# BRIEFING — 2026-09-30T23:40:00Z

## Mission
Design the unit test suite expansion for Milestone 1: Server Zone Gating & Safe Haven Purity for the Worker agent.

## 🔒 My Identity
- Archetype: explorer
- Roles: M1 Unit Test Suite Explorer
- Working directory: c:\Projects\FreeExile\.agents\teamwork\explorer_m1_3
- Original parent: bc45a740-aa86-45b5-8706-381960281bc6
- Milestone: Milestone 1: Server Zone Gating & Safe Haven Purity

## 🔒 Key Constraints
- Read-only investigation — do NOT implement or modify codebase source files
- Only write metadata, reports, and briefings in working directory: c:\Projects\FreeExile\.agents\teamwork\explorer_m1_3
- Provide specific, non-flaky test case recommendations and implementations for Worker
- Use send_message to report to caller

## Current Parent
- Conversation ID: bc45a740-aa86-45b5-8706-381960281bc6
- Updated: 2026-09-30T23:40:00Z

## Investigation State
- **Explored paths**:
  - `ORIGINAL_REQUEST.md`, `PROJECT.md`, `explorer_survey_2/handoff.md`
  - `tests/unit/test_zone_monster_spawning_rules.py`
  - `server/world/zone_catalog.py`, `server/world/zone_engine.py`, `server/world/zone_types.py`, `server/world/spatial_grid.py`
  - `tests/unit/test_map_instance_system.py`, `test_hideout_engine.py`, `test_combat_engine.py`
- **Key findings**:
  - `zone_player_hideout` is missing from `_register_zones` in `zone_catalog.py`, causing `KeyError` on `get_zone` and `spawn_player`.
  - Duplicate `get_zone_definition` in `zone_engine.py:89-94` requires cleanup.
  - `ZoneDefinition` uses `name`, not `display_name`, and has no `max_level` parameter.
  - Code hygiene limits require test files $\le 350$ lines soft cap / $\le 500$ lines hard cap and functions $\le 50$ lines.
  - Formulated 10 comprehensive, non-flaky test cases covering all M1 requirements.
- **Unexplored areas**: None within M1 test design scope.

## Key Decisions Made
- Designed 10 specific test cases for `test_zone_monster_spawning_rules.py` verifying zone type, hostile spawn rejection, dummy acceptance, player spawn coordinates, spatial grid isolation, and method deduplication.
- Simulated and validated all test assertions in Python interactive environment.
- Documented full implementation guide for Worker in `handoff.md`.

## Artifact Index
- c:\Projects\FreeExile\.agents\teamwork\explorer_m1_3\DISPATCH.md — Dispatch record
- c:\Projects\FreeExile\.agents\teamwork\explorer_m1_3\BRIEFING.md — Working memory & state
- c:\Projects\FreeExile\.agents\teamwork\explorer_m1_3\progress.md — Liveness heartbeat
- c:\Projects\FreeExile\.agents\teamwork\explorer_m1_3\handoff.md — Final handoff report