/** Return the server-requested delay for a typed temporary auth rejection. */
export declare function authBusyRetryDelayMs(error: unknown): number | null;
/** One pending manual reconnect for Socket.IO CONNECT_ERROR auth overloads. */
export declare class AuthBusyReconnect {
    private timer;
    get pending(): boolean;
    schedule(error: unknown, reconnect: () => void): boolean;
    cancel(): void;
}