import type { SitemapEntry } from './buildSitemapEntries.js';
/**
 * Serializes sitemap entries to a clean, indented XML STRING — valid for crawlers
 * and readable in the browser as the native XML tree (indented, collapsible,
 * syntax-highlighted by the browser itself).
 *
 * NO XSLT stylesheet: browsers (Chrome et al.) are REMOVING XSLT support, so a
 * <?xml-stylesheet?> approach is a dead end — it shows a deprecation warning now
 * and will break soon. Instead we serve plain XML with the correct Content-Type;
 * the browser renders its built-in formatted XML view (the "code tree" look) with
 * no transformation needed.
 *
 *   // app/sitemap.xml/route.ts
 *   import { buildSitemapXml } from '@intecion/ipal-kit'
 *   import { sitemap } from '@/lib/content'
 *   export const dynamic = 'force-dynamic'
 *   export async function GET() {
 *     const entries = await sitemap()
 *     const xml = buildSitemapXml(entries)
 *     return new Response(xml, {
 *       headers: { 'Content-Type': 'application/xml; charset=utf-8' },
 *     })
 *   }
 *
 * The indentation makes the raw XML pleasant to read; the browser's default XML
 * viewer adds the tree/fold UI. Crawlers read the XML as usual.
 *
 * NOTE: if you use this custom route, DON'T also keep app/sitemap.ts — pick one
 * (this route OR the Next MetadataRoute). Two sitemaps confuse crawlers.
 */
export declare function buildSitemapXml(entries: SitemapEntry[]): string;