# Log

• 2026-10-30 P0: read TASK.md, wrote contract.
• 2026-10-30 P1: audited data. 1200 data lines; 36 corrupted lines (file lines 701-736); 30 prices quoted with thousands separator (unambiguous under CSV quoting, parsed by removing comma). Decision: keep the 30 (field is readable unambiguously), exclude the 36.
• 2026-10-30: NOTE: state/analysis files were accidentally created in data/out/ (shell cwd error); moved to out/ and data/out removed. data/ files unchanged (SHA-256 re-verified).
• 2026-10-30 P2/P3: baseline = control totals (n=1200, sum=471287000, implied mean 392739.17); analysis.py written and run.
• 2026-10-30 P4: determinism and 15 consistency checks passed.
• 2026-10-30 P5: report and claims written.