# Progress — explorer_m1_progression_2

Last visited: 2026-10-01T00:55:00Z
Status: Completed

## Tasks
- [x] Record dispatch message and initialize BRIEFING
- [x] Read references: ORIGINAL_REQUEST.md, PROJECT.md, spec_miner_survey_exp_1 report & handoff
- [x] Inspect existing `game_design_matrix_schema.py` and `progression_benchmarks` table definition
- [x] Inspect existing SQLite database `data/game_design_matrix.db` and queries in `game_design_matrix_service.py` / codebase
- [x] Analyze schema extension, constraints, backwards compatibility, and migration strategy
- [x] Formulate exact DDL and SQL migration script for Worker M1
- [x] Write `report.md`
- [x] Write `handoff.md`
- [x] Send completion message to parent