# PROGRESS — Worker 1 (Milestone M4)

Last visited: 2026-10-09T08:10:00Z

## Status: Completed (Ready for Handoff)
- [x] Read DISPATCH.md, ORIGINAL_REQUEST.md, PROJECT.md, and blueprints
- [x] Initialize BRIEFING.md and progress.md
- [x] Task 1: Audio Asset & Scene Master Resolution Helpers in production_orchestrator.py (`resolve_audio_asset`, `resolve_scene_master`)
- [x] Task 2: Upgrade concat_scene_shots in production_orchestrator.py (`mode="boundary_smoothing"`, CLI `--mode`, missing audio fallback)
- [x] Task 3: Upgrade master_scene_audio in production_orchestrator.py (`resolve_audio_asset`, naming convention options, EBU R128 two-pass)
- [x] Task 4: Implement assemble_episode_master in production_orchestrator.py (10 canonical scenes, CLI arguments `--assemble-episode`, `--scenes`, `--check`, `--dry-run`, `--naming-style`)
- [x] Task 5: Upgrade 05_Production_Pipeline/assemble_ep01_feature.py (`resolve_scene_part` candidate ranking, `--scenes 10` campaign support, EBU R128 mastering)
- [x] Task 6: Implement tests/test_production_pipeline_m4.py (15 test methods across 5 core test groups)
- [x] Task 7: Run full test suites (M4, M3, adversarial, critic, tier5) and verify 100% pass rate with zero regression
- [x] Task 8: Write handoff.md and send completion message to parent