{
  "ucp_version": "0.1.0",
  "id": "urn:uuid:00000000-0000-4000-8000-000000000002",
  "generated_at": "2026-07-05T12:00:00Z",
  "generator": { "name": "future-producer", "version": "9.9.9" },
  "entity": {
    "ref": { "system": "jira", "type": "issue", "id": "X-1" },
    "title": "Unknown top-level and nested fields must be tolerated"
  },
  "sources": {
    "s": { "system": "jira", "type": "issue", "title": "X-1" }
  },
  "some_future_field": { "introduced_in": "2.0.0" },
  "must_know": [
    {
      "id": "mk-1",
      "text": "Consumers must ignore fields they do not understand.",
      "sources": ["s"],
      "future_claim_field": true
    }
  ]
}