diff --git a/lib/s3.ts b/lib/s3.ts
index c45a6569..1261f18d 100644
--- a/lib/s3.ts
+++ b/lib/s3.ts
@@ -90,7 +90,10 @@ export async function listUserObjects(userId: string, folder: string) {
       type: 'file',
       mime: item.Key?.endsWith('.md') ? 'text/markdown' : 'application/octet-stream',
       etag: item.ETag
-    })) || [];
+    }))
+    // Filter out placeholder files and empty directory markers
+    .filter(item => !item.title.startsWith('.placeholder') && item.title !== '')
+    || [];
   } catch (error) {
     console.error('Error listing objects:', error);
     throw error;