declare const SITEMAP_PROJECTION_GRACE_MS: number;
interface SitemapProjectionFeed {
  compactedThrough: string;
  /** Unix epoch milliseconds when readers started filtering through this key. */
  publishedAt: number;
}
interface SitemapProjectionManifest {
  version: 1;
  feeds: Record<string, SitemapProjectionFeed>;
}
interface SitemapProjectionFiles {
  indexKeys: string[];
  deltaKeys: string[];
}
declare function emptySitemapProjectionManifest(): SitemapProjectionManifest;
declare function parseSitemapProjectionManifest(value: unknown): SitemapProjectionManifest;
declare function decodeSitemapProjectionManifest(text: string): SitemapProjectionManifest;
declare function selectSitemapProjectionFiles(indexKeys: readonly string[], deltaKeys: readonly string[], manifest: SitemapProjectionManifest | undefined): SitemapProjectionFiles;
declare function withSitemapProjectionFeed(manifest: SitemapProjectionManifest, feedpathHash: string, feed: SitemapProjectionFeed): SitemapProjectionManifest;
export { SITEMAP_PROJECTION_GRACE_MS, SitemapProjectionFeed, SitemapProjectionFiles, SitemapProjectionManifest, decodeSitemapProjectionManifest, emptySitemapProjectionManifest, parseSitemapProjectionManifest, selectSitemapProjectionFiles, withSitemapProjectionFeed };