docs(01): VERIFICATION + Phase 1 closure markers — goal-backward audit GREEN
gsd-verifier goal-backward audit (2026-05-20) returned GREEN verdict on
Phase 1 (Stabilize Video Pipeline + whole-desktop capture + as-automatic-
as-platform-allows recording start):
- 17/17 must-haves verified: 11 REQs/charters + 6 cross-cutting gates
- 14/14 plans complete (01-01..01-09 + 01-11 spike-pivot + 01-12 + 01-13
+ 01-14 + 01-10)
- 5 operator empirical acks: Plan 01-07 (Chrome playback 2026-05-15) +
Plan 01-13 (harness 2026-05-19) + Plan 01-12 (brand-fit 2026-05-20) +
Plan 01-10 cycle-2 ("All good" 2026-05-20) + Plan 01-10 brand-rename
follow-up (2026-05-20)
- Test gates: vitest 153/153 GREEN; UAT harness 24/24 GREEN; Tier-1 grep
gate 12 FORBIDDEN_HOOK_STRINGS; pre-checkpoint bundle gates PASS
- 7 P0 audit defects: 6 closed in-Phase-1-scope; P0 #6 (data-sensitive
masking) properly deferred to Phase 2
Marker flips landed:
- STATE.md status reflects Phase 1 COMPLETE; completed_phases 0 → 1
- ROADMAP.md Phase 1 row [ ] → [x] with closure-arc summary
- REQUIREMENTS.md REQ-video-ring-buffer In-progress → Complete 2026-05-20
- VERIFICATION.md committed (orchestrator-bundle pattern per verifier
protocol)
Forward-looking deferred (NOT gaps):
- Phase 2: REQ-rrweb-dom-buffer + REQ-user-event-log +
REQ-password-confidentiality (audit P0 #6)
- Phase 5 hardening: getDisplayMedia cursor visibility; setimmediate
polyfill new Function pre-existing; tabs permission gap; dark-surface
logo contrast; 2 ffprobe/ffmpeg test flakes
Phase 2 (Stabilize DOM + event-capture privacy) kickoff pending.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
@@ -1,159 +1,123 @@
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---
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phase: 01-stabilize-video-pipeline
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verified: 2026-05-16T09:11:33Z
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verifier: gsd-verifier
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goal: The video ring buffer captures the most recent 30 s of the active tab's video continuously across tab switches, with a playable WebM header retained — so that on export the assembled `last_30sec.webm` will play.
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status: human_needed
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axes_total: 10
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axes_passed: 10
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axes_failed: 0
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axes_advisory: 2
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verified: 2026-05-20T12:25:00Z
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verifier: gsd-verifier (re-verification pass after May 16 initial verification + 14-plan landing)
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status: passed
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score: 17/17 must-haves verified (11 REQs/charters + 6 cross-cutting gates)
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re_verification:
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previous_verified: 2026-05-16T09:11:33Z
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previous_status: human_needed
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previous_score: 10/10 + 2 ADVISORY + 3 operator-side residue
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gaps_closed:
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- "REQ-video-ring-buffer #7 multi-EBML playability (Plan 01-08 webm-remux)"
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- "Whole-desktop charter (D-01 + D-15-display-surface; Plan 01-09)"
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- "Brand identity (D-07 + D-08; Plan 01-12)"
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- "First-install onboarding (D-17; Plan 01-10)"
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- "UAT harness 15→24 + functional contract closure (Plan 01-13 + Plan 01-14)"
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gaps_remaining: []
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regressions: []
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goal: "Phase 1 — Stabilize video pipeline + whole-desktop capture + as-automatic-as-platform-allows recording start. The video ring buffer captures the most recent 30 s of whole-desktop video continuously across tab switches, with a playable WebM remux + SPEC §10 #1/#2/#3/#7 green + brand-fit operator-facing surfaces + first-install onboarding."
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verdict: ACHIEVED
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---
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# Phase 1: Stabilize Video Pipeline — Goal-Backward Verification
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# Phase 1 Verification — Stabilize Video Pipeline (Goal-Backward Audit)
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## Phase Goal (verbatim from ROADMAP.md)
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**Verdict: ACHIEVED.** 14/14 functional plans landed; all REQs & decisions verified against codebase HEAD `d1ef77a`.
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> The video ring buffer captures the most recent 30 s of the active tab's video continuously across tab switches, with a playable WebM header retained — so that on export the assembled `last_30sec.webm` will play.
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## Goal (verbatim, ROADMAP.md + PROJECT.md)
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## Verdict
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Stabilize video pipeline: continuous 30 s whole-desktop ring buffer via `getDisplayMedia` in offscreen; playable single-EBML WebM remux on export; toolbar + notification + first-install welcome activation; brand-fit operator-facing surfaces.
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**DELIVERED** — 10 of 10 verification axes PASS against the codebase; phase goal is achieved by the wired implementation, not just by SUMMARY narration. Two **ADVISORY** notes recorded that do not block phase completion. Three **operator-side residue** items remain that THIS verifier cannot validate without a Chrome runtime — these MUST be picked up by Phase 4's SPEC §10 smoke pass.
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## Per-Requirement Scorecard
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Status is `human_needed` because the residue items below require a real Chrome operator session (visual picker UX, tab-switch continuity, SW idle survival) — automated codebase verification is exhausted.
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| # | Requirement / Decision | Evidence | Status |
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|---|---|---|---|
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| 1 | REQ-video-ring-buffer | `src/offscreen/recorder.ts:52-58` (`MAX_SEGMENTS=3 × 10s = 30s`); `:285-290` getDisplayMedia constraints; `:463-484` segment rotation; `src/background/webm-remux.ts` single-EBML remux; `tests/fixtures/last_30sec.webm` 1888636B ffprobe exit 0 | PASS |
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| 2 | REQ-install-clean | `npm run build` exit 0, 9 chunks produced incl. welcome (3.51 kB) + offscreen + SW (375 kB); `grep googleapis dist/` → 0; 8-bit RGBA icons 406/784/1952 B; operator brand-fit ack 2026-05-20 | PASS |
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| 3 | REQ-manifest-permissions | `manifest.json:7-15` — exactly `desktopCapture/activeTab/downloads/scripting/storage/offscreen/notifications`; NO `tabCapture`; `default_locale: "en"`; `__MSG_extName__` + `__MSG_extDesc__` + `__MSG_tooltipOff__` | PASS |
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| 4 | REQ-onboarding (D-17) | `src/background/index.ts:263-287` openWelcomeIfFirstInstall gated by `details.reason === 'install'` + `chrome.storage.local['onboarding-completed']`; `:1067-1087` onInstalled wiring with `.catch` defense; A15/A16/A17 GREEN | PASS |
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| 5 | D-01 whole-desktop charter | `recorder.ts:284-291` — `{video:{displaySurface:'monitor',cursor:'always'}, monitorTypeSurfaces:'include', audio:false}`; `:302-323` post-grant validation throws `wrong-display-surface` on mismatch; A3 + A23 harness GREEN | PASS |
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| 6 | D-06 always-on charter (Amendment 3 reversal) | `src/background/index.ts:722-740` docstring locks no-finally; `:830-834` explicit NO finally block; `tests/background/save-archive-does-not-stop-recording.test.ts` (inverted); harness A14 inverted (commit 1baaf45) | PASS |
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| 7 | D-07/D-08 brand identity | `_locales/en/messages.json:3-8` "Mokosh — Session Capture" + tagline; `_locales/ru/messages.json:3-8` "Mokosh — Запись сессии" + Cyrillic tagline; `tooltipOff` RU "Mokosh — щёлкните..."; operator brand-fit ack 2026-05-20 | PASS |
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| 8 | D-13 + D-14 multi-EBML remux | `src/offscreen/recorder.ts:366-416` `startNewSegment` per-rotation self-contained; `src/background/webm-remux.ts` ts-ebml + webm-muxer; `tests/fixtures/last_30sec.webm` ffprobe + ffmpeg dry-run exit 0; commit dd7bf00 Buffer polyfill | PASS |
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| 9 | T-1-04 sender-id check | `src/background/index.ts:384-388` port sender check; `:847-850` onMessage sender check; `recorder.ts:465-467` + onMessage enforced | PASS |
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| 10 | SW respawn safety (CR-03) | `src/background/index.ts:962-986` `hasDocument()` + early-resolve `offscreenReadyResolve` on detected pre-existing offscreen; long-lived port (D-17, PORT_PING_MS=25_000) | PASS |
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| 11 | Offscreen duality collapsed (P0-1) | `ls offscreen/` → ENOENT; `grep copy-offscreen vite.config.ts` → 0; `dist/src/offscreen/index.html` single source via crxjs rollupOptions.input | PASS |
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## Cross-Cutting Gates
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| Gate | Evidence | Status |
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|---|---|---|
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| vitest | 28 files / **153 tests / 153 GREEN** (SKIP_BUILD=1 after fresh `npm run build` — first-pass had 2 build-dependent + 1 known ffprobe flake, both resolved post-build) | PASS |
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| UAT harness | 24 drivers (A0 grep gate + A1..A14 + A15..A17 + A18..A22 + A23); SUMMARY 01-10 verifies 24/24 GREEN | PASS |
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| Tier-1 grep gate | 12 FORBIDDEN_HOOK_STRINGS (matches documented baseline); `dist/` contains 0 `__mokoshTest`/`installFakeDisplayMedia`/etc. | PASS |
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| Pre-checkpoint bundle gates | 0 `googleapis`/`https://fonts` in dist; 0 test-hook leaks; manifest validation + en↔ru parity tests GREEN | PASS |
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| tsc | `npx tsc --noEmit` exit 0 | PASS |
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| Phase 1 surface `as any` / `@ts-ignore` | 0 in `src/offscreen/`, `src/background/index.ts`, `src/shared/`, `src/welcome/`, `src/popup/` (only comments mentioning the absence; `src/content/` matches are Phase 2 territory) | PASS |
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## 7 P0 Audit Defects — Traceability
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| P0 # | Defect | Closed by | Status |
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|---|---|---|---|
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| 1 | Offscreen duality (`offscreen/index.ts` + vite inline) | Plans 01-03 + 01-06 | CLOSED |
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| 2 | MediaRecorder shadow bug | Plan 01-03 | CLOSED |
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| 3 | WebM ring buffer 200ms→2000ms + playability | Plans 01-03/04/07 + D-13 + Plan 01-08 D-14-remux | CLOSED |
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| 4 | Always-on capture (`onActivated`/`onUpdated`) | Plan 01-05 SW shrink + Plan 01-09 onStartup notification + Amendment 3 always-on charter | CLOSED (architecturally; `chrome.tabs.onActivated`/`onUpdated` absent — `grep` exit 1 — replaced by single MediaStream across rotations via D-15 amended) |
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| 5 | tabCapture user gesture | Plan 01-09 D-01 obviation via `getDisplayMedia` in offscreen + toolbar `chrome.action.onClicked` + notification onClicked paths | CLOSED |
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| 6 | rrweb data-sensitive masking | Phase 2 (deferred per REQUIREMENTS.md line 220) | DEFERRED to Phase 2 (out of Phase 1 scope) |
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| 7 | base64 data: URL download | Plan 01-08 webm-remux + JSZip; Note: `downloadArchive` at `src/background/index.ts:709-710` still uses `data:application/zip;base64,` URL via `blobToBase64` (REVIEW-FIX WR-08 single-source) — accepted Phase 1 trade-off; Phase 3 owns Blob-URL minted in offscreen per ROADMAP line 27 | CLOSED-in-scope (Blob-URL refinement is Phase 3 P0-6 territory) |
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## Operator-Empirical Acks (verbatim + commit refs)
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| Date | Plan | Operator response | Commit |
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|---|---|---|---|
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| 2026-05-15 | 01-07 (D-12 + A3 closure) | Chrome playback clean, ffmpeg dry-run exit 0 | cd61cbc (fixture) |
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| 2026-05-19 | 01-13 (harness UAT Task 9) | "all good" (recovery + restart-after-click) | 9c5ff8b + 1baaf45 |
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| 2026-05-20 | 01-12 (Wave 7 brand-fit) | "all good" (toolbar Loom icon, popup palette, manifest:name resolution EN+RU, Lora display, chrome.i18n notification copy) | f319c7d + 66e6f50 |
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| 2026-05-20 | 01-10 (cycle-2 onboarding) | "All good" (welcome page + canonical mark + Lora hero + Cyrillic tagline + onStartup CTA + notification.onClicked → startVideoCapture + reload-does-not-re-open + re-install branch) | 52dc2e6 + d1ef77a |
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| 2026-05-20 | 01-10 (cycle-2 brand-rename follow-up) | (same-day brand-polish ack on `d21ed17`) | d21ed17 |
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## Initial-Pass Residue (May 16) — Now Closed
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The May 16 initial verification flagged 3 operator-side items as `human_needed`. All resolved by subsequent plans + operator UAT:
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1. **OPR-1** (getDisplayMedia picker grant) → Plan 01-09 + Plan 01-14 ship `displaySurface:'monitor' + monitorTypeSurfaces:'include'`; operator empirically grants via picker; A3 + A23 harness GREEN.
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2. **OPR-2** (continuous capture across tab switches) → Plan 01-09 D-15-display-surface confirms no per-tab re-acquisition; A11 buffer-continuity harness GREEN over 35 s wait.
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3. **OPR-3** (SW idle-unload survival) → Plan 01-04 long-lived port + CR-03 fix verified; harness A2 (toolbar→record) reaches GREEN after SW respawn cycles.
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## Documentation Drift (NOT a gap — orchestrator marker-flip territory)
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REQUIREMENTS.md line 218 traceability table row reads "In progress (reopened 2026-05-16…)" but line 19 already shows `[x]` and SUMMARY chain + footer note (line 244) confirm the closure. STATE.md `progress.completed_phases: 0` and ROADMAP.md Phase 1 row `[ ]` are similarly pending marker flip. This is the explicit "Phase 1 final-closure marker flip pending" task the orchestrator owns post-verification per STATE.md `stopped_at` field.
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## Forward-Looking Deferred Items (NOT gaps)
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| Item | Owner | Source |
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|---|---|---|
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| REQ-rrweb-dom-buffer + REQ-user-event-log + REQ-password-confidentiality (P0 #6) | Phase 2 | REQUIREMENTS.md lines 220-222 |
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| Popup state machine + base64→Blob URL (P0-4 + P0-6) | Phase 3 | ROADMAP.md line 27 |
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| SPEC §10 full smoke pass (#1 install + #6 <5s latency + #8 password + #9 RAM) | Phase 4 | ROADMAP.md line 28 |
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| getDisplayMedia cursor visibility refinement (already mitigated via `cursor:'always'` in Plan 01-09 — but Phase 5 refinement remains for picker-UI polish) | Phase 5 | STATE.md line 187 |
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| setimmediate polyfill `new Function` in SW chunk | Phase 5 | deferred-items.md (pre-existing across Phase 1 history) |
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| `tabs` permission gap | Phase 5 | 01-13-SUMMARY.md line 186 |
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| 2 ffprobe/ffmpeg test flakes (build-dependent + frame-count timeout) | Phase 5 | This verification (153/153 GREEN with SKIP_BUILD=1; flakes are test-harness fragility, not production-code bugs) |
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| Dark-surface logo contrast | Phase 5 | (designer follow-up) |
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| ROADMAP 01-08..01-13 backfill verification | Phase 5 | 01-13-SUMMARY.md line 185 (now backfilled in ROADMAP lines 81-87) |
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## Per-Plan Closure Anchor Map
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| Plan | Closed | Commit | Operator Ack |
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|---|---|---|---|
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| 01-01..01-07 | 2026-05-15 | cd61cbc + REQ flip | smoke.sh + Chrome playback |
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| 01-08 (webm-remux) | 2026-05-17 | 9c5ff8b (closure) | (build-time gate; no UAT needed) |
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| 01-09 (toolbar+badge+notification) | 2026-05-19 (functional via harness) + 2026-05-20 (CTA-text fix) | Multiple incl. 4bba679 + a2dfc8c | "all good" + cycle-2 |
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| 01-10 (welcome tab) | 2026-05-20 | 52dc2e6 + d1ef77a | cycle-2 "All good" + brand-rename ack |
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| 01-11 (spike-pivot) | 2026-05-18 | ba5474c | (architectural learning only) |
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| 01-12 (design integration) | 2026-05-20 | f319c7d + 66e6f50 | brand-fit "all good" |
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| 01-13 (UAT harness) | 2026-05-19 | 9c5ff8b | Task 9 "all good" |
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| 01-14 (monitorTypeSurfaces) | 2026-05-19 | b467123 | (single-task; harness GREEN) |
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---
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## Per-Axis Verification Table
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**Final Verdict: Phase 1 goal ACHIEVED.** All must-haves verified in code; all operator empirical acks recorded; all deferred items routed to correct future phase. Orchestrator may flip `REQUIREMENTS.md`/`ROADMAP.md`/`STATE.md` markers + advance `progress.completed_phases: 0 → 1`.
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| # | Axis | Evidence (file:line or command) | Verdict |
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| -- | ------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------- |
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| 1 | "30 s ring buffer" — constants + rotation | `src/offscreen/recorder.ts:23-29` (`SEGMENT_DURATION_MS=10_000`, `MAX_SEGMENTS=3`, `VIDEO_BUFFER_DURATION_MS = 30_000`); `:86-89` push + shift cap; `:352-355` production rotation evict-oldest | PASS |
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| 2 | "Continuous across tab switches" — no re-acquire | `grep -RIn "onActivated\|onUpdated\|re-attach\|reAttach" src/` returns **no matches** (exit 1); `src/offscreen/recorder.ts:46` comment pins same-MediaStream across rotations; `getDisplayMedia` is screen/window-scoped per D-01 | PASS |
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| 3 | "Playable WebM" — D-13 per-segment self-contained | `src/offscreen/recorder.ts:252-302` `startNewSegment` constructs fresh MediaRecorder per rotation; `:349-370` `onSegmentStopped` finalizes & rotates; `tests/offscreen/segment-keyframes.test.ts:195-269` GREEN-pins "each retained segment starts with a keyframe" + 30-s window invariant | PASS |
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| 4 | "D-12 base64 wire transfer" | `src/shared/binary.ts:42-85` round-trip helpers; `src/shared/types.ts:64-68` `TransferredVideoSegment.data: string` (base64); `src/offscreen/recorder.ts:574` `await blobToBase64`; `src/background/index.ts:188` `base64ToBlob`; `tests/offscreen/port-serialization.test.ts` 9 tests GREEN | PASS |
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| 5 | "T-1-04 sender-id check both ends" | offscreen-side: `src/offscreen/recorder.ts:465-467` `isFromOwnExtension`, `:646` enforced on onMessage; SW-side: `src/background/index.ts:83-87` rejects port with mismatched sender, `:514-517` rejects onMessage with mismatched sender | PASS |
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| 6 | "SW respawn safety" | `src/background/index.ts:33-35` Promise; `:548-552` `OFFSCREEN_READY` resolves; `:576-595` `hasDocument()` check + early-resolve on detected pre-existing offscreen (CR-03 fix); `:608-613` `indexedDB.deleteDatabase('VideoRecorderDB')` in `onInstalled` | PASS |
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| 7 | "Manifest aligned" | `manifest.json:6-13` lists `desktopCapture` + `offscreen`; **no `tabCapture`**; `grep -RIn "tabCapture\|chrome.alarms" src/` returns **no matches** (exit 1); `chrome.runtime.connect` port replaces alarms keepalive (recorder.ts:606-631 + background/index.ts:78-118) | PASS |
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| 8 | "Fixture validity" | `tests/fixtures/last_30sec.webm` exists (1 633 459 bytes); `ffprobe -v error -f matroska -i ...` → exit 0, empty stderr; codec=vp9 Profile 0, 1142×1038, bt709 | PASS |
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| 9 | "Acceptance tests aligned" | `tests/offscreen/webm-playback.test.ts:94-114` `decodeDryRunStrict` invokes ffmpeg via `spawnSync` and parses stderr for packet-error + ended-prematurely; `npx vitest run` shows both empirical gates execute (988 ms + 914 ms) and PASS | PASS |
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| 10 | "Code-review aftermath — no regression" | 7 test files / 40 tests all green; tsc exit 0; type-safety grep clean; `npm run build` exit 0 (60 modules, dist/ produced); sweep commits 08a79a6 (stop-race), 7c91f52 (re-entrance + start-throw + dual-track teardown), 034155b (port-replaced diagnostic) inspected and preserve D-12/D-13 contracts | PASS |
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**Score: 10/10 axes verified.**
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---
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## Required Artifacts (3-level check)
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| Artifact | Expected | Status | Details |
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| --------------------------------------- | ------------------------------------------------------------------------- | -------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| `src/offscreen/recorder.ts` | getDisplayMedia + D-13 lifecycle + port + handshake | VERIFIED | Exists (673 lines, substantive); imported by offscreen/index.html via crxjs; bootstrap() runs on module load; ALL ring-buffer constants, classifier, lifecycle hardening present |
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| `src/background/index.ts` | SW with port-based fetch, T-1-04 sender check, hasDocument check | VERIFIED | Exists (618 lines); receives port via onConnect; runs `chrome.offscreen.hasDocument()` on init; CR-03 fix early-resolves `offscreenReady` on detected pre-existing offscreen |
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| `src/shared/binary.ts` | D-12 base64 ↔ Blob helpers | VERIFIED | Exists (85 lines); pure, portable (no FileReader); pinned by 9 tests in port-serialization.test.ts |
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| `src/shared/types.ts` | `VideoSegment` + `TransferredVideoSegment` wire-format | VERIFIED | `VideoSegment {data: Blob; timestamp}` + `TransferredVideoSegment {data: string; type; timestamp}` both present; `Message<T = unknown>` post-IN-05 |
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| `manifest.json` | `desktopCapture` + `offscreen` permissions; NO `tabCapture` | VERIFIED | Confirmed line-by-line |
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| `tests/offscreen/*.test.ts` (7 files) | codec-check, handshake, port, port-serialization, segment-keyframes, segment-rotation, webm-playback | VERIFIED | All 7 present; ring-buffer.test.ts retired (IN-03) leaving 7 file × 40-test surface |
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| `tests/fixtures/last_30sec.webm` | Empirical D-13 regression fixture | VERIFIED | 1 633 459 bytes; vp9 1142×1038; ffprobe + ffmpeg dry-run both exit 0 |
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---
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## Key Link Verification
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| From | To | Via | Status | Details |
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| --------------------------------------------------- | ------------------------------------------- | ------------------------------------------------------------ | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| `offscreen/index.html` | `src/offscreen/recorder.ts` | `<script type="module" src="./recorder.ts">` | WIRED | Confirmed at `src/offscreen/index.html:8`; crxjs picks up via rollupOptions.input in vite.config.ts |
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| `recorder.ts: encodeAndSendBuffer` | `binary.ts: blobToBase64` | `import { blobToBase64 } from '../shared/binary'` | WIRED | Imported at `recorder.ts:18`; called at `:574` |
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| `background/index.ts: getVideoBufferFromOffscreen` | `binary.ts: base64ToBlob` | `import { base64ToBlob, blobToBase64 } from '../shared/binary'` | WIRED | Imported at `background/index.ts:2`; called at `:188`; result wrapped in `VideoSegment[]` returned to `saveArchive` → `createArchive` → archive `video/last_30sec.webm` entry |
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| `recorder.ts: connectPort` | `background/index.ts: onConnect listener` | `chrome.runtime.connect({ name: 'video-keepalive' })` | WIRED | port name match enforced at `background/index.ts:80-82`; sender-id at `:83-87` |
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| `recorder.ts: bootstrap → sendMessage` | `background/index.ts: OFFSCREEN_READY case` | `chrome.runtime.sendMessage({ type: 'OFFSCREEN_READY' })` | WIRED | resolves `offscreenReady` Promise at `background/index.ts:548-552` |
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| `background/index.ts: startVideoCapture` | `recorder.ts: startRecording` | `chrome.runtime.sendMessage({ type: 'START_RECORDING' })` | WIRED | recorder.ts dispatches in `onMessage` switch at `:649-654` |
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---
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## Data-Flow Trace (Level 4 — Real Data Production)
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| Artifact | Data Variable | Source | Produces Real Data | Status |
|
||||
| ------------------------------ | ------------------------------ | ----------------------------------------------------------------------- | ---------------------------- | -------- |
|
||||
| `recorder.ts: segments` | `let segments: Blob[]` | `onSegmentStopped → new Blob(currentChunks) → push` driven by MediaRecorder.onstop | YES — real ~10 s WebM blobs from MediaRecorder | FLOWING |
|
||||
| `recorder.ts: encodeAndSendBuffer` | `transferred[]` | `await blobToBase64(segment)` per segment, sent over port | YES — round-trip pinned by tests; empirical fixture proves end-to-end | FLOWING |
|
||||
| `background/index.ts: mergeVideoSegments` | `finalBlob` | `new Blob(sortedSegments.map(s => s.data))` | YES — empirical fixture: 1.6 MB VP9 playable file | FLOWING |
|
||||
| `tests/fixtures/last_30sec.webm` | n/a (empirical fixture) | regenerated 2026-05-15 (commit cd61cbc) against D-13 recorder | YES — ffprobe exit 0 + ffmpeg dry-run exit 0 + operator-confirmed Chrome playback | FLOWING |
|
||||
|
||||
---
|
||||
|
||||
## Behavioral Spot-Checks
|
||||
|
||||
| Behavior | Command | Result | Status |
|
||||
| --------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------- | ------ |
|
||||
| Vitest suite passes | `npx vitest run --reporter=dot` | Test Files 7 passed (7); Tests 40 passed (40); 3.06s | PASS |
|
||||
| TypeScript type-check passes | `npx tsc --noEmit` | exit 0 (no output) | PASS |
|
||||
| No `as any` or `@ts-ignore` in Phase 1 surface | `grep -RIn "as any\|@ts-ignore" src/offscreen/ src/background/index.ts src/shared/` | exit 1 (no matches) | PASS |
|
||||
| No `tabCapture` / `chrome.alarms` residue | `grep -RIn "tabCapture\|chrome.alarms" src/` | exit 1 (no matches) | PASS |
|
||||
| No legacy IndexedDB SW plumbing | `grep -rn "openIndexedDB\|VideoRecorderDB" src/ --include='*.ts'` | Only matches: orphan-cleanup `indexedDB.deleteDatabase('VideoRecorderDB')` at `background/index.ts:609-610` (intentional) | PASS |
|
||||
| Legacy top-level `offscreen/` directory removed | `ls offscreen/` | exit 2 — directory does not exist | PASS |
|
||||
| Vite inline-plugin removed | `grep -rn "copy-offscreen\|chromeMediaSource" vite.config.ts` | exit 1 (no matches) | PASS |
|
||||
| Build produces loadable extension | `npm run build` | 60 modules transformed, exit 0; `dist/manifest.json`, `dist/assets/offscreen-*.js`, `dist/assets/index.ts-*.js` (SW) all produced | PASS |
|
||||
| Fixture decodable by ffprobe (D-12 gate) | `ffprobe -v error -f matroska -i tests/fixtures/last_30sec.webm` | exit 0; empty stderr | PASS |
|
||||
| Fixture passes A3 empirical decode dry-run | `ffmpeg -nostdin -v warning -i tests/fixtures/last_30sec.webm -f null -` | exit 0; **0** packet errors; **0** "File ended prematurely"; 298 DTS-monotonicity warnings (expected D-13 trade-off) + 1 "File extends beyond end of segment" (advisory, see below) | PASS |
|
||||
|
||||
---
|
||||
|
||||
## Requirements Coverage
|
||||
|
||||
| Requirement | Source Plan | Description | Status | Evidence |
|
||||
| ------------------------ | ---------------- | ------------------------------------------------------------------------------------------------------ | ---------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
|
||||
| REQ-video-ring-buffer | Phase 1 (all 7 plans) | 30 s in-memory ring buffer via D-13 restart-segments; `getDisplayMedia` (AMENDED from `chrome.tabCapture`); vp9 @ 400 000 bps | SATISFIED | All structural + empirical + wiring evidence above; SPEC §10 #2/#3/#7 functionally green at Phase 1 level |
|
||||
|
||||
**Phase 4 (SPEC §10 smoke) still owns the canonical 9-criterion sweep.** Phase 1 only proved #2/#3/#7 against the codebase + fixture; #1 install, #6 < 5 s export latency, #8 password masking, #9 RAM ceiling, and end-to-end Chrome runtime confirmation remain Phase 4 scope. This is by design per REQUIREMENTS.md line 188.
|
||||
|
||||
---
|
||||
|
||||
## Anti-Patterns Found
|
||||
|
||||
| File | Line | Pattern | Severity | Impact |
|
||||
| ----------------------------------- | -------- | ---------------------------------------------------------------------------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
|
||||
| (none) | — | No TODO/FIXME/XXX/HACK in Phase 1 surface; no `as any` / `@ts-ignore`; no `console.log`-only handlers; no empty `=> {}` rendering paths; no hardcoded empty arrays/objects flowing to user-visible output | — | Clean. |
|
||||
|
||||
The `ffmpeg` stderr emits a single `File extends beyond end of segment` line — this is **Matroska-demuxer-level informational**, not a decoder error, and is the documented D-13 trade-off (multi-EBML-header concat). Recorded as ADVISORY below, not as an anti-pattern.
|
||||
|
||||
---
|
||||
|
||||
## Advisory Observations
|
||||
|
||||
These do NOT block Phase 1 completion but warrant attention in Phase 4 or Phase 5.
|
||||
|
||||
1. **ADV-1: ffmpeg emits one `[in#0/matroska,webm] File extends beyond end of segment` line.** This is the Matroska demuxer noting that the SECOND EBML segment in the concatenated WebM declares a smaller `SegmentSize` than the remaining bytes (because subsequent segments follow). Chrome's MSE pipeline handles this natively — operator-confirmed playback was clean on 2026-05-15. The `webm-playback.test.ts` acceptance gate does NOT assert against this signal (only `packetErrorCount === 0` and `endedPrematurely === false`), so it is correctly NOT a failure. Recommend documenting this signal in the Phase 5 cursor-visibility plan's "expected stderr from ffmpeg dry-run" allow-list to prevent future verifiers from being surprised by it.
|
||||
|
||||
2. **ADV-2: `blobToBase64` per-byte concat is O(n²) for large blobs.** WR-06 in REVIEW-FIX.md was pre-approved for Phase 2 deferral with the documented rationale (`String.fromCharCode(...subarray)` apply-spread argument-length limit ~64 KiB). For the current ~1.6 MB fixture this works fine; if recording quality rises (higher bitrate, longer windows, audio in CAP-01) the encode latency could grow non-linearly. Phase 2 quality-bump review should consider chunked-apply at 32 KiB stride per REVIEW.md's WR-06 recommendation.
|
||||
|
||||
---
|
||||
|
||||
## Operator-Side Residue (UAT scope)
|
||||
|
||||
These behaviors CANNOT be verified by this codebase verifier — they require a real Chrome runtime and an operator. Phase 4 SPEC §10 smoke pass MUST cover them:
|
||||
|
||||
1. **OPR-1: `getDisplayMedia` picker UX appears and grants stream on operator click.** Chrome's native screen-share picker dialog cannot be driven from Vitest's Node environment. Verification path: load `dist/` unpacked → click extension → observe picker dialog → pick "Entire screen" → confirm "Sharing your screen" indicator appears → SW console shows `[Offscreen:Recorder] Stream created`. (VALIDATION.md §"Manual-Only Verifications" row 1.)
|
||||
|
||||
2. **OPR-2: Continuous recording across tab switches under live `getDisplayMedia` stream.** Codebase verification confirms NO per-tab re-acquisition code exists (no `chrome.tabs.onActivated` handlers; recorder retains single `MediaStream` across rotations); this is a SUFFICIENT structural condition. Empirical confirmation that the recording does NOT pause when the operator switches tabs in Chrome requires a live session. Verification path: start recording, switch tabs 3-5 times over 30 s, export, confirm `last_30sec.webm` covers the full 30 s window. (VALIDATION.md §"Manual-Only Verifications" row 2 analogue, applied to amended D-15 semantics.)
|
||||
|
||||
3. **OPR-3: SW idle-unload survival.** D-16 + D-17 are structurally satisfied (offscreen owns buffer; long-lived port keeps SW alive; `hasDocument()` + CR-03 handshake fix on SW respawn). Real MV3 SW lifecycle behavior cannot be driven in Vitest. Verification path: DevTools → Extensions → Service Worker → "Force stop" → wait 60 s → click extension save → confirm exported archive contains video segments from before "Force stop". (VALIDATION.md §"Manual-Only Verifications" row 3.)
|
||||
|
||||
These three items are Phase 4's territory per ROADMAP.md (Phase 4 success criteria #2 and #4 in particular). This verifier does NOT classify them as Phase 1 gaps — Phase 1's `human_needed` status is the correct routing: ship Phase 1 as DELIVERED in code, hand the operator-side checks to Phase 4 smoke.
|
||||
|
||||
---
|
||||
|
||||
## Gaps Summary
|
||||
|
||||
No gaps. Phase 1's goal — "the video ring buffer captures the most recent 30 s of the active tab's video continuously across tab switches, with a playable WebM header retained — so that on export the assembled `last_30sec.webm` will play" — is achieved by the wired codebase:
|
||||
|
||||
- **30 s buffer:** `MAX_SEGMENTS=3 × SEGMENT_DURATION_MS=10_000 = 30_000` ms enforced in production (`onSegmentStopped:352-355`) AND pinned by tests (`segment-rotation.test.ts:84-104`, "caps at MAX_SEGMENTS — 4th push evicts the oldest", "many pushes never exceed the cap").
|
||||
- **Continuous across tab switches:** Amended D-01/D-15 semantics under `getDisplayMedia` — no per-tab handlers exist, single MediaStream retained across MediaRecorder rotations (recorder.ts:46 comment + grep evidence).
|
||||
- **Playable WebM:** D-13 restart-segments — each segment self-contained with own EBML header + seed keyframe (`startNewSegment:252-302` constructs fresh MediaRecorder per rotation); empirically verified by ffmpeg dry-run exit 0 + 0 packet errors + 0 ended-prematurely.
|
||||
- **Assembled `last_30sec.webm` plays:** Empirical fixture `tests/fixtures/last_30sec.webm` (1.6 MB) passes both D-12 (ffprobe) and A3 (ffmpeg) gates, operator-confirmed Chrome playback on 2026-05-15.
|
||||
|
||||
The two architectural escalations encountered mid-phase (D-12 binary transfer + A3 keyframe orphan-P-frame) were both anticipated as HIGH-risk in RESEARCH.md and resolved by pre-staged fallbacks (base64 wire format + D-13 restart-segments); both fallbacks are now production code and pinned by tests.
|
||||
|
||||
---
|
||||
|
||||
_Verified: 2026-05-16T09:11:33Z_
|
||||
_Verifier: Claude (gsd-verifier)_
|
||||
_Verified: 2026-05-20T12:25:00Z by Claude (gsd-verifier)_
|
||||
|
||||
Reference in New Issue
Block a user