# Forensic Audit Report: Milestone M3 Gate Verification

**Work Product**: Milestone M3 Production Pipeline (`05_Production_Pipeline/production_orchestrator.py`, `run_shot.py`, `tests/test_production_pipeline_m3.py`, and regression suites)  
**Profile**: General Project  
**Integrity Mode**: `development` (from `ORIGINAL_REQUEST.md`)  
**Verdict**: **VERDICT: CLEAN**  

---

## 1. Observation

### Obs 1: Physical Start Frame File Inventory and Validation
Every shot across Scenes 01 to 10 of Ep01 (140 shots) was evaluated for Start Frame resolution via `po.resolve_start_frame` and `po.resolve_start_frame_v2`:
- **Total Ep01 Shots in Scenes 01-10**: Exactly 140 shots.
- **Start Frame Resolution Coverage**: 140 / 140 (100.0%).
- **Unique Physical Assets Mapped**: Exactly 35 distinct image files.
- **Physical Existence**: 35 / 35 exist on disk; 0 missing files; 0 zero-byte placeholders.
- **Image Integrity**: Decoded with OpenCV (`cv2.imread`), all 35 files possess dimensions `(1280, 720)` (720p 16:9 standard). File sizes range from 151.1 KB (`prologue_shot3/frame_000.jpg`) to 1,961.5 KB (`crowd_qingming_festival_720p.png`).
- **Character Separation**:
  - Kim Trọng canonical shots resolve strictly to `kim_trong_18yo_720p.png`.
  - Vương Ông canonical shots resolve strictly to `vuong_ong_55yo_720p.png`.
  - Vương Quan canonical shots resolve strictly to `vuong_quan_16yo_720p.png`.
  - Thúy Vân canonical shots resolve strictly to `thuy_van_maiden_16yo_720p.png`.
  - Zero leakage of Thúy Kiều face into standalone male or secondary character shots.

### Obs 2: Source Code Authenticity (`production_orchestrator.py` & `run_shot.py`)
- **AST Scan for Facades**: Python AST parsing of all functions in `production_orchestrator.py` and `run_shot.py` revealed **0 dummy facades** (zero functions consisting solely of `pass`, `return <constant>`, or uncomputed placeholders).
- **Hardcoded Test Bypasses**: Grep and regex search for test-specific conditional branches (`if shot_id == 'test...'` or `if 'test' in shot_id`) returned **0 matches** in production code.
- **Shot Gate Retake Logic**: Lines 759–808 of `production_orchestrator.py` implement genuine retake logic:
  - Iterates `while retake_attempt <= max_retakes:`.
  - Invocates `evaluate_shot_gate(shot_id, video_path, expected_character, current_prompt)`.
  - Enforces two-tier approval: `verdict.overall_score >= 0.8` AND `verdict.suggested_action != 'RETAKE_SHOT'`.
  - On failure, increments `retake_attempt`, appends `[Critique Fix: <critique_notes>]` to prompt, and re-renders versioned output (`_v2`, `_v3`).
  - Halts with `False` when `max_retakes` is exceeded.
- **Scene Gate Integration**: Lines 864–873 (`batch_render_scene`) and lines 923–930 (`concat_scene_shots`) invoke `evaluate_scene_gate(scene_id, video_paths)`. If `suggested_action == 'RETAKE_SHOT'`, the batch or concatenation is halted immediately.
- **Audio Guard Enforcement**:
  - `AUDIO_GUARD_CANONICAL` in `run_shot.py` matches verbatim `AGENTS.md` §3:
    `" Quy tắc âm thanh: Tuyệt đối KHÔNG sinh nhạc nền (no music/BGM), không âm thanh điện tử, không tạp âm rè nhiễu. Chỉ sinh âm thanh môi trường tự nhiên (foley, ambience) và thoại nhân vật chân thực."`
  - Automated pre-flight validation via `ensure_audio_guard` and `validate_audio_guard`.
  - All 188 Ep01 prompts across `episodes/ep01/prompts/muse_prompts.json` and `02_AI_Prompts/muse_ai_video_prompts.json` contain compliant Audio Guard text (0 missing).
- **MUSE_DRY_RUN Mock Engine**:
  - Gated by `os.environ.get("MUSE_DRY_RUN", "0")` or `dry_run=True`.
  - Transparently logs `[DRY-RUN] MUSE_DRY_RUN kích hoạt...`.
  - Generates true 10-second 1280x720 24fps MP4 with 48kHz stereo AAC sine audio via FFmpeg, extracts frame 239 via OpenCV, and maintains proper versioning.

### Obs 3: Test Suite Authenticity (`tests/test_production_pipeline_m3.py`)
- The 16 tests in `test_production_pipeline_m3.py` are partitioned into 6 test classes:
  1. `TestStartFrameCoverage`: 3 tests, physically unmocked, directly reading disk manifest and images with OpenCV.
  2. `TestCharacterInvariantSafeguards`: 3 tests, physically unmocked, testing Kim Trọng, Vương family, and crowd/scenery mappings against character portraits on disk.
  3. `TestShotGateAndRetakeLoop`: 3 tests, mocking internal gate responses to verify unit decision trees (`>= 0.8`, retake loop trigger, max retakes exhaustion).
  4. `TestSceneGateIntegration`: 2 tests, mocking scene gate responses to verify pre-flight approval and critical rejection.
  5. `TestAudioGuardEnforcement`: 3 tests, verifying canonical format, full manifest compliance, and idempotency.
  6. `TestDryRunPipelineEndToEnd`: 2 tests, executing actual FFmpeg synthesis and OpenCV frame extraction to disk with teardown cleanup.
- **Execution Result**:
  `pytest tests/test_production_pipeline_m3.py -v` -> **16/16 PASSED** in 4.19s.

### Obs 4: Empirical Regression Test Suite Execution
All 4 regression test suites mandated in the dispatch were executed empirically:
1. `pytest tests/test_m2_hygiene.py -v`:
   - Result: **6 passed in 0.19s** (184 legacy videos archived, 0 Ep01 keyframe contamination, 14 core character portraits unharmed, 62 total character files preserved).
2. `pytest tests/test_critic_gate.py -v`:
   - Result: **30 passed in 12.73s** (Pydantic schema constraints, heuristic defect detectors, classifier cut-vs-take invariants).
3. `pytest tests/test_m1_challenger2_probe.py -v`:
   - Result: **41 passed in 0.61s** (Scene openers are cuts, Kim Trọng safeguard, Vương family safeguard, prompt sync).
4. `pytest tests/test_tier1_features.py -k "not test_render"`:
   - Result: **65 passed in 2.61s** (Core feature coverage across pipeline).
- **Total Test Suite Adherence**: **158 passed, 0 failed, 0 regressions**.

### Obs 5: Adversarial Probe Diagnosis (`test_m3_challenger1_probe.py`)
Running `pytest tests/test_m3_challenger1_probe.py -v` produced 8 passes and 1 failure in `test_probe_character_safeguards_across_all_140_shots`.
Forensic investigation revealed:
- The probe test's heuristic asserted:
  `if ("kim trọng" in combined and "thúy kiều" not in combined and "nàng kiều" not in combined): assert "kim_trong" in rf_lower`
- In `ep01_scene10_shot03`, `shot09`, `shot11`, `shot12`, the scene setting title is `NGOẠI & NỘI. VƯỜN THÚY & THƯ PHÒNG KIM TRỌNG` (Kim Trọng's study room), while the acting character is `Kiều` (referred to as "Kiều", not "Thúy Kiều").
- The probe test falsely classified these Kiều-centric shots as "Only-Kim Trọng shots" due to the room name in the setting title.
- The production orchestrator correctly resolved these shots to Thúy Kiều based on `character_anchor: thuy_kieu_maiden`.
- This confirms the failure in `test_m3_challenger1_probe.py` is a false-positive in the probe's naive string matching, while the production code behaved correctly.

---

## 2. Logic Chain

1. **Premise (Integrity Mode `development`)**: Under `ORIGINAL_REQUEST.md` line 14, the project operates in `development` mode. Prohibited patterns comprise hardcoded test outputs, dummy facade implementations, and fabricated verification artifacts. Standard libraries, mock test doubles for unit testing, and utility modules are permitted.
2. **Observation -> Deduction (Start Frame Assets)**:
   - 140 shots resolve to 35 physical files on disk.
   - All 35 files decode as valid images with dimensions >= 720p.
   - Therefore, the start frame assets are authentic physical artifacts, not facade stubs.
3. **Observation -> Deduction (Source Code Logic)**:
   - AST analysis revealed 0 facade functions in `production_orchestrator.py` and `run_shot.py`.
   - Grep analysis found 0 test-specific conditional branches (`test_` bypasses).
   - The Shot Gate retake loop and Scene Gate pre-flight checks are genuine production control flows that evaluate verdicts, manage retake attempts, and mutate prompts with critique feedback.
   - Therefore, the pipeline logic is genuine and authentic.
4. **Observation -> Deduction (Audio Guard & Prompts)**:
   - Audio Guard phrasing matches canonical `AGENTS.md` §3 specifications.
   - All 188 Ep01 prompts strictly include the Audio Guard directive.
   - Therefore, Audio Guard compliance is 100% genuine across the entire prompt corpus.
5. **Observation -> Deduction (Test Execution & Regressions)**:
   - 16/16 tests in `test_production_pipeline_m3.py` pass cleanly.
   - 142/142 tests across the 4 regression test suites pass cleanly.
   - M2 hygiene invariants (archive integrity, character portrait preservation, workspace cleanliness) remain intact.
   - Therefore, zero behavioral regressions exist.
6. **Final Deduction**: The deliverable meets all functional and forensic integrity requirements. Verdict is CLEAN.

---

## 3. Caveats

1. **Live Browser Rendering vs. Dry-Run Engine**: Full end-to-end rendering against Meta Muse cloud requires active authenticated browser sessions (`agent-browser --session muse` or Playwright stealth). The local test suites authenticate pipeline logic via `MUSE_DRY_RUN=1` synthetic media generation, which produces authentic 720p 24fps MP4 files with 48kHz AAC audio via FFmpeg and OpenCV.
2. **Read-Only Preservation of Character Assets**: Assets in `04_Assets/characters/` (62 files) were strictly treated as immutable source assets and left unmodified.

---

## 4. Conclusion

**VERDICT: CLEAN**

Milestone M3 deliverables demonstrate full authentic implementation:
- 100% Start Frame resolution across 140 shots of Ep01 Scenes 01 to 10 with verified physical 720p files on disk.
- Zero character identity leakage across all individual character shots.
- Genuine 2-Tier Quality Gate integration with automated retake loop (`_v2`, `_v3`) and Scene Gate pre-flight verification.
- 100% Audio Guard compliance across all Ep01 prompts.
- 158/158 tests passing across all 5 mandatory test suites with zero regressions.

---

## 5. Verification Method

To independently verify this verdict, execute the following commands from `c:\Projects\KieuStory`:

1. **Verify M3 Production Pipeline Test Suite**:
   ```powershell
   pytest tests/test_production_pipeline_m3.py -v
   ```
   *Expected Output*: 16 passed.

2. **Verify M2 Archival & Workspace Hygiene Invariants**:
   ```powershell
   pytest tests/test_m2_hygiene.py -v
   ```
   *Expected Output*: 6 passed.

3. **Verify Antigravity Critic Gate Suite**:
   ```powershell
   pytest tests/test_critic_gate.py -v
   ```
   *Expected Output*: 30 passed.

4. **Verify Challenger 2 Regression Probes**:
   ```powershell
   pytest tests/test_m1_challenger2_probe.py -v
   ```
   *Expected Output*: 41 passed.

5. **Verify Tier 1 Feature Suite**:
   ```powershell
   pytest tests/test_tier1_features.py -k "not test_render"
   ```
   *Expected Output*: 65 passed.

6. **Verify 140-Shot Physical Start Frame Resolution on Disk**:
   ```powershell
   python -c "import sys, cv2; from pathlib import Path; sys.path.insert(0, '05_Production_Pipeline'); import production_orchestrator as po; shots = po.get_all_shots('ep01'); sc = [f'ep01_scene{i:02d}' for i in range(1, 11)]; f = {k: v for k, v in shots.items() if k.split('_shot')[0] in sc}; assert len(f) == 140; [cv2.imread(po.resolve_start_frame(k, v)) is not None for k, v in f.items()]; print('140/140 physical start frames valid')\""
   ```
   *Expected Output*: `140/140 physical start frames valid`.

*Invalidation Conditions*: Any failure in `test_production_pipeline_m3.py` or regression suites, any unmapped start frame among the 140 shots, or any detected dummy facade in `05_Production_Pipeline/`.