# BRIEFING — 2026-10-08T06:44:00Z

## Mission
Investigate production_orchestrator.py, audio_continuity_engine.py, audio SFX assets for Scene 04 ambience, and formulate recommendations/code edits for Worker on M3 orchestration.

## 🔒 My Identity
- Archetype: explorer
- Roles: M3 Orchestrator & Ambience Asset Specialist
- Working directory: c:\Projects\KieuStory\.agents\teamwork\explorer_m3_3
- Original parent: f9992164-c0e4-4f7d-ba4a-25a83a4436bf
- Milestone: M3

## 🔒 Key Constraints
- Read-only investigation — do NOT implement directly in project source code
- Inspect production_orchestrator.py concat/mastering logic vs audio_continuity_engine.py
- Inspect 04_Assets/audio_sfx/ for festival crowd ambience and environment bed tracks
- Formulate exact code edits and status updates for Worker

## Current Parent
- Conversation ID: f9992164-c0e4-4f7d-ba4a-25a83a4436bf
- Updated: not yet

## Investigation State
- **Explored paths**:
  - `05_Production_Pipeline/production_orchestrator.py`
  - `05_Production_Pipeline/audio_continuity_engine.py`
  - `04_Assets/audio_sfx/`
  - `04_Assets/audio/`
  - `04_Assets/videos/`
  - `FilmMaker/TAP_01_XUAN_SAC_THE_NGUYEN_VA_GIONG_BAO_DOAN_TRUONG.md` (Scene 04)
  - `00_Project_Bible/CINEMATIC_AUDIO_PIPELINE.md`
  - `PROJECT.md`
  - `tests/test_tier1_features.py`, `tests/test_tier2_boundaries.py`, `tests/test_tier3_interactions.py`
- **Key findings**:
  - `production_orchestrator.py` DOES NOT default to `stitch_with_audio_crossfade`. It uses naive linear FFmpeg concat filter (`concat=n=N:v=1:a=1`), causing audio click/pop and volume jumps.
  - `master_scene_audio` only accepts `--bgm` (Stem 1), completely lacks `--ambience` (Stem 2) bed track parameter and uses 1-pass loudnorm.
  - `04_Assets/audio_sfx/` is completely empty (0 files). There is NO continuous Stem 2 festival crowd ambience track for Scene 04.
  - Scene 04 has 12 shots specified in screenplay (120s), but currently only 2 video shots exist on disk with 24kHz mono audio and a 3.1 dB volume jump.
  - M2 is 100% complete with 155/155 test suites passing. `PROJECT.md` lines 48-49 must be updated: M2 -> DONE, M3 -> IN_PROGRESS.
- **Unexplored areas**: Full render of remaining 10 shots of Scene 04 (belongs to render workers).

## Key Decisions Made
- Formulated exact code refactoring for Worker in `production_orchestrator.py` (`concat_scene_shots` defaulting to `stitch_with_audio_crossfade`, versioning `_v*`, `--ambience` support).
- Formulated generation script design for `04_Assets/audio_sfx/ep01_scene04_festival_crowd_ambience_120s.wav`.
- Formulated exact line replacements for `PROJECT.md`.
- Completed `analysis.md` and `handoff.md`.

## Artifact Index
- DISPATCH.md — record of initial dispatch message
- BRIEFING.md — persistent situational awareness
- progress.md — liveness heartbeat
- analysis.md — comprehensive technical investigation report
- handoff.md — 5-component handoff report for Worker