docs(phase-02): complete phase execution
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@@ -2,8 +2,8 @@
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gsd_state_version: 1.0
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milestone: v1.0
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milestone_name: milestone
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status: in-progress
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last_updated: "2026-03-03T00:18:25Z"
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status: completed
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last_updated: "2026-03-03T00:24:22.298Z"
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progress:
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total_phases: 2
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completed_phases: 2
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@@ -23,7 +23,7 @@ progress:
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**Phase:** 02-backend-correctness (complete)
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**Plan:** 2/2 (complete)
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**Status:** Phase 2 complete
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**Status:** Milestone complete
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```
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Phase Progress: [##......] 2/8 phases complete
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---
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phase: 02-backend-correctness
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verified: 2026-03-03T00:30:00Z
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status: passed
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score: 5/5 must-haves verified
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---
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# Phase 2: Backend Correctness Verification Report
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**Phase Goal:** All known error handling gaps are closed, configuration is secure, and the backend reports problems honestly instead of swallowing them
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**Verified:** 2026-03-03T00:30:00Z
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**Status:** passed
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**Re-verification:** No — initial verification
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## Goal Achievement
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### Observable Truths
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| # | Truth | Status | Evidence |
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|---|-------|--------|----------|
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| 1 | The package-level `startupErr` variable no longer exists; startup errors are stored in a YellowJacketApp struct field | ✓ VERIFIED | `grep "^var startupErr" backend/app.go` returns nothing; `startupErr error` at line 42 is a struct field; `yj.startupErr` used at lines 153, 154, 263, 264 |
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| 2 | Config files are written with 0o644 permissions | ✓ VERIFIED | `os.WriteFile(c.filePath, confFileData, 0o644)` at line 152 of config.go; no `0o666` anywhere in the file |
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| 3 | MPRIS lifecycle callback errors (Pause, Seek) appear in the application log instead of being silently discarded | ✓ VERIFIED | 4 `yj.logger.Warn("MPRIS ... failed"` calls at lines 184, 190, 198, 205 in app.go; no `_ = yj.player` anywhere in app.go |
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| 4 | Artist credit link creation checks the actual error — only UNIQUE constraint violations are ignored, all other errors are surfaced | ✓ VERIFIED | `database.IsUniqueViolation(err)` check at line 1127 of library.go; non-unique errors logged and sent to `metrics.addWarning` at lines 1128-1141; no `_, _ = q.CreateArtistCreditArtist` remains |
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| 5 | Library.Scan() returns warnings in ScanMetrics and fatal errors in the error return | ✓ VERIFIED | `scanErr` at line 225 only set from `commitBatch` fatal tx commit errors (line 391); 11 `metrics.addWarning` calls for walk/extraction/commit/orphan/variant paths; `handleConfigUpdate` at line 1365 captures `scanMetrics` and logs `scanMetrics.Warnings` count |
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**Score:** 5/5 truths verified
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### Required Artifacts
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| Artifact | Expected | Status | Details |
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|----------|----------|--------|---------|
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| `backend/app.go` | Startup error as struct field + MPRIS error logging | ✓ VERIFIED | `startupErr error` struct field line 42; 4 MPRIS Warn log calls |
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| `backend/config/config.go` | Secure config file permissions | ✓ VERIFIED | `0o644` at line 152 |
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| `backend/database/errors.go` | IsUniqueViolation helper | ✓ VERIFIED | 20 lines, exports `IsUniqueViolation`, uses `sqlite3.SQLITE_CONSTRAINT_UNIQUE` |
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| `backend/database/database.go` | Migration 3: UNIQUE index on artist_credit_artist | ✓ VERIFIED | `version < 3` block at line 224; deduplicates then creates `idx_artist_credit_artist_unique` |
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| `backend/library/metrics.go` | ScanWarning struct and addWarning method | ✓ VERIFIED | `ScanWarning` struct (lines 58-62) with FilePath/Phase/Err; `Warnings []ScanWarning` field (line 54); mutex-protected `addWarning` method (lines 94-103) |
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| `backend/library/library.go` | Reclassified error paths + updated cachedLinkArtist | ✓ VERIFIED | 11 `metrics.addWarning` calls; `database.IsUniqueViolation` at line 1127; `handleConfigUpdate` captures scan metrics |
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### Key Link Verification
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| From | To | Via | Status | Details |
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|------|----|-----|--------|---------|
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| `app.go:OnStartup` | `app.go:OnDomReady` | `yj.startupErr` field | ✓ WIRED | Set at line 153, checked at line 263 — no package-level var involved |
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| `app.go:MPRIS callbacks` | `yj.logger` | Warn log on Pause/Seek/Stop error | ✓ WIRED | 4 calls at lines 184, 190, 198, 205 |
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| `library.go:cachedLinkArtist` | `database/errors.go:IsUniqueViolation` | Error check on CreateArtistCreditArtist | ✓ WIRED | `database.IsUniqueViolation(err)` at line 1127; import at line 22 |
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| `library.go:Scan` | `metrics.go:addWarning` | Non-fatal errors reclassified | ✓ WIRED | 11 calls across walk, extraction, commit, orphan, variant, FTS paths |
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| `database.go:runMigrations` | artist_credit_artist table | Migration 3 UNIQUE index | ✓ WIRED | `idx_artist_credit_artist_unique` at line 245; dedup + PRAGMA user_version = 3 |
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### Requirements Coverage
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| Requirement | Source Plan | Description | Status | Evidence |
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|-------------|------------|-------------|--------|----------|
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| CORR-05 | 02-01 | Package-level startupErr moved to struct field | ✓ SATISFIED | No `var startupErr` in app.go; `startupErr error` as struct field; all references use `yj.startupErr` |
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| CORR-06 | 02-01 | Config file written with 0o644 permissions | ✓ SATISFIED | `0o644` at config.go:152; no `0o666` anywhere |
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| CORR-07 | 02-01 | MPRIS callback errors logged instead of swallowed | ✓ SATISFIED | 4 Warn-level log calls for Pause, PlayPause(pause), Stop, Seek; no discarded `_ = yj.player` |
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| CORR-08 | 02-02 | Artist credit link error properly checked | ✓ SATISFIED | `database.IsUniqueViolation` check; non-unique errors become warnings; migration 3 adds UNIQUE index |
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| CORR-09 | 02-02 | Scan() separates warnings from fatal errors | ✓ SATISFIED | `scanErr` only for fatal tx commits; 11 `addWarning` calls; `handleConfigUpdate` logs warning count |
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**Orphaned requirements:** None. All 5 requirement IDs (CORR-05 through CORR-09) from REQUIREMENTS.md Phase 2 are covered by plans 02-01 and 02-02.
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### Anti-Patterns Found
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| File | Line | Pattern | Severity | Impact |
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|------|------|---------|----------|--------|
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| — | — | None found | — | — |
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No TODOs, FIXMEs, placeholders, or empty implementations found in any modified files. `go vet ./backend/...` passes. `go build ./backend/...` compiles cleanly.
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### Human Verification Required
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### 1. MPRIS Error Logging Under Real Conditions
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**Test:** Trigger MPRIS Pause/Stop/Seek while the player is in a state that causes failure (e.g., no audio loaded)
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**Expected:** Warn-level log lines appear with "MPRIS Pause failed" / "MPRIS Stop failed" / "MPRIS Seek failed"
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**Why human:** Requires a running Linux desktop with MPRIS-capable media key events and specific player error states
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### 2. Config File Permissions on Disk
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**Test:** After app writes config, run `stat -c '%a' ~/.config/yellowjacket/config.toml`
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**Expected:** Shows `644`
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**Why human:** Requires running the actual app to trigger config write; umask may interact
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### 3. Scan Warning Accumulation End-to-End
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**Test:** Scan a library with some corrupted/unreadable audio files
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**Expected:** `Scan()` returns non-nil `ScanMetrics.Warnings` with entries for failed files, while the overall `error` return is nil (scan completed)
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**Why human:** Requires crafted test files with specific corruption patterns
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### Gaps Summary
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No gaps found. All 5 success criteria from the ROADMAP are verified:
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1. ✓ Package-level `startupErr` eliminated, struct field in place
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2. ✓ Config written with `0o644`
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3. ✓ All 4 MPRIS callbacks log errors at Warn level
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4. ✓ `cachedLinkArtist` checks errors via `IsUniqueViolation`, surfaces non-unique failures
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5. ✓ `Scan()` error return is fatal-only; warnings accumulated in `ScanMetrics.Warnings`; `handleConfigUpdate` logs warning count
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All commits verified: `2a86408`, `0860b2f`, `e6866de` exist in git history.
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---
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_Verified: 2026-03-03T00:30:00Z_
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_Verifier: Claude (gsd-verifier)_
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