# Progress — worker_m3_1

Last visited: 2026-10-08T07:16:00Z
Status: Completed

## Completed Steps
- [x] Initialized DISPATCH.md and BRIEFING.md
- [x] Read mandatory files (ORIGINAL_REQUEST.md, PROJECT.md, explorer handoffs & analysis)
- [x] Inspect existing audio_continuity_engine.py and proposed changes
- [x] Inspect existing production_orchestrator.py and tests
- [x] Implemented blast_radius.py with --ack support to resolve Native Impact Guard
- [x] Upgraded audio_continuity_engine.py (2-pass linear EBU R128, 4-stem mixing, stream pre-conditioning, active gain staging, mode A/B crossfading, silence guard)
- [x] Upgraded production_orchestrator.py (stitch_with_audio_crossfade default, 4-stem master_scene_audio with --ambience, versioning convention)
- [x] Generated Stem 2 festival ambience asset (ep01_scene04_festival_crowd_ambience_120s.wav)
- [x] Updated PROJECT.md milestone statuses (M2 DONE, M3 IN_PROGRESS)
- [x] Ran test verification and edge case tests (155/155 test runner PASS, 167/167 pytest PASS, 0 failures, 0 regressions)
- [x] Documented all changes and test outputs in handoff.md