXT NOT NULL,            -- username
+    updated_at  TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE TABLE module_state (
+    module_id   TEXT PRIMARY KEY,         -- "auth", "projects", etc.
+    enabled     BOOLEAN NOT NULL,
+    updated_by  TEXT NOT NULL,
+    updated_at  TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+```
+
+### 5.3 Load Sequence
+
+On startup:
+
+1. Parse `config.yaml` into Go config struct.
+2. Query `settings_overrides` — merge each key into the struct using dotted path resolution.
+3. Apply environment variable overrides (existing `SILO_*` vars).
+4. Query `module_state` — override default enabled/disabled from YAML.
+5. Validate module dependencies.
+6. Register only enabled modules' route groups.
+7. Start only enabled modules' background goroutines.
+
+### 5.4 Runtime Updates
+
+When an admin saves settings via `PUT /api/admin/settings/{module}`:
+
+1. Validate the payload against the module's config schema.
+2. Write changed keys to `settings_overrides`.
+3. Update `module_state` if `enabled` changed.
+4. Apply changes to the in-memory config (hot reload where safe).
+5. Broadcast `settings.changed` SSE event with `{module, enabled, changed_keys}`.
+6. For changes that require restart (e.g., `server.port`, `database.*`), return a `restart_required: true` flag in the response. The UI shows a banner.
+
+### 5.5 What Requires Restart
+
+| Config Area | Hot Reload | Restart Required |
+|-------------|-----------|------------------|
+| Module enable/disable | Yes | No |
+| `auth.*` provider toggles | Yes | No |
+| `auth.cors.allowed_origins` | Yes | No |
+| `odoo.*` connection settings | Yes | No |
+| `freecad.*` | Yes | No |
+| `jobs.*` timeouts, directory | Yes | No |
+| `server.host`, `server.port` | No | Yes |
+| `database.*` | No | Yes |
+| `storage.*` | No | Yes |
+| `schemas.directory` | No | Yes |
+
+---
+
+## 6. Public Module Discovery Endpoint
+
+```
+GET /api/modules
+```
+
+**No authentication required.** Clients need this pre-login to know whether OIDC is available, whether projects exist, etc.
+
+### 6.1 Response
+
+```json
+{
+  "modules": {
+    "core": {
+      "enabled": true,
+      "required": true,
+      "name": "Core PDM",
+      "version": "0.2"
+    },
+    "schemas": {
+      "enabled": true,
+      "required": true,
+      "name": "Schemas"
+    },
+    "storage": {
+      "enabled": true,
+      "required": true,
+      "name": "Storage"
+    },
+    "auth": {
+      "enabled": true,
+      "required": false,
+      "name": "Authentication",
+      "config": {
+        "local_enabled": true,
+        "ldap_enabled": true,
+        "oidc_enabled": true,
+        "oidc_issuer_url": "https://keycloak.example.com/realms/silo"
+      }
+    },
+    "projects": {
+      "enabled": true,
+      "required": false,
+      "name": "Projects"
+    },
+    "audit": {
+      "enabled": true,
+      "required": false,
+      "name": "Audit"
+    },
+    "odoo": {
+      "enabled": false,
+      "required": false,
+      "name": "Odoo ERP"
+    },
+    "freecad": {
+      "enabled": true,
+      "required": false,
+      "name": "Create Integration",
+      "config": {
+        "uri_scheme": "silo"
+      }
+    },
+    "jobs": {
+      "enabled": false,
+      "required": false,
+      "name": "Job Queue"
+    },
+    "dag": {
+      "enabled": false,
+      "required": false,
+      "name": "Dependency DAG",
+      "depends_on": ["jobs"]
+    }
+  },
+  "server": {
+    "version": "0.2",
+    "read_only": false
+  }
+}
+```
+
+The `config` sub-object exposes only public, non-secret metadata needed by clients. Never includes passwords, tokens, or secret keys.
+
+---
+
+## 7. Admin Settings Endpoints
+
+### 7.1 Get All Settings
+
+```
+GET /api/admin/settings
+Authorization: Bearer <admin token>
+```
+
+Returns full config grouped by module with secrets redacted:
+
+```json
+{
+  "core": {
+    "server": {
+      "host": "0.0.0.0",
+      "port": 8080,
+      "base_url": "https://silo.example.com",
+      "read_only": false
+    }
+  },
+  "schemas": {
+    "directory": "/etc/silo/schemas",
+    "default": "kindred-rd"
+  },
+  "storage": {
+    "endpoint": "minio:9000",
+    "bucket": "silo-files",
+    "access_key": "****",
+    "secret_key": "****",
+    "use_ssl": false,
+    "region": "us-east-1",
+    "status": "connected"
+  },
+  "database": {
+    "host": "postgres",
+    "port": 5432,
+    "name": "silo",
+    "user": "silo",
+    "password": "****",
+    "sslmode": "disable",
+    "max_connections": 10,
+    "status": "connected"
+  },
+  "auth": {
+    "enabled": true,
+    "session_secret": "****",
+    "local": { "enabled": true },
+    "ldap": {
+      "enabled": true,
+      "url": "ldaps://ipa.example.com",
+      "base_dn": "dc=kindred,dc=internal",
+      "user_search_dn": "cn=users,cn=accounts,dc=kindred,dc=internal",
+      "bind_password": "****",
+      "role_mapping": { "...": "..." }
+    },
+    "oidc": {
+      "enabled": true,
+      "issuer_url": "https://keycloak.example.com/realms/silo",
+      "client_id": "silo",
+      "client_secret": "****",
+      "redirect_url": "https://silo.example.com/auth/callback"
+    },
+    "cors": { "allowed_origins": ["https://silo.example.com"] }
+  },
+  "projects": { "enabled": true },
+  "audit": { "enabled": true },
+  "odoo": { "enabled": false, "url": "", "database": "", "username": "" },
+  "freecad": { "uri_scheme": "silo", "executable": "" },
+  "jobs": {
+    "enabled": false,
+    "directory": "/etc/silo/jobdefs",
+    "runner_timeout": 90,
+    "job_timeout_check": 30,
+    "default_priority": 100
+  },
+  "dag": { "enabled": false }
+}
+```
+
+### 7.2 Get Module Settings
+
+```
+GET /api/admin/settings/{module}
+```
+
+Returns just the module's config block.
+
+### 7.3 Update Module Settings
+
+```
+PUT /api/admin/settings/{module}
+Content-Type: application/json
+
+{
+  "enabled": true,
+  "ldap": {
+    "enabled": true,
+    "url": "ldaps://ipa.example.com"
+  }
+}
+```
+
+**Response:**
+
+```json
+{
+  "updated": ["auth.ldap.enabled", "auth.ldap.url"],
+  "restart_required": false
+}
+```
+
+### 7.4 Test Connectivity
+
+```
+POST /api/admin/settings/{module}/test
+```
+
+Available for modules with external connections:
+
+| Module | Test Action |
+|--------|------------|
+| `storage` | Ping MinIO, verify bucket exists |
+| `auth` (ldap) | Attempt LDAP bind with configured credentials |
+| `auth` (oidc) | Fetch OIDC discovery document from issuer URL |
+| `odoo` | Attempt XML-RPC connection to Odoo |
+
+**Response:**
+
+```json
+{
+  "success": true,
+  "message": "LDAP bind successful",
+  "latency_ms": 42
+}
+```
+
+---
+
+## 8. Config YAML Changes
+
+The existing `config.yaml` gains a `modules` section. Existing top-level keys remain for backward compatibility — the module system reads from both locations.
+
+```yaml
+# Existing keys (unchanged, still work)
+server:
+  host: "0.0.0.0"
+  port: 8080
+
+database:
+  host: postgres
+  port: 5432
+  name: silo
+  user: silo
+  password: silodev
+  sslmode: disable
+
+storage:
+  endpoint: minio:9000
+  bucket: silo-files
+  access_key: silominio
+  secret_key: silominiosecret
+  use_ssl: false
+
+schemas:
+  directory: /etc/silo/schemas
+
+auth:
+  enabled: true
+  session_secret: change-me
+  local:
+    enabled: true
+
+# New: explicit module toggles (optional, defaults shown)
+modules:
+  projects:
+    enabled: true
+  audit:
+    enabled: true
+  odoo:
+    enabled: false
+  freecad:
+    enabled: true
+    uri_scheme: silo
+  jobs:
+    enabled: false
+    directory: /etc/silo/jobdefs
+    runner_timeout: 90
+    job_timeout_check: 30
+    default_priority: 100
+  dag:
+    enabled: false
+```
+
+If a module is not listed under `modules:`, its default enabled state from Section 2.2 applies. The `auth.enabled` field continues to control the `auth` module (no duplication under `modules:`).
+
+---
+
+## 9. SSE Events
+
+```
+settings.changed    {module, enabled, changed_keys[], updated_by}
+```
+
+Broadcast on any admin settings change. The web UI listens for this to:
+
+- Show/hide navigation entries when modules are toggled.
+- Display a "Settings updated by another admin" toast.
+- Show a "Restart required" banner when flagged.
+
+---
+
+## 10. Web UI — Admin Settings Page
+
+The Settings page (`/settings`) is restructured into sections:
+
+### 10.1 Existing (unchanged)
+
+- **Account** — username, display name, email, auth source, role badge.
+- **API Tokens** — create, list, revoke.
+
+### 10.2 New: Module Configuration (admin only)
+
+Visible only to admin users. Each module gets a collapsible card:
+
+```
+┌─────────────────────────────────────────────────────┐
+│ [toggle] Authentication                    [status] │
+├─────────────────────────────────────────────────────┤
+│                                                     │
+│  ── Local Auth ──────────────────────────────────── │
+│  Enabled: [toggle]                                  │
+│                                                     │
+│  ── LDAP / FreeIPA ──────────────────────────────── │
+│  Enabled: [toggle]                                  │
+│  URL:     [ldaps://ipa.example.com        ]         │
+│  Base DN: [dc=kindred,dc=internal         ]  [Test] │
+│                                                     │
+│  ── OIDC / Keycloak ────────────────────────────── │
+│  Enabled:    [toggle]                               │
+│  Issuer URL: [https://keycloak.example.com] [Test]  │
+│  Client ID:  [silo                        ]         │
+│                                                     │
+│  ── CORS ────────────────────────────────────────── │
+│  Allowed Origins: [tag input]                       │
+│                                                     │
+│                                          [Save]     │
+└─────────────────────────────────────────────────────┘
+```
+
+Module cards for required modules (`core`, `schemas`, `storage`) show their status and config but have no enable/disable toggle.
+
+Status indicators per module:
+
+| Status | Badge | Meaning |
+|--------|-------|---------|
+| Active | `green` | Enabled and operational |
+| Disabled | `overlay1` | Toggled off |
+| Error | `red` | Enabled but connectivity or config issue |
+| Setup Required | `yellow` | Enabled but missing required config (e.g., LDAP URL empty) |
+
+### 10.3 Infrastructure Section (admin, read-only)
+
+Shows connection status for required infrastructure:
+
+- **Database** — host, port, name, connection pool usage, status badge.
+- **Storage** — endpoint, bucket, SSL, status badge.
+
+These are read-only in the UI (setup-only via YAML/env). The "Test" button is available to verify connectivity.
+
+---
+
+## 11. Implementation Order
+
+1. **Migration 014** — `settings_overrides` and `module_state` tables.
+2. **Config loader refactor** — YAML → DB merge → env override pipeline.
+3. **Module registry** — Go struct defining all modules with metadata, dependencies, defaults.
+4. **`GET /api/modules`** — public endpoint, no auth.
+5. **`RequireModule` middleware** — gate route groups by module state.
+6. **Admin settings API** — `GET/PUT /api/admin/settings/{module}`, test endpoints.
+7. **Web UI settings page** — module cards with toggles, config forms, test buttons.
+8. **SSE integration** — `settings.changed` event broadcast.
+
+---
+
+## 12. Future Considerations
+
+- **Module manifest format** — per ROADMAP.md, each module will eventually declare routes, views, hooks, and permissions via a manifest. This spec covers the runtime module registry; the manifest format is TBD.
+- **Custom modules** — third-party modules that register against the endpoint registry. Requires the manifest contract and a plugin loading mechanism.
+- **Per-module permissions** — beyond the current role hierarchy, modules may define fine-grained scopes (e.g., `jobs:admin`, `dag:write`).
+- **Location & Inventory module** — when the Location/Inventory API is implemented (tables already exist), it becomes a new optional module.
+- **Notifications module** — per ROADMAP.md Tier 1, notifications/subscriptions will be a dedicated module.
+
+---
+
+## 13. References
+
+- [CONFIGURATION.md](CONFIGURATION.md) — Current config reference
+- [ROADMAP.md](ROADMAP.md) — Module manifest, API endpoint registry
+- [AUTH.md](AUTH.md) — Authentication architecture
+- [WORKERS.md](WORKERS.md) — Job queue system
+- [DAG.md](DAG.md) — Dependency DAG specification
+- [SPECIFICATION.md](SPECIFICATION.md) — Full endpoint listing

docs/ROADMAP.md

@@ -88,7 +88,7 @@ Everything depends on these. They define what Silo *is*.
 | Component | Description | Status |
 |-----------|-------------|--------|
 | **Core Silo** | Part/assembly storage, version control, auth, base REST API | Complete |
-| **.kc Format Spec** | File format contract between Create and Silo | Not Started |
+| **.kc Format Spec** | File format contract between Create and Silo | Complete |
 | **API Endpoint Registry** | Module discovery, dynamic UI rendering, health checks | Not Started |
 | **Web UI Shell** | App launcher, breadcrumbs, view framework, module rendering | Partial |
 | **Python Scripting Engine** | Server-side hook execution, module extension point | Not Started |
@@ -313,7 +313,7 @@ For full SOLIDWORKS PDM comparison tables, see [GAP_ANALYSIS.md Appendix C](GAP_
 - Rollback functionality
 
 #### File Management
-- MinIO integration with versioning
+- Filesystem-based file storage
 - File upload/download via REST API
 - SHA256 checksums for integrity
 - Storage path: `items/{partNumber}/rev{N}.FCStd`
@@ -377,8 +377,8 @@ For full SOLIDWORKS PDM comparison tables, see [GAP_ANALYSIS.md Appendix C](GAP_
 
 ## Appendix B: Phase 1 Detailed Tasks
 
-### 1.1 MinIO Integration -- COMPLETE
-- [x] MinIO service configured in Docker Compose
+### 1.1 File Storage -- COMPLETE
+- [x] Filesystem storage backend
 - [x] File upload via REST API
 - [x] File download via REST API (latest and by revision)
 - [x] SHA256 checksums on upload

docs/SPECIFICATION.md

@@ -37,7 +37,7 @@ Silo treats **part numbering schemas as configuration, not code**. Multiple numb
                               ▼
 ┌─────────────────────────────────────────────────────────────┐
 │                   Silo Server (silod)                        │
-│  - REST API (78 endpoints)                                  │
+│  - REST API (86 endpoints)                                  │
 │  - Authentication (local, LDAP, OIDC)                       │
 │  - Schema parsing and validation                            │
 │  - Part number generation engine                            │
@@ -49,9 +49,9 @@ Silo treats **part numbering schemas as configuration, not code**. Multiple numb
               ┌───────────────┴───────────────┐
               ▼                               ▼
 ┌─────────────────────────┐     ┌─────────────────────────────┐
-│   PostgreSQL            │     │   MinIO                     │
+│   PostgreSQL            │     │   Local Filesystem          │
 │   (psql.example.internal)│     │   - File storage            │
-│   - Item metadata       │     │   - Versioned objects       │
+│   - Item metadata       │     │   - Revision files          │
 │   - Relationships       │     │   - Thumbnails              │
 │   - Revision history    │     │                             │
 │   - Auth / Sessions     │     │                             │
@@ -64,7 +64,7 @@ Silo treats **part numbering schemas as configuration, not code**. Multiple numb
 | Component | Technology | Notes |
 |-----------|------------|-------|
 | Database | PostgreSQL 16 | Existing instance at psql.example.internal |
-| File Storage | MinIO | S3-compatible, versioning enabled |
+| File Storage | Local filesystem | Files stored under configurable root directory |
 | CLI & API Server | Go (1.24) | chi/v5 router, pgx/v5 driver, zerolog |
 | Authentication | Multi-backend | Local (bcrypt), LDAP/FreeIPA, OIDC/Keycloak |
 | Sessions | PostgreSQL pgxstore | alexedwards/scs, 24h lifetime |
@@ -83,7 +83,7 @@ An **item** is the fundamental entity. Items have:
 - **Properties** (key-value pairs, schema-defined and custom)
 - **Relationships** to other items
 - **Revisions** (append-only history)
-- **Files** (optional, stored in MinIO)
+- **Files** (optional, stored on the local filesystem)
 - **Location** (optional physical inventory location)
 
 ### 3.2 Database Schema (Conceptual)
@@ -115,7 +115,7 @@ CREATE TABLE revisions (
     item_id UUID REFERENCES items(id) NOT NULL,
     revision_number INTEGER NOT NULL,
     properties JSONB NOT NULL,  -- all properties at this revision
-    file_version TEXT,  -- MinIO version ID if applicable
+    file_version TEXT,  -- storage version ID if applicable
     created_at TIMESTAMPTZ DEFAULT now(),
     created_by TEXT,  -- user identifier (future: LDAP DN)
     comment TEXT,
@@ -345,7 +345,7 @@ CAD workbench and spreadsheet extension implementations are maintained in separa
 
 ### 5.1 File Storage Strategy
 
-Files are stored as whole objects in MinIO with versioning enabled. Storage path convention: `items/{partNumber}/rev{N}.ext`. SHA-256 checksums are captured on upload for integrity verification.
+Files are stored on the local filesystem under a configurable root directory. Storage path convention: `items/{partNumber}/rev{N}.ext`. SHA-256 checksums are captured on upload for integrity verification.
 
 Future option: exploded storage (unpack ZIP-based CAD archives for better diffing).
 
@@ -439,7 +439,7 @@ Revisions are created explicitly by user action (not automatic):
 ### 7.3 Revision vs. File Version
 
 - **Revision**: Silo metadata revision (tracked in PostgreSQL)
-- **File Version**: MinIO object version (automatic on upload)
+- **File Version**: File on disk corresponding to a revision
 
 A single Silo revision may span multiple file uploads during editing. Only committed revisions create formal revision records.
 
@@ -598,12 +598,12 @@ See [AUTH.md](AUTH.md) for full architecture details and [AUTH_USER_GUIDE.md](AU
 
 ## 11. API Design
 
-### 11.1 REST Endpoints (78 Implemented)
+### 11.1 REST Endpoints (86 Implemented)
 
 ```
 # Health (no auth)
 GET    /health                                              # Basic health check
-GET    /ready                                               # Readiness (DB + MinIO)
+GET    /ready                                               # Readiness (DB)
 
 # Auth (no auth required)
 GET    /login                                               # Login page
@@ -624,8 +624,8 @@ GET    /api/auth/tokens                                     # List user's API to
 POST   /api/auth/tokens                                     # Create API token
 DELETE /api/auth/tokens/{id}                                # Revoke API token
 
-# Presigned Uploads (editor)
-POST   /api/uploads/presign                                 # Get presigned MinIO upload URL [editor]
+# Direct Uploads (editor)
+POST   /api/uploads/presign                                 # Get upload URL [editor]
 
 # Schemas (read: viewer, write: editor)
 GET    /api/schemas                                         # List all schemas
@@ -697,6 +697,20 @@ POST   /api/items/{partNumber}/bom/merge                    # Merge BOM from ODS
 PUT    /api/items/{partNumber}/bom/{childPartNumber}        # Update BOM entry [editor]
 DELETE /api/items/{partNumber}/bom/{childPartNumber}        # Remove BOM entry [editor]
 
+# .kc Metadata (read: viewer, write: editor)
+GET    /api/items/{partNumber}/metadata                     # Get indexed .kc metadata
+PUT    /api/items/{partNumber}/metadata                     # Update metadata fields [editor]
+PATCH  /api/items/{partNumber}/metadata/lifecycle           # Transition lifecycle state [editor]
+PATCH  /api/items/{partNumber}/metadata/tags                # Add/remove tags [editor]
+
+# .kc Dependencies (viewer)
+GET    /api/items/{partNumber}/dependencies                 # List raw dependencies
+GET    /api/items/{partNumber}/dependencies/resolve         # Resolve UUIDs to part numbers + file availability
+
+# .kc Macros (viewer)
+GET    /api/items/{partNumber}/macros                       # List registered macros
+GET    /api/items/{partNumber}/macros/{filename}            # Get macro source content
+
 # Audit (viewer)
 GET    /api/audit/completeness                              # Item completeness scores
 GET    /api/audit/completeness/{partNumber}                 # Item detail breakdown
@@ -735,6 +749,139 @@ POST   /api/inventory/{partNumber}/move
 
 ---
 
+## 11.3 .kc File Integration
+
+Silo supports the `.kc` file format — a ZIP archive that is a superset of FreeCAD's `.fcstd`. A `.kc` file contains everything an `.fcstd` does, plus a `silo/` directory with platform metadata.
+
+#### Standard entries (preserved as-is)
+
+`Document.xml`, `GuiDocument.xml`, BREP geometry files (`.brp`), `thumbnails/`
+
+#### Silo entries (`silo/` directory)
+
+| Path | Purpose |
+|------|---------|
+| `silo/manifest.json` | Instance origin, part UUID, revision hash, `.kc` schema version |
+| `silo/metadata.json` | Custom schema field values, tags, lifecycle state |
+| `silo/history.json` | Local revision log (server-generated on checkout) |
+| `silo/dependencies.json` | Assembly link references by Silo UUID |
+| `silo/macros/*.py` | Embedded macro scripts bound to this part |
+
+#### Commit-time extraction
+
+When a `.kc` file is uploaded via `POST /api/items/{partNumber}/file`, the server:
+
+1. Opens the ZIP and scans for `silo/` entries
+2. Parses `silo/manifest.json` and validates the UUID matches the item
+3. Upserts `silo/metadata.json` fields into the `item_metadata` table
+4. Replaces `silo/dependencies.json` entries in the `item_dependencies` table
+5. Replaces `silo/macros/*.py` entries in the `item_macros` table
+6. Broadcasts SSE events: `metadata.updated`, `dependencies.changed`, `macros.changed`
+
+Extraction is best-effort — failures are logged as warnings but do not block the upload.
+
+#### Checkout-time packing
+
+When a `.kc` file is downloaded via `GET /api/items/{partNumber}/file/{revision}`, the server repacks the `silo/` directory with current database state:
+
+- `silo/manifest.json` — current item UUID and metadata freshness
+- `silo/metadata.json` — latest schema fields, tags, lifecycle state
+- `silo/history.json` — last 20 revisions from the database
+- `silo/dependencies.json` — current dependency list from `item_dependencies`
+
+Non-silo ZIP entries are passed through unchanged. If the file is a plain `.fcstd` (no `silo/` directory), it is served as-is.
+
+ETag caching: the server computes an ETag from `revision_number:metadata.updated_at` and returns `304 Not Modified` when the client's `If-None-Match` header matches.
+
+#### Lifecycle state machine
+
+The `lifecycle_state` field in `item_metadata` follows this state machine:
+
+```
+draft → review → released → obsolete
+  ↑        ↓
+  └────────┘
+```
+
+Valid transitions are enforced by `PATCH /metadata/lifecycle`. Invalid transitions return `422 Unprocessable Entity`.
+
+#### Metadata response shape
+
+```json
+{
+  "schema_name": "kindred-rd",
+  "lifecycle_state": "draft",
+  "tags": ["prototype", "v2"],
+  "fields": {"material": "AL6061", "finish": "anodized"},
+  "manifest": {
+    "uuid": "550e8400-e29b-41d4-a716-446655440000",
+    "silo_instance": "silo.example.com",
+    "revision_hash": "abc123",
+    "kc_version": "1.0"
+  },
+  "updated_at": "2026-02-18T12:00:00Z",
+  "updated_by": "forbes"
+}
+```
+
+#### Dependency response shape
+
+```json
+[
+  {
+    "uuid": "550e8400-...",
+    "part_number": "F01-0042",
+    "revision": 3,
+    "quantity": 4.0,
+    "label": "M5 Bolt",
+    "relationship": "component"
+  }
+]
+```
+
+#### Resolved dependency response shape
+
+```json
+[
+  {
+    "uuid": "550e8400-...",
+    "part_number": "F01-0042",
+    "label": "M5 Bolt",
+    "revision": 3,
+    "quantity": 4.0,
+    "resolved": true,
+    "file_available": true
+  }
+]
+```
+
+#### Macro list response shape
+
+```json
+[
+  {"filename": "validate_dims.py", "trigger": "manual", "revision_number": 5}
+]
+```
+
+#### Macro detail response shape
+
+```json
+{
+  "filename": "validate_dims.py",
+  "trigger": "manual",
+  "content": "import FreeCAD\n...",
+  "revision_number": 5
+}
+```
+
+#### Database tables (migration 018)
+
+- `item_metadata` — schema fields, lifecycle state, tags, manifest info
+- `item_dependencies` — parent/child UUID references with quantity and relationship type
+- `item_macros` — filename, trigger type, source content, indexed per item
+
+---
+
 ## 12. MVP Scope
 
 ### 12.1 Implemented
@@ -743,8 +890,8 @@ POST   /api/inventory/{partNumber}/move
 - [x] YAML schema parser for part numbering
 - [x] Part number generation engine
 - [x] CLI tool (`cmd/silo`)
-- [x] API server (`cmd/silod`) with 78 endpoints
-- [x] MinIO integration for file storage with versioning
+- [x] API server (`cmd/silod`) with 86 endpoints
+- [x] Filesystem-based file storage
 - [x] BOM relationships (component, alternate, reference)
 - [x] Multi-level BOM (recursive expansion with configurable depth)
 - [x] Where-used queries (reverse parent lookup)
@@ -765,6 +912,12 @@ POST   /api/inventory/{partNumber}/move
 - [x] Audit logging and completeness scoring
 - [x] CSRF protection (nosurf)
 - [x] Fuzzy search
+- [x] .kc file extraction pipeline (metadata, dependencies, macros indexed on commit)
+- [x] .kc file packing on checkout (manifest, metadata, history, dependencies)
+- [x] .kc metadata API (get, update fields, lifecycle transitions, tags)
+- [x] .kc dependency API (list, resolve with file availability)
+- [x] .kc macro API (list, get source content)
+- [x] ETag caching for .kc file downloads
 - [x] Property schema versioning framework
 - [x] Docker Compose deployment (dev and prod)
 - [x] systemd service and deployment scripts

docs/STATUS.md

@@ -10,12 +10,12 @@
 
 | Component | Status | Notes |
 |-----------|--------|-------|
-| PostgreSQL schema | Complete | 13 migrations applied |
+| PostgreSQL schema | Complete | 18 migrations applied |
 | YAML schema parser | Complete | Supports enum, serial, constant, string segments |
 | Part number generator | Complete | Scoped sequences, category-based format |
-| API server (`silod`) | Complete | 78 REST endpoints via chi/v5 |
+| API server (`silod`) | Complete | 86 REST endpoints via chi/v5 |
 | CLI tool (`silo`) | Complete | Item registration and management |
-| MinIO file storage | Complete | Upload, download, versioning, checksums |
+| Filesystem file storage | Complete | Upload, download, checksums |
 | Revision control | Complete | Append-only history, rollback, comparison, status/labels |
 | Project management | Complete | CRUD, many-to-many item tagging |
 | CSV import/export | Complete | Dry-run validation, template generation |
@@ -29,7 +29,12 @@
 | CSRF protection | Complete | nosurf on web forms |
 | Fuzzy search | Complete | sahilm/fuzzy library |
 | Web UI | Complete | React SPA (Vite + TypeScript), 6 pages, Catppuccin Mocha theme |
-| File attachments | Complete | Presigned uploads, item file association, thumbnails |
+| File attachments | Complete | Direct uploads, item file association, thumbnails |
+| .kc extraction pipeline | Complete | Metadata, dependencies, macros indexed on commit |
+| .kc checkout packing | Complete | Manifest, metadata, history, dependencies repacked on download |
+| .kc metadata API | Complete | GET/PUT metadata, lifecycle transitions, tag management |
+| .kc dependency API | Complete | List raw deps, resolve UUIDs to part numbers + file availability |
+| .kc macro API | Complete | List macros, get source content by filename |
 | Odoo ERP integration | Partial | Config and sync-log CRUD functional; push/pull are stubs |
 | Docker Compose | Complete | Dev and production configurations |
 | Deployment scripts | Complete | setup-host, deploy, init-db, setup-ipa-nginx |
@@ -56,7 +61,7 @@ FreeCAD workbench and LibreOffice Calc extension are maintained in separate repo
 | Service | Host | Status |
 |---------|------|--------|
 | PostgreSQL | psql.example.internal:5432 | Running |
-| MinIO | localhost:9000 (API) / :9001 (console) | Configured |
+| File Storage | /opt/silo/data (filesystem) | Configured |
 | Silo API | localhost:8080 | Builds successfully |
 
 ---
@@ -96,3 +101,8 @@ The schema defines 170 category codes across 10 groups:
 | 011_item_files.sql | Item file attachments (item_files table, thumbnail_key column) |
 | 012_bom_source.sql | BOM entry source tracking |
 | 013_move_cost_sourcing_to_props.sql | Move sourcing_link and standard_cost from item columns to revision properties |
+| 014_settings.sql | Settings overrides and module state tables |
+| 015_jobs.sql | Job queue, runner, and job log tables |
+| 016_dag.sql | Dependency DAG nodes and edges |
+| 017_locations.sql | Location hierarchy and inventory tracking |
+| 018_kc_metadata.sql | .kc metadata tables (item_metadata, item_dependencies, item_macros, item_approvals, approval_signatures) |

internal/api/auth_handlers_test.go

@@ -11,6 +11,7 @@ import (
 	"github.com/go-chi/chi/v5"
 	"github.com/kindredsystems/silo/internal/auth"
 	"github.com/kindredsystems/silo/internal/db"
+	"github.com/kindredsystems/silo/internal/modules"
 	"github.com/kindredsystems/silo/internal/schema"
 	"github.com/kindredsystems/silo/internal/testutil"
 	"github.com/rs/zerolog"
@@ -38,8 +39,10 @@ func newAuthTestServer(t *testing.T) *Server {
 		nil,     // authConfig
 		broker,
 		state,
-		nil, // jobDefs
-		"",  // jobDefsDir
+		nil,                   // jobDefs
+		"",                    // jobDefsDir
+		modules.NewRegistry(), // modules
+		nil,                   // cfg
 	)
 }
 

internal/api/bom_handlers.go

@@ -285,6 +285,8 @@ func (s *Server) HandleAddBOMEntry(w http.ResponseWriter, r *http.Request) {
 	}
 
 	writeJSON(w, http.StatusCreated, entry)
+
+	go s.triggerJobs(context.Background(), "bom_changed", parent.ID, parent)
 }
 
 // HandleUpdateBOMEntry updates an existing BOM relationship.
@@ -353,6 +355,8 @@ func (s *Server) HandleUpdateBOMEntry(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	go s.triggerJobs(context.Background(), "bom_changed", parent.ID, parent)
+
 	// Reload and return updated entry
 	entries, err := s.relationships.GetBOM(ctx, parent.ID)
 	if err == nil {
@@ -419,6 +423,8 @@ func (s *Server) HandleDeleteBOMEntry(w http.ResponseWriter, r *http.Request) {
 		Msg("BOM entry removed")
 
 	w.WriteHeader(http.StatusNoContent)
+
+	go s.triggerJobs(context.Background(), "bom_changed", parent.ID, parent)
 }
 
 // Helper functions

internal/api/bom_handlers_test.go

@@ -11,6 +11,7 @@ import (
 	"github.com/go-chi/chi/v5"
 	"github.com/kindredsystems/silo/internal/auth"
 	"github.com/kindredsystems/silo/internal/db"
+	"github.com/kindredsystems/silo/internal/modules"
 	"github.com/kindredsystems/silo/internal/schema"
 	"github.com/kindredsystems/silo/internal/testutil"
 	"github.com/rs/zerolog"
@@ -35,8 +36,10 @@ func newTestServer(t *testing.T) *Server {
 		nil, // authConfig (nil = dev mode)
 		broker,
 		state,
-		nil, // jobDefs
-		"",  // jobDefsDir
+		nil,                   // jobDefs
+		"",                    // jobDefsDir
+		modules.NewRegistry(), // modules
+		nil,                   // cfg
 	)
 }
 

internal/api/csv_handlers_test.go

@@ -13,6 +13,7 @@ import (
 	"testing"
 
 	"github.com/go-chi/chi/v5"
+	"github.com/kindredsystems/silo/internal/modules"
 	"github.com/kindredsystems/silo/internal/schema"
 	"github.com/kindredsystems/silo/internal/testutil"
 	"github.com/rs/zerolog"
@@ -64,8 +65,10 @@ func newTestServerWithSchemas(t *testing.T) *Server {
 		nil, // authConfig
 		broker,
 		state,
-		nil, // jobDefs
-		"",  // jobDefsDir
+		nil,                   // jobDefs
+		"",                    // jobDefsDir
+		modules.NewRegistry(), // modules
+		nil,                   // cfg
 	)
 }
 

internal/api/dag_handlers_test.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/go-chi/chi/v5"
 	"github.com/kindredsystems/silo/internal/db"
+	"github.com/kindredsystems/silo/internal/modules"
 	"github.com/kindredsystems/silo/internal/schema"
 	"github.com/kindredsystems/silo/internal/testutil"
 	"github.com/rs/zerolog"
@@ -29,6 +30,7 @@ func newDAGTestServer(t *testing.T) *Server {
 		nil, nil, nil, nil, nil,
 		broker, state,
 		nil, "",
+		modules.NewRegistry(), nil,
 	)
 }
 

internal/api/dependency_handlers.go

@@ -0,0 +1,125 @@
+package api
+
+import (
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/kindredsystems/silo/internal/storage"
+)
+
+// DependencyResponse is the JSON representation for GET /dependencies.
+type DependencyResponse struct {
+	UUID         string   `json:"uuid"`
+	PartNumber   *string  `json:"part_number"`
+	Revision     *int     `json:"revision"`
+	Quantity     *float64 `json:"quantity"`
+	Label        *string  `json:"label"`
+	Relationship string   `json:"relationship"`
+}
+
+// ResolvedDependencyResponse is the JSON representation for GET /dependencies/resolve.
+type ResolvedDependencyResponse struct {
+	UUID          string   `json:"uuid"`
+	PartNumber    *string  `json:"part_number"`
+	Label         *string  `json:"label"`
+	Revision      *int     `json:"revision"`
+	Quantity      *float64 `json:"quantity"`
+	Resolved      bool     `json:"resolved"`
+	FileAvailable bool     `json:"file_available"`
+}
+
+// HandleGetDependencies returns the raw dependency list for an item.
+// GET /api/items/{partNumber}/dependencies
+func (s *Server) HandleGetDependencies(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	partNumber := chi.URLParam(r, "partNumber")
+
+	item, err := s.items.GetByPartNumber(ctx, partNumber)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get item")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get item")
+		return
+	}
+	if item == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Item not found")
+		return
+	}
+
+	deps, err := s.deps.ListByItem(ctx, item.ID)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to list dependencies")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to list dependencies")
+		return
+	}
+
+	resp := make([]DependencyResponse, len(deps))
+	for i, d := range deps {
+		resp[i] = DependencyResponse{
+			UUID:         d.ChildUUID,
+			PartNumber:   d.ChildPartNumber,
+			Revision:     d.ChildRevision,
+			Quantity:     d.Quantity,
+			Label:        d.Label,
+			Relationship: d.Relationship,
+		}
+	}
+
+	writeJSON(w, http.StatusOK, resp)
+}
+
+// HandleResolveDependencies returns dependencies with UUIDs resolved to part numbers
+// and file availability status.
+// GET /api/items/{partNumber}/dependencies/resolve
+func (s *Server) HandleResolveDependencies(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	partNumber := chi.URLParam(r, "partNumber")
+
+	item, err := s.items.GetByPartNumber(ctx, partNumber)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get item")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get item")
+		return
+	}
+	if item == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Item not found")
+		return
+	}
+
+	deps, err := s.deps.Resolve(ctx, item.ID)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to resolve dependencies")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to resolve dependencies")
+		return
+	}
+
+	resp := make([]ResolvedDependencyResponse, len(deps))
+	for i, d := range deps {
+		// Use resolved part number if available, fall back to .kc-provided value.
+		pn := d.ChildPartNumber
+		rev := d.ChildRevision
+		if d.Resolved {
+			pn = d.ResolvedPartNumber
+			rev = d.ResolvedRevision
+		}
+
+		fileAvailable := false
+		if d.Resolved && pn != nil && rev != nil && s.storage != nil {
+			key := storage.FileKey(*pn, *rev)
+			if exists, err := s.storage.Exists(ctx, key); err == nil {
+				fileAvailable = exists
+			}
+		}
+
+		resp[i] = ResolvedDependencyResponse{
+			UUID:          d.ChildUUID,
+			PartNumber:    pn,
+			Label:         d.Label,
+			Revision:      rev,
+			Quantity:      d.Quantity,
+			Resolved:      d.Resolved,
+			FileAvailable: fileAvailable,
+		}
+	}
+
+	writeJSON(w, http.StatusOK, resp)
+}

internal/api/file_handlers.go

@@ -3,7 +3,9 @@ package api
 import (
 	"encoding/json"
 	"fmt"
+	"io"
 	"net/http"
+	"strconv"
 	"strings"
 	"time"
 
@@ -314,3 +316,188 @@ func (s *Server) HandleSetItemThumbnail(w http.ResponseWriter, r *http.Request)
 
 	w.WriteHeader(http.StatusNoContent)
 }
+
+// storageBackend returns the configured storage backend name, defaulting to "minio".
+func (s *Server) storageBackend() string {
+	if s.cfg != nil && s.cfg.Storage.Backend != "" {
+		return s.cfg.Storage.Backend
+	}
+	return "minio"
+}
+
+// HandleUploadItemFile accepts a multipart file upload and stores it as an item attachment.
+func (s *Server) HandleUploadItemFile(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	partNumber := chi.URLParam(r, "partNumber")
+
+	if s.storage == nil {
+		writeError(w, http.StatusServiceUnavailable, "storage_unavailable", "File storage not configured")
+		return
+	}
+
+	item, err := s.items.GetByPartNumber(ctx, partNumber)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get item")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get item")
+		return
+	}
+	if item == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Item not found")
+		return
+	}
+
+	// Parse multipart form (max 500MB)
+	if err := r.ParseMultipartForm(500 << 20); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid_form", err.Error())
+		return
+	}
+
+	file, header, err := r.FormFile("file")
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "missing_file", "File is required")
+		return
+	}
+	defer file.Close()
+
+	contentType := header.Header.Get("Content-Type")
+	if contentType == "" {
+		contentType = "application/octet-stream"
+	}
+
+	// Generate permanent key
+	fileID := uuid.New().String()
+	permanentKey := fmt.Sprintf("items/%s/files/%s/%s", item.ID, fileID, header.Filename)
+
+	// Write directly to storage
+	result, err := s.storage.Put(ctx, permanentKey, file, header.Size, contentType)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to upload file")
+		writeError(w, http.StatusInternalServerError, "upload_failed", "Failed to store file")
+		return
+	}
+
+	// Create DB record
+	itemFile := &db.ItemFile{
+		ItemID:         item.ID,
+		Filename:       header.Filename,
+		ContentType:    contentType,
+		Size:           result.Size,
+		ObjectKey:      permanentKey,
+		StorageBackend: s.storageBackend(),
+	}
+	if err := s.itemFiles.Create(ctx, itemFile); err != nil {
+		s.logger.Error().Err(err).Msg("failed to create item file record")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to save file record")
+		return
+	}
+
+	s.logger.Info().
+		Str("part_number", partNumber).
+		Str("file_id", itemFile.ID).
+		Str("filename", header.Filename).
+		Int64("size", result.Size).
+		Msg("file uploaded to item")
+
+	writeJSON(w, http.StatusCreated, itemFileToResponse(itemFile))
+}
+
+// HandleUploadItemThumbnail accepts a multipart file upload and sets it as the item thumbnail.
+func (s *Server) HandleUploadItemThumbnail(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	partNumber := chi.URLParam(r, "partNumber")
+
+	if s.storage == nil {
+		writeError(w, http.StatusServiceUnavailable, "storage_unavailable", "File storage not configured")
+		return
+	}
+
+	item, err := s.items.GetByPartNumber(ctx, partNumber)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get item")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get item")
+		return
+	}
+	if item == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Item not found")
+		return
+	}
+
+	// Parse multipart form (max 10MB for thumbnails)
+	if err := r.ParseMultipartForm(10 << 20); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid_form", err.Error())
+		return
+	}
+
+	file, header, err := r.FormFile("file")
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "missing_file", "File is required")
+		return
+	}
+	defer file.Close()
+
+	contentType := header.Header.Get("Content-Type")
+	if contentType == "" {
+		contentType = "image/png"
+	}
+
+	thumbnailKey := fmt.Sprintf("items/%s/thumbnail.png", item.ID)
+
+	if _, err := s.storage.Put(ctx, thumbnailKey, file, header.Size, contentType); err != nil {
+		s.logger.Error().Err(err).Msg("failed to upload thumbnail")
+		writeError(w, http.StatusInternalServerError, "upload_failed", "Failed to store thumbnail")
+		return
+	}
+
+	if err := s.items.SetThumbnailKey(ctx, item.ID, thumbnailKey); err != nil {
+		s.logger.Error().Err(err).Msg("failed to update thumbnail key")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to save thumbnail")
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}
+
+// HandleDownloadItemFile streams an item file attachment to the client.
+func (s *Server) HandleDownloadItemFile(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	partNumber := chi.URLParam(r, "partNumber")
+	fileID := chi.URLParam(r, "fileId")
+
+	if s.storage == nil {
+		writeError(w, http.StatusServiceUnavailable, "storage_unavailable", "File storage not configured")
+		return
+	}
+
+	item, err := s.items.GetByPartNumber(ctx, partNumber)
+	if err != nil || item == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Item not found")
+		return
+	}
+
+	file, err := s.itemFiles.Get(ctx, fileID)
+	if err != nil {
+		writeError(w, http.StatusNotFound, "not_found", "File not found")
+		return
+	}
+
+	if file.ItemID != item.ID {
+		writeError(w, http.StatusNotFound, "not_found", "File not found")
+		return
+	}
+
+	reader, err := s.storage.Get(ctx, file.ObjectKey)
+	if err != nil {
+		s.logger.Error().Err(err).Str("key", file.ObjectKey).Msg("failed to get file")
+		writeError(w, http.StatusInternalServerError, "download_failed", "Failed to retrieve file")
+		return
+	}
+	defer reader.Close()
+
+	w.Header().Set("Content-Type", file.ContentType)
+	w.Header().Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s"`, file.Filename))
+	if file.Size > 0 {
+		w.Header().Set("Content-Length", strconv.FormatInt(file.Size, 10))
+	}
+
+	io.Copy(w, reader)
+}

internal/api/handlers.go

@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"io"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -19,6 +20,8 @@ import (
 	"github.com/kindredsystems/silo/internal/config"
 	"github.com/kindredsystems/silo/internal/db"
 	"github.com/kindredsystems/silo/internal/jobdef"
+	"github.com/kindredsystems/silo/internal/kc"
+	"github.com/kindredsystems/silo/internal/modules"
 	"github.com/kindredsystems/silo/internal/partnum"
 	"github.com/kindredsystems/silo/internal/schema"
 	"github.com/kindredsystems/silo/internal/storage"
@@ -36,7 +39,7 @@ type Server struct {
 	schemas       map[string]*schema.Schema
 	schemasDir    string
 	partgen       *partnum.Generator
-	storage       *storage.Storage
+	storage       storage.FileStore
 	auth          *auth.Service
 	sessions      *scs.SessionManager
 	oidc          *auth.OIDCBackend
@@ -46,8 +49,15 @@ type Server struct {
 	serverState   *ServerState
 	dag           *db.DAGRepository
 	jobs          *db.JobRepository
+	locations     *db.LocationRepository
 	jobDefs       map[string]*jobdef.Definition
 	jobDefsDir    string
+	modules       *modules.Registry
+	cfg           *config.Config
+	settings      *db.SettingsRepository
+	metadata      *db.ItemMetadataRepository
+	deps          *db.ItemDependencyRepository
+	macros        *db.ItemMacroRepository
 }
 
 // NewServer creates a new API server.
@@ -56,7 +66,7 @@ func NewServer(
 	database *db.DB,
 	schemas map[string]*schema.Schema,
 	schemasDir string,
-	store *storage.Storage,
+	store storage.FileStore,
 	authService *auth.Service,
 	sessionManager *scs.SessionManager,
 	oidcBackend *auth.OIDCBackend,
@@ -65,6 +75,8 @@ func NewServer(
 	state *ServerState,
 	jobDefs map[string]*jobdef.Definition,
 	jobDefsDir string,
+	registry *modules.Registry,
+	cfg *config.Config,
 ) *Server {
 	items := db.NewItemRepository(database)
 	projects := db.NewProjectRepository(database)
@@ -72,6 +84,11 @@ func NewServer(
 	itemFiles := db.NewItemFileRepository(database)
 	dag := db.NewDAGRepository(database)
 	jobs := db.NewJobRepository(database)
+	settings := db.NewSettingsRepository(database)
+	locations := db.NewLocationRepository(database)
+	metadata := db.NewItemMetadataRepository(database)
+	itemDeps := db.NewItemDependencyRepository(database)
+	itemMacros := db.NewItemMacroRepository(database)
 	seqStore := &dbSequenceStore{db: database, schemas: schemas}
 	partgen := partnum.NewGenerator(schemas, seqStore)
 
@@ -94,8 +111,15 @@ func NewServer(
 		serverState:   state,
 		dag:           dag,
 		jobs:          jobs,
+		locations:     locations,
 		jobDefs:       jobDefs,
 		jobDefsDir:    jobDefsDir,
+		modules:       registry,
+		cfg:           cfg,
+		settings:      settings,
+		metadata:      metadata,
+		deps:          itemDeps,
+		macros:        itemMacros,
 	}
 }
 
@@ -166,6 +190,54 @@ func (s *Server) HandleReady(w http.ResponseWriter, r *http.Request) {
 	})
 }
 
+// HandleGetModules returns the public module discovery response.
+// No authentication required — clients call this pre-login.
+func (s *Server) HandleGetModules(w http.ResponseWriter, r *http.Request) {
+	mods := make(map[string]any, 10)
+	for _, m := range s.modules.All() {
+		entry := map[string]any{
+			"enabled":  s.modules.IsEnabled(m.ID),
+			"required": m.Required,
+			"name":     m.Name,
+		}
+		if m.Version != "" {
+			entry["version"] = m.Version
+		}
+		if len(m.DependsOn) > 0 {
+			entry["depends_on"] = m.DependsOn
+		}
+
+		// Public config (non-secret) for specific modules.
+		switch m.ID {
+		case "auth":
+			if s.cfg != nil {
+				entry["config"] = map[string]any{
+					"local_enabled":   s.cfg.Auth.Local.Enabled,
+					"ldap_enabled":    s.cfg.Auth.LDAP.Enabled,
+					"oidc_enabled":    s.cfg.Auth.OIDC.Enabled,
+					"oidc_issuer_url": s.cfg.Auth.OIDC.IssuerURL,
+				}
+			}
+		case "freecad":
+			if s.cfg != nil {
+				entry["config"] = map[string]any{
+					"uri_scheme": s.cfg.FreeCAD.URIScheme,
+				}
+			}
+		}
+
+		mods[m.ID] = entry
+	}
+
+	writeJSON(w, http.StatusOK, map[string]any{
+		"modules": mods,
+		"server": map[string]any{
+			"version":   "0.2",
+			"read_only": s.serverState.IsReadOnly(),
+		},
+	})
+}
+
 // Schema handlers
 
 // SchemaResponse represents a schema in API responses.
@@ -1591,10 +1663,14 @@ func (s *Server) HandleUploadFile(w http.ResponseWriter, r *http.Request) {
 		Int64("size", result.Size).
 		Msg("file uploaded")
 
+	// .kc metadata extraction (best-effort)
+	s.extractKCMetadata(ctx, item, fileKey, rev)
+
 	writeJSON(w, http.StatusCreated, revisionToResponse(rev))
 }
 
 // HandleDownloadFile downloads the file for a specific revision.
+// For .kc files, silo/ entries are repacked with current DB state.
 func (s *Server) HandleDownloadFile(w http.ResponseWriter, r *http.Request) {
 	ctx := r.Context()
 	partNumber := chi.URLParam(r, "partNumber")
@@ -1649,18 +1725,23 @@ func (s *Server) HandleDownloadFile(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// Get file from storage
-	var reader interface {
-		Read(p []byte) (n int, err error)
-		Close() error
+	// ETag: computed from revision + metadata freshness.
+	meta, _ := s.metadata.Get(ctx, item.ID) // nil is ok (plain .fcstd)
+	etag := computeETag(revision, meta)
+
+	if match := r.Header.Get("If-None-Match"); match == etag {
+		w.Header().Set("ETag", etag)
+		w.WriteHeader(http.StatusNotModified)
+		return
 	}
 
+	// Get file from storage
+	var reader io.ReadCloser
 	if revision.FileVersion != nil && *revision.FileVersion != "" {
 		reader, err = s.storage.GetVersion(ctx, *revision.FileKey, *revision.FileVersion)
 	} else {
 		reader, err = s.storage.Get(ctx, *revision.FileKey)
 	}
-
 	if err != nil {
 		s.logger.Error().Err(err).Str("key", *revision.FileKey).Msg("failed to get file")
 		writeError(w, http.StatusInternalServerError, "download_failed", err.Error())
@@ -1668,28 +1749,37 @@ func (s *Server) HandleDownloadFile(w http.ResponseWriter, r *http.Request) {
 	}
 	defer reader.Close()
 
+	// Read entire file for potential .kc repacking.
+	data, err := io.ReadAll(reader)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to read file")
+		writeError(w, http.StatusInternalServerError, "download_failed", "Failed to read file")
+		return
+	}
+
+	// Repack silo/ entries for .kc files with indexed metadata.
+	output := data
+	if meta != nil {
+		if hasSilo, chkErr := kc.HasSiloDir(data); chkErr == nil && hasSilo {
+			if !canSkipRepack(revision, meta) {
+				if packed, packErr := s.packKCFile(ctx, data, item, revision, meta); packErr != nil {
+					s.logger.Warn().Err(packErr).Str("part_number", partNumber).Msg("kc: packing failed, serving original")
+				} else {
+					output = packed
+				}
+			}
+		}
+	}
+
 	// Set response headers
 	filename := partNumber + "_rev" + strconv.Itoa(revNum) + ".FCStd"
 	w.Header().Set("Content-Type", "application/octet-stream")
 	w.Header().Set("Content-Disposition", "attachment; filename=\""+filename+"\"")
-	if revision.FileSize != nil {
-		w.Header().Set("Content-Length", strconv.FormatInt(*revision.FileSize, 10))
-	}
+	w.Header().Set("Content-Length", strconv.Itoa(len(output)))
+	w.Header().Set("ETag", etag)
+	w.Header().Set("Cache-Control", "private, must-revalidate")
 
-	// Stream file to response
-	buf := make([]byte, 32*1024)
-	for {
-		n, readErr := reader.Read(buf)
-		if n > 0 {
-			if _, writeErr := w.Write(buf[:n]); writeErr != nil {
-				s.logger.Error().Err(writeErr).Msg("failed to write response")
-				return
-			}
-		}
-		if readErr != nil {
-			break
-		}
-	}
+	w.Write(output)
 }
 
 // HandleDownloadLatestFile downloads the file for the latest revision.

internal/api/job_handlers.go

@@ -326,6 +326,10 @@ func (s *Server) HandleDeleteRunner(w http.ResponseWriter, r *http.Request) {
 // triggerJobs creates jobs for all enabled definitions matching the trigger type.
 // It applies trigger filters (e.g. item_type) before creating each job.
 func (s *Server) triggerJobs(ctx context.Context, triggerType string, itemID string, item *db.Item) {
+	if !s.modules.IsEnabled("jobs") {
+		return
+	}
+
 	defs, err := s.jobs.GetDefinitionsByTrigger(ctx, triggerType)
 	if err != nil {
 		s.logger.Error().Err(err).Str("trigger", triggerType).Msg("failed to get job definitions for trigger")

internal/api/job_handlers_test.go

@@ -7,9 +7,11 @@ import (
 	"net/http/httptest"
 	"strings"
 	"testing"
+	"time"
 
 	"github.com/go-chi/chi/v5"
 	"github.com/kindredsystems/silo/internal/db"
+	"github.com/kindredsystems/silo/internal/modules"
 	"github.com/kindredsystems/silo/internal/schema"
 	"github.com/kindredsystems/silo/internal/testutil"
 	"github.com/rs/zerolog"
@@ -29,6 +31,7 @@ func newJobTestServer(t *testing.T) *Server {
 		nil, nil, nil, nil, nil,
 		broker, state,
 		nil, "",
+		modules.NewRegistry(), nil,
 	)
 }
 
@@ -317,6 +320,260 @@ func TestHandleDeleteRunner(t *testing.T) {
 	}
 }
 
+// --- Trigger integration tests ---
+
+// newTriggerRouter builds a router with items, revisions, BOM, and jobs routes
+// so that HTTP-based actions can fire triggerJobs via goroutine.
+func newTriggerRouter(s *Server) http.Handler {
+	r := chi.NewRouter()
+	r.Route("/api/items", func(r chi.Router) {
+		r.Post("/", s.HandleCreateItem)
+		r.Route("/{partNumber}", func(r chi.Router) {
+			r.Post("/revisions", s.HandleCreateRevision)
+			r.Post("/bom", s.HandleAddBOMEntry)
+			r.Put("/bom/{childPartNumber}", s.HandleUpdateBOMEntry)
+			r.Delete("/bom/{childPartNumber}", s.HandleDeleteBOMEntry)
+		})
+	})
+	r.Route("/api/jobs", func(r chi.Router) {
+		r.Get("/", s.HandleListJobs)
+	})
+	return r
+}
+
+func waitForJobs(t *testing.T, s *Server, itemID string, wantCount int) []*db.Job {
+	t.Helper()
+	// triggerJobs runs in a goroutine; poll up to 2 seconds.
+	for i := 0; i < 20; i++ {
+		jobs, err := s.jobs.ListJobs(context.Background(), "", itemID, 50, 0)
+		if err != nil {
+			t.Fatalf("listing jobs: %v", err)
+		}
+		if len(jobs) >= wantCount {
+			return jobs
+		}
+		time.Sleep(100 * time.Millisecond)
+	}
+	jobs, _ := s.jobs.ListJobs(context.Background(), "", itemID, 50, 0)
+	return jobs
+}
+
+func TestTriggerJobsOnRevisionCreate(t *testing.T) {
+	s := newJobTestServer(t)
+	if err := s.modules.SetEnabled("jobs", true); err != nil {
+		t.Fatalf("enabling jobs module: %v", err)
+	}
+	router := newTriggerRouter(s)
+
+	// Create an item.
+	createItemDirect(t, s, "TRIG-REV-001", "trigger test item", nil)
+
+	// Seed a job definition that triggers on revision_created.
+	def := &db.JobDefinitionRecord{
+		Name:           "rev-trigger-test",
+		Version:        1,
+		TriggerType:    "revision_created",
+		ScopeType:      "item",
+		ComputeType:    "validate",
+		RunnerTags:     []string{"test"},
+		TimeoutSeconds: 60,
+		MaxRetries:     0,
+		Priority:       100,
+		Enabled:        true,
+	}
+	if err := s.jobs.UpsertDefinition(context.Background(), def); err != nil {
+		t.Fatalf("seeding definition: %v", err)
+	}
+
+	// Create a revision via HTTP (fires triggerJobs in goroutine).
+	body := `{"properties":{"material":"steel"},"comment":"trigger test"}`
+	req := authRequest(httptest.NewRequest("POST", "/api/items/TRIG-REV-001/revisions", strings.NewReader(body)))
+	req.Header.Set("Content-Type", "application/json")
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusCreated {
+		t.Fatalf("create revision: expected 201, got %d: %s", w.Code, w.Body.String())
+	}
+
+	// Get the item ID to filter jobs.
+	item, _ := s.items.GetByPartNumber(context.Background(), "TRIG-REV-001")
+	if item == nil {
+		t.Fatal("item not found after creation")
+	}
+
+	jobs := waitForJobs(t, s, item.ID, 1)
+	if len(jobs) == 0 {
+		t.Fatal("expected at least 1 triggered job, got 0")
+	}
+	if jobs[0].DefinitionName != "rev-trigger-test" {
+		t.Errorf("expected definition name rev-trigger-test, got %s", jobs[0].DefinitionName)
+	}
+}
+
+func TestTriggerJobsOnBOMChange(t *testing.T) {
+	s := newJobTestServer(t)
+	if err := s.modules.SetEnabled("jobs", true); err != nil {
+		t.Fatalf("enabling jobs module: %v", err)
+	}
+	router := newTriggerRouter(s)
+
+	// Create parent and child items.
+	createItemDirect(t, s, "TRIG-BOM-P", "parent", nil)
+	createItemDirect(t, s, "TRIG-BOM-C", "child", nil)
+
+	// Seed a bom_changed job definition.
+	def := &db.JobDefinitionRecord{
+		Name:           "bom-trigger-test",
+		Version:        1,
+		TriggerType:    "bom_changed",
+		ScopeType:      "item",
+		ComputeType:    "validate",
+		RunnerTags:     []string{"test"},
+		TimeoutSeconds: 60,
+		MaxRetries:     0,
+		Priority:       100,
+		Enabled:        true,
+	}
+	if err := s.jobs.UpsertDefinition(context.Background(), def); err != nil {
+		t.Fatalf("seeding definition: %v", err)
+	}
+
+	// Add a BOM entry via HTTP.
+	body := `{"child_part_number":"TRIG-BOM-C","rel_type":"component","quantity":2}`
+	req := authRequest(httptest.NewRequest("POST", "/api/items/TRIG-BOM-P/bom", strings.NewReader(body)))
+	req.Header.Set("Content-Type", "application/json")
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusCreated {
+		t.Fatalf("add BOM entry: expected 201, got %d: %s", w.Code, w.Body.String())
+	}
+
+	// Get the parent item ID.
+	parent, _ := s.items.GetByPartNumber(context.Background(), "TRIG-BOM-P")
+	if parent == nil {
+		t.Fatal("parent item not found")
+	}
+
+	jobs := waitForJobs(t, s, parent.ID, 1)
+	if len(jobs) == 0 {
+		t.Fatal("expected at least 1 triggered job, got 0")
+	}
+	if jobs[0].DefinitionName != "bom-trigger-test" {
+		t.Errorf("expected definition name bom-trigger-test, got %s", jobs[0].DefinitionName)
+	}
+}
+
+func TestTriggerJobsFilterMismatch(t *testing.T) {
+	s := newJobTestServer(t)
+	if err := s.modules.SetEnabled("jobs", true); err != nil {
+		t.Fatalf("enabling jobs module: %v", err)
+	}
+	router := newTriggerRouter(s)
+
+	// Create a "part" type item (not "assembly").
+	createItemDirect(t, s, "TRIG-FILT-P", "filter parent", nil)
+	createItemDirect(t, s, "TRIG-FILT-C", "filter child", nil)
+
+	// Seed a definition that only triggers for assembly items.
+	def := &db.JobDefinitionRecord{
+		Name:           "assembly-only-test",
+		Version:        1,
+		TriggerType:    "bom_changed",
+		ScopeType:      "item",
+		ComputeType:    "validate",
+		RunnerTags:     []string{"test"},
+		TimeoutSeconds: 60,
+		MaxRetries:     0,
+		Priority:       100,
+		Enabled:        true,
+		Definition: map[string]any{
+			"trigger": map[string]any{
+				"filter": map[string]any{
+					"item_type": "assembly",
+				},
+			},
+		},
+	}
+	if err := s.jobs.UpsertDefinition(context.Background(), def); err != nil {
+		t.Fatalf("seeding definition: %v", err)
+	}
+
+	// Add a BOM entry on a "part" item (should NOT match assembly filter).
+	body := `{"child_part_number":"TRIG-FILT-C","rel_type":"component","quantity":1}`
+	req := authRequest(httptest.NewRequest("POST", "/api/items/TRIG-FILT-P/bom", strings.NewReader(body)))
+	req.Header.Set("Content-Type", "application/json")
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusCreated {
+		t.Fatalf("add BOM entry: expected 201, got %d: %s", w.Code, w.Body.String())
+	}
+
+	// Wait briefly, then verify no jobs were created.
+	parent, _ := s.items.GetByPartNumber(context.Background(), "TRIG-FILT-P")
+	time.Sleep(500 * time.Millisecond)
+
+	jobs, err := s.jobs.ListJobs(context.Background(), "", parent.ID, 50, 0)
+	if err != nil {
+		t.Fatalf("listing jobs: %v", err)
+	}
+	if len(jobs) != 0 {
+		t.Errorf("expected 0 jobs (filter mismatch), got %d", len(jobs))
+	}
+}
+
+func TestTriggerJobsModuleDisabled(t *testing.T) {
+	s := newJobTestServer(t)
+	// Jobs module is disabled by default in NewRegistry().
+	router := newTriggerRouter(s)
+
+	// Create items.
+	createItemDirect(t, s, "TRIG-DIS-P", "disabled parent", nil)
+	createItemDirect(t, s, "TRIG-DIS-C", "disabled child", nil)
+
+	// Seed a bom_changed definition (it exists in DB but module is off).
+	def := &db.JobDefinitionRecord{
+		Name:           "disabled-trigger-test",
+		Version:        1,
+		TriggerType:    "bom_changed",
+		ScopeType:      "item",
+		ComputeType:    "validate",
+		RunnerTags:     []string{"test"},
+		TimeoutSeconds: 60,
+		MaxRetries:     0,
+		Priority:       100,
+		Enabled:        true,
+	}
+	if err := s.jobs.UpsertDefinition(context.Background(), def); err != nil {
+		t.Fatalf("seeding definition: %v", err)
+	}
+
+	// Add a BOM entry with jobs module disabled.
+	body := `{"child_part_number":"TRIG-DIS-C","rel_type":"component","quantity":1}`
+	req := authRequest(httptest.NewRequest("POST", "/api/items/TRIG-DIS-P/bom", strings.NewReader(body)))
+	req.Header.Set("Content-Type", "application/json")
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusCreated {
+		t.Fatalf("add BOM entry: expected 201, got %d: %s", w.Code, w.Body.String())
+	}
+
+	// Wait briefly, then verify no jobs were created.
+	parent, _ := s.items.GetByPartNumber(context.Background(), "TRIG-DIS-P")
+	time.Sleep(500 * time.Millisecond)
+
+	jobs, err := s.jobs.ListJobs(context.Background(), "", parent.ID, 50, 0)
+	if err != nil {
+		t.Fatalf("listing jobs: %v", err)
+	}
+	if len(jobs) != 0 {
+		t.Errorf("expected 0 jobs (module disabled), got %d", len(jobs))
+	}
+}
+
 func TestGenerateRunnerToken(t *testing.T) {
 	raw, hash, prefix := generateRunnerToken()
 

internal/api/location_handlers.go

@@ -0,0 +1,234 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+	"strings"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/kindredsystems/silo/internal/db"
+)
+
+// LocationResponse is the API representation of a location.
+type LocationResponse struct {
+	ID           string         `json:"id"`
+	Path         string         `json:"path"`
+	Name         string         `json:"name"`
+	ParentID     *string        `json:"parent_id,omitempty"`
+	LocationType string         `json:"location_type"`
+	Depth        int            `json:"depth"`
+	Metadata     map[string]any `json:"metadata,omitempty"`
+	CreatedAt    string         `json:"created_at"`
+}
+
+// CreateLocationRequest represents a request to create a location.
+type CreateLocationRequest struct {
+	Path         string         `json:"path"`
+	Name         string         `json:"name"`
+	LocationType string         `json:"location_type"`
+	Metadata     map[string]any `json:"metadata,omitempty"`
+}
+
+// UpdateLocationRequest represents a request to update a location.
+type UpdateLocationRequest struct {
+	Name         string         `json:"name"`
+	LocationType string         `json:"location_type"`
+	Metadata     map[string]any `json:"metadata,omitempty"`
+}
+
+func locationToResponse(loc *db.Location) LocationResponse {
+	return LocationResponse{
+		ID:           loc.ID,
+		Path:         loc.Path,
+		Name:         loc.Name,
+		ParentID:     loc.ParentID,
+		LocationType: loc.LocationType,
+		Depth:        loc.Depth,
+		Metadata:     loc.Metadata,
+		CreatedAt:    loc.CreatedAt.Format("2006-01-02T15:04:05Z07:00"),
+	}
+}
+
+// HandleListLocations lists all locations. If ?tree={path} is set, returns that
+// subtree. If ?root=true, returns only root-level locations (depth 0).
+func (s *Server) HandleListLocations(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+
+	treePath := r.URL.Query().Get("tree")
+	if treePath != "" {
+		locs, err := s.locations.GetTree(ctx, treePath)
+		if err != nil {
+			s.logger.Error().Err(err).Str("tree", treePath).Msg("failed to get location tree")
+			writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get location tree")
+			return
+		}
+		writeJSON(w, http.StatusOK, locationsToResponse(locs))
+		return
+	}
+
+	locs, err := s.locations.List(ctx)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to list locations")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to list locations")
+		return
+	}
+
+	writeJSON(w, http.StatusOK, locationsToResponse(locs))
+}
+
+// HandleCreateLocation creates a new location.
+func (s *Server) HandleCreateLocation(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+
+	var req CreateLocationRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid_json", err.Error())
+		return
+	}
+
+	if req.Path == "" {
+		writeError(w, http.StatusBadRequest, "invalid_request", "Path is required")
+		return
+	}
+	if req.Name == "" {
+		writeError(w, http.StatusBadRequest, "invalid_request", "Name is required")
+		return
+	}
+	if req.LocationType == "" {
+		writeError(w, http.StatusBadRequest, "invalid_request", "Location type is required")
+		return
+	}
+
+	// Normalize: trim slashes
+	req.Path = strings.Trim(req.Path, "/")
+
+	loc := &db.Location{
+		Path:         req.Path,
+		Name:         req.Name,
+		LocationType: req.LocationType,
+		Metadata:     req.Metadata,
+	}
+	if loc.Metadata == nil {
+		loc.Metadata = map[string]any{}
+	}
+
+	if err := s.locations.Create(ctx, loc); err != nil {
+		if strings.Contains(err.Error(), "parent location") || strings.Contains(err.Error(), "does not exist") {
+			writeError(w, http.StatusBadRequest, "invalid_parent", err.Error())
+			return
+		}
+		if strings.Contains(err.Error(), "duplicate key") || strings.Contains(err.Error(), "unique") {
+			writeError(w, http.StatusConflict, "already_exists", "Location path already exists")
+			return
+		}
+		s.logger.Error().Err(err).Str("path", req.Path).Msg("failed to create location")
+		writeError(w, http.StatusInternalServerError, "create_failed", err.Error())
+		return
+	}
+
+	writeJSON(w, http.StatusCreated, locationToResponse(loc))
+}
+
+// HandleGetLocation retrieves a location by path. The path is the rest of the
+// URL after /api/locations/, which chi captures as a wildcard.
+func (s *Server) HandleGetLocation(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	path := strings.Trim(chi.URLParam(r, "*"), "/")
+
+	if path == "" {
+		writeError(w, http.StatusBadRequest, "invalid_request", "Location path is required")
+		return
+	}
+
+	loc, err := s.locations.GetByPath(ctx, path)
+	if err != nil {
+		s.logger.Error().Err(err).Str("path", path).Msg("failed to get location")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get location")
+		return
+	}
+	if loc == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Location not found")
+		return
+	}
+
+	writeJSON(w, http.StatusOK, locationToResponse(loc))
+}
+
+// HandleUpdateLocation updates a location by path.
+func (s *Server) HandleUpdateLocation(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	path := strings.Trim(chi.URLParam(r, "*"), "/")
+
+	if path == "" {
+		writeError(w, http.StatusBadRequest, "invalid_request", "Location path is required")
+		return
+	}
+
+	var req UpdateLocationRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid_json", err.Error())
+		return
+	}
+
+	if req.Name == "" {
+		writeError(w, http.StatusBadRequest, "invalid_request", "Name is required")
+		return
+	}
+	if req.LocationType == "" {
+		writeError(w, http.StatusBadRequest, "invalid_request", "Location type is required")
+		return
+	}
+
+	meta := req.Metadata
+	if meta == nil {
+		meta = map[string]any{}
+	}
+
+	if err := s.locations.Update(ctx, path, req.Name, req.LocationType, meta); err != nil {
+		if strings.Contains(err.Error(), "not found") {
+			writeError(w, http.StatusNotFound, "not_found", "Location not found")
+			return
+		}
+		s.logger.Error().Err(err).Str("path", path).Msg("failed to update location")
+		writeError(w, http.StatusInternalServerError, "update_failed", err.Error())
+		return
+	}
+
+	loc, _ := s.locations.GetByPath(ctx, path)
+	writeJSON(w, http.StatusOK, locationToResponse(loc))
+}
+
+// HandleDeleteLocation deletes a location by path. Rejects if inventory exists.
+func (s *Server) HandleDeleteLocation(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	path := strings.Trim(chi.URLParam(r, "*"), "/")
+
+	if path == "" {
+		writeError(w, http.StatusBadRequest, "invalid_request", "Location path is required")
+		return
+	}
+
+	if err := s.locations.Delete(ctx, path); err != nil {
+		if strings.Contains(err.Error(), "inventory record") {
+			writeError(w, http.StatusConflict, "has_inventory", err.Error())
+			return
+		}
+		if strings.Contains(err.Error(), "not found") {
+			writeError(w, http.StatusNotFound, "not_found", "Location not found")
+			return
+		}
+		s.logger.Error().Err(err).Str("path", path).Msg("failed to delete location")
+		writeError(w, http.StatusInternalServerError, "delete_failed", err.Error())
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}
+
+func locationsToResponse(locs []*db.Location) []LocationResponse {
+	result := make([]LocationResponse, len(locs))
+	for i, l := range locs {
+		result[i] = locationToResponse(l)
+	}
+	return result
+}

internal/api/location_handlers_test.go

@@ -0,0 +1,323 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/go-chi/chi/v5"
+)
+
+func newLocationRouter(s *Server) http.Handler {
+	r := chi.NewRouter()
+	r.Get("/api/locations", s.HandleListLocations)
+	r.Post("/api/locations", s.HandleCreateLocation)
+	r.Get("/api/locations/*", s.HandleGetLocation)
+	r.Put("/api/locations/*", s.HandleUpdateLocation)
+	r.Delete("/api/locations/*", s.HandleDeleteLocation)
+	return r
+}
+
+func TestHandleListLocationsEmpty(t *testing.T) {
+	s := newTestServer(t)
+	router := newLocationRouter(s)
+
+	req := httptest.NewRequest("GET", "/api/locations", nil)
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("status: got %d, want %d; body: %s", w.Code, http.StatusOK, w.Body.String())
+	}
+
+	var locs []LocationResponse
+	if err := json.Unmarshal(w.Body.Bytes(), &locs); err != nil {
+		t.Fatalf("decoding response: %v", err)
+	}
+	if len(locs) != 0 {
+		t.Fatalf("expected 0 locations, got %d", len(locs))
+	}
+}
+
+func TestHandleCreateAndGetLocation(t *testing.T) {
+	s := newTestServer(t)
+	router := newLocationRouter(s)
+
+	// Create root location
+	body := `{"path": "lab", "name": "Lab", "location_type": "building"}`
+	req := httptest.NewRequest("POST", "/api/locations", strings.NewReader(body))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusCreated {
+		t.Fatalf("create status: got %d, want %d; body: %s", w.Code, http.StatusCreated, w.Body.String())
+	}
+
+	var created LocationResponse
+	if err := json.Unmarshal(w.Body.Bytes(), &created); err != nil {
+		t.Fatalf("decoding create response: %v", err)
+	}
+	if created.Path != "lab" {
+		t.Errorf("path: got %q, want %q", created.Path, "lab")
+	}
+	if created.Name != "Lab" {
+		t.Errorf("name: got %q, want %q", created.Name, "Lab")
+	}
+	if created.Depth != 0 {
+		t.Errorf("depth: got %d, want 0", created.Depth)
+	}
+	if created.ID == "" {
+		t.Error("expected ID to be set")
+	}
+
+	// Get by path
+	req = httptest.NewRequest("GET", "/api/locations/lab", nil)
+	w = httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("get status: got %d, want %d; body: %s", w.Code, http.StatusOK, w.Body.String())
+	}
+
+	var got LocationResponse
+	if err := json.Unmarshal(w.Body.Bytes(), &got); err != nil {
+		t.Fatalf("decoding get response: %v", err)
+	}
+	if got.ID != created.ID {
+		t.Errorf("ID mismatch: got %q, want %q", got.ID, created.ID)
+	}
+}
+
+func TestHandleCreateNestedLocation(t *testing.T) {
+	s := newTestServer(t)
+	router := newLocationRouter(s)
+
+	// Create root
+	body := `{"path": "warehouse", "name": "Warehouse", "location_type": "building"}`
+	req := httptest.NewRequest("POST", "/api/locations", strings.NewReader(body))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	if w.Code != http.StatusCreated {
+		t.Fatalf("create root: got %d; body: %s", w.Code, w.Body.String())
+	}
+
+	// Create child
+	body = `{"path": "warehouse/shelf-a", "name": "Shelf A", "location_type": "shelf"}`
+	req = httptest.NewRequest("POST", "/api/locations", strings.NewReader(body))
+	w = httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	if w.Code != http.StatusCreated {
+		t.Fatalf("create child: got %d; body: %s", w.Code, w.Body.String())
+	}
+
+	var child LocationResponse
+	json.Unmarshal(w.Body.Bytes(), &child)
+	if child.Depth != 1 {
+		t.Errorf("child depth: got %d, want 1", child.Depth)
+	}
+	if child.ParentID == nil {
+		t.Error("expected parent_id to be set")
+	}
+
+	// Create grandchild
+	body = `{"path": "warehouse/shelf-a/bin-3", "name": "Bin 3", "location_type": "bin"}`
+	req = httptest.NewRequest("POST", "/api/locations", strings.NewReader(body))
+	w = httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	if w.Code != http.StatusCreated {
+		t.Fatalf("create grandchild: got %d; body: %s", w.Code, w.Body.String())
+	}
+
+	var gc LocationResponse
+	json.Unmarshal(w.Body.Bytes(), &gc)
+	if gc.Depth != 2 {
+		t.Errorf("grandchild depth: got %d, want 2", gc.Depth)
+	}
+
+	// Get nested path
+	req = httptest.NewRequest("GET", "/api/locations/warehouse/shelf-a/bin-3", nil)
+	w = httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	if w.Code != http.StatusOK {
+		t.Fatalf("get nested: got %d; body: %s", w.Code, w.Body.String())
+	}
+}
+
+func TestHandleCreateLocationMissingParent(t *testing.T) {
+	s := newTestServer(t)
+	router := newLocationRouter(s)
+
+	body := `{"path": "nonexistent/child", "name": "Child", "location_type": "shelf"}`
+	req := httptest.NewRequest("POST", "/api/locations", strings.NewReader(body))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Fatalf("expected 400, got %d; body: %s", w.Code, w.Body.String())
+	}
+}
+
+func TestHandleUpdateLocation(t *testing.T) {
+	s := newTestServer(t)
+	router := newLocationRouter(s)
+
+	// Create
+	body := `{"path": "office", "name": "Office", "location_type": "room"}`
+	req := httptest.NewRequest("POST", "/api/locations", strings.NewReader(body))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	if w.Code != http.StatusCreated {
+		t.Fatalf("create: got %d; body: %s", w.Code, w.Body.String())
+	}
+
+	// Update
+	body = `{"name": "Main Office", "location_type": "building", "metadata": {"floor": 2}}`
+	req = httptest.NewRequest("PUT", "/api/locations/office", strings.NewReader(body))
+	w = httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	if w.Code != http.StatusOK {
+		t.Fatalf("update: got %d; body: %s", w.Code, w.Body.String())
+	}
+
+	var updated LocationResponse
+	json.Unmarshal(w.Body.Bytes(), &updated)
+	if updated.Name != "Main Office" {
+		t.Errorf("name: got %q, want %q", updated.Name, "Main Office")
+	}
+	if updated.LocationType != "building" {
+		t.Errorf("type: got %q, want %q", updated.LocationType, "building")
+	}
+}
+
+func TestHandleDeleteLocation(t *testing.T) {
+	s := newTestServer(t)
+	router := newLocationRouter(s)
+
+	// Create
+	body := `{"path": "temp", "name": "Temp", "location_type": "area"}`
+	req := httptest.NewRequest("POST", "/api/locations", strings.NewReader(body))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	if w.Code != http.StatusCreated {
+		t.Fatalf("create: got %d; body: %s", w.Code, w.Body.String())
+	}
+
+	// Delete
+	req = httptest.NewRequest("DELETE", "/api/locations/temp", nil)
+	w = httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	if w.Code != http.StatusNoContent {
+		t.Fatalf("delete: got %d, want %d; body: %s", w.Code, http.StatusNoContent, w.Body.String())
+	}
+
+	// Verify gone
+	req = httptest.NewRequest("GET", "/api/locations/temp", nil)
+	w = httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	if w.Code != http.StatusNotFound {
+		t.Fatalf("get after delete: got %d, want %d", w.Code, http.StatusNotFound)
+	}
+}
+
+func TestHandleDeleteLocationNotFound(t *testing.T) {
+	s := newTestServer(t)
+	router := newLocationRouter(s)
+
+	req := httptest.NewRequest("DELETE", "/api/locations/doesnotexist", nil)
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	if w.Code != http.StatusNotFound {
+		t.Fatalf("delete missing: got %d, want %d; body: %s", w.Code, http.StatusNotFound, w.Body.String())
+	}
+}
+
+func TestHandleListLocationsTree(t *testing.T) {
+	s := newTestServer(t)
+	router := newLocationRouter(s)
+
+	// Create hierarchy
+	for _, loc := range []string{
+		`{"path": "site", "name": "Site", "location_type": "site"}`,
+		`{"path": "site/bldg", "name": "Building", "location_type": "building"}`,
+		`{"path": "site/bldg/room1", "name": "Room 1", "location_type": "room"}`,
+		`{"path": "other", "name": "Other", "location_type": "site"}`,
+	} {
+		req := httptest.NewRequest("POST", "/api/locations", strings.NewReader(loc))
+		w := httptest.NewRecorder()
+		router.ServeHTTP(w, req)
+		if w.Code != http.StatusCreated {
+			t.Fatalf("create: got %d; body: %s", w.Code, w.Body.String())
+		}
+	}
+
+	// List tree under "site"
+	req := httptest.NewRequest("GET", "/api/locations?tree=site", nil)
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	if w.Code != http.StatusOK {
+		t.Fatalf("tree: got %d; body: %s", w.Code, w.Body.String())
+	}
+
+	var locs []LocationResponse
+	json.Unmarshal(w.Body.Bytes(), &locs)
+	if len(locs) != 3 {
+		t.Fatalf("tree count: got %d, want 3 (site + bldg + room1)", len(locs))
+	}
+
+	// Full list should have 4
+	req = httptest.NewRequest("GET", "/api/locations", nil)
+	w = httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	json.Unmarshal(w.Body.Bytes(), &locs)
+	if len(locs) != 4 {
+		t.Fatalf("full list: got %d, want 4", len(locs))
+	}
+}
+
+func TestHandleCreateLocationDuplicate(t *testing.T) {
+	s := newTestServer(t)
+	router := newLocationRouter(s)
+
+	body := `{"path": "dup", "name": "Dup", "location_type": "area"}`
+	req := httptest.NewRequest("POST", "/api/locations", strings.NewReader(body))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	if w.Code != http.StatusCreated {
+		t.Fatalf("first create: got %d; body: %s", w.Code, w.Body.String())
+	}
+
+	// Duplicate
+	req = httptest.NewRequest("POST", "/api/locations", strings.NewReader(body))
+	w = httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+	if w.Code != http.StatusConflict {
+		t.Fatalf("duplicate: got %d, want %d; body: %s", w.Code, http.StatusConflict, w.Body.String())
+	}
+}
+
+func TestHandleCreateLocationValidation(t *testing.T) {
+	s := newTestServer(t)
+	router := newLocationRouter(s)
+
+	tests := []struct {
+		name string
+		body string
+	}{
+		{"missing path", `{"name": "X", "location_type": "area"}`},
+		{"missing name", `{"path": "x", "location_type": "area"}`},
+		{"missing type", `{"path": "x", "name": "X"}`},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			req := httptest.NewRequest("POST", "/api/locations", strings.NewReader(tc.body))
+			w := httptest.NewRecorder()
+			router.ServeHTTP(w, req)
+			if w.Code != http.StatusBadRequest {
+				t.Fatalf("got %d, want 400; body: %s", w.Code, w.Body.String())
+			}
+		})
+	}
+}

internal/api/macro_handlers.go

@@ -0,0 +1,95 @@
+package api
+
+import (
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+)
+
+// MacroListItem is the JSON representation for GET /macros list entries.
+type MacroListItem struct {
+	Filename       string `json:"filename"`
+	Trigger        string `json:"trigger"`
+	RevisionNumber int    `json:"revision_number"`
+}
+
+// MacroResponse is the JSON representation for GET /macros/{filename}.
+type MacroResponse struct {
+	Filename       string `json:"filename"`
+	Trigger        string `json:"trigger"`
+	Content        string `json:"content"`
+	RevisionNumber int    `json:"revision_number"`
+}
+
+// HandleGetMacros returns the list of registered macros for an item.
+// GET /api/items/{partNumber}/macros
+func (s *Server) HandleGetMacros(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	partNumber := chi.URLParam(r, "partNumber")
+
+	item, err := s.items.GetByPartNumber(ctx, partNumber)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get item")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get item")
+		return
+	}
+	if item == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Item not found")
+		return
+	}
+
+	macros, err := s.macros.ListByItem(ctx, item.ID)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to list macros")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to list macros")
+		return
+	}
+
+	resp := make([]MacroListItem, len(macros))
+	for i, m := range macros {
+		resp[i] = MacroListItem{
+			Filename:       m.Filename,
+			Trigger:        m.Trigger,
+			RevisionNumber: m.RevisionNumber,
+		}
+	}
+
+	writeJSON(w, http.StatusOK, resp)
+}
+
+// HandleGetMacro returns a single macro's source content.
+// GET /api/items/{partNumber}/macros/{filename}
+func (s *Server) HandleGetMacro(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	partNumber := chi.URLParam(r, "partNumber")
+	filename := chi.URLParam(r, "filename")
+
+	item, err := s.items.GetByPartNumber(ctx, partNumber)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get item")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get item")
+		return
+	}
+	if item == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Item not found")
+		return
+	}
+
+	macro, err := s.macros.GetByFilename(ctx, item.ID, filename)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get macro")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get macro")
+		return
+	}
+	if macro == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Macro not found")
+		return
+	}
+
+	writeJSON(w, http.StatusOK, MacroResponse{
+		Filename:       macro.Filename,
+		Trigger:        macro.Trigger,
+		Content:        macro.Content,
+		RevisionNumber: macro.RevisionNumber,
+	})
+}

internal/api/metadata_handlers.go

@@ -0,0 +1,472 @@
+package api
+
+import (
+	"context"
+	"encoding/json"
+	"io"
+	"net/http"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/kindredsystems/silo/internal/auth"
+	"github.com/kindredsystems/silo/internal/db"
+	"github.com/kindredsystems/silo/internal/kc"
+)
+
+// validTransitions defines allowed lifecycle state transitions for Phase 1.
+var validTransitions = map[string][]string{
+	"draft":    {"review"},
+	"review":   {"draft", "released"},
+	"released": {"obsolete"},
+	"obsolete": {},
+}
+
+// MetadataResponse is the JSON representation returned by GET /metadata.
+type MetadataResponse struct {
+	SchemaName     *string        `json:"schema_name"`
+	LifecycleState string         `json:"lifecycle_state"`
+	Tags           []string       `json:"tags"`
+	Fields         map[string]any `json:"fields"`
+	Manifest       *ManifestInfo  `json:"manifest,omitempty"`
+	UpdatedAt      string         `json:"updated_at"`
+	UpdatedBy      *string        `json:"updated_by,omitempty"`
+}
+
+// ManifestInfo is the manifest subset included in MetadataResponse.
+type ManifestInfo struct {
+	UUID         *string `json:"uuid,omitempty"`
+	SiloInstance *string `json:"silo_instance,omitempty"`
+	RevisionHash *string `json:"revision_hash,omitempty"`
+	KCVersion    *string `json:"kc_version,omitempty"`
+}
+
+func metadataToResponse(m *db.ItemMetadata) MetadataResponse {
+	resp := MetadataResponse{
+		SchemaName:     m.SchemaName,
+		LifecycleState: m.LifecycleState,
+		Tags:           m.Tags,
+		Fields:         m.Fields,
+		UpdatedAt:      m.UpdatedAt.UTC().Format("2006-01-02T15:04:05Z"),
+		UpdatedBy:      m.UpdatedBy,
+	}
+	if m.ManifestUUID != nil || m.SiloInstance != nil || m.RevisionHash != nil || m.KCVersion != nil {
+		resp.Manifest = &ManifestInfo{
+			UUID:         m.ManifestUUID,
+			SiloInstance: m.SiloInstance,
+			RevisionHash: m.RevisionHash,
+			KCVersion:    m.KCVersion,
+		}
+	}
+	return resp
+}
+
+// HandleGetMetadata returns indexed metadata for an item.
+// GET /api/items/{partNumber}/metadata
+func (s *Server) HandleGetMetadata(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	partNumber := chi.URLParam(r, "partNumber")
+
+	item, err := s.items.GetByPartNumber(ctx, partNumber)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get item")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get item")
+		return
+	}
+	if item == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Item not found")
+		return
+	}
+
+	meta, err := s.metadata.Get(ctx, item.ID)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get metadata")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get metadata")
+		return
+	}
+	if meta == nil {
+		writeError(w, http.StatusNotFound, "not_found", "No metadata indexed for this item")
+		return
+	}
+
+	writeJSON(w, http.StatusOK, metadataToResponse(meta))
+}
+
+// HandleUpdateMetadata merges fields into the metadata JSONB.
+// PUT /api/items/{partNumber}/metadata
+func (s *Server) HandleUpdateMetadata(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	partNumber := chi.URLParam(r, "partNumber")
+
+	item, err := s.items.GetByPartNumber(ctx, partNumber)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get item")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get item")
+		return
+	}
+	if item == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Item not found")
+		return
+	}
+
+	var req struct {
+		Fields map[string]any `json:"fields"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid_body", "Invalid JSON body")
+		return
+	}
+	if len(req.Fields) == 0 {
+		writeError(w, http.StatusBadRequest, "invalid_body", "Fields must not be empty")
+		return
+	}
+
+	username := ""
+	if user := auth.UserFromContext(ctx); user != nil {
+		username = user.Username
+	}
+
+	if err := s.metadata.UpdateFields(ctx, item.ID, req.Fields, username); err != nil {
+		s.logger.Error().Err(err).Msg("failed to update metadata fields")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to update metadata")
+		return
+	}
+
+	meta, err := s.metadata.Get(ctx, item.ID)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to read back metadata")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to read metadata")
+		return
+	}
+
+	s.broker.Publish("metadata.updated", mustMarshal(map[string]any{
+		"part_number":     partNumber,
+		"changed_fields":  fieldKeys(req.Fields),
+		"lifecycle_state": meta.LifecycleState,
+		"updated_by":      username,
+	}))
+
+	writeJSON(w, http.StatusOK, metadataToResponse(meta))
+}
+
+// HandleUpdateLifecycle transitions the lifecycle state.
+// PATCH /api/items/{partNumber}/metadata/lifecycle
+func (s *Server) HandleUpdateLifecycle(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	partNumber := chi.URLParam(r, "partNumber")
+
+	item, err := s.items.GetByPartNumber(ctx, partNumber)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get item")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get item")
+		return
+	}
+	if item == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Item not found")
+		return
+	}
+
+	var req struct {
+		State string `json:"state"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid_body", "Invalid JSON body")
+		return
+	}
+	if req.State == "" {
+		writeError(w, http.StatusBadRequest, "invalid_body", "State is required")
+		return
+	}
+
+	meta, err := s.metadata.Get(ctx, item.ID)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get metadata")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get metadata")
+		return
+	}
+	if meta == nil {
+		writeError(w, http.StatusNotFound, "not_found", "No metadata indexed for this item")
+		return
+	}
+
+	// Validate transition
+	allowed := validTransitions[meta.LifecycleState]
+	valid := false
+	for _, s := range allowed {
+		if s == req.State {
+			valid = true
+			break
+		}
+	}
+	if !valid {
+		writeError(w, http.StatusUnprocessableEntity, "invalid_transition",
+			"Cannot transition from '"+meta.LifecycleState+"' to '"+req.State+"'")
+		return
+	}
+
+	username := ""
+	if user := auth.UserFromContext(ctx); user != nil {
+		username = user.Username
+	}
+
+	fromState := meta.LifecycleState
+	if err := s.metadata.UpdateLifecycle(ctx, item.ID, req.State, username); err != nil {
+		s.logger.Error().Err(err).Msg("failed to update lifecycle")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to update lifecycle")
+		return
+	}
+
+	s.broker.Publish("metadata.lifecycle", mustMarshal(map[string]any{
+		"part_number": partNumber,
+		"from_state":  fromState,
+		"to_state":    req.State,
+		"updated_by":  username,
+	}))
+
+	writeJSON(w, http.StatusOK, map[string]string{"lifecycle_state": req.State})
+}
+
+// HandleUpdateTags adds/removes tags.
+// PATCH /api/items/{partNumber}/metadata/tags
+func (s *Server) HandleUpdateTags(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+	partNumber := chi.URLParam(r, "partNumber")
+
+	item, err := s.items.GetByPartNumber(ctx, partNumber)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get item")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get item")
+		return
+	}
+	if item == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Item not found")
+		return
+	}
+
+	var req struct {
+		Add    []string `json:"add"`
+		Remove []string `json:"remove"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid_body", "Invalid JSON body")
+		return
+	}
+	if len(req.Add) == 0 && len(req.Remove) == 0 {
+		writeError(w, http.StatusBadRequest, "invalid_body", "Must provide 'add' or 'remove'")
+		return
+	}
+
+	meta, err := s.metadata.Get(ctx, item.ID)
+	if err != nil {
+		s.logger.Error().Err(err).Msg("failed to get metadata")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to get metadata")
+		return
+	}
+	if meta == nil {
+		writeError(w, http.StatusNotFound, "not_found", "No metadata indexed for this item")
+		return
+	}
+
+	// Compute new tag set: (existing + add) - remove
+	tagSet := make(map[string]struct{})
+	for _, t := range meta.Tags {
+		tagSet[t] = struct{}{}
+	}
+	for _, t := range req.Add {
+		tagSet[t] = struct{}{}
+	}
+	removeSet := make(map[string]struct{})
+	for _, t := range req.Remove {
+		removeSet[t] = struct{}{}
+	}
+	var newTags []string
+	for t := range tagSet {
+		if _, removed := removeSet[t]; !removed {
+			newTags = append(newTags, t)
+		}
+	}
+	if newTags == nil {
+		newTags = []string{}
+	}
+
+	username := ""
+	if user := auth.UserFromContext(ctx); user != nil {
+		username = user.Username
+	}
+
+	if err := s.metadata.SetTags(ctx, item.ID, newTags, username); err != nil {
+		s.logger.Error().Err(err).Msg("failed to update tags")
+		writeError(w, http.StatusInternalServerError, "internal_error", "Failed to update tags")
+		return
+	}
+
+	s.broker.Publish("metadata.tags", mustMarshal(map[string]any{
+		"part_number": partNumber,
+		"added":       req.Add,
+		"removed":     req.Remove,
+	}))
+
+	writeJSON(w, http.StatusOK, map[string]any{"tags": newTags})
+}
+
+// extractKCMetadata attempts to extract and index silo/ metadata from an
+// uploaded .kc file. Failures are logged but non-fatal for Phase 1.
+func (s *Server) extractKCMetadata(ctx context.Context, item *db.Item, fileKey string, rev *db.Revision) {
+	if s.storage == nil {
+		return
+	}
+
+	reader, err := s.storage.Get(ctx, fileKey)
+	if err != nil {
+		s.logger.Warn().Err(err).Str("file_key", fileKey).Msg("kc: failed to read back file for extraction")
+		return
+	}
+	defer reader.Close()
+
+	data, err := io.ReadAll(reader)
+	if err != nil {
+		s.logger.Warn().Err(err).Msg("kc: failed to read file bytes")
+		return
+	}
+
+	result, err := kc.Extract(data)
+	if err != nil {
+		s.logger.Warn().Err(err).Str("part_number", item.PartNumber).Msg("kc: extraction failed")
+		return
+	}
+	if result == nil {
+		return // plain .fcstd, no silo/ directory
+	}
+
+	// Validate manifest UUID matches item
+	if result.Manifest != nil && result.Manifest.UUID != "" && result.Manifest.UUID != item.ID {
+		s.logger.Warn().
+			Str("manifest_uuid", result.Manifest.UUID).
+			Str("item_id", item.ID).
+			Msg("kc: manifest UUID does not match item, skipping indexing")
+		return
+	}
+
+	// Check for no-op (revision_hash unchanged)
+	if result.Manifest != nil && result.Manifest.RevisionHash != "" {
+		existing, _ := s.metadata.Get(ctx, item.ID)
+		if existing != nil && existing.RevisionHash != nil && *existing.RevisionHash == result.Manifest.RevisionHash {
+			s.logger.Debug().Str("part_number", item.PartNumber).Msg("kc: revision_hash unchanged, skipping")
+			return
+		}
+	}
+
+	username := ""
+	if rev.CreatedBy != nil {
+		username = *rev.CreatedBy
+	}
+
+	meta := &db.ItemMetadata{
+		ItemID:         item.ID,
+		LifecycleState: "draft",
+		Fields:         make(map[string]any),
+		Tags:           []string{},
+		UpdatedBy:      strPtr(username),
+	}
+
+	if result.Manifest != nil {
+		meta.KCVersion = strPtr(result.Manifest.KCVersion)
+		meta.ManifestUUID = strPtr(result.Manifest.UUID)
+		meta.SiloInstance = strPtr(result.Manifest.SiloInstance)
+		meta.RevisionHash = strPtr(result.Manifest.RevisionHash)
+	}
+
+	if result.Metadata != nil {
+		meta.SchemaName = strPtr(result.Metadata.SchemaName)
+		if result.Metadata.Tags != nil {
+			meta.Tags = result.Metadata.Tags
+		}
+		if result.Metadata.LifecycleState != "" {
+			meta.LifecycleState = result.Metadata.LifecycleState
+		}
+		if result.Metadata.Fields != nil {
+			meta.Fields = result.Metadata.Fields
+		}
+	}
+
+	if err := s.metadata.Upsert(ctx, meta); err != nil {
+		s.logger.Warn().Err(err).Str("part_number", item.PartNumber).Msg("kc: failed to upsert metadata")
+		return
+	}
+
+	s.broker.Publish("metadata.updated", mustMarshal(map[string]any{
+		"part_number":     item.PartNumber,
+		"lifecycle_state": meta.LifecycleState,
+		"updated_by":      username,
+	}))
+
+	// Index dependencies from silo/dependencies.json.
+	if result.Dependencies != nil {
+		dbDeps := make([]*db.ItemDependency, len(result.Dependencies))
+		for i, d := range result.Dependencies {
+			pn := d.PartNumber
+			rev := d.Revision
+			qty := d.Quantity
+			label := d.Label
+			rel := d.Relationship
+			if rel == "" {
+				rel = "component"
+			}
+			dbDeps[i] = &db.ItemDependency{
+				ParentItemID:    item.ID,
+				ChildUUID:       d.UUID,
+				ChildPartNumber: &pn,
+				ChildRevision:   &rev,
+				Quantity:        &qty,
+				Label:           &label,
+				Relationship:    rel,
+			}
+		}
+		if err := s.deps.ReplaceForRevision(ctx, item.ID, rev.RevisionNumber, dbDeps); err != nil {
+			s.logger.Warn().Err(err).Str("part_number", item.PartNumber).Msg("kc: failed to index dependencies")
+		} else {
+			s.broker.Publish("dependencies.changed", mustMarshal(map[string]any{
+				"part_number": item.PartNumber,
+				"count":       len(dbDeps),
+			}))
+		}
+	}
+
+	// Index macros from silo/macros/*.
+	if len(result.Macros) > 0 {
+		dbMacros := make([]*db.ItemMacro, len(result.Macros))
+		for i, m := range result.Macros {
+			dbMacros[i] = &db.ItemMacro{
+				ItemID:   item.ID,
+				Filename: m.Filename,
+				Trigger:  "manual",
+				Content:  m.Content,
+			}
+		}
+		if err := s.macros.ReplaceForItem(ctx, item.ID, rev.RevisionNumber, dbMacros); err != nil {
+			s.logger.Warn().Err(err).Str("part_number", item.PartNumber).Msg("kc: failed to index macros")
+		} else {
+			s.broker.Publish("macros.changed", mustMarshal(map[string]any{
+				"part_number": item.PartNumber,
+				"count":       len(dbMacros),
+			}))
+		}
+	}
+
+	s.logger.Info().Str("part_number", item.PartNumber).Msg("kc: metadata indexed successfully")
+}
+
+// strPtr returns a pointer to s, or nil if s is empty.
+func strPtr(s string) *string {
+	if s == "" {
+		return nil
+	}
+	return &s
+}
+
+// fieldKeys returns the keys from a map.
+func fieldKeys(m map[string]any) []string {
+	keys := make([]string, 0, len(m))
+	for k := range m {
+		keys = append(keys, k)
+	}
+	return keys
+}

internal/api/middleware.go

@@ -183,6 +183,22 @@ func (s *Server) RequireRunnerAuth(next http.Handler) http.Handler {
 	})
 }
 
+// RequireModule returns middleware that rejects requests with 404 when
+// the named module is not enabled.
+func (s *Server) RequireModule(id string) func(http.Handler) http.Handler {
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			if !s.modules.IsEnabled(id) {
+				w.Header().Set("Content-Type", "application/json")
+				w.WriteHeader(http.StatusNotFound)
+				w.Write([]byte(`{"error":"module '` + id + `' is not enabled"}`))
+				return
+			}
+			next.ServeHTTP(w, r)
+		})
+	}
+}
+
 func extractBearerToken(r *http.Request) string {
 	h := r.Header.Get("Authorization")
 	if strings.HasPrefix(h, "Bearer ") {

internal/api/pack_handlers.go

@@ -0,0 +1,135 @@
+package api
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"time"
+
+	"github.com/kindredsystems/silo/internal/db"
+	"github.com/kindredsystems/silo/internal/kc"
+)
+
+// packKCFile gathers DB state and repacks silo/ entries in a .kc file.
+func (s *Server) packKCFile(ctx context.Context, data []byte, item *db.Item, rev *db.Revision, meta *db.ItemMetadata) ([]byte, error) {
+	manifest := &kc.Manifest{
+		UUID:         item.ID,
+		KCVersion:    derefStr(meta.KCVersion, "1.0"),
+		RevisionHash: derefStr(meta.RevisionHash, ""),
+		SiloInstance: derefStr(meta.SiloInstance, ""),
+	}
+
+	metadata := &kc.Metadata{
+		SchemaName:     derefStr(meta.SchemaName, ""),
+		Tags:           meta.Tags,
+		LifecycleState: meta.LifecycleState,
+		Fields:         meta.Fields,
+	}
+
+	// Build history from last 20 revisions.
+	revisions, err := s.items.GetRevisions(ctx, item.ID)
+	if err != nil {
+		return nil, fmt.Errorf("getting revisions: %w", err)
+	}
+	limit := 20
+	if len(revisions) < limit {
+		limit = len(revisions)
+	}
+	history := make([]kc.HistoryEntry, limit)
+	for i, r := range revisions[:limit] {
+		labels := r.Labels
+		if labels == nil {
+			labels = []string{}
+		}
+		history[i] = kc.HistoryEntry{
+			RevisionNumber: r.RevisionNumber,
+			CreatedAt:      r.CreatedAt.UTC().Format(time.RFC3339),
+			CreatedBy:      r.CreatedBy,
+			Comment:        r.Comment,
+			Status:         r.Status,
+			Labels:         labels,
+		}
+	}
+
+	// Build dependencies from item_dependencies table.
+	var deps []kc.Dependency
+	dbDeps, err := s.deps.ListByItem(ctx, item.ID)
+	if err != nil {
+		s.logger.Warn().Err(err).Str("part_number", item.PartNumber).Msg("kc: failed to query dependencies for packing")
+	} else {
+		deps = make([]kc.Dependency, len(dbDeps))
+		for i, d := range dbDeps {
+			deps[i] = kc.Dependency{
+				UUID:         d.ChildUUID,
+				PartNumber:   derefStr(d.ChildPartNumber, ""),
+				Revision:     derefInt(d.ChildRevision, 0),
+				Quantity:     derefFloat(d.Quantity, 0),
+				Label:        derefStr(d.Label, ""),
+				Relationship: d.Relationship,
+			}
+		}
+	}
+	if deps == nil {
+		deps = []kc.Dependency{}
+	}
+
+	input := &kc.PackInput{
+		Manifest:     manifest,
+		Metadata:     metadata,
+		History:      history,
+		Dependencies: deps,
+	}
+
+	return kc.Pack(data, input)
+}
+
+// computeETag generates a quoted ETag from the revision number and metadata freshness.
+func computeETag(rev *db.Revision, meta *db.ItemMetadata) string {
+	var ts int64
+	if meta != nil {
+		ts = meta.UpdatedAt.UnixNano()
+	} else {
+		ts = rev.CreatedAt.UnixNano()
+	}
+	raw := fmt.Sprintf("%d:%d", rev.RevisionNumber, ts)
+	h := sha256.Sum256([]byte(raw))
+	return `"` + hex.EncodeToString(h[:8]) + `"`
+}
+
+// canSkipRepack returns true if the stored blob already has up-to-date silo/ data.
+func canSkipRepack(rev *db.Revision, meta *db.ItemMetadata) bool {
+	if meta == nil {
+		return true // no metadata row = plain .fcstd
+	}
+	if meta.RevisionHash != nil && rev.FileChecksum != nil &&
+		*meta.RevisionHash == *rev.FileChecksum &&
+		meta.UpdatedAt.Before(rev.CreatedAt) {
+		return true
+	}
+	return false
+}
+
+// derefStr returns the value of a *string pointer, or fallback if nil.
+func derefStr(p *string, fallback string) string {
+	if p != nil {
+		return *p
+	}
+	return fallback
+}
+
+// derefInt returns the value of a *int pointer, or fallback if nil.
+func derefInt(p *int, fallback int) int {
+	if p != nil {
+		return *p
+	}
+	return fallback
+}
+
+// derefFloat returns the value of a *float64 pointer, or fallback if nil.
+func derefFloat(p *float64, fallback float64) float64 {
+	if p != nil {
+		return *p
+	}
+	return fallback
+}

internal/api/routes.go

@@ -58,6 +58,7 @@ func NewRouter(server *Server, logger zerolog.Logger) http.Handler {
 	r.Get("/auth/callback", server.HandleOIDCCallback)
 
 	// Public API endpoints (no auth required)
+	r.Get("/api/modules", server.HandleGetModules)
 	r.Get("/api/auth/config", server.HandleAuthConfig)
 
 	// API routes (require auth, no CSRF — token auth instead)
@@ -101,6 +102,7 @@ func NewRouter(server *Server, logger zerolog.Logger) http.Handler {
 
 		// Projects (read: viewer, write: editor)
 		r.Route("/projects", func(r chi.Router) {
+			r.Use(server.RequireModule("projects"))
 			r.Get("/", server.HandleListProjects)
 			r.Get("/{code}", server.HandleGetProject)
 			r.Get("/{code}/items", server.HandleGetProjectItems)
@@ -115,6 +117,26 @@ func NewRouter(server *Server, logger zerolog.Logger) http.Handler {
 			})
 		})
 
+		// Locations (read: viewer, write: editor)
+		r.Route("/locations", func(r chi.Router) {
+			r.Get("/", server.HandleListLocations)
+
+			r.Group(func(r chi.Router) {
+				r.Use(server.RequireWritable)
+				r.Use(server.RequireRole(auth.RoleEditor))
+				r.Post("/", server.HandleCreateLocation)
+			})
+
+			// Wildcard routes for path-based lookup (e.g., /api/locations/lab/shelf-a/bin-3)
+			r.Get("/*", server.HandleGetLocation)
+			r.Group(func(r chi.Router) {
+				r.Use(server.RequireWritable)
+				r.Use(server.RequireRole(auth.RoleEditor))
+				r.Put("/*", server.HandleUpdateLocation)
+				r.Delete("/*", server.HandleDeleteLocation)
+			})
+		})
+
 		// Items (read: viewer, write: editor)
 		r.Route("/items", func(r chi.Router) {
 			r.Get("/", server.HandleListItems)
@@ -140,6 +162,7 @@ func NewRouter(server *Server, logger zerolog.Logger) http.Handler {
 				r.Get("/revisions/compare", server.HandleCompareRevisions)
 				r.Get("/revisions/{revision}", server.HandleGetRevision)
 				r.Get("/files", server.HandleListItemFiles)
+				r.Get("/files/{fileId}/download", server.HandleDownloadItemFile)
 				r.Get("/file", server.HandleDownloadLatestFile)
 				r.Get("/file/{revision}", server.HandleDownloadFile)
 				r.Get("/bom", server.HandleGetBOM)
@@ -149,11 +172,26 @@ func NewRouter(server *Server, logger zerolog.Logger) http.Handler {
 				r.Get("/bom/where-used", server.HandleGetWhereUsed)
 				r.Get("/bom/export.csv", server.HandleExportBOMCSV)
 				r.Get("/bom/export.ods", server.HandleExportBOMODS)
+				r.Get("/metadata", server.HandleGetMetadata)
+				r.Get("/dependencies", server.HandleGetDependencies)
+				r.Get("/dependencies/resolve", server.HandleResolveDependencies)
+				r.Get("/macros", server.HandleGetMacros)
+				r.Get("/macros/{filename}", server.HandleGetMacro)
 
-				// DAG (read: viewer, write: editor)
-				r.Get("/dag", server.HandleGetDAG)
-				r.Get("/dag/forward-cone/{nodeKey}", server.HandleGetForwardCone)
-				r.Get("/dag/dirty", server.HandleGetDirtySubgraph)
+				// DAG (gated by dag module)
+				r.Route("/dag", func(r chi.Router) {
+					r.Use(server.RequireModule("dag"))
+					r.Get("/", server.HandleGetDAG)
+					r.Get("/forward-cone/{nodeKey}", server.HandleGetForwardCone)
+					r.Get("/dirty", server.HandleGetDirtySubgraph)
+
+					r.Group(func(r chi.Router) {
+						r.Use(server.RequireWritable)
+						r.Use(server.RequireRole(auth.RoleEditor))
+						r.Put("/", server.HandleSyncDAG)
+						r.Post("/mark-dirty/{nodeKey}", server.HandleMarkDirty)
+					})
+				})
 
 				r.Group(func(r chi.Router) {
 					r.Use(server.RequireWritable)
@@ -167,27 +205,32 @@ func NewRouter(server *Server, logger zerolog.Logger) http.Handler {
 					r.Post("/revisions/{revision}/rollback", server.HandleRollbackRevision)
 					r.Post("/file", server.HandleUploadFile)
 					r.Post("/files", server.HandleAssociateItemFile)
+					r.Post("/files/upload", server.HandleUploadItemFile)
 					r.Delete("/files/{fileId}", server.HandleDeleteItemFile)
 					r.Put("/thumbnail", server.HandleSetItemThumbnail)
+					r.Post("/thumbnail/upload", server.HandleUploadItemThumbnail)
 					r.Post("/bom", server.HandleAddBOMEntry)
 					r.Post("/bom/import", server.HandleImportBOMCSV)
 					r.Post("/bom/merge", server.HandleMergeBOM)
 					r.Put("/bom/{childPartNumber}", server.HandleUpdateBOMEntry)
 					r.Delete("/bom/{childPartNumber}", server.HandleDeleteBOMEntry)
-					r.Put("/dag", server.HandleSyncDAG)
-					r.Post("/dag/mark-dirty/{nodeKey}", server.HandleMarkDirty)
+					r.Put("/metadata", server.HandleUpdateMetadata)
+					r.Patch("/metadata/lifecycle", server.HandleUpdateLifecycle)
+					r.Patch("/metadata/tags", server.HandleUpdateTags)
 				})
 			})
 		})
 
 		// Audit (read-only, viewer role)
 		r.Route("/audit", func(r chi.Router) {
+			r.Use(server.RequireModule("audit"))
 			r.Get("/completeness", server.HandleAuditCompleteness)
 			r.Get("/completeness/{partNumber}", server.HandleAuditItemDetail)
 		})
 
 		// Integrations (read: viewer, write: editor)
 		r.Route("/integrations/odoo", func(r chi.Router) {
+			r.Use(server.RequireModule("odoo"))
 			r.Get("/config", server.HandleGetOdooConfig)
 			r.Get("/sync-log", server.HandleGetOdooSyncLog)
 
@@ -210,6 +253,7 @@ func NewRouter(server *Server, logger zerolog.Logger) http.Handler {
 
 		// Jobs (read: viewer, write: editor)
 		r.Route("/jobs", func(r chi.Router) {
+			r.Use(server.RequireModule("jobs"))
 			r.Get("/", server.HandleListJobs)
 			r.Get("/{jobID}", server.HandleGetJob)
 			r.Get("/{jobID}/logs", server.HandleGetJobLogs)
@@ -224,6 +268,7 @@ func NewRouter(server *Server, logger zerolog.Logger) http.Handler {
 
 		// Job definitions (read: viewer, reload: admin)
 		r.Route("/job-definitions", func(r chi.Router) {
+			r.Use(server.RequireModule("jobs"))
 			r.Get("/", server.HandleListJobDefinitions)
 			r.Get("/{name}", server.HandleGetJobDefinition)
 
@@ -235,6 +280,7 @@ func NewRouter(server *Server, logger zerolog.Logger) http.Handler {
 
 		// Runners (admin)
 		r.Route("/runners", func(r chi.Router) {
+			r.Use(server.RequireModule("jobs"))
 			r.Use(server.RequireRole(auth.RoleAdmin))
 			r.Get("/", server.HandleListRunners)
 			r.Post("/", server.HandleRegisterRunner)
@@ -247,10 +293,20 @@ func NewRouter(server *Server, logger zerolog.Logger) http.Handler {
 			r.Use(server.RequireRole(auth.RoleEditor))
 			r.Post("/generate-part-number", server.HandleGeneratePartNumber)
 		})
+
+		// Admin settings (admin only)
+		r.Route("/admin/settings", func(r chi.Router) {
+			r.Use(server.RequireRole(auth.RoleAdmin))
+			r.Get("/", server.HandleGetAllSettings)
+			r.Get("/{module}", server.HandleGetModuleSettings)
+			r.Put("/{module}", server.HandleUpdateModuleSettings)
+			r.Post("/{module}/test", server.HandleTestModuleConnectivity)
+		})
 	})
 
 	// Runner-facing API (runner token auth, not user auth)
 	r.Route("/api/runner", func(r chi.Router) {
+		r.Use(server.RequireModule("jobs"))
 		r.Use(server.RequireRunnerAuth)
 		r.Post("/heartbeat", server.HandleRunnerHeartbeat)
 		r.Post("/claim", server.HandleRunnerClaim)

internal/api/servermode.go

@@ -26,13 +26,13 @@ type ServerState struct {
 	mu        sync.RWMutex
 	readOnly  bool
 	storageOK bool
-	storage   *storage.Storage
+	storage   storage.FileStore
 	broker    *Broker
 	done      chan struct{}
 }
 
 // NewServerState creates a new server state tracker.
-func NewServerState(logger zerolog.Logger, store *storage.Storage, broker *Broker) *ServerState {
+func NewServerState(logger zerolog.Logger, store storage.FileStore, broker *Broker) *ServerState {
 	return &ServerState{
 		logger:    logger.With().Str("component", "server-state").Logger(),
 		storageOK: store != nil, // assume healthy if configured

internal/api/settings_handlers.go

@@ -0,0 +1,316 @@
+package api
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/kindredsystems/silo/internal/auth"
+)
+
+// HandleGetAllSettings returns the full config grouped by module with secrets redacted.
+func (s *Server) HandleGetAllSettings(w http.ResponseWriter, r *http.Request) {
+	resp := map[string]any{
+		"core":     s.buildCoreSettings(),
+		"schemas":  s.buildSchemasSettings(),
+		"storage":  s.buildStorageSettings(r.Context()),
+		"database": s.buildDatabaseSettings(r.Context()),
+		"auth":     s.buildAuthSettings(),
+		"projects": map[string]any{"enabled": s.modules.IsEnabled("projects")},
+		"audit":    map[string]any{"enabled": s.modules.IsEnabled("audit")},
+		"odoo":     s.buildOdooSettings(),
+		"freecad":  s.buildFreecadSettings(),
+		"jobs":     s.buildJobsSettings(),
+		"dag":      map[string]any{"enabled": s.modules.IsEnabled("dag")},
+	}
+	writeJSON(w, http.StatusOK, resp)
+}
+
+// HandleGetModuleSettings returns settings for a single module.
+func (s *Server) HandleGetModuleSettings(w http.ResponseWriter, r *http.Request) {
+	module := chi.URLParam(r, "module")
+
+	var settings any
+	switch module {
+	case "core":
+		settings = s.buildCoreSettings()
+	case "schemas":
+		settings = s.buildSchemasSettings()
+	case "storage":
+		settings = s.buildStorageSettings(r.Context())
+	case "database":
+		settings = s.buildDatabaseSettings(r.Context())
+	case "auth":
+		settings = s.buildAuthSettings()
+	case "projects":
+		settings = map[string]any{"enabled": s.modules.IsEnabled("projects")}
+	case "audit":
+		settings = map[string]any{"enabled": s.modules.IsEnabled("audit")}
+	case "odoo":
+		settings = s.buildOdooSettings()
+	case "freecad":
+		settings = s.buildFreecadSettings()
+	case "jobs":
+		settings = s.buildJobsSettings()
+	case "dag":
+		settings = map[string]any{"enabled": s.modules.IsEnabled("dag")}
+	default:
+		writeError(w, http.StatusNotFound, "not_found", "Unknown module: "+module)
+		return
+	}
+
+	writeJSON(w, http.StatusOK, settings)
+}
+
+// HandleUpdateModuleSettings handles module toggle and config overrides.
+func (s *Server) HandleUpdateModuleSettings(w http.ResponseWriter, r *http.Request) {
+	module := chi.URLParam(r, "module")
+
+	// Validate module exists
+	if s.modules.Get(module) == nil {
+		writeError(w, http.StatusNotFound, "not_found", "Unknown module: "+module)
+		return
+	}
+
+	var body map[string]any
+	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid_json", err.Error())
+		return
+	}
+
+	user := auth.UserFromContext(r.Context())
+	username := "system"
+	if user != nil {
+		username = user.Username
+	}
+
+	var updated []string
+	restartRequired := false
+
+	// Handle module toggle
+	if enabledVal, ok := body["enabled"]; ok {
+		enabled, ok := enabledVal.(bool)
+		if !ok {
+			writeError(w, http.StatusBadRequest, "invalid_value", "'enabled' must be a boolean")
+			return
+		}
+
+		if err := s.modules.SetEnabled(module, enabled); err != nil {
+			writeError(w, http.StatusBadRequest, "toggle_failed", err.Error())
+			return
+		}
+
+		if err := s.settings.SetModuleState(r.Context(), module, enabled, username); err != nil {
+			s.logger.Error().Err(err).Str("module", module).Msg("failed to persist module state")
+			writeError(w, http.StatusInternalServerError, "persist_failed", "Failed to save module state")
+			return
+		}
+
+		updated = append(updated, module+".enabled")
+	}
+
+	// Handle config overrides (future use — persisted but not hot-reloaded)
+	for key, value := range body {
+		if key == "enabled" {
+			continue
+		}
+
+		fullKey := module + "." + key
+		if err := s.settings.SetOverride(r.Context(), fullKey, value, username); err != nil {
+			s.logger.Error().Err(err).Str("key", fullKey).Msg("failed to persist setting override")
+			writeError(w, http.StatusInternalServerError, "persist_failed", "Failed to save setting: "+key)
+			return
+		}
+		updated = append(updated, fullKey)
+
+		// These namespaces require a restart to take effect
+		if strings.HasPrefix(fullKey, "database.") ||
+			strings.HasPrefix(fullKey, "storage.") ||
+			strings.HasPrefix(fullKey, "server.") ||
+			strings.HasPrefix(fullKey, "schemas.") {
+			restartRequired = true
+		}
+	}
+
+	writeJSON(w, http.StatusOK, map[string]any{
+		"updated":          updated,
+		"restart_required": restartRequired,
+	})
+
+	// Publish SSE event
+	s.broker.Publish("settings.changed", mustMarshal(map[string]any{
+		"module":       module,
+		"changed_keys": updated,
+		"updated_by":   username,
+	}))
+}
+
+// HandleTestModuleConnectivity tests external connectivity for a module.
+func (s *Server) HandleTestModuleConnectivity(w http.ResponseWriter, r *http.Request) {
+	module := chi.URLParam(r, "module")
+
+	start := time.Now()
+	var success bool
+	var message string
+
+	switch module {
+	case "database":
+		if err := s.db.Pool().Ping(r.Context()); err != nil {
+			success = false
+			message = "Database ping failed: " + err.Error()
+		} else {
+			success = true
+			message = "Database connection OK"
+		}
+	case "storage":
+		if s.storage == nil {
+			success = false
+			message = "Storage not configured"
+		} else if err := s.storage.Ping(r.Context()); err != nil {
+			success = false
+			message = "Storage ping failed: " + err.Error()
+		} else {
+			success = true
+			message = "Storage connection OK"
+		}
+	case "auth", "odoo":
+		success = false
+		message = "Connectivity test not implemented for " + module
+	default:
+		writeError(w, http.StatusBadRequest, "not_testable", "No connectivity test available for module: "+module)
+		return
+	}
+
+	latency := time.Since(start).Milliseconds()
+
+	writeJSON(w, http.StatusOK, map[string]any{
+		"success":    success,
+		"message":    message,
+		"latency_ms": latency,
+	})
+}
+
+// --- build helpers (read config, redact secrets) ---
+
+func redact(s string) string {
+	if s == "" {
+		return ""
+	}
+	return "****"
+}
+
+func (s *Server) buildCoreSettings() map[string]any {
+	return map[string]any{
+		"enabled":  true,
+		"host":     s.cfg.Server.Host,
+		"port":     s.cfg.Server.Port,
+		"base_url": s.cfg.Server.BaseURL,
+		"readonly": s.cfg.Server.ReadOnly,
+	}
+}
+
+func (s *Server) buildSchemasSettings() map[string]any {
+	return map[string]any{
+		"enabled":   true,
+		"directory": s.cfg.Schemas.Directory,
+		"default":   s.cfg.Schemas.Default,
+		"count":     len(s.schemas),
+	}
+}
+
+func (s *Server) buildStorageSettings(ctx context.Context) map[string]any {
+	result := map[string]any{
+		"enabled":  true,
+		"endpoint": s.cfg.Storage.Endpoint,
+		"bucket":   s.cfg.Storage.Bucket,
+		"use_ssl":  s.cfg.Storage.UseSSL,
+		"region":   s.cfg.Storage.Region,
+	}
+	if s.storage != nil {
+		if err := s.storage.Ping(ctx); err != nil {
+			result["status"] = "unavailable"
+		} else {
+			result["status"] = "ok"
+		}
+	} else {
+		result["status"] = "not_configured"
+	}
+	return result
+}
+
+func (s *Server) buildDatabaseSettings(ctx context.Context) map[string]any {
+	result := map[string]any{
+		"enabled":         true,
+		"host":            s.cfg.Database.Host,
+		"port":            s.cfg.Database.Port,
+		"name":            s.cfg.Database.Name,
+		"user":            s.cfg.Database.User,
+		"password":        redact(s.cfg.Database.Password),
+		"sslmode":         s.cfg.Database.SSLMode,
+		"max_connections": s.cfg.Database.MaxConnections,
+	}
+	if err := s.db.Pool().Ping(ctx); err != nil {
+		result["status"] = "unavailable"
+	} else {
+		result["status"] = "ok"
+	}
+	return result
+}
+
+func (s *Server) buildAuthSettings() map[string]any {
+	return map[string]any{
+		"enabled":        s.modules.IsEnabled("auth"),
+		"session_secret": redact(s.cfg.Auth.SessionSecret),
+		"local": map[string]any{
+			"enabled":                s.cfg.Auth.Local.Enabled,
+			"default_admin_username": s.cfg.Auth.Local.DefaultAdminUsername,
+			"default_admin_password": redact(s.cfg.Auth.Local.DefaultAdminPassword),
+		},
+		"ldap": map[string]any{
+			"enabled":       s.cfg.Auth.LDAP.Enabled,
+			"url":           s.cfg.Auth.LDAP.URL,
+			"base_dn":       s.cfg.Auth.LDAP.BaseDN,
+			"bind_dn":       s.cfg.Auth.LDAP.BindDN,
+			"bind_password": redact(s.cfg.Auth.LDAP.BindPassword),
+		},
+		"oidc": map[string]any{
+			"enabled":       s.cfg.Auth.OIDC.Enabled,
+			"issuer_url":    s.cfg.Auth.OIDC.IssuerURL,
+			"client_id":     s.cfg.Auth.OIDC.ClientID,
+			"client_secret": redact(s.cfg.Auth.OIDC.ClientSecret),
+			"redirect_url":  s.cfg.Auth.OIDC.RedirectURL,
+		},
+	}
+}
+
+func (s *Server) buildOdooSettings() map[string]any {
+	return map[string]any{
+		"enabled":  s.modules.IsEnabled("odoo"),
+		"url":      s.cfg.Odoo.URL,
+		"database": s.cfg.Odoo.Database,
+		"username": s.cfg.Odoo.Username,
+		"api_key":  redact(s.cfg.Odoo.APIKey),
+	}
+}
+
+func (s *Server) buildFreecadSettings() map[string]any {
+	return map[string]any{
+		"enabled":    s.modules.IsEnabled("freecad"),
+		"uri_scheme": s.cfg.FreeCAD.URIScheme,
+		"executable": s.cfg.FreeCAD.Executable,
+	}
+}
+
+func (s *Server) buildJobsSettings() map[string]any {
+	return map[string]any{
+		"enabled":           s.modules.IsEnabled("jobs"),
+		"directory":         s.cfg.Jobs.Directory,
+		"runner_timeout":    s.cfg.Jobs.RunnerTimeout,
+		"job_timeout_check": s.cfg.Jobs.JobTimeoutCheck,
+		"default_priority":  s.cfg.Jobs.DefaultPriority,
+		"definitions_count": len(s.jobDefs),
+	}
+}

internal/api/settings_handlers_test.go

@@ -0,0 +1,285 @@
+package api
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/kindredsystems/silo/internal/auth"
+	"github.com/kindredsystems/silo/internal/config"
+	"github.com/kindredsystems/silo/internal/db"
+	"github.com/kindredsystems/silo/internal/modules"
+	"github.com/kindredsystems/silo/internal/schema"
+	"github.com/kindredsystems/silo/internal/testutil"
+	"github.com/rs/zerolog"
+)
+
+func newSettingsTestServer(t *testing.T) *Server {
+	t.Helper()
+	pool := testutil.MustConnectTestPool(t)
+	database := db.NewFromPool(pool)
+	broker := NewBroker(zerolog.Nop())
+	state := NewServerState(zerolog.Nop(), nil, broker)
+	cfg := &config.Config{
+		Server: config.ServerConfig{Host: "0.0.0.0", Port: 8080},
+		Database: config.DatabaseConfig{
+			Host: "localhost", Port: 5432, Name: "silo_test",
+			User: "silo", Password: "secret", SSLMode: "disable",
+			MaxConnections: 10,
+		},
+		Storage: config.StorageConfig{
+			Endpoint: "minio:9000", Bucket: "silo", Region: "us-east-1",
+			AccessKey: "minioadmin", SecretKey: "miniosecret",
+		},
+		Schemas: config.SchemasConfig{Directory: "/etc/silo/schemas", Default: "kindred-rd"},
+		Auth: config.AuthConfig{
+			SessionSecret: "supersecret",
+			Local:         config.LocalAuth{Enabled: true, DefaultAdminUsername: "admin", DefaultAdminPassword: "changeme"},
+			LDAP:          config.LDAPAuth{Enabled: false, BindPassword: "ldapsecret"},
+			OIDC:          config.OIDCAuth{Enabled: false, ClientSecret: "oidcsecret"},
+		},
+		FreeCAD: config.FreeCADConfig{URIScheme: "silo"},
+		Odoo:    config.OdooConfig{URL: "https://odoo.example.com", APIKey: "odoo-api-key"},
+		Jobs:    config.JobsConfig{Directory: "/etc/silo/jobdefs", RunnerTimeout: 90, JobTimeoutCheck: 30, DefaultPriority: 100},
+	}
+	return NewServer(
+		zerolog.Nop(),
+		database,
+		map[string]*schema.Schema{"test": {Name: "test"}},
+		cfg.Schemas.Directory,
+		nil, // storage
+		nil, // authService
+		nil, // sessionManager
+		nil, // oidcBackend
+		nil, // authConfig
+		broker,
+		state,
+		nil,                   // jobDefs
+		"",                    // jobDefsDir
+		modules.NewRegistry(), // modules
+		cfg,
+	)
+}
+
+func newSettingsRouter(s *Server) http.Handler {
+	r := chi.NewRouter()
+	r.Route("/api/admin/settings", func(r chi.Router) {
+		r.Get("/", s.HandleGetAllSettings)
+		r.Get("/{module}", s.HandleGetModuleSettings)
+		r.Put("/{module}", s.HandleUpdateModuleSettings)
+		r.Post("/{module}/test", s.HandleTestModuleConnectivity)
+	})
+	return r
+}
+
+func adminSettingsRequest(r *http.Request) *http.Request {
+	u := &auth.User{
+		ID:       "admin-id",
+		Username: "testadmin",
+		Role:     auth.RoleAdmin,
+	}
+	return r.WithContext(auth.ContextWithUser(r.Context(), u))
+}
+
+func viewerSettingsRequest(r *http.Request) *http.Request {
+	u := &auth.User{
+		ID:       "viewer-id",
+		Username: "testviewer",
+		Role:     auth.RoleViewer,
+	}
+	return r.WithContext(auth.ContextWithUser(r.Context(), u))
+}
+
+func TestGetAllSettings(t *testing.T) {
+	s := newSettingsTestServer(t)
+	router := newSettingsRouter(s)
+
+	req := adminSettingsRequest(httptest.NewRequest("GET", "/api/admin/settings", nil))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("status: got %d, want %d; body: %s", w.Code, http.StatusOK, w.Body.String())
+	}
+
+	var resp map[string]any
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("decoding: %v", err)
+	}
+
+	// Verify all module keys present
+	expectedModules := []string{"core", "schemas", "storage", "database", "auth", "projects", "audit", "odoo", "freecad", "jobs", "dag"}
+	for _, mod := range expectedModules {
+		if _, ok := resp[mod]; !ok {
+			t.Errorf("missing module key: %s", mod)
+		}
+	}
+
+	// Verify secrets are redacted
+	dbSettings, _ := resp["database"].(map[string]any)
+	if dbSettings["password"] != "****" {
+		t.Errorf("database password not redacted: got %v", dbSettings["password"])
+	}
+
+	authSettings, _ := resp["auth"].(map[string]any)
+	if authSettings["session_secret"] != "****" {
+		t.Errorf("session_secret not redacted: got %v", authSettings["session_secret"])
+	}
+
+	ldap, _ := authSettings["ldap"].(map[string]any)
+	if ldap["bind_password"] != "****" {
+		t.Errorf("ldap bind_password not redacted: got %v", ldap["bind_password"])
+	}
+
+	oidc, _ := authSettings["oidc"].(map[string]any)
+	if oidc["client_secret"] != "****" {
+		t.Errorf("oidc client_secret not redacted: got %v", oidc["client_secret"])
+	}
+
+	odoo, _ := resp["odoo"].(map[string]any)
+	if odoo["api_key"] != "****" {
+		t.Errorf("odoo api_key not redacted: got %v", odoo["api_key"])
+	}
+}
+
+func TestGetModuleSettings(t *testing.T) {
+	s := newSettingsTestServer(t)
+	router := newSettingsRouter(s)
+
+	req := adminSettingsRequest(httptest.NewRequest("GET", "/api/admin/settings/jobs", nil))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("status: got %d, want %d; body: %s", w.Code, http.StatusOK, w.Body.String())
+	}
+
+	var resp map[string]any
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("decoding: %v", err)
+	}
+
+	if resp["directory"] != "/etc/silo/jobdefs" {
+		t.Errorf("jobs directory: got %v, want /etc/silo/jobdefs", resp["directory"])
+	}
+	if resp["runner_timeout"] != float64(90) {
+		t.Errorf("runner_timeout: got %v, want 90", resp["runner_timeout"])
+	}
+}
+
+func TestGetModuleSettings_Unknown(t *testing.T) {
+	s := newSettingsTestServer(t)
+	router := newSettingsRouter(s)
+
+	req := adminSettingsRequest(httptest.NewRequest("GET", "/api/admin/settings/nonexistent", nil))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusNotFound {
+		t.Errorf("status: got %d, want %d", w.Code, http.StatusNotFound)
+	}
+}
+
+func TestToggleModule(t *testing.T) {
+	s := newSettingsTestServer(t)
+	router := newSettingsRouter(s)
+
+	// Projects is enabled by default; disable it
+	body := `{"enabled": false}`
+	req := adminSettingsRequest(httptest.NewRequest("PUT", "/api/admin/settings/projects", strings.NewReader(body)))
+	req.Header.Set("Content-Type", "application/json")
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("status: got %d, want %d; body: %s", w.Code, http.StatusOK, w.Body.String())
+	}
+
+	var resp map[string]any
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("decoding: %v", err)
+	}
+
+	updated, _ := resp["updated"].([]any)
+	if len(updated) != 1 || updated[0] != "projects.enabled" {
+		t.Errorf("updated: got %v, want [projects.enabled]", updated)
+	}
+
+	// Verify registry state
+	if s.modules.IsEnabled("projects") {
+		t.Error("projects should be disabled after toggle")
+	}
+}
+
+func TestToggleModule_DependencyError(t *testing.T) {
+	s := newSettingsTestServer(t)
+	router := newSettingsRouter(s)
+
+	// DAG depends on Jobs. Jobs is disabled by default.
+	// Enabling DAG without Jobs should fail.
+	body := `{"enabled": true}`
+	req := adminSettingsRequest(httptest.NewRequest("PUT", "/api/admin/settings/dag", strings.NewReader(body)))
+	req.Header.Set("Content-Type", "application/json")
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Errorf("status: got %d, want %d; body: %s", w.Code, http.StatusBadRequest, w.Body.String())
+	}
+}
+
+func TestToggleRequiredModule(t *testing.T) {
+	s := newSettingsTestServer(t)
+	router := newSettingsRouter(s)
+
+	body := `{"enabled": false}`
+	req := adminSettingsRequest(httptest.NewRequest("PUT", "/api/admin/settings/core", strings.NewReader(body)))
+	req.Header.Set("Content-Type", "application/json")
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Errorf("status: got %d, want %d; body: %s", w.Code, http.StatusBadRequest, w.Body.String())
+	}
+}
+
+func TestTestConnectivity_Database(t *testing.T) {
+	s := newSettingsTestServer(t)
+	router := newSettingsRouter(s)
+
+	req := adminSettingsRequest(httptest.NewRequest("POST", "/api/admin/settings/database/test", nil))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("status: got %d, want %d; body: %s", w.Code, http.StatusOK, w.Body.String())
+	}
+
+	var resp map[string]any
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("decoding: %v", err)
+	}
+
+	if resp["success"] != true {
+		t.Errorf("expected success=true, got %v; message: %v", resp["success"], resp["message"])
+	}
+	if resp["latency_ms"] == nil {
+		t.Error("expected latency_ms in response")
+	}
+}
+
+func TestTestConnectivity_NotTestable(t *testing.T) {
+	s := newSettingsTestServer(t)
+	router := newSettingsRouter(s)
+
+	req := adminSettingsRequest(httptest.NewRequest("POST", "/api/admin/settings/core/test", nil))
+	w := httptest.NewRecorder()
+	router.ServeHTTP(w, req)
+
+	if w.Code != http.StatusBadRequest {
+		t.Errorf("status: got %d, want %d; body: %s", w.Code, http.StatusBadRequest, w.Body.String())
+	}
+}

internal/config/config.go

@@ -18,6 +18,25 @@ type Config struct {
 	Odoo     OdooConfig     `yaml:"odoo"`
 	Auth     AuthConfig     `yaml:"auth"`
 	Jobs     JobsConfig     `yaml:"jobs"`
+	Modules  ModulesConfig  `yaml:"modules"`
+}
+
+// ModulesConfig holds explicit enable/disable toggles for optional modules.
+// A nil pointer means "use the module's default state".
+type ModulesConfig struct {
+	Auth     *ModuleToggle `yaml:"auth"`
+	Projects *ModuleToggle `yaml:"projects"`
+	Audit    *ModuleToggle `yaml:"audit"`
+	Odoo     *ModuleToggle `yaml:"odoo"`
+	FreeCAD  *ModuleToggle `yaml:"freecad"`
+	Jobs     *ModuleToggle `yaml:"jobs"`
+	DAG      *ModuleToggle `yaml:"dag"`
+}
+
+// ModuleToggle holds an optional enabled flag. The pointer allows
+// distinguishing "not set" (nil) from "explicitly false".
+type ModuleToggle struct {
+	Enabled *bool `yaml:"enabled"`
 }
 
 // AuthConfig holds authentication and authorization settings.
@@ -90,14 +109,21 @@ type DatabaseConfig struct {
 	MaxConnections int    `yaml:"max_connections"`
 }
 
-// StorageConfig holds MinIO connection settings.
+// StorageConfig holds object storage settings.
 type StorageConfig struct {
-	Endpoint  string `yaml:"endpoint"`
-	AccessKey string `yaml:"access_key"`
-	SecretKey string `yaml:"secret_key"`
-	Bucket    string `yaml:"bucket"`
-	UseSSL    bool   `yaml:"use_ssl"`
-	Region    string `yaml:"region"`
+	Backend    string           `yaml:"backend"` // "minio" (default) or "filesystem"
+	Endpoint   string           `yaml:"endpoint"`
+	AccessKey  string           `yaml:"access_key"`
+	SecretKey  string           `yaml:"secret_key"`
+	Bucket     string           `yaml:"bucket"`
+	UseSSL     bool             `yaml:"use_ssl"`
+	Region     string           `yaml:"region"`
+	Filesystem FilesystemConfig `yaml:"filesystem"`
+}
+
+// FilesystemConfig holds local filesystem storage settings.
+type FilesystemConfig struct {
+	RootDir string `yaml:"root_dir"`
 }
 
 // SchemasConfig holds schema loading settings.

internal/db/item_dependencies.go

@@ -0,0 +1,127 @@
+package db
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+)
+
+// ItemDependency represents a row in the item_dependencies table.
+type ItemDependency struct {
+	ID              string
+	ParentItemID    string
+	ChildUUID       string
+	ChildPartNumber *string
+	ChildRevision   *int
+	Quantity        *float64
+	Label           *string
+	Relationship    string
+	RevisionNumber  int
+	CreatedAt       time.Time
+}
+
+// ResolvedDependency extends ItemDependency with resolution info from a LEFT JOIN.
+type ResolvedDependency struct {
+	ItemDependency
+	ResolvedPartNumber *string
+	ResolvedRevision   *int
+	Resolved           bool
+}
+
+// ItemDependencyRepository provides item_dependencies database operations.
+type ItemDependencyRepository struct {
+	db *DB
+}
+
+// NewItemDependencyRepository creates a new item dependency repository.
+func NewItemDependencyRepository(db *DB) *ItemDependencyRepository {
+	return &ItemDependencyRepository{db: db}
+}
+
+// ReplaceForRevision atomically replaces all dependencies for an item's revision.
+// Deletes existing rows for the parent item and inserts the new set.
+func (r *ItemDependencyRepository) ReplaceForRevision(ctx context.Context, parentItemID string, revisionNumber int, deps []*ItemDependency) error {
+	return r.db.Tx(ctx, func(tx pgx.Tx) error {
+		_, err := tx.Exec(ctx, `DELETE FROM item_dependencies WHERE parent_item_id = $1`, parentItemID)
+		if err != nil {
+			return fmt.Errorf("deleting old dependencies: %w", err)
+		}
+
+		for _, d := range deps {
+			_, err := tx.Exec(ctx, `
+				INSERT INTO item_dependencies
+					(parent_item_id, child_uuid, child_part_number, child_revision,
+					 quantity, label, relationship, revision_number)
+				VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
+			`, parentItemID, d.ChildUUID, d.ChildPartNumber, d.ChildRevision,
+				d.Quantity, d.Label, d.Relationship, revisionNumber)
+			if err != nil {
+				return fmt.Errorf("inserting dependency: %w", err)
+			}
+		}
+		return nil
+	})
+}
+
+// ListByItem returns all dependencies for an item.
+func (r *ItemDependencyRepository) ListByItem(ctx context.Context, parentItemID string) ([]*ItemDependency, error) {
+	rows, err := r.db.pool.Query(ctx, `
+		SELECT id, parent_item_id, child_uuid, child_part_number, child_revision,
+		       quantity, label, relationship, revision_number, created_at
+		FROM item_dependencies
+		WHERE parent_item_id = $1
+		ORDER BY label NULLS LAST
+	`, parentItemID)
+	if err != nil {
+		return nil, fmt.Errorf("listing dependencies: %w", err)
+	}
+	defer rows.Close()
+
+	var deps []*ItemDependency
+	for rows.Next() {
+		d := &ItemDependency{}
+		if err := rows.Scan(
+			&d.ID, &d.ParentItemID, &d.ChildUUID, &d.ChildPartNumber, &d.ChildRevision,
+			&d.Quantity, &d.Label, &d.Relationship, &d.RevisionNumber, &d.CreatedAt,
+		); err != nil {
+			return nil, fmt.Errorf("scanning dependency: %w", err)
+		}
+		deps = append(deps, d)
+	}
+	return deps, nil
+}
+
+// Resolve returns dependencies with child UUIDs resolved against the items table.
+// Unresolvable UUIDs (external or deleted items) have Resolved=false.
+func (r *ItemDependencyRepository) Resolve(ctx context.Context, parentItemID string) ([]*ResolvedDependency, error) {
+	rows, err := r.db.pool.Query(ctx, `
+		SELECT d.id, d.parent_item_id, d.child_uuid, d.child_part_number, d.child_revision,
+		       d.quantity, d.label, d.relationship, d.revision_number, d.created_at,
+		       i.part_number, i.current_revision
+		FROM item_dependencies d
+		LEFT JOIN items i ON i.id = d.child_uuid AND i.archived_at IS NULL
+		WHERE d.parent_item_id = $1
+		ORDER BY d.label NULLS LAST
+	`, parentItemID)
+	if err != nil {
+		return nil, fmt.Errorf("resolving dependencies: %w", err)
+	}
+	defer rows.Close()
+
+	var deps []*ResolvedDependency
+	for rows.Next() {
+		d := &ResolvedDependency{}
+		if err := rows.Scan(
+			&d.ID, &d.ParentItemID, &d.ChildUUID, &d.ChildPartNumber, &d.ChildRevision,
+			&d.Quantity, &d.Label, &d.Relationship, &d.RevisionNumber, &d.CreatedAt,
+			&d.ResolvedPartNumber, &d.ResolvedRevision,
+		); err != nil {
+			return nil, fmt.Errorf("scanning resolved dependency: %w", err)
+		}
+		d.Resolved = d.ResolvedPartNumber != nil
+		deps = append(deps, d)
+	}
+	return deps, nil
+}

internal/db/item_files.go

@@ -8,13 +8,14 @@ import (
 
 // ItemFile represents a file attachment on an item.
 type ItemFile struct {
-	ID          string
-	ItemID      string
-	Filename    string
-	ContentType string
-	Size        int64
-	ObjectKey   string
-	CreatedAt   time.Time
+	ID             string
+	ItemID         string
+	Filename       string
+	ContentType    string
+	Size           int64
+	ObjectKey      string
+	StorageBackend string // "minio" or "filesystem"
+	CreatedAt      time.Time
 }
 
 // ItemFileRepository provides item_files database operations.
@@ -29,11 +30,14 @@ func NewItemFileRepository(db *DB) *ItemFileRepository {
 
 // Create inserts a new item file record.
 func (r *ItemFileRepository) Create(ctx context.Context, f *ItemFile) error {
+	if f.StorageBackend == "" {
+		f.StorageBackend = "minio"
+	}
 	err := r.db.pool.QueryRow(ctx,
-		`INSERT INTO item_files (item_id, filename, content_type, size, object_key)
-		 VALUES ($1, $2, $3, $4, $5)
+		`INSERT INTO item_files (item_id, filename, content_type, size, object_key, storage_backend)
+		 VALUES ($1, $2, $3, $4, $5, $6)
 		 RETURNING id, created_at`,
-		f.ItemID, f.Filename, f.ContentType, f.Size, f.ObjectKey,
+		f.ItemID, f.Filename, f.ContentType, f.Size, f.ObjectKey, f.StorageBackend,
 	).Scan(&f.ID, &f.CreatedAt)
 	if err != nil {
 		return fmt.Errorf("creating item file: %w", err)
@@ -44,7 +48,8 @@ func (r *ItemFileRepository) Create(ctx context.Context, f *ItemFile) error {
 // ListByItem returns all file attachments for an item.
 func (r *ItemFileRepository) ListByItem(ctx context.Context, itemID string) ([]*ItemFile, error) {
 	rows, err := r.db.pool.Query(ctx,
-		`SELECT id, item_id, filename, content_type, size, object_key, created_at
+		`SELECT id, item_id, filename, content_type, size, object_key,
+		        COALESCE(storage_backend, 'minio'), created_at
 		 FROM item_files WHERE item_id = $1 ORDER BY created_at`,
 		itemID,
 	)
@@ -56,7 +61,7 @@ func (r *ItemFileRepository) ListByItem(ctx context.Context, itemID string) ([]*
 	var files []*ItemFile
 	for rows.Next() {
 		f := &ItemFile{}
-		if err := rows.Scan(&f.ID, &f.ItemID, &f.Filename, &f.ContentType, &f.Size, &f.ObjectKey, &f.CreatedAt); err != nil {
+		if err := rows.Scan(&f.ID, &f.ItemID, &f.Filename, &f.ContentType, &f.Size, &f.ObjectKey, &f.StorageBackend, &f.CreatedAt); err != nil {
 			return nil, fmt.Errorf("scanning item file: %w", err)
 		}
 		files = append(files, f)
@@ -68,10 +73,11 @@ func (r *ItemFileRepository) ListByItem(ctx context.Context, itemID string) ([]*
 func (r *ItemFileRepository) Get(ctx context.Context, id string) (*ItemFile, error) {
 	f := &ItemFile{}
 	err := r.db.pool.QueryRow(ctx,
-		`SELECT id, item_id, filename, content_type, size, object_key, created_at
+		`SELECT id, item_id, filename, content_type, size, object_key,
+		        COALESCE(storage_backend, 'minio'), created_at
 		 FROM item_files WHERE id = $1`,
 		id,
-	).Scan(&f.ID, &f.ItemID, &f.Filename, &f.ContentType, &f.Size, &f.ObjectKey, &f.CreatedAt)
+	).Scan(&f.ID, &f.ItemID, &f.Filename, &f.ContentType, &f.Size, &f.ObjectKey, &f.StorageBackend, &f.CreatedAt)
 	if err != nil {
 		return nil, fmt.Errorf("getting item file: %w", err)
 	}

internal/db/item_macros.go

@@ -0,0 +1,93 @@
+package db
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+)
+
+// ItemMacro represents a row in the item_macros table.
+type ItemMacro struct {
+	ID             string
+	ItemID         string
+	Filename       string
+	Trigger        string
+	Content        string
+	RevisionNumber int
+	CreatedAt      time.Time
+}
+
+// ItemMacroRepository provides item_macros database operations.
+type ItemMacroRepository struct {
+	db *DB
+}
+
+// NewItemMacroRepository creates a new item macro repository.
+func NewItemMacroRepository(db *DB) *ItemMacroRepository {
+	return &ItemMacroRepository{db: db}
+}
+
+// ReplaceForItem atomically replaces all macros for an item.
+// Deletes existing rows and inserts the new set.
+func (r *ItemMacroRepository) ReplaceForItem(ctx context.Context, itemID string, revisionNumber int, macros []*ItemMacro) error {
+	return r.db.Tx(ctx, func(tx pgx.Tx) error {
+		_, err := tx.Exec(ctx, `DELETE FROM item_macros WHERE item_id = $1`, itemID)
+		if err != nil {
+			return fmt.Errorf("deleting old macros: %w", err)
+		}
+
+		for _, m := range macros {
+			_, err := tx.Exec(ctx, `
+				INSERT INTO item_macros (item_id, filename, trigger, content, revision_number)
+				VALUES ($1, $2, $3, $4, $5)
+			`, itemID, m.Filename, m.Trigger, m.Content, revisionNumber)
+			if err != nil {
+				return fmt.Errorf("inserting macro %s: %w", m.Filename, err)
+			}
+		}
+		return nil
+	})
+}
+
+// ListByItem returns all macros for an item (without content), ordered by filename.
+func (r *ItemMacroRepository) ListByItem(ctx context.Context, itemID string) ([]*ItemMacro, error) {
+	rows, err := r.db.pool.Query(ctx, `
+		SELECT id, item_id, filename, trigger, revision_number, created_at
+		FROM item_macros
+		WHERE item_id = $1
+		ORDER BY filename
+	`, itemID)
+	if err != nil {
+		return nil, fmt.Errorf("listing macros: %w", err)
+	}
+	defer rows.Close()
+
+	var macros []*ItemMacro
+	for rows.Next() {
+		m := &ItemMacro{}
+		if err := rows.Scan(&m.ID, &m.ItemID, &m.Filename, &m.Trigger, &m.RevisionNumber, &m.CreatedAt); err != nil {
+			return nil, fmt.Errorf("scanning macro: %w", err)
+		}
+		macros = append(macros, m)
+	}
+	return macros, nil
+}
+
+// GetByFilename returns a single macro by item ID and filename, including content.
+func (r *ItemMacroRepository) GetByFilename(ctx context.Context, itemID string, filename string) (*ItemMacro, error) {
+	m := &ItemMacro{}
+	err := r.db.pool.QueryRow(ctx, `
+		SELECT id, item_id, filename, trigger, content, revision_number, created_at
+		FROM item_macros
+		WHERE item_id = $1 AND filename = $2
+	`, itemID, filename).Scan(&m.ID, &m.ItemID, &m.Filename, &m.Trigger, &m.Content, &m.RevisionNumber, &m.CreatedAt)
+	if err != nil {
+		if err == pgx.ErrNoRows {
+			return nil, nil
+		}
+		return nil, fmt.Errorf("getting macro: %w", err)
+	}
+	return m, nil
+}

internal/db/item_metadata.go

@@ -0,0 +1,161 @@
+package db
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+)
+
+// ItemMetadata represents a row in the item_metadata table.
+type ItemMetadata struct {
+	ItemID         string
+	SchemaName     *string
+	Tags           []string
+	LifecycleState string
+	Fields         map[string]any
+	KCVersion      *string
+	ManifestUUID   *string
+	SiloInstance   *string
+	RevisionHash   *string
+	UpdatedAt      time.Time
+	UpdatedBy      *string
+}
+
+// ItemMetadataRepository provides item_metadata database operations.
+type ItemMetadataRepository struct {
+	db *DB
+}
+
+// NewItemMetadataRepository creates a new item metadata repository.
+func NewItemMetadataRepository(db *DB) *ItemMetadataRepository {
+	return &ItemMetadataRepository{db: db}
+}
+
+// Get returns metadata for an item, or nil if none exists.
+func (r *ItemMetadataRepository) Get(ctx context.Context, itemID string) (*ItemMetadata, error) {
+	m := &ItemMetadata{}
+	var fieldsJSON []byte
+	err := r.db.pool.QueryRow(ctx, `
+		SELECT item_id, schema_name, tags, lifecycle_state, fields,
+		       kc_version, manifest_uuid, silo_instance, revision_hash,
+		       updated_at, updated_by
+		FROM item_metadata
+		WHERE item_id = $1
+	`, itemID).Scan(
+		&m.ItemID, &m.SchemaName, &m.Tags, &m.LifecycleState, &fieldsJSON,
+		&m.KCVersion, &m.ManifestUUID, &m.SiloInstance, &m.RevisionHash,
+		&m.UpdatedAt, &m.UpdatedBy,
+	)
+	if err == pgx.ErrNoRows {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, fmt.Errorf("getting item metadata: %w", err)
+	}
+	if fieldsJSON != nil {
+		if err := json.Unmarshal(fieldsJSON, &m.Fields); err != nil {
+			return nil, fmt.Errorf("unmarshaling fields: %w", err)
+		}
+	}
+	if m.Fields == nil {
+		m.Fields = make(map[string]any)
+	}
+	if m.Tags == nil {
+		m.Tags = []string{}
+	}
+	return m, nil
+}
+
+// Upsert inserts or updates the metadata row for an item.
+// Used by the commit extraction pipeline.
+func (r *ItemMetadataRepository) Upsert(ctx context.Context, m *ItemMetadata) error {
+	fieldsJSON, err := json.Marshal(m.Fields)
+	if err != nil {
+		return fmt.Errorf("marshaling fields: %w", err)
+	}
+	_, err = r.db.pool.Exec(ctx, `
+		INSERT INTO item_metadata
+			(item_id, schema_name, tags, lifecycle_state, fields,
+			 kc_version, manifest_uuid, silo_instance, revision_hash,
+			 updated_at, updated_by)
+		VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, now(), $10)
+		ON CONFLICT (item_id) DO UPDATE SET
+			schema_name     = EXCLUDED.schema_name,
+			tags            = EXCLUDED.tags,
+			lifecycle_state = EXCLUDED.lifecycle_state,
+			fields          = EXCLUDED.fields,
+			kc_version      = EXCLUDED.kc_version,
+			manifest_uuid   = EXCLUDED.manifest_uuid,
+			silo_instance   = EXCLUDED.silo_instance,
+			revision_hash   = EXCLUDED.revision_hash,
+			updated_at      = now(),
+			updated_by      = EXCLUDED.updated_by
+	`, m.ItemID, m.SchemaName, m.Tags, m.LifecycleState, fieldsJSON,
+		m.KCVersion, m.ManifestUUID, m.SiloInstance, m.RevisionHash,
+		m.UpdatedBy)
+	if err != nil {
+		return fmt.Errorf("upserting item metadata: %w", err)
+	}
+	return nil
+}
+
+// UpdateFields merges the given fields into the existing JSONB fields column.
+func (r *ItemMetadataRepository) UpdateFields(ctx context.Context, itemID string, fields map[string]any, updatedBy string) error {
+	fieldsJSON, err := json.Marshal(fields)
+	if err != nil {
+		return fmt.Errorf("marshaling fields: %w", err)
+	}
+	tag, err := r.db.pool.Exec(ctx, `
+		UPDATE item_metadata
+		SET fields     = fields || $2::jsonb,
+		    updated_at = now(),
+		    updated_by = $3
+		WHERE item_id = $1
+	`, itemID, fieldsJSON, updatedBy)
+	if err != nil {
+		return fmt.Errorf("updating metadata fields: %w", err)
+	}
+	if tag.RowsAffected() == 0 {
+		return fmt.Errorf("item metadata not found")
+	}
+	return nil
+}
+
+// UpdateLifecycle sets the lifecycle_state column.
+func (r *ItemMetadataRepository) UpdateLifecycle(ctx context.Context, itemID, state, updatedBy string) error {
+	tag, err := r.db.pool.Exec(ctx, `
+		UPDATE item_metadata
+		SET lifecycle_state = $2,
+		    updated_at      = now(),
+		    updated_by      = $3
+		WHERE item_id = $1
+	`, itemID, state, updatedBy)
+	if err != nil {
+		return fmt.Errorf("updating lifecycle state: %w", err)
+	}
+	if tag.RowsAffected() == 0 {
+		return fmt.Errorf("item metadata not found")
+	}
+	return nil
+}
+
+// SetTags replaces the tags array.
+func (r *ItemMetadataRepository) SetTags(ctx context.Context, itemID string, tags []string, updatedBy string) error {
+	tag, err := r.db.pool.Exec(ctx, `
+		UPDATE item_metadata
+		SET tags       = $2,
+		    updated_at = now(),
+		    updated_by = $3
+		WHERE item_id = $1
+	`, itemID, tags, updatedBy)
+	if err != nil {
+		return fmt.Errorf("updating tags: %w", err)
+	}
+	if tag.RowsAffected() == 0 {
+		return fmt.Errorf("item metadata not found")
+	}
+	return nil
+}

internal/db/items.go

@@ -35,11 +35,12 @@ type Revision struct {
 	ItemID         string
 	RevisionNumber int
 	Properties     map[string]any
-	FileKey        *string
-	FileVersion    *string
-	FileChecksum   *string
-	FileSize       *int64
-	ThumbnailKey   *string
+	FileKey            *string
+	FileVersion        *string
+	FileChecksum       *string
+	FileSize           *int64
+	FileStorageBackend string // "minio" or "filesystem"
+	ThumbnailKey       *string
 	CreatedAt      time.Time
 	CreatedBy      *string
 	Comment        *string
@@ -306,16 +307,20 @@ func (r *ItemRepository) CreateRevision(ctx context.Context, rev *Revision) erro
 		return fmt.Errorf("marshaling properties: %w", err)
 	}
 
+	if rev.FileStorageBackend == "" {
+		rev.FileStorageBackend = "minio"
+	}
+
 	err = r.db.pool.QueryRow(ctx, `
 		INSERT INTO revisions (
 			item_id, revision_number, properties, file_key, file_version,
-			file_checksum, file_size, thumbnail_key, created_by, comment
+			file_checksum, file_size, file_storage_backend, thumbnail_key, created_by, comment
 		)
-		SELECT $1, current_revision + 1, $2, $3, $4, $5, $6, $7, $8, $9
+		SELECT $1, current_revision + 1, $2, $3, $4, $5, $6, $7, $8, $9, $10
 		FROM items WHERE id = $1
 		RETURNING id, revision_number, created_at
 	`, rev.ItemID, propsJSON, rev.FileKey, rev.FileVersion,
-		rev.FileChecksum, rev.FileSize, rev.ThumbnailKey, rev.CreatedBy, rev.Comment,
+		rev.FileChecksum, rev.FileSize, rev.FileStorageBackend, rev.ThumbnailKey, rev.CreatedBy, rev.Comment,
 	).Scan(&rev.ID, &rev.RevisionNumber, &rev.CreatedAt)
 	if err != nil {
 		return fmt.Errorf("inserting revision: %w", err)
@@ -342,7 +347,8 @@ func (r *ItemRepository) GetRevisions(ctx context.Context, itemID string) ([]*Re
 	if hasStatusColumn {
 		rows, err = r.db.pool.Query(ctx, `
 			SELECT id, item_id, revision_number, properties, file_key, file_version,
-			       file_checksum, file_size, thumbnail_key, created_at, created_by, comment,
+			       file_checksum, file_size, COALESCE(file_storage_backend, 'minio'),
+			       thumbnail_key, created_at, created_by, comment,
 			       COALESCE(status, 'draft') as status, COALESCE(labels, ARRAY[]::TEXT[]) as labels
 			FROM revisions
 			WHERE item_id = $1
@@ -369,7 +375,8 @@ func (r *ItemRepository) GetRevisions(ctx context.Context, itemID string) ([]*Re
 		if hasStatusColumn {
 			err = rows.Scan(
 				&rev.ID, &rev.ItemID, &rev.RevisionNumber, &propsJSON, &rev.FileKey, &rev.FileVersion,
-				&rev.FileChecksum, &rev.FileSize, &rev.ThumbnailKey, &rev.CreatedAt, &rev.CreatedBy, &rev.Comment,
+				&rev.FileChecksum, &rev.FileSize, &rev.FileStorageBackend,
+				&rev.ThumbnailKey, &rev.CreatedAt, &rev.CreatedBy, &rev.Comment,
 				&rev.Status, &rev.Labels,
 			)
 		} else {
@@ -379,6 +386,7 @@ func (r *ItemRepository) GetRevisions(ctx context.Context, itemID string) ([]*Re
 			)
 			rev.Status = "draft"
 			rev.Labels = []string{}
+			rev.FileStorageBackend = "minio"
 		}
 		if err != nil {
 			return nil, fmt.Errorf("scanning revision: %w", err)
@@ -412,13 +420,15 @@ func (r *ItemRepository) GetRevision(ctx context.Context, itemID string, revisio
 	if hasStatusColumn {
 		err = r.db.pool.QueryRow(ctx, `
 			SELECT id, item_id, revision_number, properties, file_key, file_version,
-			       file_checksum, file_size, thumbnail_key, created_at, created_by, comment,
+			       file_checksum, file_size, COALESCE(file_storage_backend, 'minio'),
+			       thumbnail_key, created_at, created_by, comment,
 			       COALESCE(status, 'draft') as status, COALESCE(labels, ARRAY[]::TEXT[]) as labels
 			FROM revisions
 			WHERE item_id = $1 AND revision_number = $2
 		`, itemID, revisionNumber).Scan(
 			&rev.ID, &rev.ItemID, &rev.RevisionNumber, &propsJSON, &rev.FileKey, &rev.FileVersion,
-			&rev.FileChecksum, &rev.FileSize, &rev.ThumbnailKey, &rev.CreatedAt, &rev.CreatedBy, &rev.Comment,
+			&rev.FileChecksum, &rev.FileSize, &rev.FileStorageBackend,
+			&rev.ThumbnailKey, &rev.CreatedAt, &rev.CreatedBy, &rev.Comment,
 			&rev.Status, &rev.Labels,
 		)
 	} else {
@@ -433,6 +443,7 @@ func (r *ItemRepository) GetRevision(ctx context.Context, itemID string, revisio
 		)
 		rev.Status = "draft"
 		rev.Labels = []string{}
+		rev.FileStorageBackend = "minio"
 	}
 
 	if err == pgx.ErrNoRows {
@@ -606,15 +617,16 @@ func (r *ItemRepository) CreateRevisionFromExisting(ctx context.Context, itemID
 
 	// Create new revision with copied properties (and optionally file reference)
 	newRev := &Revision{
-		ItemID:       itemID,
-		Properties:   source.Properties,
-		FileKey:      source.FileKey,
-		FileVersion:  source.FileVersion,
-		FileChecksum: source.FileChecksum,
-		FileSize:     source.FileSize,
-		ThumbnailKey: source.ThumbnailKey,
-		CreatedBy:    createdBy,
-		Comment:      &comment,
+		ItemID:             itemID,
+		Properties:         source.Properties,
+		FileKey:            source.FileKey,
+		FileVersion:        source.FileVersion,
+		FileChecksum:       source.FileChecksum,
+		FileSize:           source.FileSize,
+		FileStorageBackend: source.FileStorageBackend,
+		ThumbnailKey:       source.ThumbnailKey,
+		CreatedBy:          createdBy,
+		Comment:            &comment,
 	}
 
 	// Insert the new revision
@@ -626,13 +638,13 @@ func (r *ItemRepository) CreateRevisionFromExisting(ctx context.Context, itemID
 	err = r.db.pool.QueryRow(ctx, `
 		INSERT INTO revisions (
 			item_id, revision_number, properties, file_key, file_version,
-			file_checksum, file_size, thumbnail_key, created_by, comment, status
+			file_checksum, file_size, file_storage_backend, thumbnail_key, created_by, comment, status
 		)
-		SELECT $1, current_revision + 1, $2, $3, $4, $5, $6, $7, $8, $9, 'draft'
+		SELECT $1, current_revision + 1, $2, $3, $4, $5, $6, $7, $8, $9, $10, 'draft'
 		FROM items WHERE id = $1
 		RETURNING id, revision_number, created_at
 	`, newRev.ItemID, propsJSON, newRev.FileKey, newRev.FileVersion,
-		newRev.FileChecksum, newRev.FileSize, newRev.ThumbnailKey, newRev.CreatedBy, newRev.Comment,
+		newRev.FileChecksum, newRev.FileSize, newRev.FileStorageBackend, newRev.ThumbnailKey, newRev.CreatedBy, newRev.Comment,
 	).Scan(&newRev.ID, &newRev.RevisionNumber, &newRev.CreatedAt)
 	if err != nil {
 		return nil, fmt.Errorf("inserting revision: %w", err)

internal/db/locations.go

@@ -0,0 +1,230 @@
+package db
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/jackc/pgx/v5"
+)
+
+// Location represents a location in the hierarchy.
+type Location struct {
+	ID           string
+	Path         string
+	Name         string
+	ParentID     *string
+	LocationType string
+	Depth        int
+	Metadata     map[string]any
+	CreatedAt    time.Time
+}
+
+// LocationRepository provides location database operations.
+type LocationRepository struct {
+	db *DB
+}
+
+// NewLocationRepository creates a new location repository.
+func NewLocationRepository(db *DB) *LocationRepository {
+	return &LocationRepository{db: db}
+}
+
+// List returns all locations ordered by path.
+func (r *LocationRepository) List(ctx context.Context) ([]*Location, error) {
+	rows, err := r.db.pool.Query(ctx, `
+		SELECT id, path, name, parent_id, location_type, depth, metadata, created_at
+		FROM locations
+		ORDER BY path
+	`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	return scanLocations(rows)
+}
+
+// GetByPath returns a location by its path.
+func (r *LocationRepository) GetByPath(ctx context.Context, path string) (*Location, error) {
+	loc := &Location{}
+	var meta []byte
+	err := r.db.pool.QueryRow(ctx, `
+		SELECT id, path, name, parent_id, location_type, depth, metadata, created_at
+		FROM locations
+		WHERE path = $1
+	`, path).Scan(&loc.ID, &loc.Path, &loc.Name, &loc.ParentID, &loc.LocationType, &loc.Depth, &meta, &loc.CreatedAt)
+	if err == pgx.ErrNoRows {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	if meta != nil {
+		json.Unmarshal(meta, &loc.Metadata)
+	}
+	return loc, nil
+}
+
+// GetByID returns a location by its ID.
+func (r *LocationRepository) GetByID(ctx context.Context, id string) (*Location, error) {
+	loc := &Location{}
+	var meta []byte
+	err := r.db.pool.QueryRow(ctx, `
+		SELECT id, path, name, parent_id, location_type, depth, metadata, created_at
+		FROM locations
+		WHERE id = $1
+	`, id).Scan(&loc.ID, &loc.Path, &loc.Name, &loc.ParentID, &loc.LocationType, &loc.Depth, &meta, &loc.CreatedAt)
+	if err == pgx.ErrNoRows {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	if meta != nil {
+		json.Unmarshal(meta, &loc.Metadata)
+	}
+	return loc, nil
+}
+
+// GetChildren returns direct children of a location.
+func (r *LocationRepository) GetChildren(ctx context.Context, parentID string) ([]*Location, error) {
+	rows, err := r.db.pool.Query(ctx, `
+		SELECT id, path, name, parent_id, location_type, depth, metadata, created_at
+		FROM locations
+		WHERE parent_id = $1
+		ORDER BY path
+	`, parentID)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	return scanLocations(rows)
+}
+
+// GetTree returns a location and all its descendants (by path prefix).
+func (r *LocationRepository) GetTree(ctx context.Context, rootPath string) ([]*Location, error) {
+	rows, err := r.db.pool.Query(ctx, `
+		SELECT id, path, name, parent_id, location_type, depth, metadata, created_at
+		FROM locations
+		WHERE path = $1 OR path LIKE $2
+		ORDER BY path
+	`, rootPath, rootPath+"/%")
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	return scanLocations(rows)
+}
+
+// Create inserts a new location. ParentID and Depth are resolved from the path.
+func (r *LocationRepository) Create(ctx context.Context, loc *Location) error {
+	// Auto-calculate depth from path segments
+	loc.Depth = strings.Count(loc.Path, "/")
+
+	// Resolve parent_id from path if not explicitly set
+	if loc.ParentID == nil && loc.Depth > 0 {
+		parentPath := loc.Path[:strings.LastIndex(loc.Path, "/")]
+		parent, err := r.GetByPath(ctx, parentPath)
+		if err != nil {
+			return fmt.Errorf("looking up parent %q: %w", parentPath, err)
+		}
+		if parent == nil {
+			return fmt.Errorf("parent location %q does not exist", parentPath)
+		}
+		loc.ParentID = &parent.ID
+	}
+
+	meta, err := json.Marshal(loc.Metadata)
+	if err != nil {
+		return fmt.Errorf("marshaling metadata: %w", err)
+	}
+
+	return r.db.pool.QueryRow(ctx, `
+		INSERT INTO locations (path, name, parent_id, location_type, depth, metadata)
+		VALUES ($1, $2, $3, $4, $5, $6)
+		RETURNING id, created_at
+	`, loc.Path, loc.Name, loc.ParentID, loc.LocationType, loc.Depth, meta).Scan(&loc.ID, &loc.CreatedAt)
+}
+
+// Update updates a location's name, type, and metadata.
+func (r *LocationRepository) Update(ctx context.Context, path string, name, locationType string, metadata map[string]any) error {
+	meta, err := json.Marshal(metadata)
+	if err != nil {
+		return fmt.Errorf("marshaling metadata: %w", err)
+	}
+	tag, err := r.db.pool.Exec(ctx, `
+		UPDATE locations
+		SET name = $2, location_type = $3, metadata = $4
+		WHERE path = $1
+	`, path, name, locationType, meta)
+	if err != nil {
+		return err
+	}
+	if tag.RowsAffected() == 0 {
+		return fmt.Errorf("location %q not found", path)
+	}
+	return nil
+}
+
+// Delete removes a location. Returns an error if inventory rows reference it.
+func (r *LocationRepository) Delete(ctx context.Context, path string) error {
+	// Check for inventory references
+	var count int
+	err := r.db.pool.QueryRow(ctx, `
+		SELECT COUNT(*) FROM inventory
+		WHERE location_id = (SELECT id FROM locations WHERE path = $1)
+	`, path).Scan(&count)
+	if err != nil {
+		return err
+	}
+	if count > 0 {
+		return fmt.Errorf("cannot delete location %q: %d inventory record(s) exist", path, count)
+	}
+
+	// Delete children first (cascade by path prefix), deepest first
+	_, err = r.db.pool.Exec(ctx, `
+		DELETE FROM locations
+		WHERE path LIKE $1
+	`, path+"/%")
+	if err != nil {
+		return err
+	}
+
+	tag, err := r.db.pool.Exec(ctx, `DELETE FROM locations WHERE path = $1`, path)
+	if err != nil {
+		return err
+	}
+	if tag.RowsAffected() == 0 {
+		return fmt.Errorf("location %q not found", path)
+	}
+	return nil
+}
+
+// HasInventory checks if a location (or descendants) have inventory records.
+func (r *LocationRepository) HasInventory(ctx context.Context, path string) (bool, error) {
+	var count int
+	err := r.db.pool.QueryRow(ctx, `
+		SELECT COUNT(*) FROM inventory i
+		JOIN locations l ON l.id = i.location_id
+		WHERE l.path = $1 OR l.path LIKE $2
+	`, path, path+"/%").Scan(&count)
+	return count > 0, err
+}
+
+func scanLocations(rows pgx.Rows) ([]*Location, error) {
+	var locs []*Location
+	for rows.Next() {
+		loc := &Location{}
+		var meta []byte
+		if err := rows.Scan(&loc.ID, &loc.Path, &loc.Name, &loc.ParentID, &loc.LocationType, &loc.Depth, &meta, &loc.CreatedAt); err != nil {
+			return nil, err
+		}
+		if meta != nil {
+			json.Unmarshal(meta, &loc.Metadata)
+		}
+		locs = append(locs, loc)
+	}
+	return locs, rows.Err()
+}

internal/db/settings.go

@@ -0,0 +1,105 @@
+package db
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+)
+
+// SettingsRepository provides access to module_state and settings_overrides tables.
+type SettingsRepository struct {
+	db *DB
+}
+
+// NewSettingsRepository creates a new SettingsRepository.
+func NewSettingsRepository(db *DB) *SettingsRepository {
+	return &SettingsRepository{db: db}
+}
+
+// GetModuleStates returns all module enabled/disabled states from the database.
+func (r *SettingsRepository) GetModuleStates(ctx context.Context) (map[string]bool, error) {
+	rows, err := r.db.pool.Query(ctx,
+		`SELECT module_id, enabled FROM module_state`)
+	if err != nil {
+		return nil, fmt.Errorf("querying module states: %w", err)
+	}
+	defer rows.Close()
+
+	states := make(map[string]bool)
+	for rows.Next() {
+		var id string
+		var enabled bool
+		if err := rows.Scan(&id, &enabled); err != nil {
+			return nil, fmt.Errorf("scanning module state: %w", err)
+		}
+		states[id] = enabled
+	}
+	return states, rows.Err()
+}
+
+// SetModuleState persists a module's enabled state. Uses upsert semantics.
+func (r *SettingsRepository) SetModuleState(ctx context.Context, moduleID string, enabled bool, updatedBy string) error {
+	_, err := r.db.pool.Exec(ctx,
+		`INSERT INTO module_state (module_id, enabled, updated_by, updated_at)
+		 VALUES ($1, $2, $3, now())
+		 ON CONFLICT (module_id) DO UPDATE
+		 SET enabled = EXCLUDED.enabled,
+		     updated_by = EXCLUDED.updated_by,
+		     updated_at = now()`,
+		moduleID, enabled, updatedBy)
+	if err != nil {
+		return fmt.Errorf("setting module state: %w", err)
+	}
+	return nil
+}
+
+// GetOverrides returns all settings overrides from the database.
+func (r *SettingsRepository) GetOverrides(ctx context.Context) (map[string]json.RawMessage, error) {
+	rows, err := r.db.pool.Query(ctx,
+		`SELECT key, value FROM settings_overrides`)
+	if err != nil {
+		return nil, fmt.Errorf("querying settings overrides: %w", err)
+	}
+	defer rows.Close()
+
+	overrides := make(map[string]json.RawMessage)
+	for rows.Next() {
+		var key string
+		var value json.RawMessage
+		if err := rows.Scan(&key, &value); err != nil {
+			return nil, fmt.Errorf("scanning settings override: %w", err)
+		}
+		overrides[key] = value
+	}
+	return overrides, rows.Err()
+}
+
+// SetOverride persists a settings override. Uses upsert semantics.
+func (r *SettingsRepository) SetOverride(ctx context.Context, key string, value any, updatedBy string) error {
+	jsonVal, err := json.Marshal(value)
+	if err != nil {
+		return fmt.Errorf("marshaling override value: %w", err)
+	}
+	_, err = r.db.pool.Exec(ctx,
+		`INSERT INTO settings_overrides (key, value, updated_by, updated_at)
+		 VALUES ($1, $2, $3, now())
+		 ON CONFLICT (key) DO UPDATE
+		 SET value = EXCLUDED.value,
+		     updated_by = EXCLUDED.updated_by,
+		     updated_at = now()`,
+		key, jsonVal, updatedBy)
+	if err != nil {
+		return fmt.Errorf("setting override: %w", err)
+	}
+	return nil
+}
+
+// DeleteOverride removes a settings override.
+func (r *SettingsRepository) DeleteOverride(ctx context.Context, key string) error {
+	_, err := r.db.pool.Exec(ctx,
+		`DELETE FROM settings_overrides WHERE key = $1`, key)
+	if err != nil {
+		return fmt.Errorf("deleting override: %w", err)
+	}
+	return nil
+}

internal/kc/kc.go

@@ -0,0 +1,179 @@
+// Package kc extracts and parses the silo/ metadata directory from .kc files.
+//
+// A .kc file is a ZIP archive (superset of .fcstd) that contains a silo/
+// directory with JSON metadata entries. This package handles extraction and
+// packing — no database or HTTP dependencies.
+package kc
+
+import (
+	"archive/zip"
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"strings"
+)
+
+// Manifest represents the contents of silo/manifest.json.
+type Manifest struct {
+	UUID         string `json:"uuid"`
+	KCVersion    string `json:"kc_version"`
+	RevisionHash string `json:"revision_hash"`
+	SiloInstance string `json:"silo_instance"`
+}
+
+// Metadata represents the contents of silo/metadata.json.
+type Metadata struct {
+	SchemaName     string         `json:"schema_name"`
+	Tags           []string       `json:"tags"`
+	LifecycleState string         `json:"lifecycle_state"`
+	Fields         map[string]any `json:"fields"`
+}
+
+// Dependency represents one entry in silo/dependencies.json.
+type Dependency struct {
+	UUID         string  `json:"uuid"`
+	PartNumber   string  `json:"part_number"`
+	Revision     int     `json:"revision"`
+	Quantity     float64 `json:"quantity"`
+	Label        string  `json:"label"`
+	Relationship string  `json:"relationship"`
+}
+
+// MacroFile represents a script file found under silo/macros/.
+type MacroFile struct {
+	Filename string
+	Content  string
+}
+
+// ExtractResult holds the parsed silo/ directory contents from a .kc file.
+type ExtractResult struct {
+	Manifest     *Manifest
+	Metadata     *Metadata
+	Dependencies []Dependency
+	Macros       []MacroFile
+}
+
+// HistoryEntry represents one entry in silo/history.json.
+type HistoryEntry struct {
+	RevisionNumber int      `json:"revision_number"`
+	CreatedAt      string   `json:"created_at"`
+	CreatedBy      *string  `json:"created_by,omitempty"`
+	Comment        *string  `json:"comment,omitempty"`
+	Status         string   `json:"status"`
+	Labels         []string `json:"labels"`
+}
+
+// PackInput holds all the data needed to repack silo/ entries in a .kc file.
+// Each field is optional — nil/empty means the entry is omitted from the ZIP.
+type PackInput struct {
+	Manifest     *Manifest
+	Metadata     *Metadata
+	History      []HistoryEntry
+	Dependencies []Dependency
+}
+
+// Extract opens a ZIP archive from data and parses the silo/ directory.
+// Returns nil, nil if no silo/ directory is found (plain .fcstd file).
+// Returns nil, error if silo/ entries exist but fail to parse.
+func Extract(data []byte) (*ExtractResult, error) {
+	r, err := zip.NewReader(bytes.NewReader(data), int64(len(data)))
+	if err != nil {
+		return nil, fmt.Errorf("kc: open zip: %w", err)
+	}
+
+	var manifestFile, metadataFile, dependenciesFile *zip.File
+	var macroFiles []*zip.File
+	hasSiloDir := false
+
+	for _, f := range r.File {
+		if f.Name == "silo/" || strings.HasPrefix(f.Name, "silo/") {
+			hasSiloDir = true
+		}
+		switch f.Name {
+		case "silo/manifest.json":
+			manifestFile = f
+		case "silo/metadata.json":
+			metadataFile = f
+		case "silo/dependencies.json":
+			dependenciesFile = f
+		default:
+			if strings.HasPrefix(f.Name, "silo/macros/") && !f.FileInfo().IsDir() {
+				name := strings.TrimPrefix(f.Name, "silo/macros/")
+				if name != "" {
+					macroFiles = append(macroFiles, f)
+				}
+			}
+		}
+	}
+
+	if !hasSiloDir {
+		return nil, nil // plain .fcstd, no extraction
+	}
+
+	result := &ExtractResult{}
+
+	if manifestFile != nil {
+		m, err := readJSON[Manifest](manifestFile)
+		if err != nil {
+			return nil, fmt.Errorf("kc: parse manifest.json: %w", err)
+		}
+		result.Manifest = m
+	}
+
+	if metadataFile != nil {
+		m, err := readJSON[Metadata](metadataFile)
+		if err != nil {
+			return nil, fmt.Errorf("kc: parse metadata.json: %w", err)
+		}
+		result.Metadata = m
+	}
+
+	if dependenciesFile != nil {
+		deps, err := readJSON[[]Dependency](dependenciesFile)
+		if err != nil {
+			return nil, fmt.Errorf("kc: parse dependencies.json: %w", err)
+		}
+		if deps != nil {
+			result.Dependencies = *deps
+		}
+	}
+
+	for _, mf := range macroFiles {
+		rc, err := mf.Open()
+		if err != nil {
+			return nil, fmt.Errorf("kc: open macro %s: %w", mf.Name, err)
+		}
+		content, err := io.ReadAll(rc)
+		rc.Close()
+		if err != nil {
+			return nil, fmt.Errorf("kc: read macro %s: %w", mf.Name, err)
+		}
+		result.Macros = append(result.Macros, MacroFile{
+			Filename: strings.TrimPrefix(mf.Name, "silo/macros/"),
+			Content:  string(content),
+		})
+	}
+
+	return result, nil
+}
+
+// readJSON opens a zip.File and decodes its contents as JSON into T.
+func readJSON[T any](f *zip.File) (*T, error) {
+	rc, err := f.Open()
+	if err != nil {
+		return nil, err
+	}
+	defer rc.Close()
+
+	data, err := io.ReadAll(rc)
+	if err != nil {
+		return nil, err
+	}
+
+	var v T
+	if err := json.Unmarshal(data, &v); err != nil {
+		return nil, err
+	}
+	return &v, nil
+}

internal/kc/kc_test.go

@@ -0,0 +1,188 @@
+package kc
+
+import (
+	"archive/zip"
+	"bytes"
+	"encoding/json"
+	"testing"
+)
+
+// buildZip creates a ZIP archive in memory from a map of filename → content.
+func buildZip(t *testing.T, files map[string][]byte) []byte {
+	t.Helper()
+	var buf bytes.Buffer
+	w := zip.NewWriter(&buf)
+	for name, content := range files {
+		f, err := w.Create(name)
+		if err != nil {
+			t.Fatalf("creating zip entry %s: %v", name, err)
+		}
+		if _, err := f.Write(content); err != nil {
+			t.Fatalf("writing zip entry %s: %v", name, err)
+		}
+	}
+	if err := w.Close(); err != nil {
+		t.Fatalf("closing zip: %v", err)
+	}
+	return buf.Bytes()
+}
+
+func mustJSON(t *testing.T, v any) []byte {
+	t.Helper()
+	data, err := json.Marshal(v)
+	if err != nil {
+		t.Fatalf("marshaling JSON: %v", err)
+	}
+	return data
+}
+
+func TestExtract_PlainFCStd(t *testing.T) {
+	data := buildZip(t, map[string][]byte{
+		"Document.xml":     []byte("<xml/>"),
+		"thumbnails/a.png": []byte("png"),
+	})
+
+	result, err := Extract(data)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if result != nil {
+		t.Fatalf("expected nil result for plain .fcstd, got %+v", result)
+	}
+}
+
+func TestExtract_ValidKC(t *testing.T) {
+	manifest := Manifest{
+		UUID:         "550e8400-e29b-41d4-a716-446655440000",
+		KCVersion:    "1.0",
+		RevisionHash: "abc123",
+		SiloInstance: "https://silo.example.com",
+	}
+	metadata := Metadata{
+		SchemaName:     "mechanical-part-v2",
+		Tags:           []string{"structural", "aluminum"},
+		LifecycleState: "draft",
+		Fields: map[string]any{
+			"material":  "6061-T6",
+			"weight_kg": 0.34,
+		},
+	}
+
+	data := buildZip(t, map[string][]byte{
+		"Document.xml":       []byte("<xml/>"),
+		"silo/manifest.json": mustJSON(t, manifest),
+		"silo/metadata.json": mustJSON(t, metadata),
+	})
+
+	result, err := Extract(data)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if result == nil {
+		t.Fatal("expected non-nil result")
+	}
+
+	if result.Manifest == nil {
+		t.Fatal("expected manifest")
+	}
+	if result.Manifest.UUID != manifest.UUID {
+		t.Errorf("manifest UUID = %q, want %q", result.Manifest.UUID, manifest.UUID)
+	}
+	if result.Manifest.KCVersion != manifest.KCVersion {
+		t.Errorf("manifest KCVersion = %q, want %q", result.Manifest.KCVersion, manifest.KCVersion)
+	}
+	if result.Manifest.RevisionHash != manifest.RevisionHash {
+		t.Errorf("manifest RevisionHash = %q, want %q", result.Manifest.RevisionHash, manifest.RevisionHash)
+	}
+	if result.Manifest.SiloInstance != manifest.SiloInstance {
+		t.Errorf("manifest SiloInstance = %q, want %q", result.Manifest.SiloInstance, manifest.SiloInstance)
+	}
+
+	if result.Metadata == nil {
+		t.Fatal("expected metadata")
+	}
+	if result.Metadata.SchemaName != metadata.SchemaName {
+		t.Errorf("metadata SchemaName = %q, want %q", result.Metadata.SchemaName, metadata.SchemaName)
+	}
+	if result.Metadata.LifecycleState != metadata.LifecycleState {
+		t.Errorf("metadata LifecycleState = %q, want %q", result.Metadata.LifecycleState, metadata.LifecycleState)
+	}
+	if len(result.Metadata.Tags) != 2 {
+		t.Errorf("metadata Tags len = %d, want 2", len(result.Metadata.Tags))
+	}
+	if result.Metadata.Fields["material"] != "6061-T6" {
+		t.Errorf("metadata Fields[material] = %v, want 6061-T6", result.Metadata.Fields["material"])
+	}
+}
+
+func TestExtract_ManifestOnly(t *testing.T) {
+	manifest := Manifest{
+		UUID:      "550e8400-e29b-41d4-a716-446655440000",
+		KCVersion: "1.0",
+	}
+
+	data := buildZip(t, map[string][]byte{
+		"Document.xml":       []byte("<xml/>"),
+		"silo/manifest.json": mustJSON(t, manifest),
+	})
+
+	result, err := Extract(data)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if result == nil {
+		t.Fatal("expected non-nil result")
+	}
+	if result.Manifest == nil {
+		t.Fatal("expected manifest")
+	}
+	if result.Metadata != nil {
+		t.Errorf("expected nil metadata, got %+v", result.Metadata)
+	}
+}
+
+func TestExtract_InvalidJSON(t *testing.T) {
+	data := buildZip(t, map[string][]byte{
+		"silo/manifest.json": []byte("{not valid json"),
+	})
+
+	result, err := Extract(data)
+	if err == nil {
+		t.Fatal("expected error for invalid JSON")
+	}
+	if result != nil {
+		t.Errorf("expected nil result on error, got %+v", result)
+	}
+}
+
+func TestExtract_NotAZip(t *testing.T) {
+	result, err := Extract([]byte("this is not a zip file"))
+	if err == nil {
+		t.Fatal("expected error for non-ZIP data")
+	}
+	if result != nil {
+		t.Errorf("expected nil result on error, got %+v", result)
+	}
+}
+
+func TestExtract_EmptySiloDir(t *testing.T) {
+	// silo/ directory entry exists but no manifest or metadata files
+	data := buildZip(t, map[string][]byte{
+		"Document.xml": []byte("<xml/>"),
+		"silo/":        {},
+	})
+
+	result, err := Extract(data)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if result == nil {
+		t.Fatal("expected non-nil result for silo/ dir")
+	}
+	if result.Manifest != nil {
+		t.Errorf("expected nil manifest, got %+v", result.Manifest)
+	}
+	if result.Metadata != nil {
+		t.Errorf("expected nil metadata, got %+v", result.Metadata)
+	}
+}

internal/kc/pack.go

@@ -0,0 +1,131 @@
+package kc
+
+import (
+	"archive/zip"
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"strings"
+)
+
+// HasSiloDir opens a ZIP archive and returns true if any entry starts with "silo/".
+// This is a lightweight check used to short-circuit before gathering DB data.
+func HasSiloDir(data []byte) (bool, error) {
+	r, err := zip.NewReader(bytes.NewReader(data), int64(len(data)))
+	if err != nil {
+		return false, fmt.Errorf("kc: open zip: %w", err)
+	}
+	for _, f := range r.File {
+		if f.Name == "silo/" || strings.HasPrefix(f.Name, "silo/") {
+			return true, nil
+		}
+	}
+	return false, nil
+}
+
+// Pack takes original ZIP file bytes and a PackInput, and returns new ZIP bytes
+// with all silo/ entries replaced by the data from input. Non-silo entries
+// (FreeCAD Document.xml, thumbnails, etc.) are copied verbatim with their
+// original compression method and timestamps preserved.
+//
+// If the original ZIP contains no silo/ directory, the original bytes are
+// returned unchanged (plain .fcstd pass-through).
+func Pack(original []byte, input *PackInput) ([]byte, error) {
+	r, err := zip.NewReader(bytes.NewReader(original), int64(len(original)))
+	if err != nil {
+		return nil, fmt.Errorf("kc: open zip: %w", err)
+	}
+
+	// Partition entries into silo/ vs non-silo.
+	hasSilo := false
+	for _, f := range r.File {
+		if f.Name == "silo/" || strings.HasPrefix(f.Name, "silo/") {
+			hasSilo = true
+			break
+		}
+	}
+	if !hasSilo {
+		return original, nil // plain .fcstd, no repacking needed
+	}
+
+	var buf bytes.Buffer
+	zw := zip.NewWriter(&buf)
+
+	// Copy all non-silo entries verbatim.
+	for _, f := range r.File {
+		if f.Name == "silo/" || strings.HasPrefix(f.Name, "silo/") {
+			continue
+		}
+		if err := copyZipEntry(zw, f); err != nil {
+			return nil, fmt.Errorf("kc: copying entry %s: %w", f.Name, err)
+		}
+	}
+
+	// Write new silo/ entries from PackInput.
+	if input.Manifest != nil {
+		if err := writeJSONEntry(zw, "silo/manifest.json", input.Manifest); err != nil {
+			return nil, fmt.Errorf("kc: writing manifest.json: %w", err)
+		}
+	}
+	if input.Metadata != nil {
+		if err := writeJSONEntry(zw, "silo/metadata.json", input.Metadata); err != nil {
+			return nil, fmt.Errorf("kc: writing metadata.json: %w", err)
+		}
+	}
+	if input.History != nil {
+		if err := writeJSONEntry(zw, "silo/history.json", input.History); err != nil {
+			return nil, fmt.Errorf("kc: writing history.json: %w", err)
+		}
+	}
+	if input.Dependencies != nil {
+		if err := writeJSONEntry(zw, "silo/dependencies.json", input.Dependencies); err != nil {
+			return nil, fmt.Errorf("kc: writing dependencies.json: %w", err)
+		}
+	}
+
+	if err := zw.Close(); err != nil {
+		return nil, fmt.Errorf("kc: closing zip writer: %w", err)
+	}
+
+	return buf.Bytes(), nil
+}
+
+// copyZipEntry copies a single entry from the original ZIP to the new writer,
+// preserving the file header (compression method, timestamps, etc.).
+func copyZipEntry(zw *zip.Writer, f *zip.File) error {
+	header := f.FileHeader
+	w, err := zw.CreateHeader(&header)
+	if err != nil {
+		return err
+	}
+
+	rc, err := f.Open()
+	if err != nil {
+		return err
+	}
+	defer rc.Close()
+
+	_, err = io.Copy(w, rc)
+	return err
+}
+
+// writeJSONEntry writes a new silo/ entry as JSON with Deflate compression.
+func writeJSONEntry(zw *zip.Writer, name string, v any) error {
+	data, err := json.MarshalIndent(v, "", "  ")
+	if err != nil {
+		return err
+	}
+
+	header := &zip.FileHeader{
+		Name:   name,
+		Method: zip.Deflate,
+	}
+	w, err := zw.CreateHeader(header)
+	if err != nil {
+		return err
+	}
+
+	_, err = w.Write(data)
+	return err
+}

internal/kc/pack_test.go

@@ -0,0 +1,229 @@
+package kc
+
+import (
+	"archive/zip"
+	"bytes"
+	"io"
+	"testing"
+)
+
+func TestHasSiloDir_PlainFCStd(t *testing.T) {
+	data := buildZip(t, map[string][]byte{
+		"Document.xml": []byte("<xml/>"),
+	})
+	has, err := HasSiloDir(data)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if has {
+		t.Fatal("expected false for plain .fcstd")
+	}
+}
+
+func TestHasSiloDir_KC(t *testing.T) {
+	data := buildZip(t, map[string][]byte{
+		"Document.xml":       []byte("<xml/>"),
+		"silo/manifest.json": []byte("{}"),
+	})
+	has, err := HasSiloDir(data)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if !has {
+		t.Fatal("expected true for .kc with silo/ dir")
+	}
+}
+
+func TestHasSiloDir_NotAZip(t *testing.T) {
+	_, err := HasSiloDir([]byte("not a zip"))
+	if err == nil {
+		t.Fatal("expected error for non-ZIP data")
+	}
+}
+
+func TestPack_PlainFCStd_Passthrough(t *testing.T) {
+	original := buildZip(t, map[string][]byte{
+		"Document.xml":     []byte("<xml/>"),
+		"thumbnails/a.png": []byte("png-data"),
+	})
+
+	result, err := Pack(original, &PackInput{
+		Manifest: &Manifest{UUID: "test"},
+	})
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if !bytes.Equal(result, original) {
+		t.Fatal("expected original bytes returned unchanged for plain .fcstd")
+	}
+}
+
+func TestPack_RoundTrip(t *testing.T) {
+	// Build a .kc with old silo/ data
+	oldManifest := Manifest{UUID: "old-uuid", KCVersion: "0.9", RevisionHash: "old-hash"}
+	oldMetadata := Metadata{SchemaName: "old-schema", Tags: []string{"old"}, LifecycleState: "draft"}
+
+	original := buildZip(t, map[string][]byte{
+		"Document.xml":       []byte("<freecad/>"),
+		"thumbnails/t.png":   []byte("thumb-data"),
+		"silo/manifest.json": mustJSON(t, oldManifest),
+		"silo/metadata.json": mustJSON(t, oldMetadata),
+	})
+
+	// Pack with new data
+	newManifest := &Manifest{UUID: "new-uuid", KCVersion: "1.0", RevisionHash: "new-hash", SiloInstance: "https://silo.test"}
+	newMetadata := &Metadata{SchemaName: "mechanical-part-v2", Tags: []string{"aluminum", "structural"}, LifecycleState: "review", Fields: map[string]any{"material": "7075-T6"}}
+	comment := "initial commit"
+	history := []HistoryEntry{
+		{RevisionNumber: 1, CreatedAt: "2026-01-01T00:00:00Z", Comment: &comment, Status: "draft", Labels: []string{}},
+	}
+
+	packed, err := Pack(original, &PackInput{
+		Manifest:     newManifest,
+		Metadata:     newMetadata,
+		History:      history,
+		Dependencies: []Dependency{},
+	})
+	if err != nil {
+		t.Fatalf("Pack error: %v", err)
+	}
+
+	// Extract and verify new silo/ data
+	result, err := Extract(packed)
+	if err != nil {
+		t.Fatalf("Extract error: %v", err)
+	}
+	if result == nil {
+		t.Fatal("expected non-nil extract result")
+	}
+	if result.Manifest.UUID != "new-uuid" {
+		t.Errorf("manifest UUID = %q, want %q", result.Manifest.UUID, "new-uuid")
+	}
+	if result.Manifest.KCVersion != "1.0" {
+		t.Errorf("manifest KCVersion = %q, want %q", result.Manifest.KCVersion, "1.0")
+	}
+	if result.Manifest.SiloInstance != "https://silo.test" {
+		t.Errorf("manifest SiloInstance = %q, want %q", result.Manifest.SiloInstance, "https://silo.test")
+	}
+	if result.Metadata.SchemaName != "mechanical-part-v2" {
+		t.Errorf("metadata SchemaName = %q, want %q", result.Metadata.SchemaName, "mechanical-part-v2")
+	}
+	if result.Metadata.LifecycleState != "review" {
+		t.Errorf("metadata LifecycleState = %q, want %q", result.Metadata.LifecycleState, "review")
+	}
+	if len(result.Metadata.Tags) != 2 {
+		t.Errorf("metadata Tags len = %d, want 2", len(result.Metadata.Tags))
+	}
+	if result.Metadata.Fields["material"] != "7075-T6" {
+		t.Errorf("metadata Fields[material] = %v, want 7075-T6", result.Metadata.Fields["material"])
+	}
+
+	// Verify non-silo entries are preserved
+	r, err := zip.NewReader(bytes.NewReader(packed), int64(len(packed)))
+	if err != nil {
+		t.Fatalf("opening packed ZIP: %v", err)
+	}
+	entryMap := make(map[string]bool)
+	for _, f := range r.File {
+		entryMap[f.Name] = true
+	}
+	if !entryMap["Document.xml"] {
+		t.Error("Document.xml missing from packed ZIP")
+	}
+	if !entryMap["thumbnails/t.png"] {
+		t.Error("thumbnails/t.png missing from packed ZIP")
+	}
+
+	// Verify non-silo content is byte-identical
+	for _, f := range r.File {
+		if f.Name == "Document.xml" {
+			content := readZipEntry(t, f)
+			if string(content) != "<freecad/>" {
+				t.Errorf("Document.xml content = %q, want %q", content, "<freecad/>")
+			}
+		}
+		if f.Name == "thumbnails/t.png" {
+			content := readZipEntry(t, f)
+			if string(content) != "thumb-data" {
+				t.Errorf("thumbnails/t.png content = %q, want %q", content, "thumb-data")
+			}
+		}
+	}
+}
+
+func TestPack_NilFields(t *testing.T) {
+	original := buildZip(t, map[string][]byte{
+		"Document.xml":       []byte("<xml/>"),
+		"silo/manifest.json": []byte(`{"uuid":"x"}`),
+	})
+
+	// Pack with only manifest, nil metadata/history/deps
+	packed, err := Pack(original, &PackInput{
+		Manifest: &Manifest{UUID: "updated"},
+	})
+	if err != nil {
+		t.Fatalf("Pack error: %v", err)
+	}
+
+	// Extract — should have manifest but no metadata
+	result, err := Extract(packed)
+	if err != nil {
+		t.Fatalf("Extract error: %v", err)
+	}
+	if result.Manifest == nil || result.Manifest.UUID != "updated" {
+		t.Errorf("manifest UUID = %v, want updated", result.Manifest)
+	}
+	if result.Metadata != nil {
+		t.Errorf("expected nil metadata, got %+v", result.Metadata)
+	}
+
+	// Verify no old silo/ entries leaked through
+	r, _ := zip.NewReader(bytes.NewReader(packed), int64(len(packed)))
+	for _, f := range r.File {
+		if f.Name == "silo/metadata.json" {
+			t.Error("old silo/metadata.json should have been removed")
+		}
+	}
+}
+
+func TestPack_EmptyDependencies(t *testing.T) {
+	original := buildZip(t, map[string][]byte{
+		"silo/manifest.json": []byte(`{"uuid":"x"}`),
+	})
+
+	packed, err := Pack(original, &PackInput{
+		Manifest:     &Manifest{UUID: "x"},
+		Dependencies: []Dependency{},
+	})
+	if err != nil {
+		t.Fatalf("Pack error: %v", err)
+	}
+
+	// Verify dependencies.json exists and is []
+	r, _ := zip.NewReader(bytes.NewReader(packed), int64(len(packed)))
+	for _, f := range r.File {
+		if f.Name == "silo/dependencies.json" {
+			content := readZipEntry(t, f)
+			if string(content) != "[]" {
+				t.Errorf("dependencies.json = %q, want %q", content, "[]")
+			}
+			return
+		}
+	}
+	t.Error("silo/dependencies.json not found in packed ZIP")
+}
+
+// readZipEntry reads the full contents of a zip.File.
+func readZipEntry(t *testing.T, f *zip.File) []byte {
+	t.Helper()
+	rc, err := f.Open()
+	if err != nil {
+		t.Fatalf("opening zip entry %s: %v", f.Name, err)
+	}
+	defer rc.Close()
+	data, err := io.ReadAll(rc)
+	if err != nil {
+		t.Fatalf("reading zip entry %s: %v", f.Name, err)
+	}
+	return data
+}

internal/modules/loader.go

@@ -0,0 +1,84 @@
+package modules
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+	"github.com/kindredsystems/silo/internal/config"
+)
+
+// LoadState applies module state from config YAML and database overrides.
+//
+// Precedence (highest wins):
+//  1. Database module_state table
+//  2. YAML modules.* toggles
+//  3. Backward-compat YAML fields (auth.enabled, odoo.enabled)
+//  4. Module defaults (set by NewRegistry)
+func LoadState(r *Registry, cfg *config.Config, pool *pgxpool.Pool) error {
+	// Step 1: Apply backward-compat top-level YAML fields.
+	// auth.enabled and odoo.enabled existed before the modules section.
+	// Only apply if the new modules.* section doesn't override them.
+	if cfg.Modules.Auth == nil {
+		r.setEnabledUnchecked(Auth, cfg.Auth.Enabled)
+	}
+	if cfg.Modules.Odoo == nil {
+		r.setEnabledUnchecked(Odoo, cfg.Odoo.Enabled)
+	}
+
+	// Step 2: Apply explicit modules.* YAML toggles (override defaults + compat).
+	applyToggle(r, Auth, cfg.Modules.Auth)
+	applyToggle(r, Projects, cfg.Modules.Projects)
+	applyToggle(r, Audit, cfg.Modules.Audit)
+	applyToggle(r, Odoo, cfg.Modules.Odoo)
+	applyToggle(r, FreeCAD, cfg.Modules.FreeCAD)
+	applyToggle(r, Jobs, cfg.Modules.Jobs)
+	applyToggle(r, DAG, cfg.Modules.DAG)
+
+	// Step 3: Apply database overrides (highest precedence).
+	if pool != nil {
+		if err := loadFromDB(r, pool); err != nil {
+			return err
+		}
+	}
+
+	// Step 4: Validate the final state.
+	return r.ValidateDependencies()
+}
+
+// applyToggle sets a module's state from a YAML ModuleToggle if present.
+func applyToggle(r *Registry, id string, toggle *config.ModuleToggle) {
+	if toggle == nil || toggle.Enabled == nil {
+		return
+	}
+	r.setEnabledUnchecked(id, *toggle.Enabled)
+}
+
+// setEnabledUnchecked sets module state without dependency validation.
+// Used during loading when the full state is being assembled incrementally.
+func (r *Registry) setEnabledUnchecked(id string, enabled bool) {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	if m, ok := r.modules[id]; ok && !m.Required {
+		m.enabled = enabled
+	}
+}
+
+// loadFromDB reads module_state rows and applies them to the registry.
+func loadFromDB(r *Registry, pool *pgxpool.Pool) error {
+	rows, err := pool.Query(context.Background(),
+		`SELECT module_id, enabled FROM module_state`)
+	if err != nil {
+		return err
+	}
+	defer rows.Close()
+
+	for rows.Next() {
+		var id string
+		var enabled bool
+		if err := rows.Scan(&id, &enabled); err != nil {
+			return err
+		}
+		r.setEnabledUnchecked(id, enabled)
+	}
+	return rows.Err()
+}

internal/modules/loader_test.go

@@ -0,0 +1,88 @@
+package modules
+
+import (
+	"testing"
+
+	"github.com/kindredsystems/silo/internal/config"
+)
+
+func boolPtr(v bool) *bool { return &v }
+
+func TestLoadState_DefaultsOnly(t *testing.T) {
+	r := NewRegistry()
+	cfg := &config.Config{}
+
+	if err := LoadState(r, cfg, nil); err != nil {
+		t.Fatalf("LoadState: %v", err)
+	}
+
+	// Auth defaults to true from registry, but cfg.Auth.Enabled is false
+	// (zero value) and backward-compat applies, so auth ends up disabled.
+	if r.IsEnabled(Auth) {
+		t.Error("auth should be disabled (cfg.Auth.Enabled is false by default)")
+	}
+}
+
+func TestLoadState_BackwardCompat(t *testing.T) {
+	r := NewRegistry()
+	cfg := &config.Config{}
+	cfg.Auth.Enabled = true
+	cfg.Odoo.Enabled = true
+
+	if err := LoadState(r, cfg, nil); err != nil {
+		t.Fatalf("LoadState: %v", err)
+	}
+
+	if !r.IsEnabled(Auth) {
+		t.Error("auth should be enabled via cfg.Auth.Enabled")
+	}
+	if !r.IsEnabled(Odoo) {
+		t.Error("odoo should be enabled via cfg.Odoo.Enabled")
+	}
+}
+
+func TestLoadState_YAMLModulesOverrideCompat(t *testing.T) {
+	r := NewRegistry()
+	cfg := &config.Config{}
+	cfg.Auth.Enabled = true                                          // compat says enabled
+	cfg.Modules.Auth = &config.ModuleToggle{Enabled: boolPtr(false)} // explicit says disabled
+
+	if err := LoadState(r, cfg, nil); err != nil {
+		t.Fatalf("LoadState: %v", err)
+	}
+
+	if r.IsEnabled(Auth) {
+		t.Error("modules.auth.enabled=false should override auth.enabled=true")
+	}
+}
+
+func TestLoadState_EnableJobsAndDAG(t *testing.T) {
+	r := NewRegistry()
+	cfg := &config.Config{}
+	cfg.Auth.Enabled = true
+	cfg.Modules.Jobs = &config.ModuleToggle{Enabled: boolPtr(true)}
+	cfg.Modules.DAG = &config.ModuleToggle{Enabled: boolPtr(true)}
+
+	if err := LoadState(r, cfg, nil); err != nil {
+		t.Fatalf("LoadState: %v", err)
+	}
+
+	if !r.IsEnabled(Jobs) {
+		t.Error("jobs should be enabled")
+	}
+	if !r.IsEnabled(DAG) {
+		t.Error("dag should be enabled")
+	}
+}
+
+func TestLoadState_InvalidDependency(t *testing.T) {
+	r := NewRegistry()
+	cfg := &config.Config{}
+	// Auth disabled (default), but enable jobs which depends on auth.
+	cfg.Modules.Jobs = &config.ModuleToggle{Enabled: boolPtr(true)}
+
+	err := LoadState(r, cfg, nil)
+	if err == nil {
+		t.Error("should fail: jobs enabled but auth disabled")
+	}
+}

internal/modules/modules.go

@@ -0,0 +1,163 @@
+// Package modules provides the module registry for Silo.
+// Each module groups API endpoints, UI views, and configuration.
+// Modules can be required (always on) or optional (admin-toggleable).
+package modules
+
+import (
+	"fmt"
+	"sort"
+	"sync"
+)
+
+// Module IDs.
+const (
+	Core     = "core"
+	Schemas  = "schemas"
+	Storage  = "storage"
+	Auth     = "auth"
+	Projects = "projects"
+	Audit    = "audit"
+	Odoo     = "odoo"
+	FreeCAD  = "freecad"
+	Jobs     = "jobs"
+	DAG      = "dag"
+)
+
+// ModuleInfo describes a module's metadata.
+type ModuleInfo struct {
+	ID             string
+	Name           string
+	Description    string
+	Required       bool     // cannot be disabled
+	DefaultEnabled bool     // initial state for optional modules
+	DependsOn      []string // module IDs this module requires
+	Version        string
+}
+
+// registry entries with their runtime enabled state.
+type moduleState struct {
+	ModuleInfo
+	enabled bool
+}
+
+// Registry holds all module definitions and their enabled state.
+type Registry struct {
+	mu      sync.RWMutex
+	modules map[string]*moduleState
+}
+
+// builtinModules defines the complete set of Silo modules.
+var builtinModules = []ModuleInfo{
+	{ID: Core, Name: "Core PDM", Description: "Items, revisions, files, BOM, search, import/export", Required: true, Version: "0.2"},
+	{ID: Schemas, Name: "Schemas", Description: "Part numbering schema parsing and segment management", Required: true},
+	{ID: Storage, Name: "Storage", Description: "MinIO/S3 file storage, presigned uploads", Required: true},
+	{ID: Auth, Name: "Authentication", Description: "Local, LDAP, OIDC authentication and RBAC", DefaultEnabled: true},
+	{ID: Projects, Name: "Projects", Description: "Project management and item tagging", DefaultEnabled: true},
+	{ID: Audit, Name: "Audit", Description: "Audit logging, completeness scoring", DefaultEnabled: true},
+	{ID: Odoo, Name: "Odoo ERP", Description: "Odoo integration (config, sync-log, push/pull)", DependsOn: []string{Auth}},
+	{ID: FreeCAD, Name: "Create Integration", Description: "URI scheme, executable path, client settings", DefaultEnabled: true},
+	{ID: Jobs, Name: "Job Queue", Description: "Async compute jobs, runner management", DependsOn: []string{Auth}},
+	{ID: DAG, Name: "Dependency DAG", Description: "Feature DAG sync, validation states, interference detection", DependsOn: []string{Jobs}},
+}
+
+// NewRegistry creates a registry with all builtin modules set to their default state.
+func NewRegistry() *Registry {
+	r := &Registry{modules: make(map[string]*moduleState, len(builtinModules))}
+	for _, m := range builtinModules {
+		enabled := m.Required || m.DefaultEnabled
+		r.modules[m.ID] = &moduleState{ModuleInfo: m, enabled: enabled}
+	}
+	return r
+}
+
+// IsEnabled returns whether a module is currently enabled.
+func (r *Registry) IsEnabled(id string) bool {
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+	if m, ok := r.modules[id]; ok {
+		return m.enabled
+	}
+	return false
+}
+
+// SetEnabled changes a module's enabled state with dependency validation.
+func (r *Registry) SetEnabled(id string, enabled bool) error {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+
+	m, ok := r.modules[id]
+	if !ok {
+		return fmt.Errorf("unknown module %q", id)
+	}
+
+	if m.Required {
+		return fmt.Errorf("module %q is required and cannot be disabled", id)
+	}
+
+	if enabled {
+		// Check that all dependencies are enabled.
+		for _, dep := range m.DependsOn {
+			if dm, ok := r.modules[dep]; ok && !dm.enabled {
+				return fmt.Errorf("cannot enable %q: dependency %q is disabled", id, dep)
+			}
+		}
+	} else {
+		// Check that no enabled module depends on this one.
+		for _, other := range r.modules {
+			if !other.enabled || other.ID == id {
+				continue
+			}
+			for _, dep := range other.DependsOn {
+				if dep == id {
+					return fmt.Errorf("cannot disable %q: module %q depends on it", id, other.ID)
+				}
+			}
+		}
+	}
+
+	m.enabled = enabled
+	return nil
+}
+
+// All returns info for every module, sorted by ID.
+func (r *Registry) All() []ModuleInfo {
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+
+	out := make([]ModuleInfo, 0, len(r.modules))
+	for _, m := range r.modules {
+		out = append(out, m.ModuleInfo)
+	}
+	sort.Slice(out, func(i, j int) bool { return out[i].ID < out[j].ID })
+	return out
+}
+
+// Get returns info for a single module, or nil if not found.
+func (r *Registry) Get(id string) *ModuleInfo {
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+	if m, ok := r.modules[id]; ok {
+		info := m.ModuleInfo
+		return &info
+	}
+	return nil
+}
+
+// ValidateDependencies checks that every enabled module's dependencies
+// are also enabled. Returns the first violation found.
+func (r *Registry) ValidateDependencies() error {
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+
+	for _, m := range r.modules {
+		if !m.enabled {
+			continue
+		}
+		for _, dep := range m.DependsOn {
+			if dm, ok := r.modules[dep]; ok && !dm.enabled {
+				return fmt.Errorf("module %q is enabled but its dependency %q is disabled", m.ID, dep)
+			}
+		}
+	}
+	return nil
+}

internal/modules/modules_test.go

@@ -0,0 +1,169 @@
+package modules
+
+import (
+	"testing"
+)
+
+func TestNewRegistry_DefaultState(t *testing.T) {
+	r := NewRegistry()
+
+	// Required modules are always enabled.
+	for _, id := range []string{Core, Schemas, Storage} {
+		if !r.IsEnabled(id) {
+			t.Errorf("required module %q should be enabled by default", id)
+		}
+	}
+
+	// Optional modules with DefaultEnabled=true.
+	for _, id := range []string{Auth, Projects, Audit, FreeCAD} {
+		if !r.IsEnabled(id) {
+			t.Errorf("module %q should be enabled by default", id)
+		}
+	}
+
+	// Optional modules with DefaultEnabled=false.
+	for _, id := range []string{Odoo, Jobs, DAG} {
+		if r.IsEnabled(id) {
+			t.Errorf("module %q should be disabled by default", id)
+		}
+	}
+}
+
+func TestSetEnabled_BasicToggle(t *testing.T) {
+	r := NewRegistry()
+
+	// Disable an optional module with no dependents.
+	if err := r.SetEnabled(Projects, false); err != nil {
+		t.Fatalf("disabling projects: %v", err)
+	}
+	if r.IsEnabled(Projects) {
+		t.Error("projects should be disabled after SetEnabled(false)")
+	}
+
+	// Re-enable it.
+	if err := r.SetEnabled(Projects, true); err != nil {
+		t.Fatalf("enabling projects: %v", err)
+	}
+	if !r.IsEnabled(Projects) {
+		t.Error("projects should be enabled after SetEnabled(true)")
+	}
+}
+
+func TestCannotDisableRequired(t *testing.T) {
+	r := NewRegistry()
+
+	for _, id := range []string{Core, Schemas, Storage} {
+		if err := r.SetEnabled(id, false); err == nil {
+			t.Errorf("disabling required module %q should return error", id)
+		}
+	}
+}
+
+func TestDependencyChain_EnableWithoutDep(t *testing.T) {
+	r := NewRegistry()
+
+	// Jobs depends on Auth. Auth is enabled by default, so enabling jobs works.
+	if err := r.SetEnabled(Jobs, true); err != nil {
+		t.Fatalf("enabling jobs (auth enabled): %v", err)
+	}
+
+	// DAG depends on Jobs. Jobs is now enabled, so enabling dag works.
+	if err := r.SetEnabled(DAG, true); err != nil {
+		t.Fatalf("enabling dag (jobs enabled): %v", err)
+	}
+
+	// Now try with deps disabled. Start fresh.
+	r2 := NewRegistry()
+
+	// DAG depends on Jobs, which is disabled by default.
+	if err := r2.SetEnabled(DAG, true); err == nil {
+		t.Error("enabling dag without jobs should fail")
+	}
+}
+
+func TestDisableDependedOn(t *testing.T) {
+	r := NewRegistry()
+
+	// Enable the full chain: auth (already on) → jobs → dag.
+	if err := r.SetEnabled(Jobs, true); err != nil {
+		t.Fatal(err)
+	}
+	if err := r.SetEnabled(DAG, true); err != nil {
+		t.Fatal(err)
+	}
+
+	// Cannot disable jobs while dag depends on it.
+	if err := r.SetEnabled(Jobs, false); err == nil {
+		t.Error("disabling jobs while dag is enabled should fail")
+	}
+
+	// Disable dag first, then jobs should work.
+	if err := r.SetEnabled(DAG, false); err != nil {
+		t.Fatal(err)
+	}
+	if err := r.SetEnabled(Jobs, false); err != nil {
+		t.Fatalf("disabling jobs after dag disabled: %v", err)
+	}
+}
+
+func TestCannotDisableAuthWhileJobsEnabled(t *testing.T) {
+	r := NewRegistry()
+
+	if err := r.SetEnabled(Jobs, true); err != nil {
+		t.Fatal(err)
+	}
+
+	// Auth is depended on by jobs.
+	if err := r.SetEnabled(Auth, false); err == nil {
+		t.Error("disabling auth while jobs is enabled should fail")
+	}
+}
+
+func TestUnknownModule(t *testing.T) {
+	r := NewRegistry()
+
+	if r.IsEnabled("nonexistent") {
+		t.Error("unknown module should not be enabled")
+	}
+	if err := r.SetEnabled("nonexistent", true); err == nil {
+		t.Error("setting unknown module should return error")
+	}
+	if r.Get("nonexistent") != nil {
+		t.Error("getting unknown module should return nil")
+	}
+}
+
+func TestAll_ReturnsAllModules(t *testing.T) {
+	r := NewRegistry()
+	all := r.All()
+
+	if len(all) != 10 {
+		t.Errorf("expected 10 modules, got %d", len(all))
+	}
+
+	// Should be sorted by ID.
+	for i := 1; i < len(all); i++ {
+		if all[i].ID < all[i-1].ID {
+			t.Errorf("modules not sorted: %s before %s", all[i-1].ID, all[i].ID)
+		}
+	}
+}
+
+func TestValidateDependencies(t *testing.T) {
+	r := NewRegistry()
+
+	// Default state should be valid.
+	if err := r.ValidateDependencies(); err != nil {
+		t.Fatalf("default state should be valid: %v", err)
+	}
+
+	// Force an invalid state by directly mutating (bypassing SetEnabled).
+	r.mu.Lock()
+	r.modules[Jobs].enabled = true
+	r.modules[Auth].enabled = false
+	r.mu.Unlock()
+
+	if err := r.ValidateDependencies(); err == nil {
+		t.Error("should detect jobs enabled without auth")
+	}
+}

internal/storage/filesystem.go

@@ -0,0 +1,177 @@
+package storage
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"io"
+	"net/url"
+	"os"
+	"path/filepath"
+	"time"
+)
+
+// ErrPresignNotSupported is returned when presigned URLs are requested from a
+// backend that does not support them.
+var ErrPresignNotSupported = errors.New("presigned URLs not supported by filesystem backend")
+
+// Compile-time check: *FilesystemStore implements FileStore.
+var _ FileStore = (*FilesystemStore)(nil)
+
+// FilesystemStore stores objects as files under a root directory.
+type FilesystemStore struct {
+	root string // absolute path
+}
+
+// NewFilesystemStore creates a new filesystem-backed store rooted at root.
+// The directory is created if it does not exist.
+func NewFilesystemStore(root string) (*FilesystemStore, error) {
+	abs, err := filepath.Abs(root)
+	if err != nil {
+		return nil, fmt.Errorf("resolving root path: %w", err)
+	}
+	if err := os.MkdirAll(abs, 0o755); err != nil {
+		return nil, fmt.Errorf("creating root directory: %w", err)
+	}
+	return &FilesystemStore{root: abs}, nil
+}
+
+// path returns the absolute filesystem path for a storage key.
+func (fs *FilesystemStore) path(key string) string {
+	return filepath.Join(fs.root, filepath.FromSlash(key))
+}
+
+// Put writes reader to the file at key using atomic rename.
+// SHA-256 checksum is computed during write and returned in PutResult.
+func (fs *FilesystemStore) Put(_ context.Context, key string, reader io.Reader, _ int64, _ string) (*PutResult, error) {
+	dest := fs.path(key)
+
+	if err := os.MkdirAll(filepath.Dir(dest), 0o755); err != nil {
+		return nil, fmt.Errorf("creating directories: %w", err)
+	}
+
+	// Write to a temp file in the same directory so os.Rename is atomic.
+	tmp, err := os.CreateTemp(filepath.Dir(dest), ".silo-tmp-*")
+	if err != nil {
+		return nil, fmt.Errorf("creating temp file: %w", err)
+	}
+	tmpPath := tmp.Name()
+	defer func() {
+		// Clean up temp file on any failure path.
+		tmp.Close()
+		os.Remove(tmpPath)
+	}()
+
+	h := sha256.New()
+	w := io.MultiWriter(tmp, h)
+
+	n, err := io.Copy(w, reader)
+	if err != nil {
+		return nil, fmt.Errorf("writing file: %w", err)
+	}
+	if err := tmp.Close(); err != nil {
+		return nil, fmt.Errorf("closing temp file: %w", err)
+	}
+
+	if err := os.Rename(tmpPath, dest); err != nil {
+		return nil, fmt.Errorf("renaming temp file: %w", err)
+	}
+
+	return &PutResult{
+		Key:      key,
+		Size:     n,
+		Checksum: hex.EncodeToString(h.Sum(nil)),
+	}, nil
+}
+
+// Get opens the file at key for reading.
+func (fs *FilesystemStore) Get(_ context.Context, key string) (io.ReadCloser, error) {
+	f, err := os.Open(fs.path(key))
+	if err != nil {
+		return nil, fmt.Errorf("opening file: %w", err)
+	}
+	return f, nil
+}
+
+// GetVersion delegates to Get — filesystem storage has no versioning.
+func (fs *FilesystemStore) GetVersion(ctx context.Context, key string, _ string) (io.ReadCloser, error) {
+	return fs.Get(ctx, key)
+}
+
+// Delete removes the file at key. No error if already absent.
+func (fs *FilesystemStore) Delete(_ context.Context, key string) error {
+	err := os.Remove(fs.path(key))
+	if err != nil && !errors.Is(err, os.ErrNotExist) {
+		return fmt.Errorf("removing file: %w", err)
+	}
+	return nil
+}
+
+// Exists reports whether the file at key exists.
+func (fs *FilesystemStore) Exists(_ context.Context, key string) (bool, error) {
+	_, err := os.Stat(fs.path(key))
+	if err == nil {
+		return true, nil
+	}
+	if errors.Is(err, os.ErrNotExist) {
+		return false, nil
+	}
+	return false, fmt.Errorf("checking file: %w", err)
+}
+
+// Copy duplicates a file from srcKey to dstKey using atomic rename.
+func (fs *FilesystemStore) Copy(_ context.Context, srcKey, dstKey string) error {
+	srcPath := fs.path(srcKey)
+	dstPath := fs.path(dstKey)
+
+	src, err := os.Open(srcPath)
+	if err != nil {
+		return fmt.Errorf("opening source: %w", err)
+	}
+	defer src.Close()
+
+	if err := os.MkdirAll(filepath.Dir(dstPath), 0o755); err != nil {
+		return fmt.Errorf("creating directories: %w", err)
+	}
+
+	tmp, err := os.CreateTemp(filepath.Dir(dstPath), ".silo-tmp-*")
+	if err != nil {
+		return fmt.Errorf("creating temp file: %w", err)
+	}
+	tmpPath := tmp.Name()
+	defer func() {
+		tmp.Close()
+		os.Remove(tmpPath)
+	}()
+
+	if _, err := io.Copy(tmp, src); err != nil {
+		return fmt.Errorf("copying file: %w", err)
+	}
+	if err := tmp.Close(); err != nil {
+		return fmt.Errorf("closing temp file: %w", err)
+	}
+
+	if err := os.Rename(tmpPath, dstPath); err != nil {
+		return fmt.Errorf("renaming temp file: %w", err)
+	}
+	return nil
+}
+
+// PresignPut is not supported by the filesystem backend.
+func (fs *FilesystemStore) PresignPut(_ context.Context, _ string, _ time.Duration) (*url.URL, error) {
+	return nil, ErrPresignNotSupported
+}
+
+// Ping verifies the root directory is accessible and writable.
+func (fs *FilesystemStore) Ping(_ context.Context) error {
+	tmp, err := os.CreateTemp(fs.root, ".silo-ping-*")
+	if err != nil {
+		return fmt.Errorf("storage ping failed: %w", err)
+	}
+	name := tmp.Name()
+	tmp.Close()
+	os.Remove(name)
+	return nil
+}

internal/storage/filesystem_test.go

@@ -0,0 +1,277 @@
+package storage
+
+import (
+	"bytes"
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func newTestStore(t *testing.T) *FilesystemStore {
+	t.Helper()
+	fs, err := NewFilesystemStore(t.TempDir())
+	if err != nil {
+		t.Fatalf("NewFilesystemStore: %v", err)
+	}
+	return fs
+}
+
+func TestNewFilesystemStore(t *testing.T) {
+	dir := t.TempDir()
+	sub := filepath.Join(dir, "a", "b")
+	fs, err := NewFilesystemStore(sub)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if !filepath.IsAbs(fs.root) {
+		t.Errorf("root is not absolute: %s", fs.root)
+	}
+	info, err := os.Stat(sub)
+	if err != nil {
+		t.Fatalf("root dir missing: %v", err)
+	}
+	if !info.IsDir() {
+		t.Error("root is not a directory")
+	}
+}
+
+func TestPut(t *testing.T) {
+	fs := newTestStore(t)
+	ctx := context.Background()
+	data := []byte("hello world")
+	h := sha256.Sum256(data)
+	wantChecksum := hex.EncodeToString(h[:])
+
+	result, err := fs.Put(ctx, "items/P001/rev1.FCStd", bytes.NewReader(data), int64(len(data)), "application/octet-stream")
+	if err != nil {
+		t.Fatalf("Put: %v", err)
+	}
+	if result.Key != "items/P001/rev1.FCStd" {
+		t.Errorf("Key = %q, want %q", result.Key, "items/P001/rev1.FCStd")
+	}
+	if result.Size != int64(len(data)) {
+		t.Errorf("Size = %d, want %d", result.Size, len(data))
+	}
+	if result.Checksum != wantChecksum {
+		t.Errorf("Checksum = %q, want %q", result.Checksum, wantChecksum)
+	}
+
+	// Verify file on disk.
+	got, err := os.ReadFile(fs.path("items/P001/rev1.FCStd"))
+	if err != nil {
+		t.Fatalf("reading file: %v", err)
+	}
+	if !bytes.Equal(got, data) {
+		t.Error("file content mismatch")
+	}
+}
+
+func TestPutAtomicity(t *testing.T) {
+	fs := newTestStore(t)
+	ctx := context.Background()
+	key := "test/atomic.bin"
+
+	// Write an initial file.
+	if _, err := fs.Put(ctx, key, strings.NewReader("original"), 8, ""); err != nil {
+		t.Fatalf("initial Put: %v", err)
+	}
+
+	// Write with a reader that fails partway through.
+	failing := io.MultiReader(strings.NewReader("partial"), &errReader{})
+	_, err := fs.Put(ctx, key, failing, 100, "")
+	if err == nil {
+		t.Fatal("expected error from failing reader")
+	}
+
+	// Original file should still be intact.
+	got, err := os.ReadFile(fs.path(key))
+	if err != nil {
+		t.Fatalf("reading file after failed put: %v", err)
+	}
+	if string(got) != "original" {
+		t.Errorf("file content = %q, want %q", got, "original")
+	}
+}
+
+type errReader struct{}
+
+func (e *errReader) Read([]byte) (int, error) {
+	return 0, io.ErrUnexpectedEOF
+}
+
+func TestGet(t *testing.T) {
+	fs := newTestStore(t)
+	ctx := context.Background()
+	data := []byte("test content")
+
+	if _, err := fs.Put(ctx, "f.txt", bytes.NewReader(data), int64(len(data)), ""); err != nil {
+		t.Fatalf("Put: %v", err)
+	}
+
+	rc, err := fs.Get(ctx, "f.txt")
+	if err != nil {
+		t.Fatalf("Get: %v", err)
+	}
+	defer rc.Close()
+
+	got, err := io.ReadAll(rc)
+	if err != nil {
+		t.Fatalf("ReadAll: %v", err)
+	}
+	if !bytes.Equal(got, data) {
+		t.Error("content mismatch")
+	}
+}
+
+func TestGetMissing(t *testing.T) {
+	fs := newTestStore(t)
+	_, err := fs.Get(context.Background(), "no/such/file")
+	if err == nil {
+		t.Fatal("expected error for missing file")
+	}
+}
+
+func TestGetVersion(t *testing.T) {
+	fs := newTestStore(t)
+	ctx := context.Background()
+	data := []byte("versioned")
+
+	if _, err := fs.Put(ctx, "v.txt", bytes.NewReader(data), int64(len(data)), ""); err != nil {
+		t.Fatalf("Put: %v", err)
+	}
+
+	// GetVersion ignores versionID, returns same file.
+	rc, err := fs.GetVersion(ctx, "v.txt", "ignored-version-id")
+	if err != nil {
+		t.Fatalf("GetVersion: %v", err)
+	}
+	defer rc.Close()
+
+	got, err := io.ReadAll(rc)
+	if err != nil {
+		t.Fatalf("ReadAll: %v", err)
+	}
+	if !bytes.Equal(got, data) {
+		t.Error("content mismatch")
+	}
+}
+
+func TestDelete(t *testing.T) {
+	fs := newTestStore(t)
+	ctx := context.Background()
+
+	if _, err := fs.Put(ctx, "del.txt", strings.NewReader("x"), 1, ""); err != nil {
+		t.Fatalf("Put: %v", err)
+	}
+
+	if err := fs.Delete(ctx, "del.txt"); err != nil {
+		t.Fatalf("Delete: %v", err)
+	}
+
+	if _, err := os.Stat(fs.path("del.txt")); !os.IsNotExist(err) {
+		t.Error("file still exists after delete")
+	}
+}
+
+func TestDeleteMissing(t *testing.T) {
+	fs := newTestStore(t)
+	if err := fs.Delete(context.Background(), "no/such/file"); err != nil {
+		t.Fatalf("Delete missing file should not error: %v", err)
+	}
+}
+
+func TestExists(t *testing.T) {
+	fs := newTestStore(t)
+	ctx := context.Background()
+
+	ok, err := fs.Exists(ctx, "nope")
+	if err != nil {
+		t.Fatalf("Exists: %v", err)
+	}
+	if ok {
+		t.Error("Exists returned true for missing file")
+	}
+
+	if _, err := fs.Put(ctx, "yes.txt", strings.NewReader("y"), 1, ""); err != nil {
+		t.Fatalf("Put: %v", err)
+	}
+
+	ok, err = fs.Exists(ctx, "yes.txt")
+	if err != nil {
+		t.Fatalf("Exists: %v", err)
+	}
+	if !ok {
+		t.Error("Exists returned false for existing file")
+	}
+}
+
+func TestCopy(t *testing.T) {
+	fs := newTestStore(t)
+	ctx := context.Background()
+	data := []byte("copy me")
+
+	if _, err := fs.Put(ctx, "src.bin", bytes.NewReader(data), int64(len(data)), ""); err != nil {
+		t.Fatalf("Put: %v", err)
+	}
+
+	if err := fs.Copy(ctx, "src.bin", "deep/nested/dst.bin"); err != nil {
+		t.Fatalf("Copy: %v", err)
+	}
+
+	got, err := os.ReadFile(fs.path("deep/nested/dst.bin"))
+	if err != nil {
+		t.Fatalf("reading copied file: %v", err)
+	}
+	if !bytes.Equal(got, data) {
+		t.Error("copied content mismatch")
+	}
+
+	// Source should still exist.
+	if _, err := os.Stat(fs.path("src.bin")); err != nil {
+		t.Error("source file missing after copy")
+	}
+}
+
+func TestPresignPut(t *testing.T) {
+	fs := newTestStore(t)
+	_, err := fs.PresignPut(context.Background(), "key", 5*60)
+	if err != ErrPresignNotSupported {
+		t.Errorf("PresignPut error = %v, want ErrPresignNotSupported", err)
+	}
+}
+
+func TestPing(t *testing.T) {
+	fs := newTestStore(t)
+	if err := fs.Ping(context.Background()); err != nil {
+		t.Fatalf("Ping: %v", err)
+	}
+}
+
+func TestPingBadRoot(t *testing.T) {
+	fs := &FilesystemStore{root: "/nonexistent/path/that/should/not/exist"}
+	if err := fs.Ping(context.Background()); err == nil {
+		t.Fatal("expected Ping to fail with invalid root")
+	}
+}
+
+func TestPutOverwrite(t *testing.T) {
+	fs := newTestStore(t)
+	ctx := context.Background()
+
+	if _, err := fs.Put(ctx, "ow.txt", strings.NewReader("first"), 5, ""); err != nil {
+		t.Fatalf("Put: %v", err)
+	}
+	if _, err := fs.Put(ctx, "ow.txt", strings.NewReader("second"), 6, ""); err != nil {
+		t.Fatalf("Put overwrite: %v", err)
+	}
+
+	got, _ := os.ReadFile(fs.path("ow.txt"))
+	if string(got) != "second" {
+		t.Errorf("content = %q, want %q", got, "second")
+	}
+}

internal/storage/interface.go

@@ -0,0 +1,21 @@
+// Package storage defines the FileStore interface and backend implementations.
+package storage
+
+import (
+	"context"
+	"io"
+	"net/url"
+	"time"
+)
+
+// FileStore is the interface for file storage backends.
+type FileStore interface {
+	Put(ctx context.Context, key string, reader io.Reader, size int64, contentType string) (*PutResult, error)
+	Get(ctx context.Context, key string) (io.ReadCloser, error)
+	GetVersion(ctx context.Context, key string, versionID string) (io.ReadCloser, error)
+	Delete(ctx context.Context, key string) error
+	Exists(ctx context.Context, key string) (bool, error)
+	Copy(ctx context.Context, srcKey, dstKey string) error
+	PresignPut(ctx context.Context, key string, expiry time.Duration) (*url.URL, error)
+	Ping(ctx context.Context) error
+}

internal/storage/storage.go

@@ -1,4 +1,3 @@
-// Package storage provides MinIO file storage operations.
 package storage
 
 import (
@@ -22,6 +21,9 @@ type Config struct {
 	Region    string
 }
 
+// Compile-time check: *Storage implements FileStore.
+var _ FileStore = (*Storage)(nil)
+
 // Storage wraps MinIO client operations.
 type Storage struct {
 	client *minio.Client
@@ -112,6 +114,19 @@ func (s *Storage) Delete(ctx context.Context, key string) error {
 	return nil
 }
 
+// Exists checks if an object exists in storage.
+func (s *Storage) Exists(ctx context.Context, key string) (bool, error) {
+	_, err := s.client.StatObject(ctx, s.bucket, key, minio.StatObjectOptions{})
+	if err != nil {
+		resp := minio.ToErrorResponse(err)
+		if resp.Code == "NoSuchKey" {
+			return false, nil
+		}
+		return false, fmt.Errorf("checking object existence: %w", err)
+	}
+	return true, nil
+}
+
 // Ping checks if the storage backend is reachable by verifying the bucket exists.
 func (s *Storage) Ping(ctx context.Context) error {
 	_, err := s.client.BucketExists(ctx, s.bucket)

internal/testutil/testutil.go

@@ -3,7 +3,6 @@ package testutil
 
 import (
 	"context"
-	"fmt"
 	"os"
 	"path/filepath"
 	"sort"
@@ -80,11 +79,13 @@ func TruncateAll(t *testing.T, pool *pgxpool.Pool) {
 
 	_, err := pool.Exec(context.Background(), `
 		TRUNCATE
+			item_metadata, item_dependencies, approval_signatures, item_approvals, item_macros,
+			settings_overrides, module_state,
 			job_log, jobs, job_definitions, runners,
 			dag_cross_edges, dag_edges, dag_nodes,
 			audit_log, sync_log, api_tokens, sessions, item_files,
 			item_projects, relationships, revisions, inventory, items,
-			projects, sequences_by_name, users, property_migrations
+			locations, projects, sequences_by_name, users, property_migrations
 		CASCADE
 	`)
 	if err != nil {
@@ -111,6 +112,4 @@ func findProjectRoot(t *testing.T) string {
 		}
 		dir = parent
 	}
-
-	panic(fmt.Sprintf("unreachable"))
 }

migrations/016_module_system.sql

@@ -0,0 +1,15 @@
+-- 016_module_system.sql — settings overrides and module state persistence
+
+CREATE TABLE IF NOT EXISTS settings_overrides (
+    key         TEXT PRIMARY KEY,
+    value       JSONB NOT NULL,
+    updated_by  TEXT NOT NULL,
+    updated_at  TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE TABLE IF NOT EXISTS module_state (
+    module_id   TEXT PRIMARY KEY,
+    enabled     BOOLEAN NOT NULL,
+    updated_by  TEXT NOT NULL,
+    updated_at  TIMESTAMPTZ NOT NULL DEFAULT now()
+);

migrations/017_file_storage_metadata.sql

@@ -0,0 +1,7 @@
+-- Track which storage backend holds each attached file.
+ALTER TABLE item_files
+  ADD COLUMN IF NOT EXISTS storage_backend TEXT NOT NULL DEFAULT 'minio';
+
+-- Track which storage backend holds each revision file.
+ALTER TABLE revisions
+  ADD COLUMN IF NOT EXISTS file_storage_backend TEXT NOT NULL DEFAULT 'minio';

scripts/deploy.sh

@@ -77,6 +77,9 @@ if systemctl is-active --quiet silod 2>/dev/null; then
     sudo systemctl stop silod
 fi
 
+# Clean old frontend assets before extracting
+sudo rm -rf "$DEPLOY_DIR/web/dist/assets"
+
 # Extract
 echo "  Extracting..."
 sudo tar -xzf /tmp/silo-deploy.tar.gz -C "$DEPLOY_DIR"

scripts/migrate-storage.sh

@@ -0,0 +1,108 @@
+#!/bin/bash
+# Migrate storage from MinIO to filesystem on a remote Silo host.
+#
+# Builds the migrate-storage binary locally, uploads it to the target host,
+# then runs it over SSH using credentials from /etc/silo/silod.env.
+#
+# Usage: ./scripts/migrate-storage.sh <silo-host> <psql-host> <minio-host> [flags...]
+#
+# Examples:
+#   ./scripts/migrate-storage.sh silo.kindred.internal psql.kindred.internal minio.kindred.internal -dry-run -verbose
+#   ./scripts/migrate-storage.sh silo.kindred.internal psql.kindred.internal minio.kindred.internal
+
+set -euo pipefail
+
+if [ $# -lt 3 ]; then
+    echo "Usage: $0 <silo-host> <psql-host> <minio-host> [flags...]"
+    echo "  flags are passed to migrate-storage (e.g. -dry-run -verbose)"
+    exit 1
+fi
+
+TARGET="$1"
+DB_HOST="$2"
+MINIO_HOST="$3"
+shift 3
+EXTRA_FLAGS="$*"
+
+DEST_DIR="/opt/silo/data"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_DIR="${SCRIPT_DIR}/.."
+
+echo "=== Migrate Storage: MinIO -> Filesystem ==="
+echo "  Target:  ${TARGET}"
+echo "  DB host: ${DB_HOST}"
+echo "  MinIO:   ${MINIO_HOST}"
+echo "  Dest:    ${DEST_DIR}"
+[ -n "$EXTRA_FLAGS" ] && echo "  Flags:   ${EXTRA_FLAGS}"
+echo ""
+
+# --- Build locally ---
+echo "[1/3] Building migrate-storage binary..."
+cd "$PROJECT_DIR"
+GOOS=linux GOARCH=amd64 go build -o migrate-storage ./cmd/migrate-storage
+echo "  Built: $(du -h migrate-storage | cut -f1)"
+
+# --- Upload ---
+echo "[2/3] Uploading to ${TARGET}..."
+scp migrate-storage "${TARGET}:/tmp/migrate-storage"
+rm -f migrate-storage
+
+# --- Run remotely ---
+echo "[3/3] Running migration on ${TARGET}..."
+ssh "$TARGET" DB_HOST="$DB_HOST" MINIO_HOST="$MINIO_HOST" DEST_DIR="$DEST_DIR" EXTRA_FLAGS="$EXTRA_FLAGS" bash -s <<'REMOTE'
+set -euo pipefail
+
+CONFIG_DIR="/etc/silo"
+
+# Source credentials
+if [ ! -f "$CONFIG_DIR/silod.env" ]; then
+    echo "ERROR: $CONFIG_DIR/silod.env not found on $(hostname)"
+    exit 1
+fi
+set -a
+source "$CONFIG_DIR/silod.env"
+set +a
+
+# Ensure destination directory exists
+sudo mkdir -p "$DEST_DIR"
+sudo chown silo:silo "$DEST_DIR" 2>/dev/null || true
+
+chmod +x /tmp/migrate-storage
+
+# Write temporary config with the provided hosts
+cat > /tmp/silo-migrate.yaml <<EOF
+database:
+  host: "${DB_HOST}"
+  port: 5432
+  name: "silo"
+  user: "silo"
+  password: "${SILO_DB_PASSWORD}"
+  sslmode: "require"
+  max_connections: 5
+
+storage:
+  endpoint: "${MINIO_HOST}:9000"
+  access_key: "${SILO_MINIO_ACCESS_KEY}"
+  secret_key: "${SILO_MINIO_SECRET_KEY}"
+  bucket: "silo"
+  use_ssl: false
+  region: "us-east-1"
+EOF
+chmod 600 /tmp/silo-migrate.yaml
+
+echo "  Config written to /tmp/silo-migrate.yaml"
+echo "  Starting migration..."
+echo ""
+
+# Run the migration
+/tmp/migrate-storage -config /tmp/silo-migrate.yaml -dest "$DEST_DIR" $EXTRA_FLAGS
+
+# Clean up
+rm -f /tmp/silo-migrate.yaml /tmp/migrate-storage
+echo ""
+echo "  Cleaned up temp files."
+REMOTE
+
+echo ""
+echo "=== Migration complete ==="
+echo "  Files written to ${TARGET}:${DEST_DIR}"

web/index.html

@@ -1,12 +1,13 @@
 <!doctype html>
 <html lang="en">
-  <head>
-    <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>Silo</title>
-  </head>
-  <body>
-    <div id="root"></div>
-    <script type="module" src="/src/main.tsx"></script>
-  </body>
+    <head>
+        <meta charset="UTF-8" />
+        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+        <link rel="icon" type="image/svg+xml" href="/favicon.svg" />
+        <title>Silo</title>
+    </head>
+    <body>
+        <div id="root"></div>
+        <script type="module" src="/src/main.tsx"></script>
+    </body>
 </html>

web/public/favicon.svg

@@ -0,0 +1,106 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="1028"
+   height="1028"
+   viewBox="0 0 271.99167 271.99167"
+   version="1.1"
+   id="svg1"
+   inkscape:version="1.4.2 (2aeb623e1d, 2025-05-12)"
+   sodipodi:docname="kindred-logo.svg"
+   inkscape:export-filename="../3290ed6b/kindred-logo-blue-baack.png"
+   inkscape:export-xdpi="96"
+   inkscape:export-ydpi="96"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <sodipodi:namedview
+     id="namedview1"
+     pagecolor="#ffffff"
+     bordercolor="#000000"
+     borderopacity="0.25"
+     inkscape:showpageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     inkscape:deskcolor="#d1d1d1"
+     inkscape:document-units="mm"
+     showgrid="true"
+     inkscape:zoom="1.036062"
+     inkscape:cx="397.6596"
+     inkscape:cy="478.25323"
+     inkscape:window-width="2494"
+     inkscape:window-height="1371"
+     inkscape:window-x="1146"
+     inkscape:window-y="1112"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="layer1"
+     inkscape:export-bgcolor="#79c0c500">
+    <inkscape:grid
+       type="axonomgrid"
+       id="grid6"
+       units="mm"
+       originx="0"
+       originy="0"
+       spacingx="0.99999998"
+       spacingy="1"
+       empcolor="#0099e5"
+       empopacity="0.30196078"
+       color="#0099e5"
+       opacity="0.14901961"
+       empspacing="5"
+       dotted="false"
+       gridanglex="30"
+       gridanglez="30"
+       enabled="true"
+       visible="true" />
+  </sodipodi:namedview>
+  <defs
+     id="defs1">
+    <inkscape:perspective
+       sodipodi:type="inkscape:persp3d"
+       inkscape:vp_x="0 : 123.49166 : 1"
+       inkscape:vp_y="0 : 999.99998 : 0"
+       inkscape:vp_z="210.00001 : 123.49166 : 1"
+       inkscape:persp3d-origin="105 : 73.991665 : 1"
+       id="perspective1" />
+  </defs>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <path
+       sodipodi:type="star"
+       style="fill:#7c4a82;fill-opacity:1;stroke:#12101c;stroke-width:5;stroke-linejoin:miter;stroke-dasharray:none;stroke-opacity:1"
+       id="path6-81-5"
+       inkscape:flatsided="true"
+       sodipodi:sides="6"
+       sodipodi:cx="61.574867"
+       sodipodi:cy="103.99491"
+       sodipodi:r1="25.000006"
+       sodipodi:r2="22.404818"
+       sodipodi:arg1="-1.5707963"
+       sodipodi:arg2="-1.0471974"
+       inkscape:rounded="0.77946499"
+       inkscape:randomized="0"
+       d="m 61.574868,78.994905 c 19.486629,10e-7 11.907325,-4.375912 21.65064,12.500004 9.743314,16.875911 9.743314,8.12409 -1e-6,25.000001 -9.743315,16.87592 -2.164011,12.50001 -21.65064,12.50001 -19.486629,0 -11.907326,4.37591 -21.65064,-12.50001 -9.743314,-16.875912 -9.743314,-8.12409 0,-25.000002 9.743315,-16.875916 2.164012,-12.500003 21.650641,-12.500003 z"
+       transform="matrix(1.9704344,0,0,1.8525167,-28.510585,-40.025402)" />
+    <path
+       sodipodi:type="star"
+       style="fill:#ff9701;fill-opacity:1;stroke:#12101c;stroke-width:5;stroke-linejoin:miter;stroke-dasharray:none;stroke-opacity:1"
+       id="path6-81-5-6"
+       inkscape:flatsided="true"
+       sodipodi:sides="6"
+       sodipodi:cx="61.574867"
+       sodipodi:cy="103.99491"
+       sodipodi:r1="25.000006"
+       sodipodi:r2="22.404818"
+       sodipodi:arg1="-1.5707963"
+       sodipodi:arg2="-1.0471974"
+       inkscape:rounded="0.77946499"
+       inkscape:randomized="0"
+       d="m 61.574868,78.994905 c 19.486629,10e-7 11.907325,-4.375912 21.65064,12.500004 9.743314,16.875921 9.743314,8.12409 -1e-6,25.000001 -9.743315,16.87592 -2.164011,12.50001 -21.65064,12.50001 -19.48663,0 -11.907326,4.37591 -21.65064,-12.50001 -9.743314,-16.875913 -9.743315,-8.12409 10e-7,-25.000002 9.743315,-16.875916 2.164011,-12.500003 21.65064,-12.500003 z"
+       transform="matrix(1.9704344,0,0,1.8525167,56.811738,-86.338327)" />
+  </g>
+</svg>

web/src/api/types.ts

@@ -352,6 +352,35 @@ export interface UpdateSchemaValueRequest {
   description: string;
 }
 
+// Admin settings — module discovery
+export interface ModuleInfo {
+  enabled: boolean;
+  required: boolean;
+  name: string;
+  version?: string;
+  depends_on?: string[];
+  config?: Record<string, unknown>;
+}
+
+export interface ModulesResponse {
+  modules: Record<string, ModuleInfo>;
+  server: { version: string; read_only: boolean };
+}
+
+// Admin settings — config management
+export type AdminSettingsResponse = Record<string, Record<string, unknown>>;
+
+export interface UpdateSettingsResponse {
+  updated: string[];
+  restart_required: boolean;
+}
+
+export interface TestConnectivityResponse {
+  success: boolean;
+  message: string;
+  latency_ms: number;
+}
+
 // Revision comparison
 export interface RevisionComparison {
   from: number;

web/src/components/AppShell.tsx

@@ -1,24 +1,67 @@
-import { NavLink, Outlet } from "react-router-dom";
+import { useCallback, useEffect, useState } from "react";
+import { Outlet } from "react-router-dom";
 import { useAuth } from "../hooks/useAuth";
 import { useDensity } from "../hooks/useDensity";
-
-const navLinks = [
-  { to: "/", label: "Items" },
-  { to: "/projects", label: "Projects" },
-  { to: "/schemas", label: "Schemas" },
-  { to: "/audit", label: "Audit" },
-  { to: "/settings", label: "Settings" },
-];
-
-const roleBadgeStyle: Record<string, React.CSSProperties> = {
-  admin: { background: "rgba(203,166,247,0.2)", color: "var(--ctp-mauve)" },
-  editor: { background: "rgba(137,180,250,0.2)", color: "var(--ctp-blue)" },
-  viewer: { background: "rgba(148,226,213,0.2)", color: "var(--ctp-teal)" },
-};
+import { useModules } from "../hooks/useModules";
+import { useSSE } from "../hooks/useSSE";
+import { Sidebar } from "./Sidebar";
 
 export function AppShell() {
   const { user, loading, logout } = useAuth();
   const [density, toggleDensity] = useDensity();
+  const { modules, refresh: refreshModules } = useModules();
+  const { on } = useSSE();
+  const [toast, setToast] = useState<string | null>(null);
+
+  // Listen for settings.changed SSE events
+  useEffect(() => {
+    return on("settings.changed", (raw) => {
+      try {
+        const data = JSON.parse(raw) as {
+          module: string;
+          changed_keys: string[];
+          updated_by: string;
+        };
+        refreshModules();
+        if (data.updated_by !== user?.username) {
+          setToast(`Settings updated by ${data.updated_by}`);
+        }
+      } catch {
+        // ignore malformed events
+      }
+    });
+  }, [on, refreshModules, user?.username]);
+
+  // Auto-dismiss toast
+  useEffect(() => {
+    if (!toast) return;
+    const timer = setTimeout(() => setToast(null), 5000);
+    return () => clearTimeout(timer);
+  }, [toast]);
+
+  const [sidebarOpen, setSidebarOpen] = useState(() => {
+    return localStorage.getItem("silo-sidebar") !== "closed";
+  });
+
+  const toggleSidebar = useCallback(() => {
+    setSidebarOpen((prev) => {
+      const next = !prev;
+      localStorage.setItem("silo-sidebar", next ? "open" : "closed");
+      return next;
+    });
+  }, []);
+
+  // Ctrl+J to toggle sidebar
+  useEffect(() => {
+    const handler = (e: KeyboardEvent) => {
+      if (e.ctrlKey && e.key === "j") {
+        e.preventDefault();
+        toggleSidebar();
+      }
+    };
+    window.addEventListener("keydown", handler);
+    return () => window.removeEventListener("keydown", handler);
+  }, [toggleSidebar]);
 
   if (loading) {
     return (
@@ -36,119 +79,40 @@ export function AppShell() {
   }
 
   return (
-    <div style={{ display: "flex", flexDirection: "column", height: "100vh" }}>
-      <header
-        style={{
-          backgroundColor: "var(--ctp-mantle)",
-          borderBottom: "1px solid var(--ctp-surface0)",
-          padding: "var(--d-header-py) var(--d-header-px)",
-          display: "flex",
-          alignItems: "center",
-          justifyContent: "space-between",
-          flexShrink: 0,
-        }}
-      >
-        <h1
-          style={{
-            fontSize: "var(--d-header-logo)",
-            fontWeight: 600,
-            color: "var(--ctp-mauve)",
-          }}
-        >
-          Silo
-        </h1>
-
-        <nav style={{ display: "flex", gap: "var(--d-nav-gap)" }}>
-          {navLinks.map((link) => (
-            <NavLink
-              key={link.to}
-              to={link.to}
-              end={link.to === "/"}
-              style={({ isActive }) => ({
-                color: isActive ? "var(--ctp-mauve)" : "var(--ctp-subtext1)",
-                backgroundColor: isActive
-                  ? "var(--ctp-surface1)"
-                  : "transparent",
-                fontWeight: 500,
-                padding: "var(--d-nav-py) var(--d-nav-px)",
-                borderRadius: "var(--d-nav-radius)",
-                textDecoration: "none",
-                transition: "all 0.15s ease",
-              })}
-            >
-              {link.label}
-            </NavLink>
-          ))}
-        </nav>
-
-        {user && (
-          <div
-            style={{
-              display: "flex",
-              alignItems: "center",
-              gap: "var(--d-user-gap)",
-            }}
-          >
-            <span
-              style={{
-                color: "var(--ctp-subtext1)",
-                fontSize: "var(--d-user-font)",
-              }}
-            >
-              {user.display_name}
-            </span>
-            <span
-              style={{
-                display: "inline-block",
-                padding: "0.25rem 0.5rem",
-                borderRadius: "1rem",
-                fontSize: "0.75rem",
-                fontWeight: 600,
-                ...roleBadgeStyle[user.role],
-              }}
-            >
-              {user.role}
-            </span>
-            <button
-              onClick={toggleDensity}
-              title={`Switch to ${density === "comfortable" ? "compact" : "comfortable"} view`}
-              style={{
-                padding: "0.25rem 0.5rem",
-                fontSize: "var(--font-sm)",
-                borderRadius: "0.25rem",
-                cursor: "pointer",
-                border: "1px solid var(--ctp-surface1)",
-                background: "var(--ctp-surface0)",
-                color: "var(--ctp-subtext1)",
-                fontFamily: "'JetBrains Mono', monospace",
-                letterSpacing: "0.05em",
-              }}
-            >
-              {density === "comfortable" ? "COM" : "CMP"}
-            </button>
-            <button
-              onClick={logout}
-              style={{
-                padding: "0.25rem 0.75rem",
-                fontSize: "var(--font-table)",
-                borderRadius: "0.5rem",
-                cursor: "pointer",
-                border: "none",
-                background: "var(--ctp-surface1)",
-                color: "var(--ctp-subtext1)",
-              }}
-            >
-              Logout
-            </button>
-          </div>
-        )}
-      </header>
-
-      <main
-        style={{ flex: 1, padding: "1rem 1rem 0 1rem", overflow: "hidden" }}
-      >
+    <div style={{ display: "flex", height: "100vh" }}>
+      <Sidebar
+        open={sidebarOpen}
+        onToggle={toggleSidebar}
+        modules={modules}
+        user={user}
+        density={density}
+        onToggleDensity={toggleDensity}
+        onLogout={logout}
+      />
+      <main style={{ flex: 1, overflow: "auto", padding: "1rem" }}>
         <Outlet />
       </main>
+      {toast && (
+        <div
+          style={{
+            position: "fixed",
+            bottom: "1rem",
+            right: "1rem",
+            padding: "0.5rem 1rem",
+            backgroundColor: "var(--ctp-surface1)",
+            color: "var(--ctp-text)",
+            borderRadius: "0.5rem",
+            fontSize: "var(--font-body)",
+            border: "1px solid var(--ctp-surface2)",
+            boxShadow: "0 2px 8px rgba(0,0,0,0.3)",
+            zIndex: 1000,
+            cursor: "pointer",
+          }}
+          onClick={() => setToast(null)}
+        >
+          {toast}
+        </div>
+      )}
     </div>
   );
 }

web/src/components/Sidebar.tsx

@@ -0,0 +1,335 @@
+import { useEffect, useRef, useState, useCallback } from "react";
+import { NavLink, useNavigate } from "react-router-dom";
+import {
+  Package,
+  FolderKanban,
+  FileCode2,
+  ClipboardCheck,
+  Settings2,
+  ChevronLeft,
+  ChevronRight,
+  LogOut,
+} from "lucide-react";
+import type { ModuleInfo } from "../api/types";
+
+interface NavItem {
+  moduleId: string | null;
+  path: string;
+  label: string;
+  icon: React.ComponentType<{ size?: number }>;
+}
+
+const allNavItems: NavItem[] = [
+  { moduleId: "core", path: "/", label: "Items", icon: Package },
+  {
+    moduleId: "projects",
+    path: "/projects",
+    label: "Projects",
+    icon: FolderKanban,
+  },
+  { moduleId: "schemas", path: "/schemas", label: "Schemas", icon: FileCode2 },
+  { moduleId: "audit", path: "/audit", label: "Audit", icon: ClipboardCheck },
+  { moduleId: null, path: "/settings", label: "Settings", icon: Settings2 },
+];
+
+interface SidebarProps {
+  open: boolean;
+  onToggle: () => void;
+  modules: Record<string, ModuleInfo>;
+  user: { display_name: string; role: string } | null;
+  density: string;
+  onToggleDensity: () => void;
+  onLogout: () => void;
+}
+
+const roleBadgeStyle: Record<string, React.CSSProperties> = {
+  admin: { background: "rgba(203,166,247,0.2)", color: "var(--ctp-mauve)" },
+  editor: { background: "rgba(137,180,250,0.2)", color: "var(--ctp-blue)" },
+  viewer: { background: "rgba(148,226,213,0.2)", color: "var(--ctp-teal)" },
+};
+
+export function Sidebar({
+  open,
+  onToggle,
+  modules,
+  user,
+  density,
+  onToggleDensity,
+  onLogout,
+}: SidebarProps) {
+  const navigate = useNavigate();
+  const [focusIndex, setFocusIndex] = useState(-1);
+  const navRefs = useRef<(HTMLAnchorElement | null)[]>([]);
+
+  const visibleItems = allNavItems.filter(
+    (item) => item.moduleId === null || modules[item.moduleId]?.enabled,
+  );
+
+  // Focus the item at focusIndex when it changes
+  useEffect(() => {
+    if (focusIndex >= 0 && focusIndex < navRefs.current.length) {
+      navRefs.current[focusIndex]?.focus();
+    }
+  }, [focusIndex]);
+
+  // Reset focus when sidebar closes
+  useEffect(() => {
+    if (!open) setFocusIndex(-1);
+  }, [open]);
+
+  const handleKeyDown = useCallback(
+    (e: React.KeyboardEvent) => {
+      if (!open) return;
+
+      switch (e.key) {
+        case "ArrowDown":
+          e.preventDefault();
+          setFocusIndex((i) => (i + 1) % visibleItems.length);
+          break;
+        case "ArrowUp":
+          e.preventDefault();
+          setFocusIndex(
+            (i) => (i - 1 + visibleItems.length) % visibleItems.length,
+          );
+          break;
+        case "Enter": {
+          const target = visibleItems[focusIndex];
+          if (focusIndex >= 0 && target) {
+            e.preventDefault();
+            navigate(target.path);
+          }
+          break;
+        }
+        case "Escape":
+          e.preventDefault();
+          onToggle();
+          break;
+      }
+    },
+    [open, focusIndex, visibleItems, navigate, onToggle],
+  );
+
+  return (
+    <nav
+      onKeyDown={handleKeyDown}
+      style={{
+        width: open ? "var(--d-sidebar-w)" : "var(--d-sidebar-collapsed)",
+        minWidth: open ? "var(--d-sidebar-w)" : "var(--d-sidebar-collapsed)",
+        height: "100vh",
+        backgroundColor: "var(--ctp-mantle)",
+        borderRight: "1px solid var(--ctp-surface0)",
+        display: "flex",
+        flexDirection: "column",
+        transition: "width 0.2s ease, min-width 0.2s ease",
+        overflow: "hidden",
+        flexShrink: 0,
+      }}
+    >
+      {/* Logo */}
+      <div
+        style={{
+          padding: open ? "0.75rem 1rem" : "0.75rem 0",
+          display: "flex",
+          alignItems: "center",
+          justifyContent: open ? "flex-start" : "center",
+          borderBottom: "1px solid var(--ctp-surface0)",
+          minHeight: 44,
+        }}
+      >
+        <span
+          style={{
+            fontSize: "1.25rem",
+            fontWeight: 700,
+            color: "var(--ctp-mauve)",
+            whiteSpace: "nowrap",
+          }}
+        >
+          {open ? "Silo" : "S"}
+        </span>
+      </div>
+
+      {/* Nav items */}
+      <div
+        style={{
+          flex: 1,
+          padding: "0.5rem 0.5rem",
+          display: "flex",
+          flexDirection: "column",
+          gap: "2px",
+        }}
+      >
+        {visibleItems.map((item, i) => (
+          <NavLink
+            key={item.path}
+            to={item.path}
+            end={item.path === "/"}
+            ref={(el) => {
+              navRefs.current[i] = el;
+            }}
+            title={open ? undefined : item.label}
+            style={({ isActive }) => ({
+              display: "flex",
+              alignItems: "center",
+              gap: "0.75rem",
+              padding: "var(--d-nav-py) var(--d-nav-px)",
+              borderRadius: "var(--d-nav-radius)",
+              textDecoration: "none",
+              color: isActive ? "var(--ctp-mauve)" : "var(--ctp-subtext1)",
+              backgroundColor: isActive ? "var(--ctp-surface1)" : "transparent",
+              fontWeight: 500,
+              fontSize: "var(--font-body)",
+              whiteSpace: "nowrap",
+              transition: "background-color 0.15s ease, color 0.15s ease",
+              outline: focusIndex === i ? "1px solid var(--ctp-mauve)" : "none",
+              outlineOffset: -1,
+              justifyContent: open ? "flex-start" : "center",
+            })}
+            onMouseEnter={(e) => {
+              const target = e.currentTarget;
+              if (
+                !target.style.backgroundColor ||
+                target.style.backgroundColor === "transparent"
+              ) {
+                target.style.backgroundColor = "var(--ctp-surface0)";
+              }
+            }}
+            onMouseLeave={(e) => {
+              const target = e.currentTarget;
+              // Let NavLink's isActive styling handle active items
+              const isActive = target.getAttribute("aria-current") === "page";
+              if (!isActive) {
+                target.style.backgroundColor = "transparent";
+              }
+            }}
+          >
+            <item.icon size={16} />
+            {open && <span>{item.label}</span>}
+          </NavLink>
+        ))}
+      </div>
+
+      {/* Bottom section */}
+      <div
+        style={{
+          borderTop: "1px solid var(--ctp-surface0)",
+          padding: "0.5rem",
+          display: "flex",
+          flexDirection: "column",
+          gap: "4px",
+        }}
+      >
+        {/* Toggle sidebar */}
+        <button
+          onClick={onToggle}
+          title={open ? "Collapse sidebar (Ctrl+J)" : "Expand sidebar (Ctrl+J)"}
+          style={{
+            ...btnStyle,
+            justifyContent: open ? "flex-start" : "center",
+          }}
+        >
+          {open ? <ChevronLeft size={16} /> : <ChevronRight size={16} />}
+          {open && <span>Collapse</span>}
+        </button>
+
+        {/* Density toggle */}
+        <button
+          onClick={onToggleDensity}
+          title={`Switch to ${density === "comfortable" ? "compact" : "comfortable"} view`}
+          style={{
+            ...btnStyle,
+            justifyContent: open ? "flex-start" : "center",
+            fontFamily: "'JetBrains Mono', monospace",
+            letterSpacing: "0.05em",
+          }}
+        >
+          <span
+            style={{
+              width: 16,
+              textAlign: "center",
+              fontSize: "var(--font-sm)",
+            }}
+          >
+            {density === "comfortable" ? "CO" : "CP"}
+          </span>
+          {open && (
+            <span>{density === "comfortable" ? "Comfortable" : "Compact"}</span>
+          )}
+        </button>
+
+        {/* User */}
+        {user && (
+          <div
+            style={{
+              display: "flex",
+              alignItems: "center",
+              gap: "0.5rem",
+              padding: "0.375rem var(--d-nav-px)",
+              justifyContent: open ? "flex-start" : "center",
+            }}
+          >
+            <span
+              style={{
+                display: "inline-flex",
+                alignItems: "center",
+                justifyContent: "center",
+                width: 20,
+                height: 20,
+                borderRadius: "50%",
+                fontSize: "var(--font-xs)",
+                fontWeight: 600,
+                flexShrink: 0,
+                ...roleBadgeStyle[user.role],
+              }}
+            >
+              {user.role.charAt(0).toUpperCase()}
+            </span>
+            {open && (
+              <span
+                style={{
+                  color: "var(--ctp-subtext1)",
+                  fontSize: "var(--font-body)",
+                  overflow: "hidden",
+                  textOverflow: "ellipsis",
+                  whiteSpace: "nowrap",
+                }}
+              >
+                {user.display_name}
+              </span>
+            )}
+          </div>
+        )}
+
+        {/* Logout */}
+        <button
+          onClick={onLogout}
+          title="Logout"
+          style={{
+            ...btnStyle,
+            justifyContent: open ? "flex-start" : "center",
+            color: "var(--ctp-overlay1)",
+          }}
+        >
+          <LogOut size={16} />
+          {open && <span>Logout</span>}
+        </button>
+      </div>
+    </nav>
+  );
+}
+
+const btnStyle: React.CSSProperties = {
+  display: "flex",
+  alignItems: "center",
+  gap: "0.75rem",
+  padding: "var(--d-nav-py) var(--d-nav-px)",
+  borderRadius: "var(--d-nav-radius)",
+  border: "none",
+  background: "transparent",
+  color: "var(--ctp-subtext1)",
+  fontSize: "var(--font-body)",
+  fontWeight: 500,
+  cursor: "pointer",
+  whiteSpace: "nowrap",
+  width: "100%",
+  textAlign: "left",
+};

web/src/components/items/CreateItemPane.tsx

@@ -1,5 +1,5 @@
 import { useState, useCallback } from "react";
-import { get, post, put } from "../../api/client";
+import { get, post } from "../../api/client";
 import type {
   Project,
   FormFieldDescriptor,
@@ -95,34 +95,9 @@ export function CreateItemPane({ onCreated, onCancel }: CreateItemPaneProps) {
     [],
   );
 
-  const handleFilesAdded = useCallback(
-    (files: PendingAttachment[]) => {
-      const startIdx = attachments.length;
-      setAttachments((prev) => [...prev, ...files]);
-
-      files.forEach((f, i) => {
-        const idx = startIdx + i;
-        setAttachments((prev) =>
-          prev.map((a, j) =>
-            j === idx ? { ...a, uploadStatus: "uploading" } : a,
-          ),
-        );
-
-        upload(f.file, (progress) => {
-          setAttachments((prev) =>
-            prev.map((a, j) =>
-              j === idx ? { ...a, uploadProgress: progress } : a,
-            ),
-          );
-        }).then((result) => {
-          setAttachments((prev) =>
-            prev.map((a, j) => (j === idx ? result : a)),
-          );
-        });
-      });
-    },
-    [attachments.length, upload],
-  );
+  const handleFilesAdded = useCallback((files: PendingAttachment[]) => {
+    setAttachments((prev) => [...prev, ...files]);
+  }, []);
 
   const handleFileRemoved = useCallback((index: number) => {
     setAttachments((prev) => prev.filter((_, i) => i !== index));
@@ -136,24 +111,15 @@ export function CreateItemPane({ onCreated, onCancel }: CreateItemPaneProps) {
       const file = input.files?.[0];
       if (!file) return;
 
-      const pending: PendingAttachment = {
+      setThumbnailFile({
         file,
         objectKey: "",
         uploadProgress: 0,
-        uploadStatus: "uploading",
-      };
-      setThumbnailFile(pending);
-
-      upload(file, (progress) => {
-        setThumbnailFile((prev) =>
-          prev ? { ...prev, uploadProgress: progress } : null,
-        );
-      }).then((result) => {
-        setThumbnailFile(result);
+        uploadStatus: "pending",
       });
     };
     input.click();
-  }, [upload]);
+  }, []);
 
   const handleSubmit = async () => {
     if (!category) {
@@ -188,33 +154,24 @@ export function CreateItemPane({ onCreated, onCancel }: CreateItemPaneProps) {
       });
 
       const pn = result.part_number;
+      const encodedPN = encodeURIComponent(pn);
 
-      // Associate uploaded attachments.
-      const completed = attachments.filter(
-        (a) => a.uploadStatus === "complete" && a.objectKey,
-      );
-      for (const att of completed) {
+      // Upload attachments via direct multipart POST.
+      for (const att of attachments) {
         try {
-          await post(`/api/items/${encodeURIComponent(pn)}/files`, {
-            object_key: att.objectKey,
-            filename: att.file.name,
-            content_type: att.file.type || "application/octet-stream",
-            size: att.file.size,
-          });
+          await upload(att.file, `/api/items/${encodedPN}/files/upload`);
         } catch {
-          // File association failure is non-blocking.
+          // File upload failure is non-blocking.
         }
       }
 
-      // Set thumbnail.
-      if (
-        thumbnailFile?.uploadStatus === "complete" &&
-        thumbnailFile.objectKey
-      ) {
+      // Upload thumbnail via direct multipart POST.
+      if (thumbnailFile) {
         try {
-          await put(`/api/items/${encodeURIComponent(pn)}/thumbnail`, {
-            object_key: thumbnailFile.objectKey,
-          });
+          await upload(
+            thumbnailFile.file,
+            `/api/items/${encodedPN}/thumbnail/upload`,
+          );
         } catch {
           // Thumbnail failure is non-blocking.
         }
@@ -392,21 +349,12 @@ export function CreateItemPane({ onCreated, onCancel }: CreateItemPaneProps) {
                 backgroundColor: "var(--ctp-mantle)",
               }}
             >
-              {thumbnailFile?.uploadStatus === "complete" ? (
+              {thumbnailFile ? (
                 <img
                   src={URL.createObjectURL(thumbnailFile.file)}
                   alt="Thumbnail preview"
                   style={{ width: "100%", height: "100%", objectFit: "cover" }}
                 />
-              ) : thumbnailFile?.uploadStatus === "uploading" ? (
-                <span
-                  style={{
-                    fontSize: "var(--font-table)",
-                    color: "var(--ctp-subtext0)",
-                  }}
-                >
-                  Uploading... {thumbnailFile.uploadProgress}%
-                </span>
               ) : (
                 <span
                   style={{
@@ -414,7 +362,7 @@ export function CreateItemPane({ onCreated, onCancel }: CreateItemPaneProps) {
                     color: "var(--ctp-subtext0)",
                   }}
                 >
-                  Click to upload
+                  Click to select
                 </span>
               )}
             </div>

web/src/components/items/ItemDetail.tsx

@@ -1,5 +1,5 @@
 import { useState, useEffect } from "react";
-import { X } from "lucide-react";
+import { X, Pencil, Trash2 } from "lucide-react";
 import { get } from "../../api/client";
 import type { Item } from "../../api/types";
 import { MainTab } from "./MainTab";
@@ -114,22 +114,6 @@ export function ItemDetail({
           {item.item_type}
         </span>
         <span style={{ flex: 1 }} />
-        {isEditor && (
-          <>
-            <button
-              onClick={() => onEdit(item.part_number)}
-              style={headerBtnStyle}
-            >
-              Edit
-            </button>
-            <button
-              onClick={() => onDelete(item.part_number)}
-              style={{ ...headerBtnStyle, color: "var(--ctp-red)" }}
-            >
-              Delete
-            </button>
-          </>
-        )}
         <button
           onClick={onClose}
           style={{
@@ -142,11 +126,11 @@ export function ItemDetail({
         </button>
       </div>
 
-      {/* Tabs */}
+      {/* Tabs + actions */}
       <div
         style={{
           display: "flex",
-          gap: "0",
+          alignItems: "center",
           borderBottom: "1px solid var(--ctp-surface1)",
           backgroundColor: "var(--ctp-mantle)",
           flexShrink: 0,
@@ -175,6 +159,33 @@ export function ItemDetail({
             {tab.label}
           </button>
         ))}
+        <span style={{ flex: 1 }} />
+        {isEditor && (
+          <div
+            style={{ display: "flex", gap: "0.25rem", paddingRight: "0.5rem" }}
+          >
+            <button
+              onClick={() => onEdit(item.part_number)}
+              style={{
+                ...tabActionBtnStyle,
+                color: "var(--ctp-subtext1)",
+              }}
+              title="Edit item"
+            >
+              <Pencil size={13} /> Edit
+            </button>
+            <button
+              onClick={() => onDelete(item.part_number)}
+              style={{
+                ...tabActionBtnStyle,
+                color: "var(--ctp-red)",
+              }}
+              title="Delete item"
+            >
+              <Trash2 size={13} /> Delete
+            </button>
+          </div>
+        )}
       </div>
 
       {/* Tab Content */}
@@ -207,3 +218,15 @@ const headerBtnStyle: React.CSSProperties = {
   fontSize: "var(--font-table)",
   padding: "0.25rem 0.5rem",
 };
+
+const tabActionBtnStyle: React.CSSProperties = {
+  display: "inline-flex",
+  alignItems: "center",
+  gap: "0.25rem",
+  background: "none",
+  border: "none",
+  cursor: "pointer",
+  fontSize: "var(--font-table)",
+  padding: "0.25rem 0.5rem",
+  borderRadius: "0.25rem",
+};

web/src/components/settings/AdminModules.tsx

@@ -0,0 +1,180 @@
+import { useEffect, useState } from "react";
+import { get } from "../../api/client";
+import type {
+  ModuleInfo,
+  ModulesResponse,
+  AdminSettingsResponse,
+  UpdateSettingsResponse,
+} from "../../api/types";
+import { ModuleCard } from "./ModuleCard";
+
+const infraModules = ["core", "schemas", "database", "storage"];
+const featureModules = [
+  "auth",
+  "projects",
+  "audit",
+  "freecad",
+  "odoo",
+  "jobs",
+  "dag",
+];
+
+export function AdminModules() {
+  const [modules, setModules] = useState<Record<string, ModuleInfo> | null>(
+    null,
+  );
+  const [settings, setSettings] = useState<AdminSettingsResponse | null>(null);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+  const [restartRequired, setRestartRequired] = useState(false);
+
+  useEffect(() => {
+    Promise.all([
+      get<ModulesResponse>("/api/modules"),
+      get<AdminSettingsResponse>("/api/admin/settings"),
+    ])
+      .then(([modsResp, settingsResp]) => {
+        setModules(modsResp.modules);
+        setSettings(settingsResp);
+      })
+      .catch((e) =>
+        setError(e instanceof Error ? e.message : "Failed to load settings"),
+      )
+      .finally(() => setLoading(false));
+  }, []);
+
+  const handleSaved = (moduleId: string, result: UpdateSettingsResponse) => {
+    if (result.restart_required) setRestartRequired(true);
+    // Refresh the single module's settings
+    get<Record<string, unknown>>(`/api/admin/settings/${moduleId}`)
+      .then((updated) =>
+        setSettings((prev) => (prev ? { ...prev, [moduleId]: updated } : prev)),
+      )
+      .catch(() => {});
+  };
+
+  const handleToggled = (moduleId: string, enabled: boolean) => {
+    setModules((prev) => {
+      if (!prev || !prev[moduleId]) return prev;
+      const updated: Record<string, ModuleInfo> = {
+        ...prev,
+        [moduleId]: { ...prev[moduleId], enabled },
+      };
+      return updated;
+    });
+  };
+
+  if (loading) {
+    return (
+      <div style={sectionStyle}>
+        <h3 style={sectionTitleStyle}>Module Configuration</h3>
+        <p style={{ color: "var(--ctp-overlay0)" }}>Loading modules...</p>
+      </div>
+    );
+  }
+
+  if (error) {
+    return (
+      <div style={sectionStyle}>
+        <h3 style={sectionTitleStyle}>Module Configuration</h3>
+        <p style={{ color: "var(--ctp-red)", fontSize: "var(--font-body)" }}>
+          {error}
+        </p>
+      </div>
+    );
+  }
+
+  if (!modules || !settings) return null;
+
+  const renderGroup = (title: string, ids: string[]) => {
+    const available = ids.filter((id) => modules[id]);
+    if (available.length === 0) return null;
+    return (
+      <div style={{ marginBottom: "1.25rem" }}>
+        <div style={groupTitleStyle}>{title}</div>
+        {available.map((id) => {
+          const meta = modules[id];
+          if (!meta) return null;
+          return (
+            <ModuleCard
+              key={id}
+              moduleId={id}
+              meta={meta}
+              settings={settings[id] ?? {}}
+              allModules={modules}
+              onSaved={handleSaved}
+              onToggled={handleToggled}
+            />
+          );
+        })}
+      </div>
+    );
+  };
+
+  return (
+    <div style={sectionStyle}>
+      <h3 style={sectionTitleStyle}>Module Configuration</h3>
+
+      {restartRequired && (
+        <div style={restartBannerStyle}>
+          <span style={{ fontWeight: 600 }}>Restart required</span>
+          <span>Some changes require a server restart to take effect.</span>
+          <button
+            onClick={() => setRestartRequired(false)}
+            style={dismissBtnStyle}
+          >
+            Dismiss
+          </button>
+        </div>
+      )}
+
+      {renderGroup("Infrastructure", infraModules)}
+      {renderGroup("Features", featureModules)}
+    </div>
+  );
+}
+
+// --- Styles ---
+
+const sectionStyle: React.CSSProperties = {
+  marginTop: "0.5rem",
+};
+
+const sectionTitleStyle: React.CSSProperties = {
+  marginBottom: "1rem",
+  fontSize: "var(--font-title)",
+};
+
+const groupTitleStyle: React.CSSProperties = {
+  fontSize: "0.7rem",
+  fontWeight: 600,
+  textTransform: "uppercase",
+  letterSpacing: "0.08em",
+  color: "var(--ctp-overlay1)",
+  marginBottom: "0.5rem",
+};
+
+const restartBannerStyle: React.CSSProperties = {
+  display: "flex",
+  gap: "0.75rem",
+  alignItems: "center",
+  padding: "0.75rem 1rem",
+  marginBottom: "1rem",
+  borderRadius: "0.75rem",
+  background: "rgba(249, 226, 175, 0.1)",
+  border: "1px solid rgba(249, 226, 175, 0.3)",
+  color: "var(--ctp-yellow)",
+  fontSize: "var(--font-body)",
+};
+
+const dismissBtnStyle: React.CSSProperties = {
+  marginLeft: "auto",
+  padding: "0.25rem 0.5rem",
+  borderRadius: "0.25rem",
+  border: "none",
+  background: "rgba(249, 226, 175, 0.15)",
+  color: "var(--ctp-yellow)",
+  cursor: "pointer",
+  fontSize: "0.7rem",
+  fontWeight: 500,
+};

web/src/components/settings/ModuleCard.tsx

@@ -0,0 +1,878 @@
+import { useState } from "react";
+import { put, post } from "../../api/client";
+import type {
+  ModuleInfo,
+  UpdateSettingsResponse,
+  TestConnectivityResponse,
+} from "../../api/types";
+
+interface ModuleCardProps {
+  moduleId: string;
+  meta: ModuleInfo;
+  settings: Record<string, unknown>;
+  allModules: Record<string, ModuleInfo>;
+  onSaved: (moduleId: string, result: UpdateSettingsResponse) => void;
+  onToggled: (moduleId: string, enabled: boolean) => void;
+}
+
+const testableModules = new Set(["database", "storage"]);
+
+export function ModuleCard({
+  moduleId,
+  meta,
+  settings,
+  allModules,
+  onSaved,
+  onToggled,
+}: ModuleCardProps) {
+  const [expanded, setExpanded] = useState(false);
+  const [enabled, setEnabled] = useState(meta.enabled);
+  const [toggling, setToggling] = useState(false);
+  const [toggleError, setToggleError] = useState<string | null>(null);
+  const [saving, setSaving] = useState(false);
+  const [saveError, setSaveError] = useState<string | null>(null);
+  const [saveSuccess, setSaveSuccess] = useState(false);
+  const [testing, setTesting] = useState(false);
+  const [testResult, setTestResult] = useState<TestConnectivityResponse | null>(
+    null,
+  );
+  const [edits, setEdits] = useState<Record<string, unknown>>({});
+
+  const hasEdits = Object.keys(edits).length > 0;
+  const isTestable = testableModules.has(moduleId);
+  const hasFields = !["projects", "audit", "dag"].includes(moduleId);
+  const deps = meta.depends_on ?? [];
+  const status = settings.status as string | undefined;
+
+  const handleToggle = async () => {
+    const next = !enabled;
+    setToggling(true);
+    setToggleError(null);
+    try {
+      const result = await put<UpdateSettingsResponse>(
+        `/api/admin/settings/${moduleId}`,
+        { enabled: next },
+      );
+      setEnabled(next);
+      onToggled(moduleId, next);
+      onSaved(moduleId, result);
+    } catch (e) {
+      setToggleError(e instanceof Error ? e.message : "Toggle failed");
+    } finally {
+      setToggling(false);
+    }
+  };
+
+  const handleSave = async () => {
+    setSaving(true);
+    setSaveError(null);
+    setSaveSuccess(false);
+    try {
+      const result = await put<UpdateSettingsResponse>(
+        `/api/admin/settings/${moduleId}`,
+        edits,
+      );
+      setEdits({});
+      setSaveSuccess(true);
+      onSaved(moduleId, result);
+      setTimeout(() => setSaveSuccess(false), 3000);
+    } catch (e) {
+      setSaveError(e instanceof Error ? e.message : "Save failed");
+    } finally {
+      setSaving(false);
+    }
+  };
+
+  const handleTest = async () => {
+    setTesting(true);
+    setTestResult(null);
+    try {
+      const result = await post<TestConnectivityResponse>(
+        `/api/admin/settings/${moduleId}/test`,
+      );
+      setTestResult(result);
+    } catch (e) {
+      setTestResult({
+        success: false,
+        message: e instanceof Error ? e.message : "Test failed",
+        latency_ms: 0,
+      });
+    } finally {
+      setTesting(false);
+    }
+  };
+
+  const setField = (key: string, value: unknown) => {
+    setEdits((prev) => ({ ...prev, [key]: value }));
+    setSaveSuccess(false);
+  };
+
+  const getFieldValue = (key: string): unknown => {
+    if (key in edits) return edits[key];
+    return settings[key];
+  };
+
+  const statusBadge = () => {
+    if (!enabled && !meta.required)
+      return <span style={badgeStyles.disabled}>Disabled</span>;
+    if (status === "unavailable")
+      return <span style={badgeStyles.error}>Error</span>;
+    return <span style={badgeStyles.active}>Active</span>;
+  };
+
+  return (
+    <div style={cardStyle}>
+      {/* Header */}
+      <div
+        style={headerStyle}
+        onClick={() => hasFields && setExpanded(!expanded)}
+      >
+        <div style={{ display: "flex", alignItems: "center", gap: "0.75rem" }}>
+          {!meta.required && (
+            <button
+              onClick={(e) => {
+                e.stopPropagation();
+                handleToggle();
+              }}
+              disabled={toggling}
+              style={{
+                ...toggleBtnStyle,
+                backgroundColor: enabled
+                  ? "var(--ctp-green)"
+                  : "var(--ctp-surface2)",
+              }}
+              title={enabled ? "Disable module" : "Enable module"}
+            >
+              <span
+                style={{
+                  ...toggleKnobStyle,
+                  transform: enabled ? "translateX(14px)" : "translateX(0)",
+                }}
+              />
+            </button>
+          )}
+          <span style={{ fontWeight: 600, fontSize: "var(--font-title)" }}>
+            {meta.name}
+          </span>
+          {statusBadge()}
+        </div>
+        {hasFields && (
+          <span
+            style={{
+              color: "var(--ctp-overlay1)",
+              fontSize: "0.75rem",
+              transition: "transform 0.15s ease",
+              transform: expanded ? "rotate(180deg)" : "rotate(0)",
+              cursor: "pointer",
+              userSelect: "none",
+            }}
+          >
+            ▼
+          </span>
+        )}
+      </div>
+
+      {/* Toggle error */}
+      {toggleError && (
+        <div style={{ ...errorStyle, margin: "0.5rem 1.5rem 0" }}>
+          {toggleError}
+        </div>
+      )}
+
+      {/* Dependencies note */}
+      {deps.length > 0 && expanded && (
+        <div style={depNoteStyle}>
+          Requires: {deps.map((d) => allModules[d]?.name ?? d).join(", ")}
+        </div>
+      )}
+
+      {/* Body */}
+      {expanded && hasFields && (
+        <div style={bodyStyle}>
+          {renderModuleFields(moduleId, settings, getFieldValue, setField)}
+
+          {/* Footer */}
+          <div style={footerStyle}>
+            <div
+              style={{ display: "flex", gap: "0.5rem", alignItems: "center" }}
+            >
+              {hasEdits && (
+                <button
+                  onClick={handleSave}
+                  disabled={saving}
+                  style={btnPrimaryStyle}
+                >
+                  {saving ? "Saving..." : "Save"}
+                </button>
+              )}
+              {isTestable && (
+                <button
+                  onClick={handleTest}
+                  disabled={testing}
+                  style={btnSecondaryStyle}
+                >
+                  {testing ? "Testing..." : "Test Connection"}
+                </button>
+              )}
+            </div>
+            <div
+              style={{ display: "flex", alignItems: "center", gap: "0.5rem" }}
+            >
+              {saveSuccess && (
+                <span
+                  style={{
+                    color: "var(--ctp-green)",
+                    fontSize: "var(--font-body)",
+                  }}
+                >
+                  Saved
+                </span>
+              )}
+              {saveError && (
+                <span
+                  style={{
+                    color: "var(--ctp-red)",
+                    fontSize: "var(--font-body)",
+                  }}
+                >
+                  {saveError}
+                </span>
+              )}
+            </div>
+          </div>
+
+          {/* Test result */}
+          {testResult && (
+            <div
+              style={{
+                ...testResultStyle,
+                borderColor: testResult.success
+                  ? "rgba(166, 227, 161, 0.3)"
+                  : "rgba(243, 139, 168, 0.3)",
+                background: testResult.success
+                  ? "rgba(166, 227, 161, 0.08)"
+                  : "rgba(243, 139, 168, 0.08)",
+              }}
+            >
+              <span
+                style={{
+                  color: testResult.success
+                    ? "var(--ctp-green)"
+                    : "var(--ctp-red)",
+                  fontWeight: 600,
+                }}
+              >
+                {testResult.success ? "OK" : "Failed"}
+              </span>
+              <span
+                style={{
+                  color: "var(--ctp-subtext0)",
+                  fontSize: "var(--font-body)",
+                }}
+              >
+                {testResult.message}
+              </span>
+              {testResult.latency_ms > 0 && (
+                <span
+                  style={{
+                    color: "var(--ctp-overlay1)",
+                    fontSize: "var(--font-body)",
+                  }}
+                >
+                  {testResult.latency_ms}ms
+                </span>
+              )}
+            </div>
+          )}
+        </div>
+      )}
+    </div>
+  );
+}
+
+// --- Field renderers per module ---
+
+function renderModuleFields(
+  moduleId: string,
+  settings: Record<string, unknown>,
+  getValue: (key: string) => unknown,
+  setValue: (key: string, value: unknown) => void,
+) {
+  switch (moduleId) {
+    case "core":
+      return (
+        <FieldGrid>
+          <EditableField
+            label="Host"
+            value={getValue("host")}
+            onChange={(v) => setValue("host", v)}
+          />
+          <EditableField
+            label="Port"
+            value={getValue("port")}
+            onChange={(v) => setValue("port", Number(v))}
+            type="number"
+          />
+          <EditableField
+            label="Base URL"
+            value={getValue("base_url")}
+            onChange={(v) => setValue("base_url", v)}
+          />
+          <ReadOnlyField
+            label="Read Only"
+            value={settings.readonly ? "Yes" : "No"}
+          />
+        </FieldGrid>
+      );
+    case "schemas":
+      return (
+        <FieldGrid>
+          <EditableField
+            label="Directory"
+            value={getValue("directory")}
+            onChange={(v) => setValue("directory", v)}
+          />
+          <EditableField
+            label="Default"
+            value={getValue("default")}
+            onChange={(v) => setValue("default", v)}
+          />
+          <ReadOnlyField label="Schema Count" value={settings.count} />
+        </FieldGrid>
+      );
+    case "database":
+      return (
+        <FieldGrid>
+          <EditableField
+            label="Host"
+            value={getValue("host")}
+            onChange={(v) => setValue("host", v)}
+          />
+          <EditableField
+            label="Port"
+            value={getValue("port")}
+            onChange={(v) => setValue("port", Number(v))}
+            type="number"
+          />
+          <EditableField
+            label="Database"
+            value={getValue("name")}
+            onChange={(v) => setValue("name", v)}
+          />
+          <EditableField
+            label="User"
+            value={getValue("user")}
+            onChange={(v) => setValue("user", v)}
+          />
+          <EditableField
+            label="Password"
+            value={getValue("password")}
+            onChange={(v) => setValue("password", v)}
+          />
+          <SelectField
+            label="SSL Mode"
+            value={getValue("sslmode")}
+            options={[
+              "disable",
+              "allow",
+              "prefer",
+              "require",
+              "verify-ca",
+              "verify-full",
+            ]}
+            onChange={(v) => setValue("sslmode", v)}
+          />
+          <EditableField
+            label="Max Connections"
+            value={getValue("max_connections")}
+            onChange={(v) => setValue("max_connections", Number(v))}
+            type="number"
+          />
+        </FieldGrid>
+      );
+    case "storage":
+      return (
+        <FieldGrid>
+          <EditableField
+            label="Endpoint"
+            value={getValue("endpoint")}
+            onChange={(v) => setValue("endpoint", v)}
+          />
+          <EditableField
+            label="Bucket"
+            value={getValue("bucket")}
+            onChange={(v) => setValue("bucket", v)}
+          />
+          <CheckboxField
+            label="Use SSL"
+            value={getValue("use_ssl")}
+            onChange={(v) => setValue("use_ssl", v)}
+          />
+          <EditableField
+            label="Region"
+            value={getValue("region")}
+            onChange={(v) => setValue("region", v)}
+          />
+        </FieldGrid>
+      );
+    case "auth":
+      return renderAuthFields(settings, getValue, setValue);
+    case "freecad":
+      return (
+        <FieldGrid>
+          <EditableField
+            label="URI Scheme"
+            value={getValue("uri_scheme")}
+            onChange={(v) => setValue("uri_scheme", v)}
+          />
+          <EditableField
+            label="Executable"
+            value={getValue("executable")}
+            onChange={(v) => setValue("executable", v)}
+          />
+        </FieldGrid>
+      );
+    case "odoo":
+      return (
+        <FieldGrid>
+          <EditableField
+            label="URL"
+            value={getValue("url")}
+            onChange={(v) => setValue("url", v)}
+          />
+          <EditableField
+            label="Database"
+            value={getValue("database")}
+            onChange={(v) => setValue("database", v)}
+          />
+          <EditableField
+            label="Username"
+            value={getValue("username")}
+            onChange={(v) => setValue("username", v)}
+          />
+        </FieldGrid>
+      );
+    case "jobs":
+      return (
+        <FieldGrid>
+          <EditableField
+            label="Definitions Directory"
+            value={getValue("directory")}
+            onChange={(v) => setValue("directory", v)}
+          />
+          <EditableField
+            label="Runner Timeout (s)"
+            value={getValue("runner_timeout")}
+            onChange={(v) => setValue("runner_timeout", Number(v))}
+            type="number"
+          />
+          <EditableField
+            label="Timeout Check (s)"
+            value={getValue("job_timeout_check")}
+            onChange={(v) => setValue("job_timeout_check", Number(v))}
+            type="number"
+          />
+          <EditableField
+            label="Default Priority"
+            value={getValue("default_priority")}
+            onChange={(v) => setValue("default_priority", Number(v))}
+            type="number"
+          />
+        </FieldGrid>
+      );
+    default:
+      return null;
+  }
+}
+
+function renderAuthFields(
+  settings: Record<string, unknown>,
+  getValue: (key: string) => unknown,
+  setValue: (key: string, value: unknown) => void,
+) {
+  const local = (getValue("local") ?? settings.local ?? {}) as Record<
+    string,
+    unknown
+  >;
+  const ldap = (getValue("ldap") ?? settings.ldap ?? {}) as Record<
+    string,
+    unknown
+  >;
+  const oidc = (getValue("oidc") ?? settings.oidc ?? {}) as Record<
+    string,
+    unknown
+  >;
+
+  const setNested = (
+    section: string,
+    current: Record<string, unknown>,
+    field: string,
+    v: unknown,
+  ) => {
+    setValue(section, { ...current, [field]: v });
+  };
+
+  return (
+    <div style={{ display: "flex", flexDirection: "column", gap: "1rem" }}>
+      <SubSection title="Local Auth">
+        <FieldGrid>
+          <CheckboxField
+            label="Enabled"
+            value={local.enabled}
+            onChange={(v) => setNested("local", local, "enabled", v)}
+          />
+          <EditableField
+            label="Default Admin"
+            value={local.default_admin_username}
+            onChange={(v) =>
+              setNested("local", local, "default_admin_username", v)
+            }
+          />
+          <EditableField
+            label="Default Admin Password"
+            value={local.default_admin_password}
+            onChange={(v) =>
+              setNested("local", local, "default_admin_password", v)
+            }
+          />
+        </FieldGrid>
+      </SubSection>
+      <SubSection title="LDAP / FreeIPA">
+        <FieldGrid>
+          <CheckboxField
+            label="Enabled"
+            value={ldap.enabled}
+            onChange={(v) => setNested("ldap", ldap, "enabled", v)}
+          />
+          <EditableField
+            label="URL"
+            value={ldap.url}
+            onChange={(v) => setNested("ldap", ldap, "url", v)}
+          />
+          <EditableField
+            label="Base DN"
+            value={ldap.base_dn}
+            onChange={(v) => setNested("ldap", ldap, "base_dn", v)}
+          />
+          <EditableField
+            label="Bind DN"
+            value={ldap.bind_dn}
+            onChange={(v) => setNested("ldap", ldap, "bind_dn", v)}
+          />
+          <EditableField
+            label="Bind Password"
+            value={ldap.bind_password}
+            onChange={(v) => setNested("ldap", ldap, "bind_password", v)}
+          />
+        </FieldGrid>
+      </SubSection>
+      <SubSection title="OIDC / Keycloak">
+        <FieldGrid>
+          <CheckboxField
+            label="Enabled"
+            value={oidc.enabled}
+            onChange={(v) => setNested("oidc", oidc, "enabled", v)}
+          />
+          <EditableField
+            label="Issuer URL"
+            value={oidc.issuer_url}
+            onChange={(v) => setNested("oidc", oidc, "issuer_url", v)}
+          />
+          <EditableField
+            label="Client ID"
+            value={oidc.client_id}
+            onChange={(v) => setNested("oidc", oidc, "client_id", v)}
+          />
+          <EditableField
+            label="Client Secret"
+            value={oidc.client_secret}
+            onChange={(v) => setNested("oidc", oidc, "client_secret", v)}
+          />
+          <EditableField
+            label="Redirect URL"
+            value={oidc.redirect_url}
+            onChange={(v) => setNested("oidc", oidc, "redirect_url", v)}
+          />
+        </FieldGrid>
+      </SubSection>
+    </div>
+  );
+}
+
+// --- Shared field components ---
+
+function FieldGrid({ children }: { children: React.ReactNode }) {
+  return <div style={fieldGridStyle}>{children}</div>;
+}
+
+function SubSection({
+  title,
+  children,
+}: {
+  title: string;
+  children: React.ReactNode;
+}) {
+  return (
+    <div>
+      <div style={subSectionTitleStyle}>{title}</div>
+      {children}
+    </div>
+  );
+}
+
+function ReadOnlyField({ label, value }: { label: string; value: unknown }) {
+  const display =
+    value === undefined || value === null || value === "" ? "—" : String(value);
+  return (
+    <div>
+      <div style={fieldLabelStyle}>{label}</div>
+      <div style={fieldValueStyle}>{display}</div>
+    </div>
+  );
+}
+
+function EditableField({
+  label,
+  value,
+  onChange,
+  type = "text",
+}: {
+  label: string;
+  value: unknown;
+  onChange: (v: string) => void;
+  type?: string;
+}) {
+  const strVal = value === undefined || value === null ? "" : String(value);
+  const isRedacted = strVal === "****";
+  return (
+    <div>
+      <div style={fieldLabelStyle}>{label}</div>
+      <input
+        type={isRedacted ? "password" : type}
+        value={isRedacted ? "" : strVal}
+        onChange={(e) => onChange(e.target.value)}
+        placeholder={isRedacted ? "••••••••" : undefined}
+        className="silo-input"
+        style={fieldInputStyle}
+      />
+    </div>
+  );
+}
+
+function SelectField({
+  label,
+  value,
+  options,
+  onChange,
+}: {
+  label: string;
+  value: unknown;
+  options: string[];
+  onChange: (v: string) => void;
+}) {
+  return (
+    <div>
+      <div style={fieldLabelStyle}>{label}</div>
+      <select
+        value={String(value ?? "")}
+        onChange={(e) => onChange(e.target.value)}
+        style={fieldInputStyle}
+      >
+        {options.map((opt) => (
+          <option key={opt} value={opt}>
+            {opt}
+          </option>
+        ))}
+      </select>
+    </div>
+  );
+}
+
+function CheckboxField({
+  label,
+  value,
+  onChange,
+}: {
+  label: string;
+  value: unknown;
+  onChange: (v: boolean) => void;
+}) {
+  return (
+    <div style={{ display: "flex", alignItems: "center", gap: "0.5rem" }}>
+      <input
+        type="checkbox"
+        checked={Boolean(value)}
+        onChange={(e) => onChange(e.target.checked)}
+        style={{ accentColor: "var(--ctp-mauve)" }}
+      />
+      <div style={fieldLabelStyle}>{label}</div>
+    </div>
+  );
+}
+
+// --- Styles ---
+
+const cardStyle: React.CSSProperties = {
+  backgroundColor: "var(--ctp-surface0)",
+  borderRadius: "0.75rem",
+  marginBottom: "0.75rem",
+  overflow: "hidden",
+};
+
+const headerStyle: React.CSSProperties = {
+  display: "flex",
+  alignItems: "center",
+  justifyContent: "space-between",
+  padding: "1rem 1.5rem",
+  cursor: "pointer",
+  userSelect: "none",
+};
+
+const bodyStyle: React.CSSProperties = {
+  padding: "0 1.5rem 1.25rem",
+};
+
+const footerStyle: React.CSSProperties = {
+  display: "flex",
+  justifyContent: "space-between",
+  alignItems: "center",
+  marginTop: "1rem",
+  paddingTop: "0.75rem",
+  borderTop: "1px solid var(--ctp-surface1)",
+};
+
+const toggleBtnStyle: React.CSSProperties = {
+  position: "relative",
+  width: 34,
+  height: 20,
+  borderRadius: 10,
+  border: "none",
+  cursor: "pointer",
+  padding: 0,
+  flexShrink: 0,
+  transition: "background-color 0.15s ease",
+};
+
+const toggleKnobStyle: React.CSSProperties = {
+  position: "absolute",
+  top: 3,
+  left: 3,
+  width: 14,
+  height: 14,
+  borderRadius: "50%",
+  backgroundColor: "var(--ctp-crust)",
+  transition: "transform 0.15s ease",
+};
+
+const badgeBase: React.CSSProperties = {
+  display: "inline-block",
+  padding: "0.15rem 0.5rem",
+  borderRadius: "1rem",
+  fontSize: "0.65rem",
+  fontWeight: 600,
+  textTransform: "uppercase",
+  letterSpacing: "0.05em",
+};
+
+const badgeStyles = {
+  active: {
+    ...badgeBase,
+    background: "rgba(166, 227, 161, 0.2)",
+    color: "var(--ctp-green)",
+  } as React.CSSProperties,
+  disabled: {
+    ...badgeBase,
+    background: "rgba(147, 153, 178, 0.15)",
+    color: "var(--ctp-overlay1)",
+  } as React.CSSProperties,
+  error: {
+    ...badgeBase,
+    background: "rgba(243, 139, 168, 0.2)",
+    color: "var(--ctp-red)",
+  } as React.CSSProperties,
+};
+
+const errorStyle: React.CSSProperties = {
+  color: "var(--ctp-red)",
+  fontSize: "var(--font-body)",
+};
+
+const depNoteStyle: React.CSSProperties = {
+  padding: "0 1.5rem",
+  color: "var(--ctp-overlay1)",
+  fontSize: "var(--font-body)",
+  fontStyle: "italic",
+};
+
+const fieldGridStyle: React.CSSProperties = {
+  display: "grid",
+  gridTemplateColumns: "1fr 1fr",
+  gap: "0.75rem 1.5rem",
+};
+
+const subSectionTitleStyle: React.CSSProperties = {
+  fontSize: "0.7rem",
+  fontWeight: 600,
+  textTransform: "uppercase",
+  letterSpacing: "0.05em",
+  color: "var(--ctp-overlay1)",
+  marginBottom: "0.5rem",
+  paddingBottom: "0.25rem",
+  borderBottom: "1px solid var(--ctp-surface1)",
+};
+
+const fieldLabelStyle: React.CSSProperties = {
+  color: "var(--ctp-subtext0)",
+  fontSize: "var(--font-body)",
+  fontWeight: 500,
+  marginBottom: "0.2rem",
+};
+
+const fieldValueStyle: React.CSSProperties = {
+  fontSize: "var(--font-body)",
+  color: "var(--ctp-text)",
+  fontFamily: "'JetBrains Mono', monospace",
+};
+
+const fieldInputStyle: React.CSSProperties = {
+  width: "100%",
+  padding: "0.4rem 0.6rem",
+  backgroundColor: "var(--ctp-base)",
+  border: "1px solid var(--ctp-surface1)",
+  borderRadius: "0.375rem",
+  color: "var(--ctp-text)",
+  fontSize: "var(--font-body)",
+  boxSizing: "border-box",
+};
+
+const btnPrimaryStyle: React.CSSProperties = {
+  padding: "0.4rem 0.75rem",
+  borderRadius: "0.25rem",
+  border: "none",
+  backgroundColor: "var(--ctp-mauve)",
+  color: "var(--ctp-crust)",
+  fontWeight: 500,
+  fontSize: "0.75rem",
+  cursor: "pointer",
+};
+
+const btnSecondaryStyle: React.CSSProperties = {
+  padding: "0.4rem 0.75rem",
+  borderRadius: "0.25rem",
+  border: "1px solid var(--ctp-surface2)",
+  backgroundColor: "transparent",
+  color: "var(--ctp-subtext1)",
+  fontWeight: 500,
+  fontSize: "0.75rem",
+  cursor: "pointer",
+};
+
+const testResultStyle: React.CSSProperties = {
+  display: "flex",
+  gap: "0.75rem",
+  alignItems: "center",
+  marginTop: "0.75rem",
+  padding: "0.5rem 0.75rem",
+  borderRadius: "0.5rem",
+  border: "1px solid",
+};

web/src/hooks/useFileUpload.ts

@@ -1,5 +1,4 @@
 import { useState, useCallback } from "react";
-import { post } from "../api/client";
 
 export interface PendingAttachment {
   file: File;
@@ -9,61 +8,65 @@ export interface PendingAttachment {
   error?: string;
 }
 
-interface PresignResponse {
-  object_key: string;
-  upload_url: string;
-  expires_at: string;
+interface UploadResponse {
+  id?: number;
+  object_key?: string;
 }
 
+/**
+ * Hook for uploading files via direct multipart POST.
+ *
+ * Callers provide the target URL; the hook builds a FormData body and uses
+ * XMLHttpRequest so that upload progress events are available.
+ */
 export function useFileUpload() {
   const [uploading, setUploading] = useState(false);
 
   const upload = useCallback(
     (
       file: File,
+      url: string,
       onProgress?: (progress: number) => void,
     ): Promise<PendingAttachment> => {
       setUploading(true);
 
       return (async () => {
         try {
-          // Get presigned URL.
-          const presign = await post<PresignResponse>(
-            "/api/uploads/presign",
-            {
-              filename: file.name,
-              content_type: file.type || "application/octet-stream",
-              size: file.size,
+          const form = new FormData();
+          form.append("file", file);
+
+          const result = await new Promise<UploadResponse>(
+            (resolve, reject) => {
+              const xhr = new XMLHttpRequest();
+              xhr.open("POST", url);
+              xhr.withCredentials = true;
+
+              xhr.upload.onprogress = (e) => {
+                if (e.lengthComputable) {
+                  onProgress?.(Math.round((e.loaded / e.total) * 100));
+                }
+              };
+
+              xhr.onload = () => {
+                if (xhr.status >= 200 && xhr.status < 300) {
+                  try {
+                    resolve(JSON.parse(xhr.responseText) as UploadResponse);
+                  } catch {
+                    resolve({});
+                  }
+                } else {
+                  reject(new Error(`Upload failed: HTTP ${xhr.status}`));
+                }
+              };
+
+              xhr.onerror = () => reject(new Error("Upload failed"));
+              xhr.send(form);
             },
           );
 
-          // Upload via XMLHttpRequest for progress events.
-          await new Promise<void>((resolve, reject) => {
-            const xhr = new XMLHttpRequest();
-            xhr.open("PUT", presign.upload_url);
-            xhr.setRequestHeader(
-              "Content-Type",
-              file.type || "application/octet-stream",
-            );
-
-            xhr.upload.onprogress = (e) => {
-              if (e.lengthComputable) {
-                onProgress?.(Math.round((e.loaded / e.total) * 100));
-              }
-            };
-
-            xhr.onload = () => {
-              if (xhr.status >= 200 && xhr.status < 300) resolve();
-              else reject(new Error(`Upload failed: HTTP ${xhr.status}`));
-            };
-
-            xhr.onerror = () => reject(new Error("Upload failed"));
-            xhr.send(file);
-          });
-
           return {
             file,
-            objectKey: presign.object_key,
+            objectKey: result.object_key ?? "",
             uploadProgress: 100,
             uploadStatus: "complete" as const,
           };

web/src/hooks/useModules.ts

@@ -0,0 +1,23 @@
+import { useEffect, useState, useCallback } from "react";
+import { get } from "../api/client";
+import type { ModuleInfo, ModulesResponse } from "../api/types";
+
+export function useModules() {
+  const [modules, setModules] = useState<Record<string, ModuleInfo>>({});
+  const [loading, setLoading] = useState(true);
+
+  const refresh = useCallback(() => {
+    get<ModulesResponse>("/api/modules")
+      .then((res) => setModules(res.modules))
+      .catch(() => {});
+  }, []);
+
+  useEffect(() => {
+    get<ModulesResponse>("/api/modules")
+      .then((res) => setModules(res.modules))
+      .catch(() => {})
+      .finally(() => setLoading(false));
+  }, []);
+
+  return { modules, loading, refresh };
+}

web/src/hooks/useSSE.ts

@@ -0,0 +1,76 @@
+import { useEffect, useRef, useCallback } from "react";
+
+type SSEHandler = (data: string) => void;
+
+/**
+ * Subscribe to the server-sent event stream at /api/events.
+ * Returns a stable `on` function to register typed event handlers.
+ * Reconnects automatically with exponential backoff on connection loss.
+ */
+export function useSSE() {
+  const handlersRef = useRef(new Map<string, Set<SSEHandler>>());
+
+  // Register a handler for a given event type. Returns an unsubscribe function.
+  const on = useCallback((eventType: string, handler: SSEHandler) => {
+    if (!handlersRef.current.has(eventType)) {
+      handlersRef.current.set(eventType, new Set());
+    }
+    handlersRef.current.get(eventType)!.add(handler);
+    return () => {
+      handlersRef.current.get(eventType)?.delete(handler);
+    };
+  }, []);
+
+  useEffect(() => {
+    let retryDelay = 1000;
+    let timer: ReturnType<typeof setTimeout>;
+    let cancelled = false;
+    let es: EventSource | null = null;
+
+    function dispatch(type: string, data: string) {
+      const handlers = handlersRef.current.get(type);
+      if (handlers) {
+        for (const h of handlers) h(data);
+      }
+    }
+
+    function connect() {
+      if (cancelled) return;
+
+      es = new EventSource("/api/events", { withCredentials: true });
+
+      es.onopen = () => {
+        retryDelay = 1000;
+      };
+
+      // The backend sends named events (event: settings.changed\ndata: ...),
+      // so we register listeners for all event types we care about.
+      // We use a generic message handler plus named event listeners.
+      const knownEvents = ["settings.changed", "server.state", "heartbeat"];
+      for (const eventType of knownEvents) {
+        es.addEventListener(eventType, ((e: MessageEvent) => {
+          dispatch(eventType, e.data);
+        }) as EventListener);
+      }
+
+      es.onerror = () => {
+        es?.close();
+        es = null;
+        if (!cancelled) {
+          timer = setTimeout(connect, retryDelay);
+          retryDelay = Math.min(retryDelay * 2, 30000);
+        }
+      };
+    }
+
+    connect();
+
+    return () => {
+      cancelled = true;
+      clearTimeout(timer);
+      es?.close();
+    };
+  }, []);
+
+  return { on };
+}

web/src/pages/SettingsPage.tsx

@@ -2,6 +2,7 @@ import { useEffect, useState, type FormEvent } from "react";
 import { get, post, del } from "../api/client";
 import { useAuth } from "../hooks/useAuth";
 import type { ApiToken, ApiTokenCreated } from "../api/types";
+import { AdminModules } from "../components/settings/AdminModules";
 
 export function SettingsPage() {
   const { user } = useAuth();
@@ -89,7 +90,7 @@ export function SettingsPage() {
   };
 
   return (
-    <div>
+    <div style={{ maxWidth: "66%", margin: "0 auto" }}>
       <h2 style={{ marginBottom: "1rem" }}>Settings</h2>
 
       {/* Account Card */}
@@ -216,7 +217,14 @@ export function SettingsPage() {
             {tokensError}
           </p>
         ) : (
-          <div style={{ overflowX: "auto", marginTop: "1rem" }}>
+          <div
+            style={{
+              overflowX: "auto",
+              overflowY: "auto",
+              maxHeight: "28rem",
+              marginTop: "1rem",
+            }}
+          >
             <table style={{ width: "100%", borderCollapse: "collapse" }}>
               <thead>
                 <tr>
@@ -311,6 +319,9 @@ export function SettingsPage() {
           </div>
         )}
       </div>
+
+      {/* Admin: Module Configuration */}
+      {user?.role === "admin" && <AdminModules />}
     </div>
   );
 }

web/src/styles/theme.css

@@ -67,6 +67,9 @@
     --d-footer-h: 28px;
     --d-footer-font: var(--font-table);
     --d-footer-px: 2rem;
+
+    --d-sidebar-w: 220px;
+    --d-sidebar-collapsed: 48px;
 }
 
 /* ── Density: compact ── */
@@ -98,4 +101,7 @@
     --d-footer-h: 24px;
     --d-footer-font: var(--font-sm);
     --d-footer-px: 1.25rem;
+
+    --d-sidebar-w: 180px;
+    --d-sidebar-collapsed: 40px;
 }