diff --git a/app/sitemap.ts b/app/sitemap.ts
new file mode 100644
index 0000000..c4eba69
--- /dev/null
+++ b/app/sitemap.ts
@@ -0,0 +1,14 @@
+import type { MetadataRoute } from 'next';
+import { source } from '@/lib/source';
+import { pageUrl } from '@/lib/markdown';
+
+// basePath applies to the route itself, so this is served at /docs/sitemap.xml.
+export const revalidate = false;
+
+export default function sitemap(): MetadataRoute.Sitemap {
+  return source.getPages().map((page) => ({
+    url: pageUrl(page),
+    changeFrequency: 'weekly',
+    priority: page.url === '/' ? 1 : 0.7,
+  }));
+}