import type { AnyServer } from "./server/server.js";
export type { ResponseBodyHook, ResponseHeadersHook, ResponseObserverMethods, ResponseObserverRuntime, } from "./server/response-observer-runtime.js";
/** A server shape with the opt-in response observation methods installed. */
export type ResponseObserverServer<S extends AnyServer> = S & import("./server/response-observer-runtime.js").ResponseObserverMethods;
/** A plugin that enables response header, body, and raw-response observation methods. */
export type ResponseObserverPlugin = (<S extends AnyServer>(app: S) => ResponseObserverServer<S>) & {
    readonly pluginName?: string;
};
/**
 * Enable the response observation methods on a server.
 *
 * The default server does not carry the header, body, or raw-response observation adapters. Apply
 * this plugin before using those methods:
 *
 * ```ts
 * import { responseObserver } from "@nifrajs/core/response-observer"
 * const app = server().use(responseObserver()).onResponseHeaders((headers) => {
 *   headers.set("cache-control", "no-store")
 * })
 * ```
 */
export declare function responseObserver(): ResponseObserverPlugin;
/** Attach the opt-in observer runtime to a middleware bundle that uses response observation. */
export declare function withResponseObserver<T extends object>(middleware: T): T;
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