{
 "fields": [
  "receipt_hash",
  "contract_id",
  "agent_id",
  "kind",
  "effect_class",
  "forecast_digest",
  "predicted_adverse_bp",
  "observed_adverse",
  "error_class",
  "brier_bp",
  "model_set",
  "policy_version",
  "environment_digest",
  "observation",
  "at_ms",
  "prev_hash",
  "entry_hash"
 ],
 "integrity": "ContractForecaster.verify_corpus(); GET /fabric/contracts/calibration",
 "published_data": "NONE -- no customer or tenant rows are published; the benchmark rows in PREDICTION_BENCHMARK.json are synthetic commands run on this host",
 "storage": "per-tenant SQLite table prediction_corpus (tenant directory), hash-chained (DS CAIN/contract/v1/prediction-corpus)"
}