# Log
- 2026-10-30: P0 contract written. Read TASK.md, data/README.md.
- 2026-10-30: P1 data audit done; README/data discrepancy at 1992-01 noted, handled as-is.
- 2026-10-30: P2 baselines computed (rmse_naive 0.883, rmse_mean 0.544). P3 ridge implemented in out/analysis.py; rmse_ridge 0.561. Decision: add DM test (HLN) for Uncertainty section.
- 2026-10-30: P4 verification passed (12 checks, see checks.md).
- 2026-10-30: P5 report.md and claims.json written; all phases passed.