export interface AuthGatewayStdioOptions {
    /** Request lines. */
    input: ReadableStream<Uint8Array>;
    /** Writes one response line, newline included. */
    write(line: string): void;
    /** Answers one request; never rejects (the gateway router's `route`, or a wrapper around it). */
    route(req: Request): Promise<Response>;
    /** Reported on the ready line. */
    version?: string;
}
/** Serves `opts.input` until it ends and every request it carried is answered. */
export declare function serveAuthGatewayStdio(opts: AuthGatewayStdioOptions): Promise<void>;