# Progress Heartbeat

**Last visited**: 2026-10-08T15:59:35Z  
**Status**: COMPLETED. All empirical tests passed with 100% success rate. Verdict: APPROVE.

### Completed Steps
- [x] Initialized workspace and recorded dispatch message.
- [x] Created BRIEFING.md.
- [x] Reviewed PROJECT.md, ORIGINAL_REQUEST.md, and worker_m5_1 handoff.
- [x] Empirically executed `python 05_Production_Pipeline/assemble_ep01_feature.py --check` (exit code 0, 17 parts inspected: 16 ready, 1 missing).
- [x] Empirically executed `python 05_Production_Pipeline/assemble_ep01_feature.py --dry-run` (exit code 0, mock pipeline printed).
- [x] Empirically tested programmatic import & invocation of `assemble_grand_feature()` (check=True -> True, dry_run=True -> True, missing scenes -> False without exit/exceptions).
- [x] Empirically tested character asset resolution in `resolve_start_frame()` across 10 alias permutations and all 188 EP01 shots (100% resolved to existing files on disk, zero failures).
- [x] Stress tested `resolve_scene_part()` dynamic versioning resolution (properly prioritizes highest version tag, e.g. v10 > v2 > v1 > v0).
- [x] Stress tested live 17-parts assembly with synthetic test clips (valid H.264 + 48kHz AAC master generated).
- [x] Full test suite executed (`pytest tests/ -q`): 247 passed in 42.57s.
- [x] Generated handoff.md with 5-component protocol and verdict APPROVE.
- [x] Sent completion message to parent coordinator.