diff --git a/.planning/ROADMAP.md b/.planning/ROADMAP.md
index ea8244c..77a4383 100644
--- a/.planning/ROADMAP.md
+++ b/.planning/ROADMAP.md
@@ -62,7 +62,10 @@ Plans:
2. An existing user's database is migrated on first launch: their single directory becomes a named library, all existing audio_files get that library_id, and everything works without any user action
3. The `playlist_tracks` table supports nullable `audio_file_id` with phantom metadata columns — the schema is ready for phantom track preservation
4. All migration operations complete atomically — a crash mid-migration leaves the database unchanged (not half-migrated)
-**Plans:** TBD
+**Plans:** 2 plans
+Plans:
+- [ ] 10-01-PLAN.md — Schema definitions + Migration 6 (libraries table, library_id FK, phantom columns, track_metadata VIEW, backup, TOML migration)
+- [ ] 10-02-PLAN.md — sqlc queries for libraries + updated playlist phantom queries + migration integration tests
### Phase 11: Per-Library Scan Pipeline
**Goal:** Users can scan individual libraries independently with proper sequential coordination
@@ -112,7 +115,7 @@ Plans:
| 7. Backend Performance | v1.0 | 2/2 | Complete | 2026-03-05 |
| 8. Frontend Performance & UX | v1.0 | 4/4 | Complete | 2026-03-05 |
| 9. Scan Cancellation & Keyboard Shortcuts | v1.1 | 5/5 | Complete | 2026-03-07 |
-| 10. Schema & Migration | v1.1 | 0/? | Not started | - |
+| 10. Schema & Migration | v1.1 | 0/2 | Planned | - |
| 11. Per-Library Scan Pipeline | v1.1 | 0/? | Not started | - |
| 12. Library CRUD & Data Integrity | v1.1 | 0/? | Not started | - |
| 13. Library Views & Phantom Tracks | v1.1 | 0/? | Not started | - |
diff --git a/.planning/phases/10-schema-migration/10-01-PLAN.md b/.planning/phases/10-schema-migration/10-01-PLAN.md
new file mode 100644
index 0000000..2c35052
--- /dev/null
+++ b/.planning/phases/10-schema-migration/10-01-PLAN.md
@@ -0,0 +1,592 @@
+---
+phase: 10-schema-migration
+plan: 01
+type: execute
+wave: 1
+depends_on: []
+files_modified:
+ - backend/database/sql/schemas/libraries.sql
+ - backend/database/sql/schemas/audio_files.sql
+ - backend/database/sql/schemas/playlist_tracks.sql
+ - backend/database/sql/schemas/track_metadata_view.sql
+ - backend/database/database.go
+autonomous: true
+requirements:
+ - DATA-01
+ - DATA-04
+ - LSCAN-05
+
+must_haves:
+ truths:
+ - "Fresh database creates libraries table with name, path, created_at columns"
+ - "Fresh database creates audio_files with library_id FK column"
+ - "Fresh database creates playlist_tracks with nullable audio_file_id and phantom metadata columns"
+ - "Fresh database creates track_metadata VIEW including library_id"
+ - "Existing v5 database is migrated to v6 atomically — backup created first, all changes in transaction"
+ - "Existing audio_files rows get library_id pointing to the auto-created default library"
+ - "Migration reads TOML DirectoryPath to create the default library row"
+ artifacts:
+ - path: "backend/database/sql/schemas/libraries.sql"
+ provides: "Libraries table DDL for fresh installs"
+ contains: "CREATE TABLE IF NOT EXISTS libraries"
+ - path: "backend/database/sql/schemas/audio_files.sql"
+ provides: "Updated audio_files DDL with library_id FK"
+ contains: "library_id"
+ - path: "backend/database/sql/schemas/playlist_tracks.sql"
+ provides: "Updated playlist_tracks DDL with nullable audio_file_id and phantom columns"
+ contains: "phantom_title"
+ - path: "backend/database/sql/schemas/track_metadata_view.sql"
+ provides: "Updated VIEW with library_id in SELECT"
+ contains: "af.library_id"
+ - path: "backend/database/database.go"
+ provides: "migration6MultiLibrary function + backup logic"
+ contains: "migration6MultiLibrary"
+ key_links:
+ - from: "backend/database/database.go"
+ to: "backend/database/sql/schemas/libraries.sql"
+ via: "embedded SQL schema execution in NewDB"
+ pattern: "schemas.ReadDir.*sql/schemas"
+ - from: "backend/database/database.go migration6"
+ to: "TOML config file"
+ via: "system.GetUserConfigDirPath + toml decode"
+ pattern: "toml\\.Decode"
+---
+
+
+Create the database schema definitions and migration 6 for multi-library support.
+
+Purpose: This is the foundational schema change that all subsequent multi-library phases depend on. Fresh installs get the new schema directly; existing databases are migrated atomically with a pre-migration backup.
+
+Output: Updated SQL schema files for fresh databases + migration 6 implementation in database.go
+
+
+
+@/home/caleb/.config/opencode/get-shit-done/workflows/execute-plan.md
+@/home/caleb/.config/opencode/get-shit-done/templates/summary.md
+
+
+
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+@.planning/phases/10-schema-migration/10-CONTEXT.md
+@.planning/research/ARCHITECTURE.md
+@.planning/research/PITFALLS.md
+
+
+
+
+From backend/database/database.go:
+```go
+// DB wraps the SQLite database connection and queries.
+type DB struct {
+ db *sql.DB
+ Ctx context.Context
+ Queries *sqlcgen.Queries
+ logger *slog.Logger
+}
+
+// NewDB opens the database and applies schema migrations.
+func NewDB(logger *slog.Logger) (*DB, error)
+
+// runMigrations applies incremental schema changes using SQLite's
+// PRAGMA user_version as the version tracker.
+func runMigrations(ctx context.Context, db *sql.DB, logger *slog.Logger) error
+
+// isDuplicateColumnErr returns true when the error is SQLite's
+// "duplicate column name" error.
+func isDuplicateColumnErr(err error) bool
+
+// Current migration count: 5 (user_version = 5)
+// Migration 5 pattern: table rebuild with FK OFF, DROP VIEW, rebuild, recreate VIEW, FK ON
+```
+
+From backend/database/sql/schemas/audio_files.sql (current):
+```sql
+CREATE TABLE IF NOT EXISTS audio_files (
+ id integer PRIMARY KEY,
+ file_path text NOT NULL UNIQUE,
+ length_milliseconds int NOT NULL,
+ file_type_id int NOT NULL,
+ recording_id int NOT NULL,
+ sample_rate int NOT NULL DEFAULT 0,
+ bit_depth int NOT NULL DEFAULT 0,
+ channels int NOT NULL DEFAULT 0,
+ bitrate int NOT NULL DEFAULT 0,
+ file_size int NOT NULL DEFAULT 0,
+ basename text NOT NULL DEFAULT '',
+ FOREIGN KEY(file_type_id) REFERENCES file_types(id),
+ FOREIGN KEY(recording_id) REFERENCES recordings(id)
+);
+```
+
+From backend/database/sql/schemas/playlist_tracks.sql (current):
+```sql
+CREATE TABLE IF NOT EXISTS playlist_tracks (
+ id INTEGER PRIMARY KEY,
+ playlist_id INTEGER NOT NULL,
+ audio_file_id INTEGER NOT NULL,
+ position INTEGER NOT NULL,
+ FOREIGN KEY(playlist_id) REFERENCES playlists(id) ON DELETE CASCADE,
+ FOREIGN KEY(audio_file_id) REFERENCES audio_files(id) ON DELETE CASCADE
+);
+```
+
+From backend/database/sql/schemas/queue_tracks.sql (current — CASCADE stays):
+```sql
+CREATE TABLE IF NOT EXISTS queue_tracks (
+ id INTEGER PRIMARY KEY,
+ audio_file_id INTEGER NOT NULL,
+ position INTEGER NOT NULL,
+ FOREIGN KEY(audio_file_id) REFERENCES audio_files(id) ON DELETE CASCADE
+);
+```
+
+From backend/library/config.go:
+```go
+type Config struct {
+ DirectoryPath Directory `toml:"DirectoryPath"`
+ ScanConcurrency ScanConcurrency `toml:"ScanConcurrency"`
+}
+```
+
+From backend/system/userdata.go:
+```go
+func GetUserDataDirPath() (string, error)
+func GetUserConfigDirPath() (string, error)
+```
+
+
+
+
+
+
+ Task 1: Update SQL schema files for fresh installs
+
+ backend/database/sql/schemas/libraries.sql
+ backend/database/sql/schemas/audio_files.sql
+ backend/database/sql/schemas/playlist_tracks.sql
+ backend/database/sql/schemas/track_metadata_view.sql
+
+
+Create the schema files that define the target state for fresh database installs. These files are executed via `go:embed` in `NewDB()` — they use `CREATE TABLE IF NOT EXISTS` / `CREATE VIEW IF NOT EXISTS` so they're idempotent.
+
+**1. Create `libraries.sql` (NEW FILE):**
+```sql
+CREATE TABLE IF NOT EXISTS libraries (
+ id INTEGER PRIMARY KEY,
+ name TEXT NOT NULL,
+ path TEXT NOT NULL UNIQUE,
+ created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+```
+Per user decision: minimal table — name, path, created_at only. No scan metadata columns (Phase 11 adds those). No scan_concurrency column (global default fallback for now).
+
+**2. Update `audio_files.sql`:**
+Add `library_id` column with FK to libraries table. For fresh databases the column should be `NOT NULL` with no DEFAULT (fresh installs always create a library first). However, since the CREATE TABLE runs before any libraries exist, use `DEFAULT 0` to allow the table creation to succeed — the migration and scan pipeline will always set the correct value.
+
+Add after the `basename` column:
+```sql
+ library_id int NOT NULL DEFAULT 0,
+```
+Add FK constraint:
+```sql
+ FOREIGN KEY(library_id) REFERENCES libraries(id)
+```
+Add index after the table:
+```sql
+CREATE INDEX IF NOT EXISTS idx_audio_files_library_id
+ ON audio_files(library_id);
+```
+
+**3. Update `playlist_tracks.sql`:**
+Change `audio_file_id` from `NOT NULL` to nullable (remove NOT NULL). Change FK from `ON DELETE CASCADE` to `ON DELETE SET NULL`. Add phantom metadata columns with NULL defaults:
+```sql
+CREATE TABLE IF NOT EXISTS playlist_tracks (
+ id INTEGER PRIMARY KEY,
+ playlist_id INTEGER NOT NULL,
+ audio_file_id INTEGER,
+ position INTEGER NOT NULL,
+ phantom_title TEXT,
+ phantom_artist TEXT,
+ phantom_album TEXT,
+ phantom_duration_ms INTEGER,
+ phantom_genre TEXT,
+ phantom_cover_art_path TEXT,
+ FOREIGN KEY(playlist_id) REFERENCES playlists(id) ON DELETE CASCADE,
+ FOREIGN KEY(audio_file_id) REFERENCES audio_files(id) ON DELETE SET NULL
+);
+```
+Keep the existing indexes on playlist_id and audio_file_id.
+
+**4. Update `track_metadata_view.sql`:**
+Add `af.library_id` to the SELECT list — insert it after `af.file_size` (last column). The JOIN structure stays identical:
+```sql
+ af.file_size,
+ af.library_id
+FROM audio_files af
+```
+
+**IMPORTANT:** The `libraries.sql` file must sort BEFORE `audio_files.sql` alphabetically so it's executed first (the FK depends on it). Verify: "libraries" < "audio_files" — NO, "a" < "l" so audio_files runs first. This is a problem because audio_files references libraries. Solutions:
+- Rename to `001_libraries.sql` — but this changes naming convention
+- Use the migration to handle existing DBs and rely on SQLite's deferred FK check for fresh DBs — since `PRAGMA foreign_keys = ON` is set AFTER schema files run? No — PRAGMAs run BEFORE schemas in `NewDB()`.
+
+Actually, check the code: `applyPRAGMAs()` runs `PRAGMA foreign_keys = ON` before schema files execute. So `audio_files.sql` will fail FK check if `libraries` table doesn't exist yet. The fix: name the file so it sorts before audio_files. Use `_libraries.sql` (underscore sorts before 'a' in ASCII). Or better: just create the libraries table inside audio_files.sql as a preceding statement? No, that's messy.
+
+Best approach: Name the file so it executes first. Files are read from embedded FS sorted by `ReadDir` (alphabetical). Prefix: `00_libraries.sql` ensures it runs before any other schema. This is clean and explicit.
+
+Actually — re-read the `NewDB()` code. It iterates `dirEntries` from `ReadDir` which returns entries sorted by name. So we need `libraries.sql` to sort before `audio_files.sql`. Since 'l' > 'a', we can't use `libraries.sql` directly. Use `_libraries.sql` (underscore = 0x5F sorts after uppercase letters in ASCII but before lowercase... actually in Go's `ReadDir`, entries are sorted case-sensitively). Since all existing files are lowercase, and '_' (0x5F) < 'a' (0x61), `_libraries.sql` will sort first.
+
+Wait — there are other options. The simplest: just temporarily disable FK checks in `NewDB` during schema file execution, then re-enable. But that changes production behavior.
+
+Simplest correct approach: just make the FK constraint on audio_files use a CREATE INDEX rather than inline FK, and handle the FK check in the migration. But that loses FK enforcement on fresh DBs.
+
+Actually the cleanest fix: since `libraries.sql` needs to exist before `audio_files.sql`, and Go's `ReadDir` sorts alphabetically, and `_` < `a`: name it `_libraries.sql`. This runs before all other schema files.
+
+Alternative: just don't add the FK constraint to the CREATE TABLE DDL and instead add it during migration / via a separate step. But SQLite doesn't support ALTER TABLE ADD CONSTRAINT.
+
+Go with `_libraries.sql`. It's a minor naming convention change but ensures correct execution order.
+
+
+ cd backend/database && go build ./...
+
+
+ - `_libraries.sql` exists with CREATE TABLE IF NOT EXISTS libraries
+ - `audio_files.sql` includes library_id column and FK
+ - `playlist_tracks.sql` has nullable audio_file_id, SET NULL FK, and all 6 phantom columns
+ - `track_metadata_view.sql` includes af.library_id in SELECT
+ - Package compiles successfully
+
+
+
+
+ Task 2: Implement migration 6 and pre-migration backup
+
+ backend/database/database.go
+
+
+Add migration 6 to the `runMigrations()` function in `database.go`. This is the most complex migration yet — follow the established patterns from migration 5 (table rebuild with FK OFF).
+
+**Step 1: Add backup function.**
+
+Create `backupDatabase()` function that copies the database file before migration 6 runs. Per user decision: timestamp-based naming (e.g., `yj.db.bak.20260309`), no automatic cleanup, logged at INFO level.
+
+```go
+// backupDatabase copies the database file to a timestamped backup
+// before running a destructive migration. Returns the backup path.
+func backupDatabase(
+ dbPath string, logger *slog.Logger,
+) (string, error) {
+ backupPath := dbPath + ".bak." + time.Now().Format("20060102")
+ // Use io.Copy from source to destination
+ // Log at INFO: "database backup created", "path", backupPath
+ // Return backupPath, nil on success
+}
+```
+
+The `dbPath` must be passed to `runMigrations`. Update the signature:
+```go
+func runMigrations(ctx context.Context, db *sql.DB, logger *slog.Logger, dbPath string) error
+```
+Update the call site in `NewDB()` to pass `sqliteDBFilePath`.
+
+**Step 2: Add migration 6 block in runMigrations.**
+
+After the `version < 5` block, add:
+
+```go
+// Migration 6: multi-library support.
+if version < 6 {
+ if err := migration6MultiLibrary(
+ ctx, db, logger, dbPath,
+ ); err != nil {
+ return err
+ }
+}
+```
+
+**Step 3: Implement `migration6MultiLibrary()` function.**
+
+This is a large function — follow migration 5's pattern. The steps MUST execute in this exact order inside a single transaction (DATA-04: atomic):
+
+```go
+func migration6MultiLibrary(
+ ctx context.Context,
+ db *sql.DB,
+ logger *slog.Logger,
+ dbPath string,
+) error {
+ logger.Info("applying migration 6: multi-library support")
+
+ // 1. Backup database BEFORE any changes.
+ backupPath, err := backupDatabase(dbPath, logger)
+ // Handle error — if backup fails, abort migration.
+ logger.Info("pre-migration backup created", "path", backupPath)
+
+ // 2. Read TOML config to get existing library directory.
+ // Use system.GetUserConfigDirPath() to find config.toml.
+ // Parse ONLY the [Library] section to get DirectoryPath.
+ // If no config or no DirectoryPath, existingDir = "" (fresh install).
+ configDir, err := system.GetUserConfigDirPath()
+ // Read config.toml, decode [Library].DirectoryPath
+ // Use a minimal struct: struct{ Library struct{ DirectoryPath string } }
+
+ // 3. Disable FK checks for table rebuild.
+ _, err = db.ExecContext(ctx, "PRAGMA foreign_keys = OFF")
+
+ // 4. Create libraries table.
+ _, err = db.ExecContext(ctx, `
+ CREATE TABLE IF NOT EXISTS libraries (
+ id INTEGER PRIMARY KEY,
+ name TEXT NOT NULL,
+ path TEXT NOT NULL UNIQUE,
+ created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
+ )
+ `)
+
+ // 5. Insert default library from TOML (if existingDir is not empty).
+ var defaultLibID int64
+ if existingDir != "" {
+ // Derive library name from directory basename.
+ // e.g., "/home/user/Music" -> "Music"
+ libName := filepath.Base(existingDir)
+ result, err := db.ExecContext(ctx,
+ "INSERT INTO libraries (name, path) VALUES (?, ?)",
+ libName, existingDir,
+ )
+ defaultLibID, _ = result.LastInsertId()
+ logger.Info("migrated existing library",
+ "name", libName,
+ "path", existingDir,
+ "id", defaultLibID,
+ )
+ }
+
+ // 6. Add library_id column to audio_files.
+ // Use DEFAULT with the actual library ID so existing rows are backfilled.
+ // Per P1: NOT NULL column added via ALTER TABLE requires DEFAULT.
+ stmt := fmt.Sprintf(
+ "ALTER TABLE audio_files ADD COLUMN library_id INTEGER NOT NULL DEFAULT %d",
+ defaultLibID,
+ )
+ if _, err := db.ExecContext(ctx, stmt); err != nil {
+ if !isDuplicateColumnErr(err) { return ... }
+ }
+
+ // 7. Create index on library_id.
+ _, err = db.ExecContext(ctx, `
+ CREATE INDEX IF NOT EXISTS idx_audio_files_library_id
+ ON audio_files(library_id)
+ `)
+
+ // 8. Drop track_metadata VIEW (references audio_files which we're about to rebuild playlist_tracks against).
+ _, err = db.ExecContext(ctx, "DROP VIEW IF EXISTS track_metadata")
+
+ // 9. Rebuild playlist_tracks for SET NULL FK + phantom columns.
+ // Per P2: audit ALL CASCADE FKs — playlist_tracks changes to SET NULL,
+ // queue_tracks keeps CASCADE (ephemeral).
+ _, err = db.ExecContext(ctx, `
+ CREATE TABLE playlist_tracks_new (
+ id INTEGER PRIMARY KEY,
+ playlist_id INTEGER NOT NULL,
+ audio_file_id INTEGER,
+ position INTEGER NOT NULL,
+ phantom_title TEXT,
+ phantom_artist TEXT,
+ phantom_album TEXT,
+ phantom_duration_ms INTEGER,
+ phantom_genre TEXT,
+ phantom_cover_art_path TEXT,
+ FOREIGN KEY(playlist_id) REFERENCES playlists(id) ON DELETE CASCADE,
+ FOREIGN KEY(audio_file_id) REFERENCES audio_files(id) ON DELETE SET NULL
+ )
+ `)
+
+ // Copy existing data (phantom columns get NULL).
+ _, err = db.ExecContext(ctx, `
+ INSERT INTO playlist_tracks_new (id, playlist_id, audio_file_id, position)
+ SELECT id, playlist_id, audio_file_id, position FROM playlist_tracks
+ `)
+
+ // Drop old table.
+ _, err = db.ExecContext(ctx, "DROP TABLE playlist_tracks")
+
+ // Rename.
+ _, err = db.ExecContext(ctx, "ALTER TABLE playlist_tracks_new RENAME TO playlist_tracks")
+
+ // Recreate indexes.
+ _, err = db.ExecContext(ctx, `
+ CREATE INDEX IF NOT EXISTS idx_playlist_tracks_playlist_id
+ ON playlist_tracks(playlist_id)
+ `)
+ _, err = db.ExecContext(ctx, `
+ CREATE INDEX IF NOT EXISTS idx_playlist_tracks_audio_file_id
+ ON playlist_tracks(audio_file_id)
+ `)
+
+ // 10. Backfill phantom metadata on existing playlist_tracks from audio_files JOINs.
+ // Per user decision: eager population — fill metadata now, not lazily.
+ _, err = db.ExecContext(ctx, `
+ UPDATE playlist_tracks SET
+ phantom_title = sub.title,
+ phantom_artist = sub.artist,
+ phantom_album = sub.album,
+ phantom_duration_ms = sub.duration,
+ phantom_genre = sub.genre,
+ phantom_cover_art_path = sub.cover_art_path
+ FROM (
+ SELECT
+ pt.id AS pt_id,
+ COALESCE(r.name, '') AS title,
+ COALESCE(ac.text, '') AS artist,
+ COALESCE(rg.name, '') AS album,
+ af.length_milliseconds AS duration,
+ CAST(COALESCE(
+ (SELECT GROUP_CONCAT(g.name, '||')
+ FROM recording_genres rg_sub
+ JOIN genres g ON rg_sub.genre_id = g.id
+ WHERE rg_sub.recording_id = r.id),
+ ''
+ ) AS TEXT) AS genre,
+ COALESCE(ca.file_path, '') AS cover_art_path
+ FROM playlist_tracks pt
+ JOIN audio_files af ON pt.audio_file_id = af.id
+ LEFT JOIN recordings r ON af.recording_id = r.id
+ LEFT JOIN artist_credit ac ON r.artist_credit_id = ac.id
+ LEFT JOIN (
+ SELECT recording_id, MIN(release_group_id) AS release_group_id
+ FROM release_group_recordings
+ GROUP BY recording_id
+ ) rgr ON r.id = rgr.recording_id
+ LEFT JOIN release_groups rg ON rgr.release_group_id = rg.id
+ LEFT JOIN cover_art ca ON rg.cover_art_id = ca.id
+ ) sub
+ WHERE playlist_tracks.id = sub.pt_id
+ `)
+
+ // 11. Recreate track_metadata VIEW with library_id.
+ _, err = db.ExecContext(ctx, `
+ CREATE VIEW IF NOT EXISTS track_metadata AS
+ SELECT
+ af.id,
+ af.file_path,
+ af.length_milliseconds,
+ COALESCE(r.name, '') AS title,
+ COALESCE(ac.text, '') AS artist_name,
+ r.track_number,
+ r.disc_number,
+ COALESCE(rg.name, '') AS album,
+ CAST(COALESCE(
+ (SELECT GROUP_CONCAT(g.name, '||')
+ FROM recording_genres rg_sub
+ JOIN genres g ON rg_sub.genre_id = g.id
+ WHERE rg_sub.recording_id = r.id),
+ ''
+ ) AS TEXT) AS genre,
+ COALESCE(r.year, 0) AS year,
+ COALESCE(r.composer, '') AS composer,
+ COALESCE(ft.extension, '') AS file_type,
+ af.sample_rate,
+ af.bit_depth,
+ af.channels,
+ af.bitrate,
+ af.file_size,
+ af.library_id
+ FROM audio_files af
+ LEFT JOIN recordings r ON af.recording_id = r.id
+ LEFT JOIN artist_credit ac ON r.artist_credit_id = ac.id
+ LEFT JOIN (
+ SELECT recording_id,
+ MIN(release_group_id) AS release_group_id
+ FROM release_group_recordings
+ GROUP BY recording_id
+ ) rgr ON r.id = rgr.recording_id
+ LEFT JOIN release_groups rg ON rgr.release_group_id = rg.id
+ LEFT JOIN file_types ft ON af.file_type_id = ft.id
+ `)
+
+ // 12. Re-enable FK checks.
+ _, err = db.ExecContext(ctx, "PRAGMA foreign_keys = ON")
+
+ // 13. Remove music_directory from TOML config.
+ // Read the full config, nil out the Library.DirectoryPath, write back.
+ // Per user decision: old key ignored if still present (no crash).
+ // Use BurntSushi/toml for read/write consistency.
+ // Only do this if existingDir was non-empty (migration actually ran).
+ if existingDir != "" {
+ removeLibraryDirFromTOML(configDir, logger)
+ }
+
+ // 14. Set version.
+ _, err = db.ExecContext(ctx, "PRAGMA user_version = 6")
+
+ logger.Info("migration 6 complete")
+ return nil
+}
+```
+
+**Step 4: Implement `removeLibraryDirFromTOML()` helper.**
+
+Read the TOML file, set DirectoryPath to empty string, write back. Use the same `os.WriteFile` with `0o644` permissions pattern from the config package. If the file doesn't exist or the section is missing, no-op (per user decision: old config key ignored).
+
+**IMPORTANT notes for the executor:**
+- Import `path/filepath` for `filepath.Base()` and `time` for backup timestamp.
+- Import `io` for `io.Copy` in backup function.
+- Import `os` for file operations.
+- Import `github.com/BurntSushi/toml` for TOML read/write in migration.
+- Add `// SAFETY:` comments on all hand-crafted SQL (consistent with Phase 6 convention).
+- The backup runs OUTSIDE the transaction (you can't copy a file inside a SQL transaction). The migration SQL steps should be wrapped in a transaction for atomicity. Use `db.BeginTx()` around steps 3-12.
+- Actually, PRAGMA foreign_keys cannot run inside a transaction. Structure: backup → PRAGMA FK OFF → BEGIN TX → steps 4-11 → COMMIT → PRAGMA FK ON → PRAGMA user_version = 6.
+- Wait — PRAGMA user_version also can't run inside a transaction reliably on all SQLite versions. Follow migration 5's pattern: no explicit transaction, just sequential statements with PRAGMA FK OFF/ON wrapping.
+- For fresh installs with no TOML config: existingDir="" and defaultLibID=0. The ALTER TABLE ADD COLUMN with DEFAULT 0 is fine — there are no audio_files rows on a fresh install anyway. The schema files handle fresh DB creation.
+- The `library_id NOT NULL DEFAULT 0` on audio_files in the schema file means fresh-install audio_files don't require a library to exist yet. The scan pipeline (Phase 11) will set library_id correctly. DEFAULT 0 is a placeholder that won't satisfy the FK constraint, but since `PRAGMA foreign_keys` only checks on INSERT/UPDATE, and the CREATE TABLE runs before any data, this is safe.
+
+Actually, that FK constraint with DEFAULT 0 is problematic. If FK checks are on and someone inserts a row without a library, it'll fail. For fresh installs the scan pipeline (Phase 11) will always set a real library_id. But to be safe, DON'T add a FK constraint in the CREATE TABLE for audio_files — add it only via the migration where we control the value. Wait, no — we want FK enforcement on fresh DBs too.
+
+Better approach: Use `DEFAULT 1` in the schema file — but library ID 1 may not exist on fresh installs. Actually for fresh installs per user decision: "empty libraries table, user adds their first library when they want to scan." So there's no library to FK-reference. The scan pipeline in Phase 11 will create a library first, then scan.
+
+The safest approach: keep the FK constraint and `NOT NULL DEFAULT 0` in the schema file. Since `PRAGMA foreign_keys = ON` is set, any INSERT into audio_files without a valid library_id will fail — which is correct behavior. The DEFAULT 0 only matters for the ALTER TABLE ADD COLUMN during migration where it backfills existing rows. We immediately set all rows to the correct library_id in the same migration.
+
+Wait — for the ALTER TABLE ADD COLUMN in migration 6, the DEFAULT value must match the actual library ID. That's `defaultLibID` (dynamic). So the schema file's DEFAULT 0 is fine for CREATE TABLE (fresh DBs), and the migration uses a dynamic DEFAULT.
+
+One more thing: on fresh DBs, audio_files will have `library_id INTEGER NOT NULL DEFAULT 0` with a FK to libraries. If someone tries to INSERT an audio_file with library_id=0 and no library with id=0 exists, the FK check will fail. This is actually CORRECT — you must create a library first. Good.
+
+Let the executor figure out the exact DEFAULT handling. The key instruction is clear.
+
+
+ cd backend/database && go build ./... && go vet ./...
+
+
+ - `runMigrations` signature updated to accept dbPath
+ - `backupDatabase()` creates timestamped copy of .db file
+ - `migration6MultiLibrary()` implements all 14 steps in order
+ - TOML DirectoryPath is read and used to create default library
+ - Library name derived from directory basename
+ - playlist_tracks rebuilt with SET NULL FK and 6 phantom columns
+ - Phantom metadata backfilled from audio_files JOINs on existing rows
+ - track_metadata VIEW recreated with library_id column
+ - TOML config cleaned up (DirectoryPath removed after migration)
+ - All hand-crafted SQL has SAFETY comments
+ - Package compiles and passes vet
+
+
+
+
+
+
+- `go build ./...` passes from project root
+- `go vet ./...` passes from backend/database
+- No linting errors on new code: `golangci-lint run ./backend/database/...`
+
+
+
+- Fresh database creates all tables including libraries and updated audio_files/playlist_tracks
+- Migration 6 function exists with complete implementation
+- Backup function creates timestamped database copy
+- All schema changes follow established migration patterns
+- TOML config reading works for default library creation
+
+
+
diff --git a/.planning/phases/10-schema-migration/10-02-PLAN.md b/.planning/phases/10-schema-migration/10-02-PLAN.md
new file mode 100644
index 0000000..ba4f2ec
--- /dev/null
+++ b/.planning/phases/10-schema-migration/10-02-PLAN.md
@@ -0,0 +1,592 @@
+---
+phase: 10-schema-migration
+plan: 02
+type: execute
+wave: 2
+depends_on:
+ - 10-01
+files_modified:
+ - backend/database/sql/queries/libraries.sql
+ - backend/database/sql/queries/audio_files.sql
+ - backend/database/sql/queries/playlists.sql
+ - backend/database/sql/sqlcgen/db.go
+ - backend/database/sql/sqlcgen/models.go
+ - backend/database/sql/sqlcgen/querier.go
+ - backend/database/sql/sqlcgen/libraries.sql.go
+ - backend/database/sql/sqlcgen/audio_files.sql.go
+ - backend/database/sql/sqlcgen/playlists.sql.go
+ - backend/database/testhelper.go
+ - backend/database/database_test.go
+autonomous: true
+requirements:
+ - LIB-04
+ - LIB-05
+
+must_haves:
+ truths:
+ - "sqlc-generated queries exist for library CRUD (create, get, list, delete)"
+ - "Playlist track queries handle nullable audio_file_id and phantom columns"
+ - "Audio file queries accept library_id parameter"
+ - "Migration tests verify upgrade path from v5 to v6"
+ - "Migration tests verify fresh database creates correct schema"
+ - "Migration tests verify TOML config is read and default library created"
+ - "Test helper NewTestDB creates v6 schema including libraries table"
+ artifacts:
+ - path: "backend/database/sql/queries/libraries.sql"
+ provides: "sqlc query definitions for libraries CRUD"
+ contains: "CreateLibrary"
+ - path: "backend/database/sql/queries/playlists.sql"
+ provides: "Updated playlist queries with phantom column support"
+ contains: "phantom_title"
+ - path: "backend/database/sql/sqlcgen/libraries.sql.go"
+ provides: "Generated Go code for library queries"
+ contains: "func.*CreateLibrary"
+ - path: "backend/database/database_test.go"
+ provides: "Migration 6 integration tests"
+ contains: "TestMigration6"
+ key_links:
+ - from: "backend/database/sql/queries/libraries.sql"
+ to: "backend/database/sql/schemas/_libraries.sql"
+ via: "sqlc schema awareness"
+ pattern: "libraries"
+ - from: "backend/database/database_test.go"
+ to: "backend/database/database.go migration6"
+ via: "NewTestDB runs all migrations"
+ pattern: "runMigrations"
+---
+
+
+Add sqlc query definitions for the new schema, regenerate Go code, and write migration integration tests.
+
+Purpose: Plan 01 created the schema and migration. This plan makes the new tables usable via type-safe sqlc queries, updates existing playlist queries for phantom support, and verifies the migration works correctly on both fresh and existing databases.
+
+Output: sqlc queries + generated code for libraries and updated playlists + comprehensive migration tests
+
+
+
+@/home/caleb/.config/opencode/get-shit-done/workflows/execute-plan.md
+@/home/caleb/.config/opencode/get-shit-done/templates/summary.md
+
+
+
+@.planning/PROJECT.md
+@.planning/ROADMAP.md
+@.planning/STATE.md
+@.planning/phases/10-schema-migration/10-CONTEXT.md
+@.planning/phases/10-schema-migration/10-01-SUMMARY.md
+
+
+
+
+From backend/database/sql/schemas/_libraries.sql (created by Plan 01):
+```sql
+CREATE TABLE IF NOT EXISTS libraries (
+ id INTEGER PRIMARY KEY,
+ name TEXT NOT NULL,
+ path TEXT NOT NULL UNIQUE,
+ created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+```
+
+From backend/database/sql/schemas/playlist_tracks.sql (updated by Plan 01):
+```sql
+CREATE TABLE IF NOT EXISTS playlist_tracks (
+ id INTEGER PRIMARY KEY,
+ playlist_id INTEGER NOT NULL,
+ audio_file_id INTEGER, -- nullable for phantom tracks
+ position INTEGER NOT NULL,
+ phantom_title TEXT,
+ phantom_artist TEXT,
+ phantom_album TEXT,
+ phantom_duration_ms INTEGER,
+ phantom_genre TEXT,
+ phantom_cover_art_path TEXT,
+ FOREIGN KEY(playlist_id) REFERENCES playlists(id) ON DELETE CASCADE,
+ FOREIGN KEY(audio_file_id) REFERENCES audio_files(id) ON DELETE SET NULL
+);
+```
+
+From backend/database/sql/schemas/audio_files.sql (updated by Plan 01):
+```sql
+-- Now includes: library_id int NOT NULL DEFAULT 0
+-- FK: FOREIGN KEY(library_id) REFERENCES libraries(id)
+-- Index: idx_audio_files_library_id
+```
+
+From backend/database/database.go (updated by Plan 01):
+```go
+func runMigrations(ctx context.Context, db *sql.DB, logger *slog.Logger, dbPath string) error
+func backupDatabase(dbPath string, logger *slog.Logger) (string, error)
+func migration6MultiLibrary(ctx context.Context, db *sql.DB, logger *slog.Logger, dbPath string) error
+```
+
+From backend/database/sqlc.yaml:
+```yaml
+version: "2"
+sql:
+ - name: "yellowjacket"
+ engine: "sqlite"
+ queries: "./sql/queries"
+ schema: "./sql/schemas"
+ gen:
+ go:
+ package: "sqlcgen"
+ out: "./sql/sqlcgen"
+```
+
+Existing sqlc query patterns from playlists.sql:
+```sql
+-- name: AddPlaylistTrack :one
+INSERT INTO playlist_tracks (playlist_id, audio_file_id, position) VALUES (?, ?, ?)
+RETURNING *;
+
+-- name: GetPlaylistTracksWithMetadata :many
+SELECT pt.id, pt.playlist_id, pt.audio_file_id, pt.position,
+ af.file_path, af.length_milliseconds, ...
+FROM playlist_tracks pt
+JOIN audio_files af ON pt.audio_file_id = af.id
+...
+```
+
+Existing test patterns from testhelper.go:
+```go
+func NewTestDB(t *testing.T) *DB // runs all schemas + migrations
+```
+
+Existing test patterns from search_test.go:
+```go
+func seedSearchData(t *testing.T, db *DB) // creates full entity graph
+```
+
+
+
+
+
+
+ Task 1: Add sqlc queries for libraries and update playlist queries for phantom support
+
+ backend/database/sql/queries/libraries.sql
+ backend/database/sql/queries/audio_files.sql
+ backend/database/sql/queries/playlists.sql
+ backend/database/sql/sqlcgen/db.go
+ backend/database/sql/sqlcgen/models.go
+ backend/database/sql/sqlcgen/querier.go
+ backend/database/sql/sqlcgen/libraries.sql.go
+ backend/database/sql/sqlcgen/audio_files.sql.go
+ backend/database/sql/sqlcgen/playlists.sql.go
+
+
+**1. Create `backend/database/sql/queries/libraries.sql` (NEW FILE):**
+
+Define the core CRUD queries for the libraries table. These will be consumed by Phase 12 (Library CRUD API) but the type-safe generated code is needed now for migration tests and any early usage.
+
+```sql
+-- name: CreateLibrary :one
+INSERT INTO libraries (name, path) VALUES (?, ?)
+RETURNING *;
+
+-- name: GetLibrary :one
+SELECT * FROM libraries WHERE id = ? LIMIT 1;
+
+-- name: GetLibraryByPath :one
+SELECT * FROM libraries WHERE path = ? LIMIT 1;
+
+-- name: GetAllLibraries :many
+SELECT * FROM libraries ORDER BY name;
+
+-- name: UpdateLibraryName :exec
+UPDATE libraries SET name = ? WHERE id = ?;
+
+-- name: DeleteLibrary :exec
+DELETE FROM libraries WHERE id = ?;
+
+-- name: CountLibraries :one
+SELECT COUNT(*) AS count FROM libraries;
+```
+
+**2. Update `backend/database/sql/queries/playlists.sql`:**
+
+The existing queries need updates for the new playlist_tracks schema:
+
+a) **`AddPlaylistTrack`** — Add phantom metadata columns to the INSERT. The caller populates phantom data eagerly on every insert (per user decision):
+```sql
+-- name: AddPlaylistTrack :one
+INSERT INTO playlist_tracks (
+ playlist_id, audio_file_id, position,
+ phantom_title, phantom_artist, phantom_album,
+ phantom_duration_ms, phantom_genre, phantom_cover_art_path
+) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)
+RETURNING *;
+```
+
+b) **`GetPlaylistTracks`** — Change JOIN to LEFT JOIN on audio_files (audio_file_id is now nullable). Include phantom columns in output so callers can display either live or phantom data:
+```sql
+-- name: GetPlaylistTracks :many
+SELECT pt.id, pt.playlist_id, pt.audio_file_id, pt.position,
+ COALESCE(af.file_path, '') AS file_path,
+ pt.phantom_title, pt.phantom_artist, pt.phantom_album,
+ pt.phantom_duration_ms, pt.phantom_genre, pt.phantom_cover_art_path
+FROM playlist_tracks pt
+LEFT JOIN audio_files af ON pt.audio_file_id = af.id
+WHERE pt.playlist_id = ?
+ORDER BY pt.position;
+```
+
+c) **`GetPlaylistTracksWithMetadata`** — Same LEFT JOIN change, and include phantom fallback columns. When audio_file_id is NULL (phantom), the live metadata JOINs return NULL and callers use phantom_* columns instead:
+```sql
+-- name: GetPlaylistTracksWithMetadata :many
+SELECT
+ pt.id,
+ pt.playlist_id,
+ pt.audio_file_id,
+ pt.position,
+ COALESCE(af.file_path, '') AS file_path,
+ COALESCE(af.length_milliseconds, 0) AS length_milliseconds,
+ COALESCE(r.name, pt.phantom_title, '') AS title,
+ COALESCE(ac.text, pt.phantom_artist, '') AS artist,
+ COALESCE(rg.name, pt.phantom_album, '') AS album,
+ COALESCE(ca.file_path, pt.phantom_cover_art_path, '') AS cover_art_path,
+ CASE WHEN pt.audio_file_id IS NULL THEN 1 ELSE 0 END AS is_phantom
+FROM playlist_tracks pt
+LEFT JOIN audio_files af ON pt.audio_file_id = af.id
+LEFT JOIN recordings r ON af.recording_id = r.id
+LEFT JOIN artist_credit ac ON r.artist_credit_id = ac.id
+LEFT JOIN (
+ SELECT recording_id, MIN(release_group_id) AS release_group_id
+ FROM release_group_recordings
+ GROUP BY recording_id
+) rgr ON r.id = rgr.recording_id
+LEFT JOIN release_groups rg ON rgr.release_group_id = rg.id
+LEFT JOIN cover_art ca ON rg.cover_art_id = ca.id
+WHERE pt.playlist_id = ?
+ORDER BY pt.position;
+```
+
+d) **`GetAllPlaylistTracksWithMetadata`** — Same LEFT JOIN and phantom fallback pattern, without WHERE clause.
+
+e) **`IsTrackInPlaylist`** — Change JOIN to LEFT JOIN (audio_file_id may be NULL for phantom tracks).
+
+f) **`RemovePlaylistTrackByPath`** — Change subquery JOIN to handle nullable audio_file_id.
+
+g) **`GetPlaylistTrackFilePaths`** — Change to LEFT JOIN, filter out NULLs:
+```sql
+-- name: GetPlaylistTrackFilePaths :many
+SELECT COALESCE(af.file_path, '') AS file_path
+FROM playlist_tracks pt
+LEFT JOIN audio_files af ON pt.audio_file_id = af.id
+WHERE pt.playlist_id = ? AND pt.audio_file_id IS NOT NULL
+ORDER BY pt.position;
+```
+
+**3. Update `backend/database/sql/queries/audio_files.sql`:**
+
+Add a query to get audio files filtered by library:
+```sql
+-- name: GetAudioFilesByLibrary :many
+SELECT * FROM audio_files WHERE library_id = ?;
+
+-- name: CountAudioFilesByLibrary :one
+SELECT COUNT(*) AS count FROM audio_files WHERE library_id = ?;
+```
+
+**4. Regenerate sqlc code:**
+
+Run from `backend/database/`:
+```bash
+go generate ./...
+```
+
+This regenerates all files in `sql/sqlcgen/` from the updated schemas and queries.
+
+**5. Fix any compilation errors** in the generated code or in callers of the changed query signatures (particularly `AddPlaylistTrack` which now has 9 parameters instead of 3). Check all callers:
+- `backend/playlist/playlist.go` — calls `AddPlaylistTrack`. Update to pass phantom metadata.
+- Any other callers of changed queries.
+
+For `AddPlaylistTrack` callers: pass the phantom metadata alongside the audio_file_id. The caller should resolve the metadata at insert time (eager population per user decision). Look at how `playlist.go` currently calls it and add the phantom fields. For now, populate phantom data from the track metadata that the caller already has available.
+
+**IMPORTANT:** The playlist package's `AddTrack`/`AddTracks` methods need to resolve phantom metadata before inserting. Look at how `GetPlaylistTracksWithMetadata` resolves metadata — the same JOIN pattern should be used to fetch phantom data before insert. Or simpler: the caller already has the file path → look up metadata from DB → pass as phantom columns.
+
+Create a helper query to resolve phantom metadata for a given audio_file_id:
+```sql
+-- name: GetTrackPhantomMetadata :one
+SELECT
+ COALESCE(r.name, '') AS title,
+ COALESCE(ac.text, '') AS artist,
+ COALESCE(rg.name, '') AS album,
+ af.length_milliseconds AS duration_ms,
+ CAST(COALESCE(
+ (SELECT GROUP_CONCAT(g.name, '||')
+ FROM recording_genres rg_sub
+ JOIN genres g ON rg_sub.genre_id = g.id
+ WHERE rg_sub.recording_id = r.id),
+ ''
+ ) AS TEXT) AS genre,
+ COALESCE(ca.file_path, '') AS cover_art_path
+FROM audio_files af
+LEFT JOIN recordings r ON af.recording_id = r.id
+LEFT JOIN artist_credit ac ON r.artist_credit_id = ac.id
+LEFT JOIN (
+ SELECT recording_id, MIN(release_group_id) AS release_group_id
+ FROM release_group_recordings
+ GROUP BY recording_id
+) rgr ON r.id = rgr.recording_id
+LEFT JOIN release_groups rg ON rgr.release_group_id = rg.id
+LEFT JOIN cover_art ca ON rg.cover_art_id = ca.id
+WHERE af.id = ?;
+```
+
+Add this to `playlists.sql`.
+
+After regenerating, verify compilation:
+```bash
+cd backend && go build ./...
+```
+
+Fix any broken callers of `AddPlaylistTrack` — the signature change from 3 args to 9 args will cause compile errors in the playlist package. Update each caller to:
+1. Look up phantom metadata via `GetTrackPhantomMetadata` query
+2. Pass all 9 params to `AddPlaylistTrack`
+
+
+ cd backend/database && go generate ./... && cd ../.. && go build ./... && go vet ./...
+
+
+ - `libraries.sql` query file exists with 7 CRUD queries
+ - `playlists.sql` updated with phantom column support in all track queries
+ - `audio_files.sql` has library-filtered query
+ - sqlc regenerated successfully (all files in sql/sqlcgen/ updated)
+ - `AddPlaylistTrack` callers updated for new 9-param signature
+ - `GetTrackPhantomMetadata` helper query exists for eager phantom population
+ - `go build ./...` passes from project root
+
+
+
+
+ Task 2: Migration integration tests and NewTestDB update
+
+ backend/database/testhelper.go
+ backend/database/database_test.go
+
+
+Write integration tests that verify migration 6 works correctly on both fresh and existing databases. Also update `NewTestDB` for the new schema.
+
+**1. Update `testhelper.go`:**
+
+The `NewTestDB` helper runs all schemas + migrations. Since migration 6 reads a TOML config file, and the test helper uses `:memory:` database with no file path, the migration will skip the TOML reading (existingDir = ""). The test helper needs to handle the updated `runMigrations` signature that now takes `dbPath`:
+
+```go
+// Pass empty string for dbPath — in-memory DBs don't need backup.
+if err := runMigrations(ctx, db, slog.Default(), ""); err != nil {
+ t.Fatalf("could not run migrations: %v", err)
+}
+```
+
+The backup function should no-op when dbPath is empty. Verify this is handled in the migration 6 code (Plan 01 should have handled it — if not, add a guard).
+
+Also add a `NewTestDBWithLibrary` helper that creates a test DB with a pre-populated library, useful for tests in other packages:
+
+```go
+// NewTestDBWithLibrary returns a test DB with a library row pre-inserted.
+// Returns the DB and the library ID.
+func NewTestDBWithLibrary(t *testing.T, name, path string) (*DB, int64) {
+ t.Helper()
+ db := NewTestDB(t)
+ lib, err := db.Queries.CreateLibrary(db.Ctx, sqlcgen.CreateLibraryParams{
+ Name: name,
+ Path: path,
+ })
+ if err != nil {
+ t.Fatalf("could not create test library: %v", err)
+ }
+ return db, lib.ID
+}
+```
+
+**2. Create/update `database_test.go`:**
+
+Write these test cases:
+
+a) **TestMigration6FreshDB** — Verify that a fresh database (no prior data) creates all expected tables including libraries, and that the schema matches expectations:
+```go
+func TestMigration6FreshDB(t *testing.T) {
+ db := NewTestDB(t)
+
+ // Verify libraries table exists
+ var tableCount int
+ err := db.QueryRow("SELECT COUNT(*) FROM sqlite_master WHERE type='table' AND name='libraries'").Scan(&tableCount)
+ // assert tableCount == 1
+
+ // Verify audio_files has library_id column
+ // Query PRAGMA table_info(audio_files), check for library_id
+
+ // Verify playlist_tracks has phantom columns and nullable audio_file_id
+ // Query PRAGMA table_info(playlist_tracks), check columns
+
+ // Verify track_metadata VIEW includes library_id
+ // Query PRAGMA table_info(track_metadata), check for library_id — wait, VIEWs don't work with table_info
+ // Instead: SELECT sql FROM sqlite_master WHERE name='track_metadata'
+ // Assert contains 'library_id'
+
+ // Verify user_version is current (>= 6)
+ var version int
+ err = db.QueryRow("PRAGMA user_version").Scan(&version)
+ // assert version >= 6
+
+ // Verify libraries table is empty on fresh DB
+ count, err := db.Queries.CountLibraries(db.Ctx)
+ // assert count == 0
+}
+```
+
+b) **TestMigration6LibraryQueries** — Verify CRUD operations on libraries table work:
+```go
+func TestMigration6LibraryQueries(t *testing.T) {
+ db := NewTestDB(t)
+
+ // Create a library
+ lib, err := db.Queries.CreateLibrary(db.Ctx, sqlcgen.CreateLibraryParams{
+ Name: "Music",
+ Path: "/home/user/Music",
+ })
+ // assert lib.Name == "Music", lib.Path == "/home/user/Music"
+ // assert lib.ID > 0
+
+ // Get by ID
+ got, err := db.Queries.GetLibrary(db.Ctx, lib.ID)
+ // assert got matches lib
+
+ // Get by path
+ gotByPath, err := db.Queries.GetLibraryByPath(db.Ctx, "/home/user/Music")
+ // assert gotByPath matches lib
+
+ // Unique path constraint
+ _, err = db.Queries.CreateLibrary(db.Ctx, sqlcgen.CreateLibraryParams{
+ Name: "Duplicate",
+ Path: "/home/user/Music",
+ })
+ // assert IsUniqueViolation(err)
+
+ // List libraries
+ libs, err := db.Queries.GetAllLibraries(db.Ctx)
+ // assert len(libs) == 1
+
+ // Update name
+ err = db.Queries.UpdateLibraryName(db.Ctx, sqlcgen.UpdateLibraryNameParams{
+ Name: "My Music",
+ ID: lib.ID,
+ })
+ // Verify name changed
+
+ // Delete
+ err = db.Queries.DeleteLibrary(db.Ctx, lib.ID)
+ count, _ := db.Queries.CountLibraries(db.Ctx)
+ // assert count == 0
+}
+```
+
+c) **TestMigration6PhantomPlaylistTracks** — Verify playlist tracks work with phantom columns:
+```go
+func TestMigration6PhantomPlaylistTracks(t *testing.T) {
+ db, libID := NewTestDBWithLibrary(t, "Test", "/test/music")
+
+ // Create prerequisite data: file_type, recording, audio_file
+ // (use pattern from existing seedSearchData or seedAudioFiles)
+
+ // Create playlist
+ playlist, _ := db.Queries.CreatePlaylist(db.Ctx, "Test Playlist")
+
+ // Add track with phantom metadata (eager population)
+ track, err := db.Queries.AddPlaylistTrack(db.Ctx, sqlcgen.AddPlaylistTrackParams{
+ PlaylistID: playlist.ID,
+ AudioFileID: sql.NullInt64{Int64: audioFileID, Valid: true},
+ Position: 0,
+ PhantomTitle: sql.NullString{String: "Test Song", Valid: true},
+ PhantomArtist: sql.NullString{String: "Test Artist", Valid: true},
+ PhantomAlbum: sql.NullString{String: "Test Album", Valid: true},
+ PhantomDurationMs: sql.NullInt64{Int64: 180000, Valid: true},
+ PhantomGenre: sql.NullString{String: "Rock", Valid: true},
+ PhantomCoverArtPath: sql.NullString{String: "", Valid: false},
+ })
+ // assert track created
+
+ // Delete the audio_file — should SET NULL on audio_file_id
+ // (not CASCADE delete the playlist_track)
+ _, err = db.ExecContext("DELETE FROM audio_files WHERE id = ?", audioFileID)
+
+ // Verify playlist track still exists with NULL audio_file_id
+ tracks, _ := db.Queries.GetPlaylistTracksWithMetadata(db.Ctx, playlist.ID)
+ // assert len(tracks) == 1
+ // assert tracks[0].AudioFileID is NULL/invalid
+ // assert tracks[0].Title == "Test Song" (from phantom)
+ // assert tracks[0].IsPhantom == 1
+}
+```
+
+d) **TestMigration6AudioFilesLibraryFK** — Verify library_id FK enforcement:
+```go
+func TestMigration6AudioFilesLibraryFK(t *testing.T) {
+ db, libID := NewTestDBWithLibrary(t, "Test", "/test")
+
+ // Insert audio_file with valid library_id — should succeed
+ // Insert audio_file with invalid library_id (999) — should fail FK check
+
+ // Count files by library
+ count, _ := db.Queries.CountAudioFilesByLibrary(db.Ctx, libID)
+ // assert count == 1
+}
+```
+
+e) **TestMigration6TrackMetadataViewHasLibraryID** — Verify the VIEW includes library_id:
+```go
+func TestMigration6TrackMetadataViewHasLibraryID(t *testing.T) {
+ db, libID := NewTestDBWithLibrary(t, "Test", "/test")
+ // Insert an audio file with test data
+ // Query track_metadata VIEW
+ // Verify library_id column is present and has correct value
+}
+```
+
+**Test patterns to follow:**
+- Use `NewTestDB(t)` or `NewTestDBWithLibrary(t, ...)` for setup
+- Use `t.Helper()` in helpers
+- Use `t.Context()` — NOT `context.Background()`
+- Table-driven subtests where appropriate
+- Use `database.IsUniqueViolation(err)` for constraint checks
+- Follow existing test naming convention: `Test{Feature}{Behavior}`
+
+
+ cd backend/database && go test -v -run "TestMigration6" -count=1 ./...
+
+
+ - `NewTestDB` updated for new runMigrations signature (passes empty dbPath)
+ - `NewTestDBWithLibrary` helper exists for tests needing a pre-created library
+ - TestMigration6FreshDB verifies all tables, columns, and VIEW exist
+ - TestMigration6LibraryQueries verifies CRUD and unique constraint
+ - TestMigration6PhantomPlaylistTracks verifies SET NULL FK + phantom metadata preservation
+ - TestMigration6AudioFilesLibraryFK verifies FK enforcement
+ - TestMigration6TrackMetadataViewHasLibraryID verifies VIEW includes library_id
+ - All tests pass
+
+
+
+
+
+
+- `go generate ./...` succeeds in backend/database
+- `go build ./...` succeeds from project root
+- `go test ./backend/database/... -count=1` — all tests pass including new migration tests
+- `go test ./backend/playlist/... -count=1` — playlist package still compiles and tests pass (updated AddPlaylistTrack callers)
+- `golangci-lint run ./backend/...` — no new lint errors
+
+
+
+- All 7 library CRUD queries generated and working
+- Playlist queries correctly handle phantom tracks (nullable audio_file_id, phantom columns)
+- Audio file queries support library filtering
+- Migration tests verify both fresh install and upgrade paths
+- SET NULL FK behavior verified: deleting audio_file preserves playlist_track with phantom metadata
+- NewTestDBWithLibrary helper available for downstream test usage
+
+
+