diff --git a/packages/sdk-playground/src/main.ts b/packages/sdk-playground/src/main.ts
index d6269ce05..e00ee7a5b 100644
--- a/packages/sdk-playground/src/main.ts
+++ b/packages/sdk-playground/src/main.ts
@@ -85,6 +85,10 @@ class PlaygroundPreview implements PreviewAdapter {
       this.handlers = this.handlers.filter((h) => h !== handler);
     };
   }
+
+  attachSync(_comp: Composition): () => void {
+    return () => {};
+  }
 }
 
 // ── Preview iframe ────────────────────────────────────────────────────────────