yellowjacket/.planning/phases/15-schema-migration-write-safety/15-VERIFICATION.md

phase, verified, status, score, must_haves

phase	verified	status	score	must_haves
15-schema-migration-write-safety	2026-03-16T22:30:00Z	passed	10/10 must-haves verified	truths artifacts FTS5 search_index uses contentless_delete=1 after migration 8 DeleteSearchIndex performs a real DELETE for individual rows Existing search queries return identical results after migration Migration is idempotent — safe to re-run if interrupted ClearSearchIndex still works for full rebuilds AtomicWrite writes to a temp file then renames to target — original file is never in a half-written state Temp files use .yj-tmp suffix Cross-filesystem writes are rejected with a clear error Original file permissions are preserved on the new file Orphaned .yj-tmp files for the target path are cleaned up before writing path status backend/database/sql/schemas/search_index.sql verified path status backend/database/database.go verified path status backend/database/search.go verified path status backend/database/search_test.go verified path status backend/fileutil/atomicwrite.go verified path status backend/fileutil/atomicwrite_test.go verified

Phase 15: Schema Migration & Write Safety Verification Report

Phase Goal: The database and file system infrastructure supports safe, reversible tag editing — FTS5 rows can be deleted/updated and file writes never corrupt audio files Verified: 2026-03-16T22:30:00Z Status: passed Re-verification: No — initial verification

Goal Achievement

Observable Truths

#	Truth	Status	Evidence
1	FTS5 search_index uses contentless_delete=1 after migration 8	✓ VERIFIED	search_index.sql line 7: contentless_delete=1; database.go line 1123 migration8 recreates with same; search.go line 152 ClearSearchIndex matches
2	DeleteSearchIndex performs a real DELETE for individual rows	✓ VERIFIED	search.go lines 124-133: DELETE FROM search_index WHERE rowid = ? — no longer a no-op; no-op comment removed (grep confirms zero matches for "no-op" in search.go)
3	Existing search queries return identical results after migration	✓ VERIFIED	All 11 existing search tests pass (TestSearchFTS_BasicTerm, _EmptyQuery, _SpecialCharacters, _MultiWord, _Diacritics, _Ranking, TestSearchFTSByFilename, TestSearchFTSTracks, TestClearSearchIndex, TestRebuildSearchIndex, TestInsertAndDeleteSearchIndex) — go test confirms 0 failures
4	Migration is idempotent — safe to re-run if interrupted	✓ VERIFIED	migration8ContentlessDelete (database.go lines 1096-1155) uses DROP IF EXISTS + CREATE IF NOT EXISTS + bulk INSERT from track_metadata — naturally idempotent; version check if version < 8 prevents re-run after completion
5	ClearSearchIndex still works for full rebuilds	✓ VERIFIED	search.go lines 137-160: DROP + recreate with contentless_delete=1; TestClearSearchIndex and TestClearSearchIndexPreservesSchema both pass, confirming delete still works on recreated table
6	AtomicWrite writes to a temp file then renames to target	✓ VERIFIED	atomicwrite.go line 55: os.Create(tmpPath), line 92: os.Rename(tmpPath, targetPath); TestAtomicWrite_Success confirms content replaced atomically
7	Temp files use .yj-tmp suffix	✓ VERIFIED	atomicwrite.go line 21: const tmpSuffix = ".yj-tmp", line 35: tmpPath := targetPath + tmpSuffix; TestAtomicWrite_SameDirectoryTempFile verifies observed path matches
8	Cross-filesystem writes are rejected with a clear error	✓ VERIFIED	atomicwrite.go lines 93-94: checks errors.Is(err, syscall.EXDEV) and wraps with ErrCrossDevice; line 16: var ErrCrossDevice = errors.New(...) exported sentinel
9	Original file permissions are preserved on the new file	✓ VERIFIED	atomicwrite.go lines 48-51: os.Stat to read mode, line 87: os.Chmod(tmpPath, mode) before rename; TestAtomicWrite_PermissionPreservation tests 0644, 0755, 0600
10	Orphaned .yj-tmp files for the target path are cleaned up before writing	✓ VERIFIED	atomicwrite.go lines 38-45: os.Lstat + os.Remove on existing tmpPath; TestAtomicWrite_OrphanCleanup confirms orphan removed and new write succeeds

Score: 10/10 truths verified

Required Artifacts

Artifact	Expected	Status	Details
backend/database/sql/schemas/search_index.sql	FTS5 schema with contentless_delete=1	✓ VERIFIED	10 lines, contains contentless_delete=1 on line 7
backend/database/database.go	Migration 8 function	✓ VERIFIED	1279 lines; migration8ContentlessDelete at line 1096; called in runMigrations at line 328; sets PRAGMA user_version = 8
backend/database/search.go	Real DeleteSearchIndex + updated ClearSearchIndex	✓ VERIFIED	467 lines; DeleteSearchIndex lines 124-133 (real DELETE); ClearSearchIndex lines 137-160 (contentless_delete=1 in CREATE)
backend/database/search_test.go	Tests for delete, update cycle, ClearSearchIndex preservation	✓ VERIFIED	1130 lines (min_lines: 50 ✓); TestDeleteSearchIndex, TestSearchIndexUpdateCycle, TestClearSearchIndexPreservesSchema all present and passing
backend/fileutil/atomicwrite.go	AtomicWrite function + ErrCrossDevice	✓ VERIFIED	102 lines (min_lines: 40 ✓); exports AtomicWrite and ErrCrossDevice
backend/fileutil/atomicwrite_test.go	Comprehensive tests	✓ VERIFIED	293 lines (min_lines: 80 ✓); 7 test functions all passing with race detector

Key Link Verification

From	To	Via	Status	Details
backend/database/database.go	backend/database/search.go	migration 8 calls equivalent of RebuildSearchIndex (inlined SQL)	✓ WIRED	migration8ContentlessDelete inlines DROP/CREATE/INSERT matching ClearSearchIndex+RebuildSearchIndex logic (deviation documented: runMigrations receives raw *sql.DB, not *DB)
backend/database/search.go	search_index.sql	ClearSearchIndex CREATE matches schema file	✓ WIRED	search.go line 151-152 contentless_delete=1 matches search_index.sql line 7 exactly
backend/library/library.go	backend/database/search.go	library calls InsertSearchIndex and DeleteSearchIndex	✓ WIRED	library.go line 657 calls l.db.DeleteSearchIndex(audioFile.ID) for orphan cleanup; lines 1012, 1098 use InsertSearchIndex for scan operations
backend/fileutil/atomicwrite.go	os.Rename	atomic rename from temp to target	✓ WIRED	line 92: os.Rename(tmpPath, targetPath)
backend/fileutil/atomicwrite.go	os.Stat	preserve original file permissions	✓ WIRED	line 50: os.Stat(targetPath) reads mode; line 87: os.Chmod(tmpPath, mode) applies it

Requirements Coverage

Requirement	Source Plan	Description	Status	Evidence
SCHEMA-01	15-01-PLAN	FTS5 search_index migrated to contentless_delete=1 for safe row-level updates	✓ SATISFIED	Schema file, ClearSearchIndex, migration 8 all contain contentless_delete=1; DeleteSearchIndex performs real DELETE; all tests pass
SCHEMA-02	15-02-PLAN	Atomic file write utility (write-to-temp-then-rename in same directory)	✓ SATISFIED	backend/fileutil/atomicwrite.go with callback API, .yj-tmp suffix, permission preservation, orphan cleanup, cross-device rejection; 7 passing tests
WRITE-05	15-02-PLAN	All file writes use atomic write-to-temp-then-rename to prevent corruption	✓ SATISFIED	AtomicWrite function creates temp, writes via callback, syncs, chmods, then renames atomically; error paths clean up temp file; TestAtomicWrite_CallbackError confirms original file untouched on failure

Orphaned requirements: None. REQUIREMENTS.md traceability table maps SCHEMA-01, SCHEMA-02, WRITE-05 to Phase 15. All three are accounted for in plans 15-01 and 15-02.

Anti-Patterns Found

File	Line	Pattern	Severity	Impact
backend/library/scan_test.go	654-665	Stale comment: "DeleteSearchIndex on contentless FTS5 table is expected to error" — this is no longer true with contentless_delete=1	⚠️ Warning	Comment is misleading but test doesn't assert failure (uses t.Log); test still passes. No functional impact — cosmetic technical debt

Human Verification Required

None required. All truths are verifiable programmatically through code inspection and test execution. The phase is pure backend infrastructure with no UI components.

Gaps Summary

No gaps found. All 10 observable truths are verified. All 6 artifacts exist, are substantive (not stubs), and are properly wired. All 3 requirements (SCHEMA-01, SCHEMA-02, WRITE-05) are satisfied. All key links are connected. All tests pass (search tests: 0.161s, fileutil tests: 1.035s with race detector). Four git commits verified: cb5155b, 56cd7e3, 4d64b5d, 0cdfe48.

The one minor note is a stale comment in backend/library/scan_test.go (lines 654-665) that still describes DeleteSearchIndex as "expected to error" on contentless FTS5, which was true before Phase 15 but is now outdated. This is cosmetic and has no functional impact.

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Verified: 2026-03-16T22:30:00Z Verifier: Claude (gsd-verifier)