# Progress — worker_m5_fix_1

**Last visited**: 2026-10-01T22:52:00Z
**Status**: All remediation tasks implemented and 10/10 verification suites passed. Preparing final handoff.

## Steps
- [x] Initial setup: DISPATCH.md, BRIEFING.md, progress.md
- [x] Read ORIGINAL_REQUEST.md (R5), reviewer_m5_2/handoff.md, challenger_m5_1/handoff.md
- [x] Inspect client/webapp/js/engine/monster_pack_system.js
- [x] Inspect client/webapp/js/engine/ambush_trigger_system.js
- [x] Inspect client/webapp/js/engine/grid_pathfinder.js
- [x] Inspect tests/unit/test_encounter_zones.py
- [x] Implement Task 1 (monster_pack_system.js - idempotency and fallback)
- [x] Implement Task 2 (ambush_trigger_system.js - wall fallback clamp)
- [x] Implement Tasks 3 & 4 (grid_pathfinder.js - dynamic safety, exact arrival, 256-node reconstruct)
- [x] Implement Task 5 (tests/unit/test_encounter_zones.py - 4 regression tests)
- [x] Execute full verification suite:
  - [x] pytest tests/unit/test_encounter_zones.py -v (16/16 passed)
  - [x] node --expose-gc tools/perf/stress_test_grid_pathfinder.js (PASS, 0 false positives)
  - [x] pytest tests/unit/test_waypoint_safe_radius.py -v (17/17 passed)
  - [x] pytest tests/unit/test_monster_poise_and_leash.py -v (10/10 passed)
  - [x] pytest tests/unit/test_fog_and_minimap.py -v (14/14 passed)
  - [x] pytest tests/unit/test_tile_collision.py -v (11/11 passed)
  - [x] pytest tests/e2e/test_poe2_map_system_e2e.py -v (81/81 passed)
  - [x] node tools/perf/map_render_benchmark.js (0 stationary re-bakes, PASS)
  - [x] pytest tests/unit/ -q (1220/1220 passed)
  - [x] python tools/lint/check_code_and_doc_hygiene.py --strict (0 violations)
- [x] Write handoff.md and notify parent