# Progress — Forensic Auditor M1 Fix 1

Last visited: 2026-10-01T20:00:45Z

## Status
Audit completed. All checks passed. Binary verdict: CLEAN. Writing handoff.md.

## Planned Steps
1. [x] Initialize BRIEFING.md, DISPATCH.md, and progress.md.
2. [x] Inspect `client/webapp/js/engine/tile_grid_loader.js`. Check line count, bounds checking, finite checks, facade check. (PASS)
3. [x] Inspect `tests/unit/test_wilderness_map_generator.py`. Check line count, genuine assertions, self-certifying tests check. (PASS)
4. [x] Inspect `server/world/wilderness_map_generator.py`, `server/world/map_binary_serializer.py`, `server/world/map_data_types.py` for line counts and implementation validity. (PASS)
5. [x] Execute behavioral test suite (`pytest tests/unit/test_wilderness_map_generator.py`, `node tests/unit/test_challenger_tile_grid_stress.js`, `pytest tests/unit/test_challenger_m1_2_binary_compat.py`). (PASS)
6. [x] Edge-case / stress-test analysis of `getTileAt` and map generation logic. (PASS)
7. [x] Compile findings, write handoff.md with verdict, and notify parent.