{
  "name": "event.task.state \u2014 a task fails because the file vanished from the server",
  "description": "Carries the summary so the row repaints in full, and the error whenever the new state is failed or retry_wait. Note that error.code is a TaskErrorCode string, not a JSON-RPC code: the RPC that reported this failure succeeded.",
  "notification": {
    "jsonrpc": "2.0",
    "method": "event.task.state",
    "params": {
      "taskId": "3f7a2b1c-5d6e-4f80-9a1b-2c3d4e5f6071",
      "state": "failed",
      "previousState": "downloading",
      "summary": {
        "taskId": "3f7a2b1c-5d6e-4f80-9a1b-2c3d4e5f6071",
        "filename": "ubuntu-26.04-desktop-amd64.iso",
        "saveDir": "/home/sami/Downloads/Programs",
        "url": "https://releases.ubuntu.com/26.04/ubuntu-26.04-desktop-amd64.iso",
        "effectiveUrl": "https://releases.ubuntu.com/26.04/ubuntu-26.04-desktop-amd64.iso",
        "sizeBytes": 6228541440,
        "downloadedBytes": 0,
        "state": "failed",
        "speedBps": 0,
        "etaSeconds": null,
        "resumable": true,
        "segments": 8,
        "categoryId": "programs",
        "queueId": null,
        "queuePosition": null,
        "description": null,
        "createdAt": "$isoDate",
        "lastTryAt": "$isoDate",
        "completedAt": null,
        "error": {
          "code": "not_found",
          "message": "the server returned 404 when resuming; the file is gone",
          "httpStatus": 404,
          "retryable": false,
          "cause": null,
          "attempt": 3,
          "nextRetryAt": null
        }
      },
      "error": {
        "code": "not_found",
        "message": "the server returned 404 when resuming; the file is gone",
        "httpStatus": 404,
        "retryable": false,
        "cause": null,
        "attempt": 3,
        "nextRetryAt": null
      }
    }
  },
  "assertions": [
    "error is present on every failed or retry_wait transition, and also on a paused transition the daemon entered unilaterally -- never on a paused transition the user or scheduler requested",
    "error.code is a TaskErrorCode, never a JSON-RPC ErrorCode \u2014 the two are different spaces",
    "retryable false means the scheduler will not pick this up again on its own"
  ]
}