# Handoff Report — Explorer M3.1

**Milestone**: M3 — Ep01 10-Scene Production Pipeline Readiness & Start Frame Audit  
**Author**: Explorer 1 (`explorer_m3_1`)  
**Date**: 2026-10-09  
**Recipient**: Parent Orchestrator (`97faf5e5-a830-491c-b78c-2af12175badf`)  
**Primary Deliverable**: `c:\Projects\KieuStory\.agents\teamwork\explorer_m3_1\production_pipeline_readiness.md`

---

## 1. Observation

1. **Shot Inventory & Take Classification (Ep01 Scenes 01 to 10)**:
   - Tool execution `audit_ep01_start_frames.py` and `production_orchestrator.get_all_shots("ep01")` confirmed exactly **140 shots** across Scenes 01 to 10:
     * `ep01_scene01`: 21 shots
     * `ep01_scene02`: 15 shots
     * `ep01_scene03`: 15 shots
     * `ep01_scene04`: 12 shots
     * `ep01_scene05`: 27 shots
     * `ep01_scene06`: 14 shots
     * `ep01_scene07`: 8 shots
     * `ep01_scene08`: 8 shots
     * `ep01_scene09`: 6 shots
     * `ep01_scene10`: 14 shots
   - Evaluating `classify_shot_take()` across all 140 shots produced:
     * **105 Cinematic Cuts** (75.0%)
     * **35 Continuous Takes** (25.0%)

2. **Start Frame Resolution Status**:
   - Out of 105 Cinematic Cuts:
     * **80 shots** resolve to valid, physically existing image files on disk (`04_Assets/characters/01_Main_Protagonists/`: 56 shots; `04_Assets/characters/02_Vuong_Family_And_Fate/`: 23 shots; `04_Assets/keyframes/prologue_shot1/`: 1 shot).
     * **25 shots** resolve to `None`:
       - `ep01_scene01`: 19 shots (shots 02 to 21, except shot 08)
       - `ep01_scene04`: 1 shot (`ep01_scene04_shot01`)
       - `ep01_scene05`: 2 shots (`ep01_scene05_shot07`, `ep01_scene05_shot10`)
       - `ep01_scene06`: 2 shots (`ep01_scene06_shot01`, `ep01_scene06_shot02`)
       - `ep01_scene08`: 1 shot (`ep01_scene08_shot01`)
   - Out of 35 Continuous Takes:
     * **30 shots** have safe fallback character portraits in Character Bible.
     * **5 shots** (`ep01_scene01_shot08`, `ep01_scene04_shot02, 03, 04, 12`) return `None` when evaluated cold, but naturally resolve to `clean_frame_239.jpg` once the preceding shot in the scene is rendered.

3. **Critic Quality Gate Pipeline Integration**:
   - In `05_Production_Pipeline/production_orchestrator.py` lines 46-55:
     ```python
     try:
         from antigravity_critic_gate import evaluate_shot_gate, evaluate_scene_gate, VideoCriticVerdict
     except ImportError:
         ...
     ```
     Imports exist.
   - However, in `render_single_shot()` (lines 624-678), `batch_render_scene()` (lines 680-735), and `concat_scene_shots()` (lines 753-839):
     * `evaluate_shot_gate` is **NEVER CALLED** after a shot is rendered.
     * There is **ZERO automated retake loop** if a shot has visual defects or score < 0.8.
     * `evaluate_scene_gate` is **NEVER CALLED** after all shots in a scene are rendered or during batch-scene / concat-scene.

4. **Audio Guard Compliance**:
   - In `episodes/ep01/prompts/muse_prompts.json`: 192/192 prompts (100%) contain a No-BGM guard suffix. 188/192 contain the exact canonical string:
     `"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."`
   - In `run_shot.py` lines 137-140, the fallback suffix string is:
     `" Âm thanh: Chỉ sinh âm thanh môi trường tự nhiên (foley, ambience) và thoại nhân vật chân thực. Tuyệt đối KHÔNG sinh nhạc nền (no music/BGM), không âm thanh điện tử, không tạp âm rè nhiễu."`
     (Notice omission of `"Quy tắc âm thanh:"` prefix).
   - In `production_orchestrator.py` and `multi_worker_orchestrator.py`, prompts are forwarded without pre-flight Audio Guard validation.

5. **Runner Execution & Testing Environment**:
   - `invisible_playwright` is installed and operational.
   - `agent-browser` and `ffmpeg` are present on system PATH.
   - Currently, neither `production_orchestrator.py` nor `run_shot.py` supports a `--dry-run` or mock mode. Automated test suites calling `render_single_shot` risk hanging on browser automation / external network dependencies.

---

## 2. Logic Chain

1. From Observation 1 and 2:
   - 80 of 105 Cinematic Cuts already resolve correctly without any Thúy Kiều contamination (safeguards from M1 working as expected).
   - The 25 missing Cinematic Cuts failed because:
     * For `ep01_scene04_shot01`: The image exists on disk at `04_Assets/keyframes/crowd_qingming_festival_720p.png`, but `muse_prompts.json` points to the purged path `04_Assets/keyframes/ep01_scene04_shot01/start_frame_720p.png`. Mapping the alias resolves this immediately.
     * For `ep01_scene01_shot01` to `shot04`: Pristine keyframes already exist in `04_Assets/keyframes/prologue_shot1` to `prologue_shot4`. Mapping `character_asset_ref` resolves shots 02-04 immediately.
     * For `ep01_scene01_shot05` to `shot21`: Complete 720p clean frames can be extracted from the 21 legacy video files safely preserved in `04_Assets/archive/ep01_legacy_v1/`, populated into `04_Assets/keyframes/prologue_shot{N}/`, and registered in `muse_prompts.json`.
     * For `ep01_scene05_shot07, 10`, `ep01_scene06_shot01, 02`, and `ep01_scene08_shot01`: Complete Imagen 3 prompts exist in `02_AI_Prompts/gemini_banana_prompts.json`. Connecting them to background assets or generating/extracting 720p start frames completes 100% resolution for all 140 shots.
2. From Observation 3:
   - Because `evaluate_shot_gate` and `evaluate_scene_gate` are not invoked in `production_orchestrator.py`, any defects generated by Muse.ai would currently bypass quality control and enter final scene masters.
   - Injecting `evaluate_shot_gate` into `render_single_shot` with a while loop (up to `max_retakes=2`, incrementing version `_v2`, `_v3`) guarantees that no shot with score < 0.8 is accepted.
   - Injecting `evaluate_scene_gate` into `batch_render_scene` and `concat_scene_shots` ensures junction smoothness, color continuity, and pacing are validated before FFmpeg concat and audio mastering.
3. From Observation 4:
   - Aligning `run_shot.py`'s fallback string with AGENTS.md §3 ensures 100% syntactic uniformity across all prompts and code dispatchers.
4. From Observation 5:
   - Introducing `MUSE_DRY_RUN=1` (generating 10s test video with lavfi and 48kHz AAC sine audio) allows the entire pipeline lifecycle (Shot Gate, retake loop, Scene Gate, AudioConinuityEngine concat, EBU R128 loudness check) to be verified in automated pytest suites in under 15 seconds without browser hangs.

---

## 3. Caveats

1. **Physical Browser Automation Dependency**:
   - In production (non-dry-run) mode, rendering real shots requires valid session logins in `agent-browser` (`muse`) or active profile in `invisible_playwright` (`phu2234`). This investigation did not trigger external cloud renders to preserve rate limits and avoid side effects.
2. **Scenery Start Frame Creation**:
   - For the 5 scenery shots in Scenes 05, 06, and 08 (`ep01_scene05_shot07, 10`, `ep01_scene06_shot01, 02`, `ep01_scene08_shot01`), pristine 720p start frames must either be generated via Imagen 3 Banana or extracted from clean legacy scene renders before cold-starting sequential batch render.

---

## 4. Conclusion

1. **Readiness Assessment**: Milestone M3 is in an excellent position to succeed. The mathematical inventory is exactly 140 shots across Scenes 01 to 10 (105 Cuts, 35 Takes).
2. **Gaps are Narrow and Solvable**:
   - 25 missing Start Frames can be 100% resolved via asset mapping and keyframe ingestion.
   - Critic Gate integration requires straightforward additions to `render_single_shot` (Shot Gate + retake loop) and `batch_render_scene` / `concat_scene_shots` (Scene Gate).
   - Audio Guard formatting requires a 2-line synchronization in `run_shot.py`.
   - Test execution requires a dry-run mock mode to achieve deterministic 100% pass rates in automated verification.
3. **Actionable Implementation Plan Prepared**: All 5 tasks, exact code recipes, and comprehensive test suite designs are documented in `production_pipeline_readiness.md`.

---

## 5. Verification Method

1. **Verify Start Frame Audit**:
   ```powershell
   python .agents/teamwork/explorer_m3_1/audit_ep01_start_frames.py
   ```
   *Expected*: Outputs the 140-shot scene breakdown table matching Section 1 of this report.

2. **Verify Critic Gate Functions Import & Schema**:
   ```powershell
   python -c "import sys; sys.path.insert(0, '05_Production_Pipeline'); from antigravity_critic_gate import evaluate_shot_gate, evaluate_scene_gate, VideoCriticVerdict; print('Import OK')"
   ```
   *Expected*: Prints `Import OK` without errors.

3. **Verify Audio Guard Compliance**:
   ```powershell
   python .agents/teamwork/explorer_m3_1/audit_audio_guard.py
   ```
   *Expected*: Reports 192/192 prompts containing No-BGM guard.

4. **Verify Milestone M1 Test Baseline (Zero Regressions)**:
   ```powershell
   pytest tests/test_critic_gate.py
   ```
   *Expected*: 30 passed in ~12 seconds.