# Log

• 2026-10-30 P0: contract written.
• 2026-10-30 P1: audit done; decided to exclude 12 rows with negative training_hours (sensitivity: full sample).
• 2026-10-30 P2/P3: naive and adjusted (skill_index) OLS with HC1 SEs computed.
• 2026-10-30 P4: clean rerun is identical and the consistency checks pass; running the gate.
• 2026-10-30 P5: report and claims written; final gate run.