## 2026-10-01T02:17:06Z
You are reviewer_m1_progression_2, a teamwork_preview_reviewer.
Your working directory is: c:\Projects\FreeExile\.agents\teamwork\reviewer_m1_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.
Read the worker handoff in c:\Projects\FreeExile\.agents\teamwork\worker_m1_progression_1\handoff.md.

Task Objective:
Review the Milestone M1 implementation from a robustness and schema compatibility perspective:
1. Examine SQLite table migration in `server/world/game_design_matrix_service.py` (`_check_and_migrate_schema`). Ensure that fresh in-memory SQLite and pre-existing file-based databases migrate without error.
2. Verify backwards compatibility of `ProgressionBenchmarkRow` and queries that access `target_exp`, `player_base_hp`, `max_affix_tier_allowed`.
3. Verify that all 13 columns are properly indexed/checked.
4. Execute verification commands:
   - `pytest tests/unit/test_game_design_matrix.py`
   - `python tools/lint/verify_game_design_matrix.py`
   - `pytest tests/e2e/test_level_progression_e2e.py -k "test_f02"`
5. Document your review in `c:\Projects\FreeExile\.agents\teamwork\reviewer_m1_progression_2\report.md` and `handoff.md`.
6. Clearly state your final verdict: APPROVE or REQUEST_CHANGES. Notify parent via `send_message`.