# BRIEFING — 2026-10-09T07:28:00Z

## Mission
Remediate latent face-leakage vulnerability in classify_shot_take, align character_anchor in prompt files, harden resolve_start_frame safeguards, tighten batch_render_scene gate, and add comprehensive transition tests.

## 🔒 My Identity
- Archetype: implementer, qa, specialist
- Roles: implementer, qa, specialist
- Working directory: c:\Projects\KieuStory\.agents\teamwork\worker_m3_remediation_3
- Original parent: 97faf5e5-a830-491c-b78c-2af12175badf
- Milestone: Milestone M3 Iteration 3 Remediation

## 🔒 Key Constraints
- DO NOT CHEAT. All implementations must be genuine.
- Exclusive write ownership:
  - c:\Projects\KieuStory\05_Production_Pipeline\production_orchestrator.py
  - c:\Projects\KieuStory\02_AI_Prompts\gemini_banana_prompts.json
  - c:\Projects\KieuStory\episodes\ep01\prompts\banana_prompts.json
  - c:\Projects\KieuStory\tests\test_m3_challenger1_probe.py
- READ-ONLY: 04_Assets/characters/ (DO NOT MODIFY OR DELETE)
- PRESERVE: 04_Assets/archive/ep01_legacy_v1/ (DO NOT MODIFY OR DELETE)
- Minimal change principle: do not perform unrelated refactoring.

## Current Parent
- Conversation ID: 97faf5e5-a830-491c-b78c-2af12175badf
- Updated: 2026-10-09T07:28:00Z

## Task Summary
- **What to build**: Hardened `classify_shot_take` with character asset ref comparison and metadata-aware anchor resolution; prompt synchronization for character anchors; defense-in-depth in `resolve_start_frame`; gate tightening in `batch_render_scene`; comprehensive regression & probe tests in `test_m3_challenger1_probe.py`.
- **Success criteria**: 0 mismatches across 140-shot transition matrix; simulated tail frame does not leak face; 100% tests pass across all suites.
- **Interface contracts**: PROJECT.md & AGENTS.md
- **Code layout**: PROJECT.md § Code Layout

## Change Tracker
- **Files modified**:
  - `02_AI_Prompts/gemini_banana_prompts.json`: Updated character_anchor and prompt for ep01_scene03_shot03, ep01_scene03_shot05, ep01_scene02_shot10, ep01_scene08_shot08 across both buckets.
  - `episodes/ep01/prompts/banana_prompts.json`: Applied identical updates across both buckets.
  - `05_Production_Pipeline/production_orchestrator.py`: Hardened `classify_shot_take`, added defense-in-depth check in `resolve_start_frame`, tightened `batch_render_scene` gate check.
  - `tests/test_m3_challenger1_probe.py`: Added `test_classify_shot_take_actor_switches_are_cinematic_cuts` and `test_simulated_tail_frame_actor_switch_prevents_face_leak`.
- **Build status**: PASS (100% tests pass across all suites)
- **Pending issues**: None

## Quality Status
- **Build/test result**: PASS (105/105 passed in main suite; 65/65 passed in tier1 features)
- **Lint status**: Clean
- **Tests added/modified**: 2 new empirical probe tests covering full 140-shot transition matrix and simulated disk tail frames

## Loaded Skills
- None

## Key Decisions Made
- Used hard gate character asset reference comparison in `classify_shot_take` to ensure any change of character group immediately forces CINEMATIC_CUT.
- Passed `prev_data` into `get_character_anchor(prev_shot_id, prev_data)` so heuristics evaluate previous shot title/prompt if anchor is missing.
- Added bilateral safeguard verification in Step 1 of `resolve_start_frame` before returning `prev_tail`.

## Artifact Index
- DISPATCH.md — Assignment instructions
- BRIEFING.md — Situational awareness
- progress.md — Liveness heartbeat
- handoff.md — Final handoff report