Log
- 2026-10-30 P0: read TASK.md, README, gate_spec; contract written.
- 2026-10-30 P1: SHA-256 of all 5 extracts match README/bundle; all files read in full.
- 2026-10-30 P2-P5: baseline, analysis, verification (identical rerun), report and claims done; all phases passed. Result: unverifiable=[R3], n_verified=4.