# Log
- 2026-10-29 P0 contract written; P1 audit: clean data, no exclusions.
- 2026-10-29 P2 baseline: naive OLS SE computed (se_ols). P3: CR1 clustered SE, CI with t(G-1)=t(49) critical value (decision: conservative small-G convention).
- 2026-10-29 P4: rerun identical; checks recorded. Gate run next.
- 2026-10-29 P5: report and claims written; final gate run.