{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "required": ["source-contract", "schema-contract", "processing-semantics", "correctness", "performance", "recovery-tests", "lineage", "evidence-receipt-ids"],
  "properties": {
    "source-contract": {"type": "object", "required": ["owner", "version", "freshness-sla"]},
    "schema-contract": {"type": "object", "required": ["grain", "primary-key", "schema-version", "evolution-policy"]},
    "processing-semantics": {"type": "object", "required": ["delivery", "event-time", "watermark", "late-data-policy", "checkpointing"]},
    "correctness": {"type": "object", "required": ["dedup", "reconciliation", "replay"]},
    "performance": {"type": "object", "required": ["throughput", "latency", "cost-baseline"]},
    "recovery-tests": {"type": "array", "minItems": 1},
    "lineage": {"type": "array", "minItems": 1},
    "evidence-receipt-ids": {"type": "array", "minItems": 1, "items": {"type": "string"}}
  }
}