Method cancel

packages/agent-core/src/services/task/task.ts:165–165

* Cancel a running task. Throws: * - `TaskNotFoundError` → 40406 * - `TaskAlreadyFinishedError` → 40904 (daemon emits custom envelope * with `data:{cancelled:false}`)

(sessionId: string, taskId: string)

   *      with `data:{cancelled:false}`)
   */
  cancel(sessionId: string, taskId: string): Promise<{ cancelled: true }>;
}

// eslint-disable-next-line @typescript-eslint/no-redeclare