1- 2026-10-30 P0 passed: contract written.2- 2026-10-30 P1 passed: 12 negative-hours rows excluded (sensitivity kept).3- 2026-10-30 P2 passed: naive slope computed.4- 2026-10-30 P3 passed: adjusted OLS with HC1 SEs; decision: HC1 robust SEs for all models.5- 2026-10-30 P4: reproducibility & consistency checks passed; running gate.6- 2026-10-30 P4 passed (gate receipt 20261030T040641); P5 report+claims written; final gate run.7- 2026-10-30 P5 passed; final gate PASSED (20261030T040712.965760Z).8