# BRIEFING — 2026-10-08T09:00:00Z

## Mission
Review and adversarial stress-test Milestone 5 work products (Episode 1 Feature Assembly & Audio Continuity Pipeline Hardening) against integrity, correctness, edge cases, and test results.

## 🔒 My Identity
- Archetype: teamwork_preview_reviewer
- Roles: reviewer, critic
- Working directory: c:\Projects\KieuStory\.agents\teamwork\reviewer_m5_2
- Original parent: f9992164-c0e4-4f7d-ba4a-25a83a4436bf
- Milestone: Milestone 5 - Full Feature Assembly & Audio Continuity Verification
- Instance: 2 of 2 (Reviewer 2 - Pipeline & Assembly Verification)

## 🔒 Key Constraints
- Review-only — do NOT modify implementation code
- Actively check for integrity violations: hardcoded results, dummy implementations, shortcuts, fabricated outputs, self-certification
- Independent verification via test execution and code inspection
- Deliver verdict: APPROVE or REQUEST_CHANGES

## Current Parent
- Conversation ID: f9992164-c0e4-4f7d-ba4a-25a83a4436bf
- Updated: 2026-10-08T08:56:00Z

## Review Scope
- **Files to review**:
  - `05_Production_Pipeline/assemble_ep01_feature.py`
  - `05_Production_Pipeline/audio_continuity_engine.py`
  - `PROJECT.md`
  - `tests/test_tier5_pipeline_hardening.py`
  - `.agents/teamwork/worker_m5_1/handoff.md`
- **Interface contracts**: `PROJECT.md`, `AGENTS.md`, `GEMINI.md`, `ORIGINAL_REQUEST.md`
- **Review criteria**: correctness, integrity, adversarial stress testing, silence safety, CLI guards, test suite execution

## Review Checklist
- **Items reviewed**:
  - `05_Production_Pipeline/assemble_ep01_feature.py`: 15 scenes (C01-C15) included, default versioned output `_v1.mp4`, dynamic resolution from `06_Exports/` & `04_Assets/videos/`, `if __name__ == "__main__":` guard, CLI flags `--check`, `--dry-run`, `--output`, `--version`.
  - `05_Production_Pipeline/audio_continuity_engine.py`: `normalize_loudness()` silence handling with `anull` bypass preventing AAC encoder `nan` crash.
  - `PROJECT.md`: Milestone 4 is `DONE`, Milestone 5 is `IN_PROGRESS`.
  - `tests/test_tier5_pipeline_hardening.py`: 20/20 passed.
  - `tests/run_all_tests.py`: 155/155 passed.
  - `tests/test_tier5_creative_hardening.py`: 38/38 passed.
  - Total test suite: 247/247 passed.
- **Verdict**: APPROVE
- **Unverified claims**: None. All claims independently verified.

## Attack Surface
- **Hypotheses tested**:
  - Silence crash hypothesis: pure silence input to loudnorm produces NaN in AAC encoder. Confirmed that `anull` bypass prevents crash.
  - Missing scene assembly abort: executing `assemble_ep01_feature.py` when scene 15 is unrendered cleanly aborts with code 1 instead of producing broken partial cut.
  - Version preference hypothesis: dynamic resolution prioritizes `_v2` over `_v1` over unversioned. Confirmed by `test_f12_03`.
  - CLI execution hypothesis: `--check` and `--dry-run` exit with code 0 without touching media files. Confirmed.
- **Vulnerabilities found**: No blocking defects. Minor edge-case suggestion noted: ensure parent directory exists when custom `--output` path is provided.
- **Untested angles**: Full multi-gigabyte render of Scene 15 (deferred until GPU render execution phase).

## Key Decisions Made
- Confirmed zero integrity violations (no mocking of test scores, no dummy logic, no facade scripts).
- Confirmed full 20/20 test pass for Tier 5 pipeline hardening.
- Confirmed M4 `DONE` and M5 `IN_PROGRESS` in `PROJECT.md`.
- Formulated verdict: APPROVE.

## Artifact Index
- `.agents/teamwork/reviewer_m5_2/DISPATCH.md` — Initial dispatch message
- `.agents/teamwork/reviewer_m5_2/BRIEFING.md` — Situational awareness
- `.agents/teamwork/reviewer_m5_2/progress.md` — Heartbeat and progress tracking
- `.agents/teamwork/reviewer_m5_2/handoff.md` — 5-component review report