import type { CacheProviderConfig } from 'astro';
/**
 * Configure the Vercel CDN cache provider for Astro route caching.
 *
 * Uses `Vercel-CDN-Cache-Control` and `Vercel-Cache-Tag` headers
 * for Vercel's edge cache, and `invalidateByTag()` from `@vercel/functions`
 * for tag-based invalidation.
 */
export declare function cacheVercel(): CacheProviderConfig;