import type { VextFrontendMode, VextFrontendUserConfig } from "../../frontend/contract/types.js";
import type { RouteOptions } from "../../types/app.js";
import type { VextMiddleware } from "../../types/middleware.js";
export interface CreateFrontendFreshnessMiddlewareOptions {
    rootDir: string;
    config: VextFrontendUserConfig | undefined;
    mode: VextFrontendMode;
}
/**
 * Makes RouteOptions.frontend the sole policy input for runtime freshness.
 * Route/cache and frontend/page concerns intentionally remain separate: this
 * store owns only public render payloads, then replays them through the
 * current renderer for document versus page-envelope negotiation.
 */
export declare function buildFrontendFreshnessMiddleware(routeOptions: RouteOptions | undefined, options: CreateFrontendFreshnessMiddlewareOptions): VextMiddleware | undefined;