{
  "caseId": "unsupported-3-1",
  "diagnosis": {
    "version": "3.1.0",
    "canRepair": false,
    "issues": [
      {
        "ruleId": "oas.unsupported31",
        "severity": "error",
        "title": "Unsupported OpenAPI version",
        "path": "/openapi",
        "fixable": false
      }
    ]
  },
  "preview": {
    "available": false,
    "patches": [],
    "after": null,
    "outputFile": null
  },
  "preservation": "Report unsupported version; no downgrade or preview candidate."
}