# BRIEFING — 2026-10-01T02:40:00Z

## Mission
Execute M1 Iteration 2 progression curve parameter tuning (0.35 factor), seeder robustness/typing improvements, e2e test suite alignment, database re-seeding, and empirical challenge verification.

## 🔒 My Identity
- Archetype: teamwork_preview_worker
- Roles: implementer, qa
- Working directory: c:\Projects\FreeExile\.agents\teamwork\worker_m1_progression_2
- Original parent: 6f4a2aa2-4315-4660-8cb7-8352a7220c95
- Milestone: M1 Iteration 2

## 🔒 Key Constraints
- File Ownership:
  - `server/world/level_progression_curve.py`
  - `server/world/game_design_matrix_service.py`
  - `server/world/game_design_matrix_seeder.py`
  - `tests/e2e/test_level_progression_e2e.py`
  - `data/game_design_matrix.db`
- DO NOT CHEAT: Genuine logic, no hardcoding test outputs, no facades.
- Code length: strictly <= 350 lines soft cap, <= 500 lines hard cap.
- Strict typing: 100% compliant with mypy strict standards.
- Empirical verification must pass 7/7 challenges.

## Current Parent
- Conversation ID: 6f4a2aa2-4315-4660-8cb7-8352a7220c95
- Updated: 2026-10-01T02:40:00Z

## Task Summary
- **What to build**:
  1. `level_progression_curve.py`: Updated deltas[99] factor to 0.35. Verified mathematical metrics:
     - `sum_1_98 = 17,989,242,456`
     - `deltas[99] = 6,296,234,859`
     - `total_lifetime = 24,285,477,315`
     - `ratio_vs_98 = 35.0%` (>= 30.0%)
     - `ratio_vs_lifetime = 25.9259%` (in [25.0%, 35.0%])
  2. `test_level_progression_e2e.py`: Updated calc_delta_exp(99) to 0.35, restored strict assertion [0.25, 0.35], removed xfail on F02 benchmark column tests (now 24 clean passed).
  3. `game_design_matrix_service.py`: Verified progression_benchmarks count >= 100 before early return in `seed_canonical_data()`, return type `Dict[str, Any]`.
  4. `game_design_matrix_seeder.py`: Exposed `seed_canonical_data()` convenience function, fixed `_resolve_quest_zone` typing, file size maintained at 326 lines (<= 350).
  5. Re-seeded DB and verified all 5 test and audit suites pass cleanly.
- **Success criteria**:
  - `python tools/lint/verify_game_design_matrix.py --sync`: PASS
  - `python .agents/teamwork/challenger_m1_progression_1/challenge_exp_curve.py`: 7/7 PASS (APPROVED)
  - `pytest tests/unit/test_game_design_matrix.py`: 8/8 PASS
  - `pytest tests/e2e/test_level_progression_e2e.py -k "test_f01 or test_f02 or test_f04"`: 24/24 PASS
  - `python tools/lint/check_code_and_doc_hygiene.py --strict`: PASS (0 Hard Cap violations)
- **Interface contracts**: PROJECT.md

## Key Decisions Made
- Multiplier 0.35 is mathematically optimal ($f=0.35 \implies \frac{0.35}{1.35} = 25.9259\%$), well above the 25% floor and below 35% ceiling.
- Clean formatting of SQL insertion tuples kept `game_design_matrix_seeder.py` at 326 lines while adding the new convenience function.
- Reseed guard verifies both `story_acts > 0` and `progression_benchmarks >= 100` to prevent empty table states after schema drops.

## Artifact Index
- `DISPATCH.md` — assignment dispatch
- `BRIEFING.md` — persistent memory
- `progress.md` — liveness heartbeat
- `report.md` — detailed implementation report
- `handoff.md` — 5-component handoff report

## Change Tracker
- **Files modified**:
  - `server/world/level_progression_curve.py` (updated 0.35 factor, 104 lines)
  - `server/world/game_design_matrix_service.py` (updated reseed condition & typing, 338 lines)
  - `server/world/game_design_matrix_seeder.py` (convenience seeder & typing, 326 lines)
  - `tests/e2e/test_level_progression_e2e.py` (updated oracle, restored assertions, 406 lines)
  - `data/game_design_matrix.db` (re-seeded with canonical 0.35 curve)
- **Build status**: 100% pass across all test & verification suites
- **Pending issues**: None

## Quality Status
- **Build/test result**: PASS (Challenger 7/7, Unit 8/8, E2E 24/24, Full E2E 44 pass / 6 xfail)
- **Lint status**: 0 Hard Cap violations
- **Tests added/modified**: `tests/e2e/test_level_progression_e2e.py` aligned to 0.35 and strict assertions restored