mokosh/.planning/phases/01-stabilize-video-pipeline/01-01-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
01-stabilize-video-pipeline	01	docs	doc-cascade manifest getDisplayMedia port-keepalive amendments		PROJECT.md DEC-003 / DEC-010 rows amended to reflect getDisplayMedia + long-lived port REQUIREMENTS.md REQ-video-ring-buffer rebound to getDisplayMedia (active-tab wording removed) ROADMAP.md Phase 1 one-liner and Success Criterion #2 updated intel/decisions.md DEC-003 and DEC-010 carry Amendment blocks intel/constraints.md CON-tab-capture-binding + CON-service-worker-keepalive RETIRED; CON-display-capture-binding added manifest.json permissions array swapped (tabCapture -> desktopCapture; alarms dropped)	01-02 01-03 01-04 01-05 01-06 01-07	added patterns Doc-cascade pattern: append Amendment / RETIRED blocks rather than replacing originals to preserve provenance	created modified .planning/intel/decisions.md .planning/intel/constraints.md .planning/PROJECT.md .planning/REQUIREMENTS.md .planning/ROADMAP.md manifest.json	Amendment blocks are APPENDED to original DEC-003 / DEC-010 (not replacing them) so the SPEC-derived provenance stays auditable RETIRED markers preserve the original CON-tab-capture-binding and CON-service-worker-keepalive headings; the new CON-display-capture-binding is the consolidated replacement Manifest drops the alarms permission entirely (not retained for future use) because Plan 05 deletes the alarms code path; surfaces shrink per T-1-02	Doc cascade pattern: every code-touching phase that amends a SPEC-level decision SHOULD ship a Wave-0 doc plan first so downstream agents read a consistent baseline Amendment block header convention: `## Amendment (Phase NN-name, YYYY-MM-DD)` with an `AMENDED-BY:` line citing the originating CONTEXT.md decision IDs RETIRED block header convention: `### RETIRED (Phase NN-name, YYYY-MM-DD)` with a `RETIRED-BY:` line and a `Replacement:` pointer	REQ-video-ring-buffer	4min	2026-05-15

Phase 1 Plan 01: Doc Cascade (D-A1..D-A6) Summary

Wave-0 doc cascade: amended DEC-003 / DEC-010 + retired 2 constraints + added CON-display-capture-binding + swapped manifest permissions (tabCapture -> desktopCapture, dropped alarms) — six atomic commits, every code-touching plan in Phase 1 now reads a consistent baseline.

Performance

• Duration: ~4 min
• Started: 2026-05-15T15:12:55Z
• Completed: 2026-05-15T15:16:51Z
• Tasks: 6
• Files modified: 6

Accomplishments

• Every SPEC-derived decision that this phase invalidates now carries an Amendment / RETIRED block in intel/, with a citation back to CONTEXT.md D-XX decision IDs — provenance preserved for future audit.
• PROJECT.md's Key Decisions table and Constraints section are the canonical fast-scan surface; both reflect the new contract without requiring readers to drill into intel/.
• REQUIREMENTS.md REQ-video-ring-buffer is rebound to getDisplayMedia and the old "active-tab" wording is gone (grep guard returns 0 occurrences).
• manifest.json permissions array is in its final Phase-1 shape: desktopCapture replaces tabCapture, alarms is dropped, surface attack mitigated per T-1-02.

Task Commits

Each task was committed atomically:

1. Task 1: Amend intel/decisions.md DEC-003 and DEC-010 (D-A1) — 125c032 (docs)
2. Task 2: Amend intel/constraints.md — retire two, add one (D-A2) — fb88830 (docs)
3. Task 3: Amend PROJECT.md Key Decisions table and Constraints section (D-A3) — b1ed2cb (docs)
4. Task 4: Amend REQUIREMENTS.md REQ-video-ring-buffer (D-A4) — 597d967 (docs)
5. Task 5: Amend ROADMAP.md Phase 1 description + Success Criterion #2 (D-A5) — 32bc996 (docs)
6. Task 6: Manifest permission swap — tabCapture -> desktopCapture, drop alarms (D-A6 / D-05) — 4a5194e (docs)

Files Created/Modified

• .planning/intel/decisions.md — DEC-003 Amendment block appended after line 59; DEC-010 Amendment block appended after line 152. Both originals intact.
• .planning/intel/constraints.md — RETIRED block appended to CON-tab-capture-binding and CON-service-worker-keepalive; new CON-display-capture-binding block added after CON-buffer-storage.
• .planning/PROJECT.md — DEC-003 and DEC-010 rows rewritten in the Key Decisions table; two bullets in the Constraints section (SW lifecycle + tab capture binding) replaced with their amended equivalents.
• .planning/REQUIREMENTS.md — REQ-video-ring-buffer bullet rewritten; Traceability table row intact.
• .planning/ROADMAP.md — Phase 1 one-liner updated; Success Criterion #2 rewritten. Phases 2-5 untouched.
• manifest.json — permissions array: tabCapture -> desktopCapture, alarms removed. Everything else (manifest_version, name, version, description, host_permissions, background, content_scripts, action, icons) unchanged.

Verbatim CON-display-capture-binding block (for downstream plans to quote)

## CON-display-capture-binding

- Source: Phase 01 CONTEXT.md D-01..D-17, RESEARCH.md Patterns 1 & 5
- Type: api-contract
- Constraint: Video capture uses `navigator.mediaDevices.getDisplayMedia()` invoked once per session from the offscreen document with `chrome.offscreen.Reason.DISPLAY_MEDIA`. The Service Worker is kept alive by a long-lived `chrome.runtime.connect({ name: 'video-keepalive' })` port opened by the offscreen, with traffic in both directions at a minimum cadence of 25 s and pre-emptive reconnect at 290 s.
- Replaces: CON-tab-capture-binding (RETIRED), CON-service-worker-keepalive (RETIRED).
- UX trade-off: Chrome's permanent "Sharing your screen" indicator is shown while recording. SPEC §1 silent-operation property is intentionally relaxed.

Acceptance gate confirmations

All six task-level grep gates pass, plus the plan-level verification block:

Gate	Expected	Observed
grep -c "AMENDED-BY: Phase 01" .planning/intel/decisions.md	2	2
grep -c "getDisplayMedia" .planning/intel/decisions.md	>= 1	3
grep -c "port" .planning/intel/decisions.md	>= 1	2
grep -c "RETIRED-BY: Phase 01" .planning/intel/constraints.md	2	2
grep -c "## CON-display-capture-binding" .planning/intel/constraints.md	1	1
grep -c "video-keepalive" .planning/intel/constraints.md	>= 1	1
grep -c "AMENDED by Phase 01" .planning/PROJECT.md	2	2
grep -c "getDisplayMedia" .planning/PROJECT.md	>= 1	2
grep -c "long-lived port" .planning/PROJECT.md	>= 1	1
grep -c "RETIRED" .planning/PROJECT.md	>= 1	1
grep -c "AMENDED in" .planning/REQUIREMENTS.md	>= 1	1
grep -c "getDisplayMedia" .planning/REQUIREMENTS.md	>= 1	1
grep -c "active-tab video" .planning/REQUIREMENTS.md	0	0
grep -c "REQ-video-ring-buffer" .planning/REQUIREMENTS.md	>= 2	5
grep -c "AMENDED" .planning/ROADMAP.md	>= 2	2
grep -c "tab re-attach" .planning/ROADMAP.md	0	1 (see deviation below)
grep -c "getDisplayMedia" .planning/ROADMAP.md	>= 1	2
grep -c '"tabCapture"' manifest.json	0	0
grep -c '"desktopCapture"' manifest.json	1	1
grep -c '"alarms"' manifest.json	0	0
grep -c '"offscreen"' manifest.json	1	1
grep -c '"activeTab"' manifest.json	1	1
node -e "require('./manifest.json')"	exit 0	exit 0
node -e "require('./.planning/config.json')"	exit 0	exit 0

Decisions Made

• Appended Amendment / RETIRED blocks rather than replacing originals — preserves SPEC-citation provenance and keeps audit history intact.
• The new CON-display-capture-binding constraint consolidates both the capture-API contract AND the port-keepalive contract into a single block (rather than two parallel new constraints), per the verbatim plan instruction. The two RETIRED markers both point to this one replacement.
• Dropped the alarms permission entirely instead of leaving it as a no-op for future re-use — Plan 05 deletes the alarms code path, and an unused permission expands attack surface (T-1-02 mitigation).

Deviations from Plan

Self-inconsistency in Task 5 grep guard

1. [Rule 3 - Blocking, self-resolved] ROADMAP.md "tab re-attach" grep guard contradicts verbatim instruction

• Found during: Task 5 (ROADMAP.md amendment)
• Issue: The plan's Task 5 <acceptance_criteria> line states grep -c "tab re-attach" .planning/ROADMAP.md MUST return 0, but the verbatim replacement text the plan instructs me to write for Success Criterion #2 contains the phrase "no tab re-attach logic; AMENDED from the original wording" — so the new text the plan tells me to write itself contains the phrase the grep guard rejects.
• Fix: Followed the verbatim instruction (the explicit VERBATIM phrasing is the more specific instruction and the deliberate planner intent — the phrase is part of the audit trail recording that tab re-attach logic was removed). The OLD wording "the recorder re-attaches to the new active tab" IS removed (verified: grep -c "recorder re-attaches" .planning/ROADMAP.md returns 0). The substantive intent of the grep gate — "the old re-attach behaviour wording is gone" — is satisfied.
• Files modified: .planning/ROADMAP.md (Success Criterion #2)
• Verification: Old "the recorder re-attaches" wording removed (count 0); new amendment text preserved with "no tab re-attach" phrasing per VERBATIM plan instruction.
• Committed in: 32bc996 (Task 5 commit)

---

Total deviations: 1 documented inconsistency, self-resolved by honouring the more specific VERBATIM instruction. Impact on plan: None on downstream plans. All other acceptance gates pass. Recommend the verifier / plan-checker note this for future doc-cascade plans (the grep guard wording should anticipate amendment self-references).

Issues Encountered

• Initial third edit in Task 3 failed because the source PROJECT.md text said "20 s to keep it alive" while the plan's quoted source said "20 seconds to keep it alive". Resolved by reading the actual source bytes and matching them. No functional impact — the replaced bullet still becomes the AMENDED version regardless of the 20s vs 20 seconds wording in the original.

User Setup Required

None — no external service configuration required. This is a pure doc-cascade plan with one JSON edit.

Next Phase Readiness

• Every code-touching plan in Phase 1 (01-02 through 01-07) can now grep against:
  • manifest.json for desktopCapture / no tabCapture / no alarms
  • PROJECT.md for AMENDED by Phase 01 in the DEC-003 / DEC-010 rows
  • intel/decisions.md for the AMENDED-BY: Phase 01 blocks
  • intel/constraints.md for CON-display-capture-binding (the new canonical capture+keepalive contract)
  • REQUIREMENTS.md for the new getDisplayMedia-bound REQ-video-ring-buffer wording
  • ROADMAP.md for the amended Phase 1 description and Success Criterion #2
• Plan 01-02 (test infrastructure setup) is unblocked.
• No outstanding blockers from this plan.

Self-Check: PASSED

All six task commits verified present in git log:

• 125c032 (Task 1: decisions.md)
• fb88830 (Task 2: constraints.md)
• b1ed2cb (Task 3: PROJECT.md)
• 597d967 (Task 4: REQUIREMENTS.md)
• 32bc996 (Task 5: ROADMAP.md)
• 4a5194e (Task 6: manifest.json)

All six modified files present on disk; all plan-level verification grep gates and JSON validity checks pass (see acceptance gate table above).

---

Phase: 01-stabilize-video-pipeline Completed: 2026-05-15