export interface OfficeSocketOpts {
    /** Called for every decoded JSON text frame from the server. */
    onMessage: (msg: Record<string, unknown>) => void;
    /** Optional stderr logger (never stdout — that carries MCP frames). */
    log?: (line: string) => void;
    /** Extra metadata merged into the agent_online frame (provider, etc.). */
    meta?: Record<string, unknown>;
}
export declare class OfficeSocket {
    private readonly wsUrl;
    private readonly apiKey;
    private readonly slug;
    private readonly opts;
    private _socket;
    private _buffer;
    private _connected;
    private _destroyed;
    private _reconnectTimer;
    private _pingTimer;
    private _lastPongAt;
    private _fragOpcode;
    private _fragChunks;
    constructor(wsUrl: string, apiKey: string, slug: string, opts: OfficeSocketOpts);
    start(): void;
    /** True while a live connection is up. */
    isConnected(): boolean;
    /**
     * Send a JSON payload to the server as a WebSocket text frame. Used by the
     * bridge to reply to control frames (e.g. fb_response for the office file
     * browser). No-op if the socket isn't currently connected.
     */
    sendFrame(obj: Record<string, unknown>): void;
    destroy(): void;
    private _log;
    private _connect;
    private _closeSocket;
    private _scheduleReconnect;
    private _processBuffer;
    private _parseFrame;
    private _onFrame;
    private _sendJson;
    private _sendTextFrame;
    private _sendPong;
    private _sendPing;
    private _startHeartbeat;
    private _stopHeartbeat;
}