1- 2026-10-30 P0 passed: contract written.2- 2026-10-30 P1: data audited; hashes match README; only anomaly is blank UNRATE 2025-10 (out of sample). Decision: truncate to 1959Q4–2019Q4 levels; require 3 months per quarter.3- 2026-10-30 P1 passed. P2/P3: analysis.py written; beta=-0.256, HAC SE 0.036 (4 lags); Chow F=6.09 p=0.0026 -> unstable. Decision: add HAC dummy-interaction Wald tests as supplementary since slopes nearly equal (rejection driven jointly/intercept).4- 2026-10-30 P4 passed: deterministic rerun identical; all checks pass.5- 2026-10-30 P5 passed: report, claims written. Task complete.6