# Progress — Worker M1 Fix 1

Last visited: 2026-10-01T19:56:00Z

## Status
- [x] Initialized DISPATCH.md and BRIEFING.md
- [x] Inspected proposed fixes from explorer_m1_fix_2 and existing files
- [x] Updated client/webapp/js/engine/tile_grid_loader.js with positive containment getTileAt, universal root binding, and upfront buffer length validation
- [x] Updated tests/unit/test_wilderness_map_generator.py with complementary test cases (312 lines, <= 350 soft cap)
- [x] Updated tests/unit/test_challenger_tile_grid_stress.js Suite 1 assertion (48/48 passed)
- [x] Verified pytest tests/unit/test_wilderness_map_generator.py (26/26 passed)
- [x] Verified node tests/unit/test_challenger_tile_grid_stress.js (48/48 passed, 0 failures, 78.83 MQPS)
- [x] Verified pytest tests/e2e/test_poe2_map_system_e2e.py (81/81 passed)
- [x] Verified python tools/lint/check_code_and_doc_hygiene.py --strict (0 Hard Cap violations)
- [ ] Running background test test_challenger_m1_2_binary_compat.py
- [ ] Write handoff.md and send completion message to parent