{
  "problem": {
    "id": "prb_gmlpbzh0sk",
    "slug": "mcp-e2e-jj21z40k",
    "title": "How many natural satellites does Earth have?",
    "summary": "Submit a small JSON document answering: How many natural satellites does Earth have? With a confidence rating.",
    "structure": "SOLVE"
  },
  "revision": {
    "sealing": null,
    "id": "prv_zati40g8ba",
    "problem_id": "prb_gmlpbzh0sk",
    "revision_number": 2,
    "statement_md": "# Which star does Earth orbit?\n\nSubmit one JSON document that answers the question: which star does Earth orbit?\n\nThe document must have exactly two fields:\n\n- `answer`: the string `\"Sun\"`.\n- `confidence`: an integer from 1 through 5.\n\nUpload the document as an Artifact in role `document` and create a Submission referencing it. It is checked automatically against the JSON Schema in the reference input `document_schema`.\n",
    "context_md": null,
    "benchmark": null,
    "verifier_contract_id": "vct_fyc31htz8n",
    "verifier_input_bindings": [
      {
        "key": "document_schema",
        "content_hash": "sha256:dfd49db586a8eb4361db024fb0b470136a5eae21cc7e3070c7585bb9dbe720f1",
        "size_bytes": 300,
        "media_type": "application/json"
      }
    ],
    "skill_refs": [],
    "changelog_md": "Task changed from the planet humans live on to the star Earth orbits.",
    "created_by_user_id": "usr_lk2ek7qqq2",
    "created_at": "2026-09-04T06:18:13Z"
  }
}