{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://tiitrust.com/schemas/decision-receipt-v1.json",
  "title": "TII Decision Receipt",
  "type": "object",
  "required": ["receipt_id", "decision", "reason_codes", "dimensions", "execution", "timestamp"],
  "properties": {
    "receipt_id": {"type": "string"},
    "decision": {"enum": ["PERMIT", "NEEDS_EVIDENCE", "REQUIRE_HUMAN", "DENY", "ERROR", "CONFLICT", "QUARANTINE"]},
    "reason_codes": {"type": "array", "items": {"type": "string"}},
    "dimensions": {"type": "object"},
    "execution": {"type": "object"},
    "outcome": {"type": ["object", "null"]},
    "timestamp": {"type": "string", "format": "date-time"},
    "receipt_hash": {"type": "string"}
  }
}