- 2026-10-30 P0 passed: contract written.
- 2026-10-30 P1 passed: audit done, 215 empty rows to drop; no outlier removal.
- 2026-10-30 P2/P3 passed: analysis.py written; conclusion no_detectable_effect.
- 2026-10-30 P4 passed: re-run identical, checks pass, gate run 1 (P5 files absent).
- 2026-10-30 P5: report & claims written; final gate run.
- 2026-10-30 Final gate PASSED (receipt 20261030T052123.236070Z). Task complete.