/**
 * SSG — Static Site Generation (Memory-Served)
 *
 * Pre-renders pages at startup and stores the HTML in the `builtAssets` map.
 * Pages are served from memory (zero syscalls) instead of re-running SSR on every request.
 *
 * Features:
 * - Pre-render all static (non-dynamic) routes at startup
 * - Store rendered HTML in memory-served `builtAssets`
 * - Skip dynamic routes ([id]) unless explicitly configured
 * - Dev mode: bypass cache for fresh renders
 * - Page exports `ssg = true` or `ssg = { revalidate: 60 }` to opt in
 *
 * @example
 * ```tsx
 * // app/about/page.tsx
 * export const ssg = true; // Pre-render at startup
 *
 * export default function AboutPage() {
 *   return <main><h1>About Us</h1></main>;
 * }
 * ```
 */
import type { Route } from "./router";
export interface SSGEntry {
    html: string;
    renderedAt: number;
    revalidateMs?: number;
}
/**
 * Check if a pre-rendered page exists and is still fresh.
 * Returns the HTML string if cached and valid, otherwise null.
 */
export declare function getPrerendered(pathname: string): string | null;
/**
 * Store a pre-rendered page in memory.
 */
export declare function setPrerendered(pathname: string, html: string, revalidateMs?: number): void;
/**
 * Pre-render all eligible routes at startup.
 * Call this with the discovered routes and a render function.
 *
 * @param routes - Discovered routes from discoverRoutes()
 * @param renderRoute - Function that renders a route to HTML (provided by app-router)
 * @returns Number of pages pre-rendered
 */
export declare function prerender(routes: Route[], renderRoute: (route: Route) => Promise<string>): Promise<number>;
/**
 * Clear all pre-rendered pages (useful for dev mode or cache invalidation).
 */
export declare function clearSSGCache(): void;
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