Add disable_seo config to keep preview deployments out of search engines

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/types/index.ts

@@ -119,6 +119,13 @@ export type BunextConfig = {
      * `false` to skip generating it.
      */
     robots?: BunextRobotsConfig | false;
+    /**
+     * Keep the whole site out of search engines, e.g. for preview
+     * deployments. Every response gets `X-Robots-Tag: noindex, nofollow`,
+     * pages get a matching robots meta tag (overriding `meta.robots`), and
+     * `/robots.txt` disallows all crawlers regardless of `public/robots.txt`.
+     */
+    disable_seo?: boolean;
 };
 
 export type BunextConfigMiddlewareParams = {