# BRIEFING — 2026-10-09T03:36:50Z

## Mission
Adversarially challenge and empirically verify Worker M2 Hygiene 2 handoff for Milestone M2 Iteration 2 Gate Verification.

## 🔒 My Identity
- Archetype: challenger
- Roles: critic, specialist
- Working directory: c:\Projects\KieuStory\.agents\teamwork\challenger_m2_iter2_1
- Original parent: 97faf5e5-a830-491c-b78c-2af12175badf
- Milestone: Milestone M2 Iteration 2
- Instance: 1 of 1

## 🔒 Key Constraints
- Review-only — do NOT modify implementation code
- Empirical verification mandatory: run verification code directly, do not trust claims or logs
- If a bug cannot be reproduced empirically, it does not count

## Current Parent
- Conversation ID: 97faf5e5-a830-491c-b78c-2af12175badf
- Updated: 2026-10-09T03:27:58Z

## Review Scope
- **Files to review**: 
  - c:\Projects\KieuStory\.agents\teamwork\ORIGINAL_REQUEST.md
  - c:\Projects\KieuStory\.agents\teamwork\orchestrator_1\PROJECT.md
  - c:\Projects\KieuStory\.agents\teamwork\worker_m2_hygiene_2\handoff.md
  - tests/test_m2_hygiene.py
  - 04_Assets/characters/ (14 core character portraits)
  - 04_Assets/videos/
  - 04_Assets/keyframes/
- **Interface contracts**: c:\Projects\KieuStory\.agents\teamwork\orchestrator_1\PROJECT.md
- **Review criteria**:
  1. Empirical verification that PID 41044 / 65208 are dead and no rogue processes are running.
  2. Empirical verification that 0 Ep01 video files exist in 04_Assets/videos/ and 0 Ep01 keyframe directories exist in 04_Assets/keyframes/.
  3. Verification that PIL opens and decodes all 14 core character portraits without corruption.
  4. Run `python -m pytest tests/test_m2_hygiene.py -v`.
  5. Output empirical challenge verdict (APPROVE or REQUEST_CHANGES).

## Key Decisions Made
- Executed psutil process scans: confirmed PID 41044 and 65208 are dead.
- Executed PIL tests across all 14 core portraits and all 62 character files: all 100% valid and decodable.
- Executed keyframe scan: confirmed 0 Ep01 keyframe directories exist in `04_Assets/keyframes/`.
- Executed live pytest scan: Discovered `tests/test_m2_hygiene.py::test_videos_ep01_purged` FAILED due to `04_Assets/videos/ep01_scene01_shot01_10s_v1.mp4` generated at 10:32:41 by `scratch/download_shot01_blob.py`.
- Formulated empirical challenge verdict: REQUEST_CHANGES based on reproducible test failure.

## Artifact Index
- DISPATCH.md — dispatch message log
- BRIEFING.md — persistent working memory
- progress.md — liveness heartbeat
- handoff.md — empirical challenge report

## Attack Surface
- **Hypotheses tested**: 
  - Hypothesis 1: Background processes PID 41044 / 65208 are dead. (VERIFIED TRUE)
  - Hypothesis 2: 0 Ep01 keyframe directories exist in 04_Assets/keyframes/. (VERIFIED TRUE)
  - Hypothesis 3: 14 core character portraits and 62 total character assets are intact and decodable with PIL. (VERIFIED TRUE)
  - Hypothesis 4: Exactly 184 Ep01 legacy videos exist in archive with valid ftyp headers. (VERIFIED TRUE)
  - Hypothesis 5: 0 Ep01 video files exist in 04_Assets/videos/ and test_m2_hygiene.py passes. (VERIFIED FALSE - `04_Assets/videos/ep01_scene01_shot01_10s_v1.mp4` was created on disk at 10:32:41, causing test failure).
- **Vulnerabilities found**: 
  - Premature video file `04_Assets/videos/ep01_scene01_shot01_10s_v1.mp4` present on disk, violating M2 clean-slate invariant and failing `test_m2_hygiene.py::test_videos_ep01_purged`.
  - Root cause: Script `scratch/download_shot01_blob.py` actively writes to `04_Assets/videos/`.
- **Untested angles**: Full M3 render batch generation (reserved for Milestone M3).

## Loaded Skills
- None