# BRIEFING — 2026-10-09T07:06:15Z

## Mission
Empirically challenge and stress-test the Start Frame resolution across Ep01 (specifically Scene 03 Thúy Vân shots 03 and 05, and 140 shots of Scenes 01 to 10 for cross-character face leakage) and the Shot Gate retake loop in Milestone M3 Iteration 2 Gate Verification.

## 🔒 My Identity
- Archetype: Empirical Challenger
- Roles: critic, specialist
- Working directory: c:\Projects\KieuStory\.agents\teamwork\challenger_m3_iter2_1
- Original parent: 97faf5e5-a830-491c-b78c-2af12175badf
- Milestone: M3 (Iteration 2 Gate Verification)
- Instance: Challenger 1 of 2

## 🔒 Key Constraints
- Review-only — do NOT modify implementation code
- Run verification code empirically; do NOT trust worker claims or logs
- Any defect must be reproducible empirically to count
- Output handoff report to c:\Projects\KieuStory\.agents\teamwork\challenger_m3_iter2_1\handoff.md

## Current Parent
- Conversation ID: 97faf5e5-a830-491c-b78c-2af12175badf
- Updated: 2026-10-09T07:06:15Z

## Review Scope
- **Files to review**:
  - `05_Production_Pipeline/production_orchestrator.py`
  - `02_AI_Prompts/gemini_banana_prompts.json`
  - `episodes/ep01/prompts/muse_prompts.json`
  - `tests/test_m3_challenger1_probe.py`
  - `tests/test_production_pipeline_m3.py`
  - `04_Assets/characters/01_Main_Protagonists/thuy_van_maiden_16yo_720p.png`
  - Worker remediation handoff: `.agents/teamwork/worker_m3_remediation_2/handoff.md`
- **Interface contracts**: `.agents/teamwork/orchestrator_1/PROJECT.md`
- **Review criteria**: Empirical correctness, zero face leakage across 140 shots, shot gate retake behavior, continuous take classification safety.

## Attack Surface
- **Hypotheses tested**:
  1. Scene 03 Thúy Vân shots 03 and 05 resolve to Thúy Vân portrait in `test_m3_challenger1_probe.py`: CONFIRMED (PASS).
  2. All 140 shots resolve statically without Thúy Kiều face leakage: CONFIRMED (PASS).
  3. Shot Gate retake loop triggers and terminates correctly: CONFIRMED (PASS).
  4. Worker claim that `02_AI_Prompts/gemini_banana_prompts.json` was updated for `ep01_scene03_shot03`: FALSIFIED (Still `thuy_kieu_maiden`).
  5. Actor switch transition classification when previous shot tail frame exists: VULNERABILITY CONFIRMED. `classify_shot_take` fails to check previous shot's asset ref and passes empty `shot_data` to `get_character_anchor(prev_shot_id)`, classifying actor switches (e.g. Vân->Kiều, Ông->Quan, Kim->Kiều) as `CONTINUOUS_TAKE` and chaining previous actor's tail frame into the next actor's shot.
- **Vulnerabilities found**:
  - Latent tail frame leakage on actor switches during continuous batch rendering (`ep01_scene03_shot05->06`, `ep01_scene02_shot10->11`, `ep01_scene08_shot07->08`).
  - False claim in worker handoff regarding `02_AI_Prompts/gemini_banana_prompts.json`.
- **Untested angles**: Full multi-GPU live cloud render on Meta Muse (prohibited by instructions/quota).

## Loaded Skills
- None dispatched directly.

## Key Decisions Made
- Issue verdict: **REQUEST_CHANGES** due to empirical proof that `classify_shot_take` allows cross-character tail frame chaining on 3 critical actor-switch junctions when tail frames exist on disk.

## Artifact Index
- `BRIEFING.md` — persistent memory index
- `DISPATCH.md` — incoming task instruction record
- `progress.md` — liveness heartbeat
- `handoff.md` — final 5-component empirical challenge verdict