# BRIEFING — 2026-10-09T05:07:00Z

## Mission
Empirical adversarial stress-testing of Critic Gate remediation for Milestone M1 Iteration 2.

## 🔒 My Identity
- Archetype: EMPIRICAL CHALLENGER
- Roles: critic, specialist
- Working directory: c:\Projects\KieuStory\.agents\teamwork\challenger_m1_iter2_1
- Original parent: 97faf5e5-a830-491c-b78c-2af12175badf
- Milestone: M1 Iteration 2 Gate Verification
- Instance: 1 of 1

## 🔒 Key Constraints
- Review-only — do NOT modify implementation code (report findings/bugs, do not fix them yourself)
- Verification must be EMPIRICAL: write and run test harnesses, never trust worker's claims or logs
- Do not place source, tests, or data in .agents/teamwork/ (source/test in tests/ or run via script in repo)
- Memory calls must respect project="KieuStory"
- Communicate via send_message to parent 97faf5e5-a830-491c-b78c-2af12175badf

## Current Parent
- Conversation ID: 97faf5e5-a830-491c-b78c-2af12175badf
- Updated: 2026-10-09T05:07:00Z

## Review Scope
- **Files to review**: c:\Projects\KieuStory\05_Production_Pipeline\antigravity_critic_gate.py, tests/test_critic_gate.py, tests/test_adversarial_critic_gate_m1.py, tests/test_challenger1_empirical_stress.py
- **Interface contracts**: PROJECT.md, ORIGINAL_REQUEST.md, worker_m1_remediation_2/handoff.md
- **Review criteria**: Correctness, stress resilience, non-existent/corrupted file handling, motion freeze penalty >= 0.35, character cross-contamination detection.

## Attack Surface
- **Hypotheses tested**:
  * `evaluate_scene_gate` handling of missing, 0-byte, truncated, and corrupted video files (alone and mixed with valid files).
  * `evaluate_shot_gate` frozen video detection and score capping (docking >= 0.35, score <= 0.65, RETAKE_SHOT).
  * `evaluate_shot_gate` character cross-contamination detection when Thúy Kiều appears in Vương Ông, Vương Quan, or Kim Trọng shots (both static portrait and animated micro-motion).
  * Schema boundary conditions (0.799 vs 0.800, action override on RETAKE_SHOT).
- **Vulnerabilities found**:
  * Zero security or logic vulnerabilities in offline heuristic evaluation.
  * Observed RuntimeWarning when `AntigravitySDKEngine` calls unawaited `Agent.chat` in asynchronous environments; safely swallowed by exception handler and successfully falls back to offline heuristic engine.
- **Untested angles**: Live Gemini API endpoints requiring live network credentials (tested with deterministic offline heuristic fallback).

## Loaded Skills
- None loaded

## Key Decisions Made
- Executed full test suite `tests/test_critic_gate.py` (30 passed).
- Executed full test suite `tests/test_adversarial_critic_gate_m1.py` (29 passed).
- Authored and executed dedicated independent adversarial stress harness `tests/test_challenger1_empirical_stress.py` (15 passed).
- Verified combined 74-test pass across all 3 critic gate suites.
- Verified 112 regression tests across `test_m1_challenger2_probe.py`, `test_m2_hygiene.py`, and `test_tier1_features.py`.
- Formulated empirical verdict: **APPROVE**.

## Artifact Index
- DISPATCH.md — Initial dispatch message
- BRIEFING.md — Persistent context & state
- progress.md — Heartbeat & execution log
- handoff.md — Final 5-component report
- tests/test_challenger1_empirical_stress.py — Challenger 1 independent empirical test harness