- 2026-10-30 P0 passed: contract written. P1 started.
- 2026-10-30 P1 passed: audit done; one README discrepancy (1992-01 change values present) recorded, used as given.
- 2026-10-30 P2/P3 passed: baselines and ridge in single script; added supplementary DM tests (not required) under results.json "supplementary".
- 2026-10-30 P4 passed: reproducibility + leakage checks (checks.md). Edited data_issues wording, re-ran, identical across reruns.
- 2026-10-30 P5 passed: report and claims written.