{
  "cohort_id": "DEMO-30-SYNTHETIC",
  "start_utc": "2026-11-10T12:00:00Z",
  "slots": 30,
  "slot_seconds": 60,
  "horizon_seconds": 60,
  "issue_grace_seconds": 30,
  "min_coverage": 0.8,
  "outcome_contract": "BINARY_NEXT_HORIZON",
  "rival_contract": "FROZEN_ISSUE_TIME_PROBABILITY"
}