import type { SuperJSON } from "superjson";
import type { EasyFS } from "../../google-aistudio/browser/utils.js";
import { FsDuplex } from "../common/fs-duplex.js";
/**
 * @deprecated This class is part of the old file-based communication protocol.
 * It will be replaced by the new `fs-duplex` module implementation.
 */
export declare class BrowserFsDuplex<T> extends FsDuplex<T> {
    private _fs;
    private _filename;
    private _lastContent;
    private _isDestroyed;
    private _idleCallbackId;
    constructor(superjson: SuperJSON, _fs: EasyFS, _filename: string);
    get filename(): string;
    /**
     * Starts the polling mechanism using requestIdleCallback.
     */
    start(): void;
    private _poll;
    /**
     * Writes data to the task file in the browser's filesystem.
     * @param payload A partial task object to be merged and written.
     */
    write(payload: Partial<T>): Promise<void>;
    /**
     * Destroys the duplex channel, stops polling, and deletes the task file.
     */
    destroy(): Promise<void>;
}
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