1- 2026-10-30 P0 passed: contract written.2- 2026-10-30 P1 passed: audit done, SHA ok, 215 holiday rows dropped.3- 2026-10-30 P2 passed: zero-change RMSE baseline 4.876 bp.4- 2026-10-30 P3 passed: analysis.py written; Welch chosen for Monday CI; robustness keys added.5- 2026-10-30 P4 passed: reproducibility and consistency checks (checks.md).6- 2026-10-30 P5 passed: report, claims written. Task complete.7