# BRIEFING — 2026-10-01T02:20:00Z

## Mission
Empirically stress-test SQLite schema and GameDesignMatrixService integration for progression_benchmarks table and provide verdict (APPROVE or REQUEST_CHANGES).

## 🔒 My Identity
- Archetype: teamwork_preview_challenger
- Roles: critic, specialist
- Working directory: c:\Projects\FreeExile\.agents\teamwork\challenger_m1_progression_2
- Original parent: 6f4a2aa2-4315-4660-8cb7-8352a7220c95
- Milestone: milestone_1_progression
- Instance: 2 of 2

## 🔒 Key Constraints
- Review-only — do NOT modify implementation code directly
- Must write and run empirical challenge script
- Verify boundary inputs, idempotency, CHECK constraints, and in-memory SQLite
- Document empirical findings and issue verdict (APPROVE or REQUEST_CHANGES)

## Current Parent
- Conversation ID: 6f4a2aa2-4315-4660-8cb7-8352a7220c95
- Updated: 2026-10-01T02:17:06Z

## Review Scope
- **Files to review**: `server/world/game_design_matrix_service.py`, `tests/test_game_design_matrix.py`, `data/game_design_matrix.db`, `tools/lint/verify_game_design_matrix.py`
- **Interface contracts**: `.agents/teamwork/orchestrator_4/PROJECT.md`
- **Review criteria**: boundary validation, schema integrity & CHECK constraints, idempotency, in-memory DB support

## Key Decisions Made
- Authored standalone adversarial challenge harness `challenge_progression_benchmarks.py` covering 45 stress test cases across 5 test suites.
- Executed harness and verified all 45 stress tests pass with 0 defects.
- Issued verdict: **APPROVE**.

## Artifact Index
- `challenge_progression_benchmarks.py` — Standalone adversarial test harness
- `handoff.md` — Final challenge report and verdict (APPROVE)
- `progress.md` — Liveness heartbeat and execution log
- `DISPATCH.md` — Record of dispatch instructions

## Attack Surface
- **Hypotheses tested**:
  - Boundary input rejection (levels 0, 101, -1, 999, non-integers, SQL inserts) -> Confirmed safe (rejection & CHECK integrity errors).
  - Seeder idempotency over 5+ runs with `force=True` and `force=False` -> Confirmed zero-drift, exactly 100 rows preserved.
  - SQLite CHECK constraints (negative exp, ratio > 1.0, invalid affix tiers, etc.) -> Confirmed strictly enforced.
  - In-memory lifecycle and multi-instance isolation -> Confirmed completely isolated and valid.
  - Legacy 7-column schema auto-migration -> Confirmed clean drop and rebuild to 13 columns.
- **Vulnerabilities found**: None.
- **Untested angles**: Milestone 2 combat/zone EXP distribution services (`LevelProgressionService`) — out of scope for Milestone 1.

## Loaded Skills
- None