# BRIEFING — 2026-10-01T03:13:30Z

## Mission
Design unit test cases for tests/unit/test_level_progression_service.py covering all 4 remediation fixes and verify E2E & challenge suites pass 100%.

## 🔒 My Identity
- Archetype: teamwork_preview_explorer
- Roles: Explorer, Synthesizer
- Working directory: c:\Projects\FreeExile\.agents\teamwork\explorer_m2_progression_3_gen2
- Original parent: 6f4a2aa2-4315-4660-8cb7-8352a7220c95
- Milestone: Milestone M2 Iteration 2

## 🔒 Key Constraints
- Read-only investigation — do NOT implement / do NOT modify source code
- Files for content delivery, Messages for coordination
- Strict adherence to 5-Component Handoff Report protocol
- Report path: c:\Projects\FreeExile\.agents\teamwork\explorer_m2_progression_3_gen2\report.md
- Handoff path: c:\Projects\FreeExile\.agents\teamwork\explorer_m2_progression_3_gen2\handoff.md

## Current Parent
- Conversation ID: 6f4a2aa2-4315-4660-8cb7-8352a7220c95
- Updated: 2026-10-01T03:08:32Z

## Investigation State
- **Explored paths**:
  - `server/world/level_progression_service.py` (lines 107-124, 150-260, 295-337)
  - `server/world/combat_engine.py` (lines 170-192)
  - `server/world/level_progression_types.py` (complete)
  - `tests/unit/test_level_progression_service.py` (300 lines)
  - `tests/e2e/test_level_progression_e2e.py` (404 lines)
  - `.agents/teamwork/challenger_m2_progression_2/challenge_combat_progression.py` (589 lines)
  - `.agents/teamwork/reviewer_m2_progression_1/handoff.md` (113 lines)
- **Key findings**:
  - Verified Level 100 cumulative EXP overflow (+999,999 EXP past benchmark).
  - Verified Level 100 death handling drops `deaths_count` and `_death_listeners` dispatch.
  - Verified corpse overkill evaluates `is_fatal=True` on dead actors, causing EXP duplication and death penalty multi-drain.
  - Verified negative base EXP injection deduction.
  - Formulated 9 unit tests across 4 suites and proved in-memory 100% pass of unit, E2E (47 pass, 3 xfail for M3), and challenge suites (VERDICT: APPROVE, 0 defects).
- **Unexplored areas**:
  - None within M2 scope.

## Key Decisions Made
- Fully authored report.md with test case designs and ready-to-use implementation diffs.
- Completed 5-component handoff.md.

## Artifact Index
- DISPATCH.md — Recorded incoming orchestrator dispatch
- BRIEFING.md — Persistent context & identity tracker
- progress.md — Heartbeat and status
- report.md — Comprehensive test case design report
- handoff.md — 5-component handoff for orchestrator/implementer