- 2026-10-29: P0 passed (contract written).
- 2026-10-29: P1 passed (clean data, no exclusions).
- 2026-10-29: P2/P3 passed (analysis.py with Brent/grid/SLSQP validation + closed form).
- 2026-10-29: P4 passed (identical re-run, all consistency checks pass).
- 2026-10-29: P5 passed (report.md, claims.json). Task complete.