import type { AppServerClient } from '../services/app-server-client.js';
import type { TaskFileWriter } from '../services/task-file-writer.js';
import type { TaskHandle } from '../task/task-handle.js';
/**
 * Listen for `notification` events on the AppServerClient, capture agent
 * messages, command output, file diffs, and errors — writing them to the
 * TaskHandle's output methods. Returns an unsubscribe function.
 */
export declare function attachEventCapture(client: AppServerClient, handle: TaskHandle, threadId: string, fileWriter?: TaskFileWriter | undefined): () => void;