## 2026-10-01T03:14:33Z

You are worker_m2_progression_2, a teamwork_preview_worker for Milestone M2 Iteration 2.
Your working directory is: c:\Projects\FreeExile\.agents\teamwork\worker_m2_progression_2
Your parent is: orchestrator_4 (conversation ID: 6f4a2aa2-4315-4660-8cb7-8352a7220c95)

Read the authoritative requirements in c:\Projects\FreeExile\.agents\teamwork\ORIGINAL_REQUEST.md under section ## 2026-10-01T00:40:44Z.
Read the project architecture in c:\Projects\FreeExile\.agents\teamwork\orchestrator_4\PROJECT.md.
Also read the detailed remediation reports and drop-in code prepared by the M2 gen 2 explorers:
- `c:\Projects\FreeExile\.agents\teamwork\explorer_m2_progression_1_gen2\handoff.md` and `proposed_level_progression_service.py`
- `c:\Projects\FreeExile\.agents\teamwork\explorer_m2_progression_2_gen2\handoff.md` and `report.md`
- `c:\Projects\FreeExile\.agents\teamwork\explorer_m2_progression_3_gen2\handoff.md` and `report.md`

MANDATORY INTEGRITY WARNING:
DO NOT CHEAT. All implementations must be genuine. DO NOT hardcode test results, create dummy/facade implementations, or circumvent the intended task. A teamwork_preview_auditor will independently verify your work. Integrity violations WILL be detected and your work WILL be rejected.

File Ownership:
You exclusively own and may edit the following files:
- `server/world/level_progression_service.py`
- `server/world/combat_engine.py`
- `tests/unit/test_level_progression_service.py`
- `tests/e2e/test_level_progression_e2e.py`

Task Instructions:
1. In `server/world/level_progression_service.py`:
   - Apply the drop-in fixes from `explorer_m2_progression_1_gen2`:
     * In `award_monster_exp`: clamp `cumulative_exp = min(self.get_canonical_benchmark(100).cumulative_exp, cumulative_exp)` when level >= 100, and ensure zero overflow past `24,285,477,315`.
     * In `apply_death_penalty`: remove early return for `player.level >= 100`. For level 100, `penalty_ratio = 0.0`, `exp_lost = 0`, but `deaths_count` increments by 1, state updates, and `_death_listeners` are notified.
     * In `award_monster_exp`: sanitize `base_exp = max(0, base_exp)` and `raw_exp = max(0, raw_exp)`.
   - Keep file length strictly <= 350 lines (soft cap), <= 500 lines (hard cap), functions <= 50 lines.

2. In `server/world/combat_engine.py`:
   - Apply the drop-in fixes from `explorer_m2_progression_2_gen2`:
     * In `calculate_damage`: check `was_alive = (defender.current_hp > 0.0)` before damage, and set `is_fatal = was_alive and (new_hp <= 0.0)`. Striking an already defeated actor (corpse) must evaluate `is_fatal = False` and NOT trigger fatal damage callbacks or duplicate EXP/penalty hooks.
     * In `CombatActor`: default `last_evasion_timestamp_ms: int = -1000` to prevent false evasion at timestamp 0..250ms.
   - Keep file length strictly <= 350 lines (soft cap), functions <= 50 lines.

3. In `tests/unit/test_level_progression_service.py`:
   - Add the 9 remediation unit test cases from `explorer_m2_progression_3_gen2`:
     * Level 100 cumulative EXP clamp with massive excess EXP.
     * Level 100 death handling (deaths_count increment, 0 EXP lost, listener notified).
     * Corpse overkill in combat engine (is_fatal is False on dead corpse, zero callback).
     * Negative base EXP sanitization.

4. Run all verification commands:
   - `python .agents/teamwork/challenger_m2_progression_1/challenge_level_progression.py` (must pass 100%)
   - `python .agents/teamwork/challenger_m2_progression_2/challenge_combat_progression.py` (must pass 100% with zero corpse overkill vulnerabilities)
   - `pytest tests/unit/test_level_progression_service.py -v`
   - `pytest tests/e2e/test_level_progression_e2e.py -v`
   - `python -m mypy --explicit-package-bases --follow-imports=silent server/world/level_progression_types.py server/world/level_progression_service.py server/world/combat_engine.py tests/unit/test_level_progression_service.py`
   - `python tools/lint/check_code_and_doc_hygiene.py --strict`
   - `python tools/security/run_independent_security_audit.py`

5. Deliverables:
   - Write full implementation report to `c:\Projects\FreeExile\.agents\teamwork\worker_m2_progression_2\report.md`
   - Write handoff report with test evidence to `c:\Projects\FreeExile\.agents\teamwork\worker_m2_progression_2\handoff.md`
   - Notify parent (`6f4a2aa2-4315-4660-8cb7-8352a7220c95`) via `send_message`.