import { NextRequest, NextResponse } from "next/server.js";
/**
 * Normalize a Request or NextRequest to a NextRequest instance.
 * Ensures consistent behavior across Next.js 15 (Edge) and 16 (Node Proxy).
 * @internal
 */
export declare function toNextRequest(input: Request | NextRequest): NextRequest;
/**
 * Normalize a Response or NextResponse to a NextResponse instance.
 * Converts plain Fetch Response objects into NextResponse while preserving
 * headers, body, status, and statusText.
 *
 * Required for environments where plain Responses lack Next.js cookie helpers.
 * @internal
 */
export declare function toNextResponse(res: Response | NextResponse): NextResponse;