# BRIEFING — 2026-10-09T06:28:30Z

## Mission
Empirically challenge Milestone M3 pipeline verification: verify Start Frame resolution for all 140 shots across Ep01 Scenes 01-10, test Shot Gate retake loop under failing critic scores, execute pytest suites, and deliver empirical verdict.

## 🔒 My Identity
- Archetype: Challenger
- Roles: critic, specialist
- Working directory: c:\Projects\KieuStory\.agents\teamwork\challenger_m3_1
- Original parent: 97faf5e5-a830-491c-b78c-2af12175badf
- Milestone: M3 Gate Verification
- Instance: 1 of 1

## 🔒 Key Constraints
- Review-only — do NOT modify implementation code
- Run verification code empirically — do NOT trust worker's claims or logs
- .agents/teamwork/ holds only metadata (no source/test code inside .agents/teamwork/)

## Current Parent
- Conversation ID: 97faf5e5-a830-491c-b78c-2af12175badf
- Updated: 2026-10-09T06:16:18Z

## Review Scope
- **Files to review**:
  - 05_Production_Pipeline/production_orchestrator.py
  - 05_Production_Pipeline/critic_gate.py / antigravity_critic_gate.py
  - 05_Production_Pipeline/run_shot.py
  - episodes/ep01/prompts/muse_prompts.json
  - 02_AI_Prompts/gemini_banana_prompts.json
  - 02_AI_Prompts/muse_ai_video_prompts.json
  - tests/test_production_pipeline_m3.py
  - tests/test_critic_gate.py
  - tests/test_m3_challenger1_probe.py
- **Interface contracts**: PROJECT.md, AGENTS.md, GEMINI.md, ORIGINAL_REQUEST.md
- **Review criteria**: Empirical verification, Start Frame 140-shot resolution, Shot Gate retake loop robustness, test suite execution

## Attack Surface
- **Hypotheses tested**:
  - Hypothesis 1 (Physical File Resolution): All 140 shots resolve to valid, readable, physical 720p image files on disk -> CONFIRMED (140/140 files exist and decode).
  - Hypothesis 2 (Shot Gate Retake Loop Robustness): When Critic score < 0.8, retakes increment version (_v1 -> _v2 -> _v3), append critique notes to prompt, and terminate on approval or max_retakes -> CONFIRMED empirically via synthetic file generator.
  - Hypothesis 3 (Character Invariant & Bilateral Safeguards): All character shots resolve to their intended portraits with 0% Thúy Kiều leakage -> REFUTED (Found character leakage in Scene 03 shots 03 and 05).
- **Vulnerabilities found**:
  - Defect 1: `ep01_scene03_shot05` (Title: "Thúy Vân đứng dậy gọi chị (Medium Shot Thúy Vân)") has hardcoded `"character_asset_ref": "04_Assets/characters/01_Main_Protagonists/thuy_kieu_maiden_16yo_720p.png"`, resolving to Thúy Kiều instead of Thúy Vân.
  - Defect 2: `ep01_scene03_shot03` (Title: "Đặc tả vẻ đẹp Thúy Vân (Close-Up Portrait Thúy Vân)") has missing `character_asset_ref` and `gemini_banana_prompts.json` has `character_anchor: "thuy_kieu_maiden"`, resolving to Thúy Kiều instead of Thúy Vân.
  - Defect 3: `production_orchestrator.py:resolve_start_frame` uses `title_tv_only = ("thúy vân" in combined and "thúy kiều" not in combined)`. Because the room name is `NỘI. KHUÊ PHÒNG THÚY KIỀU & THÚY VÂN`, the string `thúy kiều` is always present in `combined`, defeating the Thúy Vân title detection heuristic and preventing bilateral safeguard overrides.
- **Untested angles**:
  - Live Meta Muse cloud browser sessions (offline dry-run verified).

## Loaded Skills
- None required

## Key Decisions Made
- Executed empirical test suites (`test_production_pipeline_m3.py`, `test_critic_gate.py`, `test_m2_hygiene.py`, `test_m1_challenger2_probe.py`).
- Authored and executed empirical stress test suite `tests/test_m3_challenger1_probe.py`.
- Formulated verdict: `REQUEST_CHANGES` due to character asset leakage in Scene 03.

## Artifact Index
- DISPATCH.md — incoming dispatch instructions
- BRIEFING.md — persistent situational awareness
- progress.md — liveness heartbeat
- handoff.md — empirical challenge report and verdict
- tests/test_m3_challenger1_probe.py — executable empirical test suite with reproducible xfail test