import type { PrerenderManifest } from "./manifests.js";
/**
 * Turns a prerendered value into one that varies per request.
 *
 * A value the build already prerendered is the one value guaranteed *not* to
 * measure anything: every request hits the same warm cache entry and the route
 * reads as flat no matter what it retains. That is a silent false negative, and
 * it lands on exactly the leaks being reported now — `use cache`,
 * `cacheComponents` and ISR all key on the params
 * (vercel/next.js#97938, #97776, #97424, #92287).
 *
 * The prerendered value is still the best hint available: it shows the shape
 * the app accepts. So the shape is kept and only the tail is made to move —
 * `post-0` becomes `post-{n}`, `seed` becomes `seed-{n}`.
 *
 * If the app answers 404 for params it never prerendered, the run says so
 * loudly through its non-2xx count. A noisy 404 is a far better outcome than a
 * quiet `stable`.
 */
export declare function varyingValueFrom(prerendered: string): string;
/**
 * Sample values lifted from paths the build actually prerendered.
 *
 * A skeleton full of placeholders still leaves the user guessing what a valid
 * value looks like. The build already knows: `prerender-manifest.json` lists
 * concrete paths, each pointing back at its template through `srcRoute`, so a
 * template like `/posts/[slug]` can be filled with a real `post-0` that will
 * resolve on the first try.
 */
export declare function sampleValuesFromManifest(manifest: PrerenderManifest | undefined, routeTemplate: string): Record<string, string> | null;
/**
 * The `next-leak.config.json` that would measure the routes a run had to skip.
 *
 * Printed rather than merely referenced: telling someone a config file exists
 * and leaving them to work out its shape is the difference between a run they
 * can fix in ten seconds and one they abandon.
 */
export declare function renderConfigSkeleton(routeTemplates: readonly string[], manifest?: PrerenderManifest | undefined): string | null;
/** Whether a rendered skeleton still needs the user to fill anything in. */
export declare function hasPlaceholders(skeleton: string): boolean;