{
 "P0": {
  "status": "passed",
  "checks": [
   "TASK.md read fully; contract.md written"
  ],
  "notes": ""
 },
 "P1": {
  "status": "passed",
  "checks": [
   "SHA-256 matches README",
   "schema/missing/duplicates/date gaps audited",
   "exclusions.csv sums: 2498-2498=0 analysed"
  ],
  "notes": "n_treated=0: estimand infeasible"
 },
 "P2": {
  "status": "passed",
  "checks": [
   "baseline_metric computed and identity-checked vs (y_last-y_first)/(n-1)"
  ],
  "notes": ""
 },
 "P3": {
  "status": "passed",
  "checks": [
   "analysis.py reads only data/, deterministic, no seed; estimator implemented, returns null when no treated rows"
  ],
  "notes": "effect not estimable; conclusion premise_invalid per TASK.md"
 },
 "P4": {
  "status": "passed",
  "checks": [
   "clean rerun byte-identical",
   "checks.md items 1-8 pass",
   "gate run 1: receipt out/state/gate_receipts/20261030T044306.215163Z.json \u2014 all contract/repro checks ok; only failure was phase_ledger non-terminal (P4,P5 in progress at the time)"
  ],
  "notes": ""
 },
 "P5": {
  "status": "passed",
  "checks": [
   "report.md has 6 sections citing results keys",
   "claims.json 3 claims, keys resolve",
   "final gate run recorded below",
   "gate run 2: receipt out/state/gate_receipts/20261030T044311.824778Z.json \u2014 passed"
  ],
  "notes": ""
 }
}