# Log
- 2026-10-30 P0: read TASK.md, wrote contract.md. passed.
- 2026-10-30 P1: audited data (SHA matches), noted README discrepancy on 1992-01 empties; exclusions.csv generated by analysis.py. passed.
- 2026-10-30 P2: baselines naive & expanding mean computed in analysis.py (required keys rmse_/mae_naive, mean). passed.
- 2026-10-30 P3: ridge implemented per spec, expanding standardisation; added DM tests (extra keys dm_*) for Uncertainty. No randomness (random_seed null). passed.
- 2026-10-30 P4: verification checks 1-9 pass; running gate.
- 2026-10-30 P4 passed (gate receipt 20261030T041055 contract/repro ok). P5: report, claims written; final gate out/state/gate_receipts/20261030T041133.734169Z.json passed. All phases passed.