This

fresh.gen.ts

@@ -10,7 +10,7 @@ import * as $index from "./routes/index.tsx";
 import * as $post_slug_ from "./routes/post/[slug].tsx";
 import * as $posts from "./routes/posts.tsx";
 import * as $projects from "./routes/projects.tsx";
-
+import * as $Example from "./islands/Example.tsx";
 import type { Manifest } from "$fresh/server.ts";
 
 const manifest = {
@@ -24,7 +24,9 @@ const manifest = {
     "./routes/posts.tsx": $posts,
     "./routes/projects.tsx": $projects,
   },
-  islands: {},
+  islands: {
+    "./islands/Example.tsx": $Example,
+  },
   baseUrl: import.meta.url,
 } satisfies Manifest;