effects/v1

URI: https://docs.nylorun.com/a2a/effects/v1

{
  "statusUpdate": {
    "taskId": "t1.…",
    "contextId": "ticket-4821",
    "status": {
      "state": "TASK_STATE_WORKING",
      "timestamp": "2026-11-02T09:14:07.112Z",
      "message": {
        "role": "ROLE_AGENT",
        "parts": [{ "text": "An action's outcome is uncertain; the agent's operator must resolve it before the task continues." }]
      }
    },
    "metadata": {
      "https://docs.nylorun.com/a2a/effects/v1": { "uncertain": "eff_01J…" }
    }
  }
}

When a crash loses a model call's outcome and the Runtime cannot recover it, the session is uncertain and starts no new turn (see Pauses and control). Over A2A, the task stays TASK_STATE_WORKING, because an operator may still resolve it, and its status update carries this extension.

Field	Type	Meaning
`uncertain`	string	The id of the effect whose outcome was lost. The session's `effect.uncertain` event names the same id.

The task goes on only when the session does. To stop waiting, cancel the task with CancelTask; a message sent meanwhile is queued for the next task.