# Mokosh

## What This Is

Mokosh is a Chrome Manifest V3 browser extension that silently and continuously
records an operator's browser session — the last 30 seconds of active-tab video,
the last 10 minutes of DOM events (via rrweb), and the last 10 minutes of user
and runtime events — and, on a single button press, packages everything plus a
screenshot into a self-contained ZIP delivered to the user's "Downloads" folder
for handoff to support.

The name is taken from Mokosh (Мокошь), the Slavic goddess of fate and weaving:
each operator session is a thread she weaves into the archive.

## Core Value

When an operator hits a bug, one click MUST produce a self-contained archive
that lets support reproduce what happened — in under five seconds, with no
server involved, and with the operator's passwords never appearing in the
output.

## Requirements

### Validated

<!-- Shipped and confirmed valuable. -->

**Validated in Phase 1 (closed 2026-05-20 via verifier audit GREEN 17/17 must-haves):**
- [x] Continuous 30 s whole-desktop video ring buffer (REQ-video-ring-buffer; D-13 restart-segments)
- [x] Exact manifest permission set per SPEC §7 + DEC-011 Amendment 1 (REQ-manifest-permissions)
- [x] Extension installs unpacked into Chrome without errors (REQ-install-clean)

**Validated in Phase 2 (closed 2026-05-20 via verifier audit PASSED 5/5 must-haves; T5 override per saved memory):**
- [x] One-shot screenshot at export time (REQ-screenshot-on-export; A28 archive layout)
- [x] Russian-language popup with SAVE-only state machine (REQ-popup-ui; A24 + A25)
- [x] ZIP archive layout `session_report_YYYY-MM-DD_HH-MM-SS.zip` with 5-entry shape (REQ-archive-layout; A28 set-equality)
- [x] `meta.json` 8-field schema with `urls: string[]` + `schemaVersion: '2'` per D-P2-02 + D-P2-03 (REQ-meta-json-schema; A26 + A27)
- [x] Click-to-SAVE latency < 5 s via Blob URL pipeline per D-P2-01 (REQ-archive-export-latency; A25 closes audit P0-6)

**Validated in Phase 3 (closed 2026-05-20 via verifier audit PASSED 5/5 ROADMAP + 9/9 SPEC §10 acceptance criteria; 4 overrides incl. §10 #9 user ack):**
- [x] 10 min / 5 000-event rrweb DOM buffer (REQ-rrweb-dom-buffer; A29 harness coverage verifies DOM events captured without errors on probe HTML — form + table + modal; masking deferred per DEC-004 Amendment + charter shift)
- [x] 10 min user/runtime event log (REQ-user-event-log; A30 harness coverage verifies all 5 UserEvent types — click + input + navigation + js_error + network_error; password filtering verified via A31 PARTIAL per D-P3-02 charter)
- [x] SPEC §10 full acceptance criteria sweep #1-#9 — Phase 1 (§10 #1/#2/#3/#7) + Phase 2 (§10 #6) + Phase 3 (§10 #4/#5/#8 PARTIAL/#9 best-effort) — 03-VERIFICATION.md aggregates evidence with T5 override pattern

**Validated in Phase 4 (closed 2026-05-26 via executor-created aggregator 04-VERIFICATION.md; pending independent gsd-verifier audit + closure-ceremony marker flips):**
- [x] All 4 ROADMAP success criteria CLOSED (SC #1 SW state persistence via Plan 04-08 methodology reframe — HTMLVideoElement.captureStream replaces canvas.captureStream; 1.8 MB videoSize vs 8505 baseline; SC #2 fetch + XHR network_error empirical via Plan 04-05 A34 — 2 entries with meta.status===404; SC #3 generate-icons ESM/CJS via Plan 04-02 `git mv .js → .cjs`; SC #4 dead-code grep via Plan 04-02 tests/build/dead-code-grep.test.ts regression pin)
- [x] All 3 audit P1 polish items CLOSED (P1 #11 fetch URL extraction + P1 #14 navigation URL tracking + P1 #15 rrweb timestamp normalization — all via Plan 04-01 D-P4-02 single dedicated TDD plan; src/content/index.ts surgical edits + 9 unit tests at NEW tests/content/ directory)
- [x] All 6 cross-cutting hardening items GREEN (setimmediate polyfill 4-mechanism mitigation via Plan 04-02; A29 cs-injection-world rewrite via Plan 04-03 — 5/5 PASS stress vs ~2/3 historical; cursor visibility regression-pinned via Plan 04-06 — shipped opportunistically by Plan 01-09; dark-surface logo contrast via Plan 04-06 — currentColor + DOMParser inline-SVG + NEW `--mks-mark-stroke` brand-component token decoupled from theme-flipping `--mks-fg-inverse` semantic token)
- [x] D-P4-02 + D-P4-03 + D-P4-05 charters CLOSED (D-P4-02 all 3 audit P1 polish items via Plan 04-01; D-P4-03 both visual polish items via Plan 04-06; D-P4-05 ROADMAP backfill verification for Plans 01-08..01-14 via Plan 04-07). D-P4-01 + D-P4-04 honored throughout (D-P4-01 full Phase 4 scope; D-P4-04 alpha out-of-band).
- [x] Cross-cutting gates: UAT harness 33 → 36 GREEN (+A33 + A34 + A35 with 5 sub-checks incl. A35.5 light+dark equality decouple-proof); vitest 171 → 188 GREEN (+17 tests across Plans 04-01/02/06/08); pre-checkpoint bundle gates 6/6 PASS (Gate 2 polarity flipped 1 → 0 via Plan 04-02 — closes Plan 01-12 Wave 7 setimmediate deferred-items entry end-to-end); Tier-1 FORBIDDEN_HOOK_STRINGS unchanged at 12; NEW Tier-2 production-bundle filename-leak gate added by Plan 04-08
- [x] /gsd-debug sessions: 3 documented + resolved (canvas-throttling sessions 1+2 → REFUTED-architecture verdict authorizing Plan 04-08 insertion; Plan 04-06 dark-mode mark decoupling → fix at commit a8bcc17; A33.1 SAVE-ack race → fix at commit 7e0da63)
- [x] Operator-empirical ack 2026-05-26 verbatim "Confirmed fixed — close Plan 04-06" (Plan 04-06 Task 4 cycle-2 after debug-fix; canonical aesthetics-judgment-is-non-automatable case per `feedback-trust-harness-over-manual-uat.md`)

### Active

<!-- Current scope. Building toward these. See REQUIREMENTS.md for IDs. -->

**Phase 4 closure ceremony (post Plan 04-07):**
- Independent gsd-verifier audit of `.planning/phases/04-harden-clean-up-optional/04-VERIFICATION.md` (Phase 1-3 precedent — verifier re-validates executor-created aggregator with goal-backward audit)
- ROADMAP.md Phase 4 row `[ ]` → `[x]` flip + CLOSED 2026-05-26 annotation
- STATE.md `progress.completed_phases: 3 → 4` + `progress.percent: 97 → 100` + `status: executing → completed` flip
- v1.0 tag + release notes + alpha redistribution (separate workstream per D-P4-04 charter — user-routed out-of-band)

**Deferred to v1.1 / v2 maintenance milestones:**
- rrweb 2.0.0-alpha.4 → stable v2 upgrade (D-P3-03 + D-P4-01 charter; alpha-pin stable across all 31 plans + 36/36 UAT GREEN)
- Programmatic SW-context RAM measurement via chrome.devtools.Memory API (D-P3-04 + D-P4-01 charter; A32 best-effort + chrome://memory-internals + alpha distribution coverage accepted)
- REQ-password-confidentiality v2 candidate (D-P3-02 charter shift 2026-05-20 — only revisit if charter reverses on "we don't care about privacy hardening")
- A29/A30/A31 cs-injection-world flake family (intermittent in full-suite runs; A29 specifically CLOSED via Plan 04-03 strict-sentinel; A30/A31 NOT in Plan 04-03 charter)
- 04-CONTEXT #9/#10 parallel-vitest ffprobe-timeout flake family (true clean baseline corrected to 188/188 GREEN; canonical Vitest mitigation: poolOptions.threads.singleThread:true OR raised testTimeout)

### Out of Scope

<!-- Explicit boundaries. Includes reasoning to prevent re-adding. -->

- Server upload of captured data — SPEC §9; reserved for Phase 2.
- AI-driven diagnostics — SPEC §9; reserved for Phase 2.
- Automatic ticket creation — SPEC §9; reserved for Phase 2.
- Analytics dashboard — SPEC §9; reserved for Phase 2.
- Audio recording — SPEC §9; reserved for Phase 2.
- Persisting rolling buffers to `chrome.storage` / IndexedDB — CON-buffer-storage;
  buffers are in-memory only in Phase 1.

## Context

- **Source documents:** Russian-authored SPEC (`Тз расширение фаза1.md`) and a
  Russian-authored README. All user-facing UI strings ("Сохранить отчёт об
  ошибке", "Последние 30 сек видео + 10 мин лога", "Сохраняю...", "Готово! ✓")
  are part of the contract and MUST be preserved verbatim. Section identifiers
  and code use Latin script.
- **Codebase state:** A partially-broken first attempt at the SPEC already
  exists under `src/` (background service worker, content script, popup) and
  `offscreen/`. An external audit identified 7 P0 defects that prevent SPEC §10
  acceptance. Phase 1 of this roadmap is remediation against the SPEC, not
  greenfield. See ROADMAP.md.
- **Operator context (SPEC §1):** Operators work inside a browser and
  periodically make mistakes that are hard to diagnose after the fact. The
  extension runs silently in the background; the operator only interacts with
  it when they need to file a report.
- **Build toolchain (DOC-only):** Vite + the `crxjs` plugin in TypeScript. The
  SPEC does not prescribe a build tool, so this is auto-overridable by a future
  ADR/SPEC.

## Constraints

- **Performance**: Click-to-archive-on-disk < 5 s (CON-archive-export-latency,
  SPEC §10 #6) — drives synchronous Blob assembly and avoidance of base64 data
  URLs.
- **Memory**: Background RAM ceiling 50 MB (CON-ram-ceiling, SPEC §10 #9).
  Expected steady-state is ~3–10 MB; the ceiling is a hard upper bound, not a
  target.
- **Video format**: `video/webm; codecs=vp9` @ 400 000 bps, `MediaRecorder`
  timeslice 2000 ms, single continuous recorder (CON-video-codec). The first
  chunk (WebM header) MUST be retained indefinitely (CON-webm-header-retention,
  DEC-009) — without it, the assembled file is not playable.
- **Buffer windows**: Video 30 s rolling, rrweb 10 min / 5 000 events whichever
  is tighter, user-event log 10 min (CON-video-window, CON-rrweb-window,
  CON-event-log-window).
- **Sensitive data**: ~~`input[type=password]` and `[data-sensitive="true"]` MUST
  be masked in rrweb (via v2 `maskInputFn`) AND the event logger MUST drop
  password field values (CON-sensitive-data-masking).~~ **DEFERRED 2026-05-20**
  per charter shift ("we don't care about privacy hardening. At least here.").
  Archive flow is internal-only (no external transmission); CON-sensitive-data-
  masking re-classified as Phase 4 optional hardening or v2 work. Operator-
  facing password masking remains a future polish item but is no longer v1-blocking.
- **Service Worker lifecycle**: MV3 SW unloads after ~30 s idle; a long-lived
  `chrome.runtime.connect` port from offscreen to SW emits a PING every 25 s
  to keep the SW alive (CON-display-capture-binding, AMENDED from
  CON-service-worker-keepalive).
- **Tab capture binding**: REMOVED (CON-tab-capture-binding RETIRED). The new
  `getDisplayMedia` binding (CON-display-capture-binding) is screen/window-
  scoped, not tab-scoped, and survives tab switches without re-attach.
- **Manifest permissions**: ~~`tabCapture`, `activeTab`, `downloads`,
  `scripting`, `storage`~~ **SUPERSEDED by DEC-011 Amendment 1 (2026-05-20).**
  Current locked set: `desktopCapture`, `activeTab`, `tabs`, `downloads`,
  `scripting`, `storage`, `offscreen`, `notifications`;
  `host_permissions: ["<all_urls>"]` — exactly this set, no more, no less
  (CON-manifest-permissions, post-Phase-01 retirement of `tabCapture` per
  DEC-003 Amendment + addition of `desktopCapture` + `offscreen` +
  `notifications`; Phase 2 Amendment 1 adds `tabs` per D-P2-02). See Key
  Decisions table DEC-011 row for full provenance.
- **Storage strategy**: All Phase 1 rolling buffers live in memory only
  (CON-buffer-storage). `chrome.storage` is permitted but MUST NOT be used to
  persist rolling buffers.
- **Network**: No server upload in Phase 1 (CON-no-server-upload). All export
  is local-only via `chrome.downloads`.

## Key Decisions

<!-- Decisions that constrain future work. All 12 below are SPEC-Accepted
     acting as ADR-equivalents for Phase 1 per orchestrator instruction. They
     are LOCKED for Phase 1: any change requires a formal ADR. None are
     formally LOCKED in the ingest classification — a future ADR can revise
     any of them, but Phase 1 implementation MUST treat them as locked. -->

| Decision | Rationale | Outcome | Status |
|----------|-----------|---------|--------|
| **DEC-001**: Chrome Extension Manifest V3 | SPEC §2, §7 — required for `chrome.tabCapture`, `chrome.downloads`, `chrome.alarms`. | — Pending | locked (Phase 1) |
| **DEC-002**: Service Worker as background coordinator | SPEC §2, §3, §8 — MV3 has no persistent background page; SW coordinates video buffer + archive packaging. | — Pending | locked (Phase 1) |
| **DEC-003**: Active video via `getDisplayMedia()` (vp9 / 400 kbps / 2000 ms) | AMENDED by Phase 01: SPEC §2/§4.1/§7 originally specified `chrome.tabCapture`; Phase 01 swaps to `getDisplayMedia` invoked in the offscreen document with `chrome.offscreen.Reason.DISPLAY_MEDIA`. Codec/bitrate/timeslice binding unchanged. See `.planning/intel/decisions.md` DEC-003 Amendment. | — Pending | locked (Phase 1, post-Amendment) |
| **DEC-004**: DOM capture via rrweb with 5 000-event cap. ~~`maskInputSelector` masking~~ DEFERRED 2026-05-20 — `maskInputSelector` was rrweb 1.x; v2.0.0-alpha.4 requires `maskInputFn`. Per 2026-05-20 charter shift, masking deferred to Phase 4 (optional) or v2; AMENDED to "rrweb 5000-event cap; masking deferred". | SPEC §2, §4.2 — rrweb is the only mature DOM-recording option; cap is part of the memory contract; masking originally part of privacy contract (deferred). | — Pending | locked (Phase 1, post-Amendment) |
| **DEC-005**: Archive packaging via JSZip | SPEC §2, §3, §6 — only ZIP library bundled per SPEC. | — Pending | locked (Phase 1) |
| **DEC-006**: File download via `chrome.downloads` | SPEC §2, §5, §7 — no server upload in Phase 1 (SPEC §9). | — Pending | locked (Phase 1) |
| **DEC-007**: In-memory buffers only (no Phase 1 persistence) | SPEC §2, §4.1–§4.3 — rolling buffers in SW (video) and Content Script (rrweb + log). | — Pending | locked (Phase 1) |
| **DEC-008**: Screenshot via `chrome.tabs.captureVisibleTab` | SPEC §4.4, §5 — captured at export time, not continuously. | — Pending | locked (Phase 1) |
| **DEC-009**: WebM header chunk retained indefinitely | SPEC §4.1, §8 — WebM without its header is not playable. | — Pending | locked (Phase 1) |
| **DEC-010**: Service Worker keepalive via long-lived port | AMENDED by Phase 01: SPEC §8 originally specified `chrome.alarms` at 20 s; Phase 01 swaps to a `chrome.runtime.connect` port between offscreen and SW with 25 s ping cadence and 290 s pre-emptive reconnect. See `.planning/intel/decisions.md` DEC-010 Amendment. | — Pending | locked (Phase 1, post-Amendment) |
| **DEC-011**: Manifest permissions set | AMENDED 2026-05-20 (Amendment 1) by Plan 02-03: SPEC §7 originally specified `tabCapture`, `activeTab`, `downloads`, `scripting`, `storage` + `host_permissions: ["<all_urls>"]`. Phase 01 retired `tabCapture` (DEC-003 Amendment) and added `desktopCapture`, `offscreen`, `notifications`. Amendment 1 (2026-05-20) ADDS `tabs` to enable `chrome.tabs.get(tabId).url` + `chrome.tabs.query({})` for the Phase 2 D-P2-02 `meta.urls` feature (tab-url-tracker requires URL visibility beyond active-tab semantics). Current locked set: `desktopCapture`, `activeTab`, `tabs`, `downloads`, `scripting`, `storage`, `offscreen`, `notifications` + `host_permissions: ["<all_urls>"]`. Audit T-1-02 ("unused permissions expand attack surface") is acknowledged but overridden — the permission is genuinely USED by the meta.urls feature, so it is not unused. See `.planning/phases/02-stabilize-export-pipeline/02-CONTEXT.md` Revision Log. | — Pending | locked (Phase 1, post-Amendment 1) |
| **DEC-012**: Vite + crxjs + TypeScript build toolchain | README §"Технический стек" — DOC-level only; SPEC does not prescribe. | — Pending | locked (Phase 1) — auto-overridable by future ADR |

## Success Metric (Developer-Facing)

Phase 1 is "done" when all **9 SPEC §10 acceptance criteria** pass against an
unpacked load of the build into Chrome:

1. Extension installs in Chrome without errors.
2. Video buffer runs continuously on any tab.
3. Buffer never holds more than 30 s of footage.
4. rrweb records DOM events without errors on typical pages (forms, tables,
   modals).
5. Event log captures clicks, navigation, and network errors.
6. Archive downloads to "Downloads" in < 5 s after button press.
7. Archive opens cleanly; `last_30sec.webm` plays back in a browser.
8. Passwords do not appear in the event log or rrweb snapshots.
9. Extension RAM consumption does not exceed 50 MB in the background.

The verbatim list lives in REQUIREMENTS.md under "Phase 1 Acceptance Criteria
(SPEC §10 verbatim)".

---
*Last updated: 2026-05-26 — Phase 4 closure aggregator created via Plan 04-07 (`.planning/phases/04-harden-clean-up-optional/04-VERIFICATION.md`; 253 lines; 4/4 ROADMAP SC + 3/3 audit P1 + 6/6 hardening items GREEN; UAT 36/36 + vitest 188/188 + 6/6 bundle gates + Tier-1=12 + NEW Tier-2; 3 /gsd-debug sessions; operator empirical ack "Confirmed fixed — close Plan 04-06" 2026-05-26). Phase 4 row [x] flip + completed_phases 3→4 + status:completed flip DEFERRED to closure ceremony after independent gsd-verifier audit (Phase 1-3 precedent). Prior: 2026-05-20 Phase 3 closure (verifier audit PASSED 5/5 ROADMAP + 9/9 SPEC §10 with 4 overrides); 2026-05-20 Phase 2 closure; 2026-05-15 initial bootstrap.*