# Log

• 2026-10-30 P0 contract written.
• 2026-10-30 P1 audit: clean balanced panel, no exclusions. Note: shell cwd error briefly created data/out/; removed, panel.csv SHA verified unchanged.
• 2026-10-30 P2 baseline: conventional OLS SE computed (se_ols) in analysis.py.
• 2026-10-30 P3 decision: CR1 cluster SE (statsmodels, use_correction=True), CI with t(G-1) critical value. No randomness -> random_seed null.
• 2026-10-30 P4 verification checks recorded in checks.md.
• 2026-10-30 P4 passed (gate receipt 20261030T054851). P5 report and claims written; final gate run.
• 2026-10-30 Final gate PASSED (20261030T054910). Task complete.