# Log
- 2026-10-29 P0 passed: contract written.
- 2026-10-29 P1 passed: data clean, no exclusions.
- 2026-10-29 P2 passed: baseline conventional OLS SE computed (se_ols).
- 2026-10-29 P3 passed: analysis.py with CR1 cluster SE, t(G-1) CI. Decision: CR1 + t(49) critical value (Stata convention) for 50 clusters.
- 2026-10-29 P4: reproducibility & cross-checks passed; gate run.
- 2026-10-29 P4 passed (gate receipt 20261030T033337.458700Z); P5 report/claims written, final gate run.