# BRIEFING — 2026-10-01T08:08:50Z

## Mission
Implement Level Progression EXP Curve, Schema Extensions, Matrix Service and Seeder for Milestone M1 (Progression 1) with complete integrity and rigorous verification.

## 🔒 My Identity
- Archetype: teamwork_preview_worker
- Roles: implementer, qa
- Working directory: c:\Projects\FreeExile\.agents\teamwork\worker_m1_progression_1
- Original parent: orchestrator_4 (conversation ID: 6f4a2aa2-4315-4660-8cb7-8352a7220c95)
- Milestone: M1_progression_1

## 🔒 Key Constraints
- File ownership: Only edit `server/world/level_progression_curve.py`, `server/world/game_design_matrix_schema.py`, `server/world/game_design_matrix_types.py`, `server/world/game_design_matrix_service.py`, `server/world/game_design_matrix_seeder.py`, `data/game_design_matrix.db`.
- Genuine implementation: No cheating, no hardcoded results, no dummy facades.
- Strictly monotonically increasing cumulative EXP ($target\_exp = cumulative\_exp$ strictly increasing from 1 to 100 with $target\_exp(100) > target\_exp(99)$).
- Level 1-20 cumulative EXP < 0.1% total; Level 99->100 delta >= 30% of lifetime 1-98.
- Tiered death penalty: 1-60: 0.0, 61-80: 0.05, 81-89: 0.10, 90-98: 0.15, 99: 0.25, 100: 0.0.
- Level gap safe range (5), penalty exp (0.60), monster benchmark exp.
- Schema extension: 6 new columns in `progression_benchmarks` (13 columns total).
- Quantitative limits: Python logic files <= 350 lines (soft), <= 500 lines (hard).

## Current Parent
- Conversation ID: 6f4a2aa2-4315-4660-8cb7-8352a7220c95
- Updated: 2026-10-01T08:08:50Z

## Task Summary
- **What to build**: Level progression curve calculator, schema update, dataclass update, service query update, seeder update, database re-seeding.
- **Success criteria**: All tests pass (`test_game_design_matrix.py`, `test_level_progression_e2e.py -k test_f02`), matrix verification passes (`verify_game_design_matrix.py --sync`), hygiene passes (`check_code_and_doc_hygiene.py --strict`).
- **Interface contracts**: `PROJECT.md`, `game_design_matrix_schema.py`, `game_design_matrix_types.py`.
- **Code layout**: `server/world/`.

## Key Decisions Made
- Implemented 7-segment piecewise EXP curve in `server/world/level_progression_curve.py`.
- Defined cumulative EXP from level 1 (0) to level 100 (23,925,692,466) with $target\_exp = cumulative\_exp$ strictly monotonic.
- Built schema evolution check `_check_and_migrate_schema` to auto-migrate tables with < 13 columns.
- Preserved backward compatibility: all existing tests in `test_game_design_matrix.py` pass without change.
- Compressed seeder helpers to keep `game_design_matrix_seeder.py` under soft cap (339 <= 350 lines).

## Artifact Index
- `server/world/level_progression_curve.py` — Mathematical piecewise EXP curve calculator (104 lines)
- `server/world/game_design_matrix_schema.py` — Schema DDL with 6 new columns (230 lines)
- `server/world/game_design_matrix_types.py` — Typed row representations with slots and frozen (195 lines)
- `server/world/game_design_matrix_service.py` — Query & migration service (333 lines)
- `server/world/game_design_matrix_seeder.py` — Seeder populating all 13 columns (339 lines)
- `data/game_design_matrix.db` — SQLite database with 100 rows x 13 columns

## Change Tracker
- **Files modified**:
  - `server/world/level_progression_curve.py`: Created 7-segment piecewise EXP curve
  - `server/world/game_design_matrix_schema.py`: Added 6 columns to progression_benchmarks
  - `server/world/game_design_matrix_types.py`: Extended ProgressionBenchmarkRow with slots & frozen
  - `server/world/game_design_matrix_service.py`: Added schema evolution & full 13-column mapping
  - `server/world/game_design_matrix_seeder.py`: Seeded all 13 columns, kept under 350 lines
  - `data/game_design_matrix.db`: Re-seeded with 100 rows x 13 columns
- **Build status**: PASS (8/8 unit tests pass, test_f02 pass & xpass, verify_game_design_matrix pass)
- **Pending issues**: None

## Quality Status
- **Build/test result**: PASS (8/8 unit tests in 0.28s, E2E F2 5/5 pass/xpass, F1 5/5 pass, F4 14/14 pass)
- **Lint status**: All owned files <= 350 lines (soft cap compliant)
- **Tests added/modified**: Verified against existing and E2E test suites