# Progress Log — challenger_m3_2

- Last visited: 2026-10-02T03:05:45Z
- Status: Completed all empirical stress tests, authoring handoff report.

## Completed Steps
- [x] Initialized DISPATCH.md and BRIEFING.md.
- [x] Read worker and test writer handoff reports and project specs.
- [x] Inspected `test_biome_texture_manager.js`, `biome_texture_manager.js`, and `tile_map_renderer.js`.
- [x] Ran unit test suite `node tests/unit/test_biome_texture_manager.js` (8/8 sections passed).
- [x] Authored `tests/unit/test_challenger_biome_texture_stress.js` (316 lines <= 350 lines).
- [x] Executed empirical stress tests:
  - 3,000 rapid biome switches: verified complete eviction, 0 memory leak, active RAM ~72 KB (< 500 KB limit).
  - Out-of-order async race conditions: verified safe discarding of stale loads.
  - Corrupt / missing assets: verified 600 biome/tile combinations with zero black/white screens and 0 unhandled errors.
  - Tainted canvas / security errors: verified caught and handled with graceful fallback.
- [x] Verified full regression suites (333 pytest passed, 4/4 LRU thrashing suites passed, 48/48 tile grid loader passed, 0 hygiene violations).
- [x] Identified and documented E2E test alias assertion discrepancy in `test_30_biomes_generation_e2e.py`.
- [x] Synthesizing findings into handoff.md and notifying orchestrator.