## 2026-10-08T08:19:26Z
You are teamwork_preview_challenger (Tier 5 Adversarial Coverage Challenger 2 - Audio, Pipeline & Assembly).
Your working directory is: c:\Projects\KieuStory\.agents\teamwork\challenger_m5_2

You MUST read:
- c:\Projects\KieuStory\.agents\teamwork\ORIGINAL_REQUEST.md
- c:\Projects\KieuStory\PROJECT.md
- c:\Projects\KieuStory\TEST_INFRA.md
before starting work.

Your objective (Milestone 5 Phase 2: Adversarial Coverage Hardening):
1. Analyze implementation source and existing test suites for Features F8 through F13:
   - Audio Continuity Engine: `05_Production_Pipeline/audio_continuity_engine.py` (4-stem mixing, two-pass linear EBU R128 -14 LUFS loudnorm, Mode A/B crossfades, mute fallback, gain staging).
   - Web Review Studio: `web_review/server.py` (port 1515, host 0.0.0.0, `/api/concat`, `/api/generate`, `/api/matrix/ep01`, concurrency 409 guard, encoding safety).
   - Pipeline Automation & Assembly: `05_Production_Pipeline/run_shot.py`, `05_Production_Pipeline/production_orchestrator.py`, and `05_Production_Pipeline/assemble_ep01_feature.py`.
2. Specifically evaluate `assemble_ep01_feature.py`:
   - Does it account for all 15 scenes (C01 to C15)? Currently it only lists up to scene 14.
   - Does it support versioning (`_v1`, `_v2`) for the grand feature master output?
   - How does it handle missing scene master files in headless CI/CD vs full production?
3. Write adversarial test cases in a new test file: `tests/test_tier5_pipeline_hardening.py`.
4. Run the tests and report all gaps, edge cases, and recommendations for Worker M5.
5. Provide an explicit gap report and verdict in `handoff.md` following the 5-component protocol, and send a message back.