/**
 * Copyright (c) 2026 AzerothJS.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
/**
 * Options for negotiated response compression (br/gzip/deflate): the size floor below which
 * compression costs more than it saves, and the media types worth compressing. Event streams
 * and already-compressed types are skipped regardless.
 */
export interface CompressOptions {
    /** Bodies below this byte count (per Content-Length, when known) pass through. Default 1024. */
    threshold?: number;
}
/**
 * Returns `response` compressed for `request`, or `response` itself when compression does
 * not apply. Always safe to call unconditionally on the way out.
 */
export declare function compressResponse(request: Request, response: Response, options?: CompressOptions): Response;