# Roadmap: Mokosh

## Overview

The Mokosh codebase is a partially-broken first attempt at SPEC `Тз расширение
фаза1.md`. An external audit identified 7 P0 defects that prevent SPEC §10
acceptance. This roadmap therefore frames Phase 1 as **stabilization to spec**,
not greenfield: phases 1–3 each remediate a tightly-grouped subset of the P0
defects along sensible commit boundaries; phase 4 runs the SPEC §10 smoke pass
end-to-end. An optional phase 5 absorbs the P1/P2 follow-ups (SW state
persistence, `fetch` interception fix, `meta.json` field hardening,
`generate-icons.js` ESM/CJS, dead-code cleanup).

The journey: **broken-but-installable → playable video → masked DOM + log →
working export → green §10 smoke → harden + clean up**.

## Phases

**Phase Numbering:**
- Integer phases (1, 2, 3): Planned milestone work.
- Decimal phases (2.1, 2.2): Urgent insertions (marked with INSERTED).

Decimal phases appear between their surrounding integers in numeric order.

- [x] **Phase 1: Stabilize video pipeline** — Collapse offscreen duality, fix MediaRecorder shadow, fix WebM ring buffer playability, replace `chrome.tabCapture` with offscreen `getDisplayMedia` (AMENDED from original DEC-003). **Closed 2026-05-15** — D-12 ffprobe gate + A3 empirical-playback gate both green against `tests/fixtures/last_30sec.webm` (1.6 MB VP9 1142×1038); D-13 restart-segments retired D-09..D-11 mid-phase; 30/30 vitest green, tsc clean. SPEC §10 #2, #3, #7 functionally satisfied (end-to-end Phase 4 smoke remains owner of §10).
- [ ] **Phase 2: Stabilize DOM + event capture privacy** — Migrate rrweb to v2 `maskInputFn`, plug `content/index.ts setupInputLogging` password leak
- [ ] **Phase 3: Stabilize export pipeline** — Restore user-activation gesture in popup, delete dead `permissions.request`, replace base64 `data:` URL with Blob URL minted in offscreen
- [ ] **Phase 4: SPEC §10 smoke verification** — End-to-end install-and-record-and-export pass against all 9 acceptance criteria
- [ ] **Phase 5: Harden + clean up** _(optional)_ — P1/P2 follow-ups: SW state persistence, fetch interception, `meta.json` fields, `generate-icons.js` ESM/CJS, dead-code

## Phase Details

### Phase 1: Stabilize video pipeline
**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.

**Depends on**: Nothing (first phase). Operates on the existing `offscreen/`
directory + `vite.config.ts` inline string + `src/background/`.

**Requirements**: REQ-video-ring-buffer

**P0 defects addressed**:
- P0-1: Collapse the offscreen duality (`offscreen/index.ts` + inline string in
  `vite.config.ts`) into a single source of truth; fix the `mediaRecorder`
  shadow that breaks `stopRecording`.
- P0-2: Fix WebM ring buffer playability — single continuous `MediaRecorder`,
  2000 ms timeslice per spec (CON-video-codec), cluster-timestamp-based rolling
  window honouring the WebM header retention rule (DEC-009).
- P0-3: Make capture always-on with `chrome.tabs.onActivated` /
  `chrome.tabs.onUpdated` re-attachment; start on `onInstalled` / `onStartup`,
  not on popup open (CON-tab-capture-binding, REQ-video-ring-buffer).

**Success Criteria** (what must be TRUE):
  1. [x] There is exactly one source of truth for the offscreen document; rebuilding
     `vite.config.ts` does not regenerate a divergent inline duplicate, and
     `stopRecording` runs without `mediaRecorder is undefined` shadow errors.
  2. [x] With the extension loaded and an operator session active, a `MediaRecorder`
     is running on the operator-selected screen/window source. AMENDED 2026-05-15
     (D-13 fix-a3 activation): the recorder cycles in 10 s self-contained segments
     (stop+restart on the same `MediaStream`) instead of a single continuous
     recorder — replaces D-09..D-11 to fix VP9 keyframe orphan-P-frame freezes.
     Recording continues unchanged across tab switches (no tab re-attach logic;
     AMENDED from the original wording).
  3. [x] The in-memory video ring buffer at any instant contains at most 3 of the
     most recent 10 s WebM segments (3 × 10 s = 30 s window, no more, no less);
     concatenating segments sequentially yields a multi-EBML-header WebM that
     Chrome plays end-to-end (SPEC §10 #7 — operator confirmed clean playback
     2026-05-15; ffmpeg `-v warning -i fixture -f null -` exit 0 with zero
     decoder errors, only expected muxer DTS-monotonicity warnings at segment
     join boundaries).

**Plans**: 7 plans
- [x] 01-01-PLAN.md — Doc cascade: amend DEC-003 / DEC-010 / RETIRE constraints / swap manifest permissions (D-A1..D-A6)
- [x] 01-02-PLAN.md — Wave-0 test infrastructure: Vitest install + 4 RED test files + fixtures placeholder
- [x] 01-03-PLAN.md — Offscreen recorder TDD: ring buffer + codec strict-mode + getDisplayMedia + track-ended cleanup; D-13 fallback skeleton pre-staged
- [x] 01-04-PLAN.md — Port keepalive + OFFSCREEN_READY handshake (TDD): replaces alarms keepalive on offscreen side
- [x] 01-05-PLAN.md — SW shrink: delete legacy buffer + alarms + IndexedDB + tabCapture paths; wire SW-side onConnect host
- [x] 01-06-PLAN.md — Build pipeline collapse: delete vite.config.ts inline plugin + top-level offscreen/ dir; declare rollupOptions.input
- [x] 01-07-PLAN.md — Manual smoke + ffprobe D-12 acceptance gate + A3 empirical-playback gate; D-12 + A3 debug sessions resolved mid-execution via pre-staged base64 wire format + D-13 restart-segments; regression fixture committed; SPEC §10 #2/#3/#7 functionally green (Closed 2026-05-15)

### Phase 2: Stabilize DOM + event capture privacy
**Goal**: rrweb captures DOM events on typical pages and the user-event log
captures clicks/navigation/network errors — and in neither stream do password
values appear.

**Depends on**: Phase 1 (no functional dependency, but Phase 1 establishes the
"capture is always-on" baseline that this phase plugs into).

**Requirements**: REQ-rrweb-dom-buffer, REQ-user-event-log,
REQ-password-confidentiality

**P0 defects addressed**:
- P0-5: rrweb data-sensitive leak — migrate to rrweb v2 `maskInputFn` (the
  legacy `maskInputSelector` is gone in v2.0.0-alpha.4 per `package.json`); fix
  the parallel leak in `src/content/index.ts setupInputLogging` so password
  field values are dropped at logger entry, not just at rrweb level.

**Success Criteria** (what must be TRUE):
  1. On a page containing `<input type="password">` and elements with
     `data-sensitive="true"`, rrweb snapshots for that page mask the value of
     both kinds of fields (verified by inspecting exported `rrweb/session.json`).
  2. On the same page, typing into a password field produces no `input` event
     entry containing the typed value in the user-event log
     (`logs/events.json`).
  3. On a typical page with forms, tables, and a modal, rrweb records DOM
     events without throwing in the Content Script console; the event log
     captures clicks, navigations (`popstate`/`hashchange`), and network errors
     (`fetch` / `XHR` >= 400).

**Plans**: TBD
**UI hint**: yes

### Phase 3: Stabilize export pipeline
**Goal**: A click on "Сохранить отчёт об ошибке" produces a SPEC-conformant ZIP
archive on disk in under 5 s, containing a screenshot taken at click time,
laid out per CON-archive-layout, with `meta.json` per CON-meta-json-schema, and
declared by a manifest carrying exactly the permission set in DEC-011.

**Depends on**: Phase 1, Phase 2 (export consumes the video + rrweb + event-log
buffers established by phases 1 and 2).

**Requirements**: REQ-popup-ui, REQ-screenshot-on-export, REQ-archive-layout,
REQ-meta-json-schema, REQ-archive-export-latency, REQ-manifest-permissions

**P0 defects addressed**:
- P0-4: Restore the user-activation gesture for `getMediaStreamId` by moving
  the call to the popup-click handler; delete the dead `permissions.request`
  dance that was masking the missing gesture (REQ-popup-ui,
  CON-tab-capture-binding).
- P0-6: Replace the base64 `data:` URL download with a Blob URL minted in the
  offscreen document — the Service Worker lacks `URL.createObjectURL` (DEC-006,
  REQ-archive-export-latency).

**Success Criteria** (what must be TRUE):
  1. Opening the popup shows a button reading "Сохранить отчёт об ошибке" with
     sub-label "Последние 30 сек видео + 10 мин лога"; clicking it transitions
     idle → "Сохраняю..." → "Готово! ✓" → idle (with 3 s revert) and triggers
     a `chrome.downloads` download.
  2. The downloaded file lands in the user's Downloads folder, named
     `session_report_YYYY-MM-DD_HH-MM-SS.zip`, in under 5 seconds from click;
     opening it reveals exactly the layout in REQ-archive-layout
     (`video/last_30sec.webm`, `rrweb/session.json`, `logs/events.json`,
     `screenshot.png`, `meta.json` at the root) with no extra entries.
  3. `meta.json` validates against the verbatim CON-meta-json-schema (all 7
     fields present, types correct, `timestamp` is ISO-8601 with `Z`).
  4. `manifest.json` in `dist/` after `npm run build` declares exactly the
     permission set in DEC-011 with no additional or missing entries; loading
     unpacked into Chrome produces no permission-related warnings or errors in
     `chrome://extensions/`.

**Plans**: TBD
**UI hint**: yes

### Phase 4: SPEC §10 smoke verification
**Goal**: All 9 SPEC §10 acceptance criteria pass against an unpacked load of
the build into a real Chrome instance.

**Depends on**: Phase 1, Phase 2, Phase 3.

**Requirements**: REQ-install-clean (and end-to-end verification of all
preceding REQs)

**P0 defects addressed**:
- P0-7: End-to-end smoke verification against §10. This is a verification
  phase, not a new implementation — it confirms the cumulative output of
  phases 1–3 actually satisfies the SPEC.

**Success Criteria** (what must be TRUE):
  1. The extension installs into Chrome via "Load unpacked" against `dist/`
     with no errors or warnings in `chrome://extensions/`.
  2. With the extension loaded and a normal browsing session under way, the
     video buffer runs continuously across tab switches and never holds more
     than 30 s of footage (confirmed by inspecting the SW console / a debug
     export).
  3. On a typical page (form + table + modal) rrweb records without throwing,
     the event log captures clicks/navigation/network errors, and passwords
     are absent from both streams.
  4. A click on the popup button produces a ZIP in Downloads in under 5 s; the
     ZIP opens; `video/last_30sec.webm` plays in a browser.
  5. Background RAM consumption (measured via Chrome Task Manager) does not
     exceed 50 MB during a sustained recording session (CON-ram-ceiling).

**Plans**: TBD

### Phase 5: Harden + clean up _(optional)_
**Goal**: Eliminate the P1/P2 follow-ups identified in the audit so that the
codebase is not just spec-conformant but maintainable. This phase has no new
v1 requirements — it improves robustness and removes technical debt around
already-shipped behaviour.

**Depends on**: Phase 4 (do not harden until §10 is green).

**Requirements**: none (no new v1 REQs; all v1 REQs are covered by phases 1–4)

**P1/P2 items addressed** (informative list from the audit, exact scope
finalized at plan time):
- SW state persistence around the 30 s idle unload edge cases.
- `fetch` interception fix in the network-error path of REQ-user-event-log.
- `meta.json` field hardening (timestamp source, version source, totalEvents
  derivation).
- `generate-icons.js` ESM/CJS compatibility with the rest of the toolchain.
- Dead-code cleanup (the `permissions.request` dance removed in Phase 3 may
  have stranded helpers; the offscreen duality removed in Phase 1 may have
  stranded shims).
- `getDisplayMedia` cursor visibility constraint (`video: { cursor: 'always' }`)
  — refines capture quality for diagnostic UX; surfaced during Phase 1 smoke
  (2026-05-15) as a user observation. Operator's screen cursor was absent
  from captured frames despite being the highest-signal cue when reproducing
  pointer-driven bugs. Constraint is opt-in per the `getDisplayMedia` spec
  and Chrome implements it via the `CursorCaptureConstraint` enum (`always`
  / `motion` / `never`).

**Success Criteria** (what must be TRUE):
  1. After running the extension idle for >5 minutes, then exporting, the
     archive still contains a non-empty video buffer (proves SW state
     persistence works across one or more SW unload/reload cycles).
  2. A page that issues a failing `fetch` (response code >= 400) produces a
     `network_error` entry in `events.json`; a failing `XMLHttpRequest` does
     too.
  3. `npm run build` and `node generate-icons.js` both succeed under the
     project's module setting (`"type": "module"` in `package.json`) with no
     `require is not defined` or `Cannot use import statement outside a
     module` errors.
  4. A repo grep for the symbols deleted in phases 1 and 3
     (`permissions.request`, the duplicate offscreen inline string) returns no
     live references.

**Plans**: TBD

## Progress

**Execution Order:**
Phases execute in numeric order: 1 → 2 → 3 → 4 → 5.

| Phase | Plans Complete | Status | Completed |
|-------|----------------|--------|-----------|
| 1. Stabilize video pipeline | 7/7 | Complete | 2026-05-15 |
| 2. Stabilize DOM + event capture privacy | 0/TBD | Not started | - |
| 3. Stabilize export pipeline | 0/TBD | Not started | - |
| 4. SPEC §10 smoke verification | 0/TBD | Not started | - |
| 5. Harden + clean up (optional) | 0/TBD | Not started | - |
