--- a/buggy.py
+++ b/buggy.py
@@ -2,6 +2,6 @@
 
 
 def add_event(user: str, event: str) -> list[str]:
-    shared = get_buffer("shared")
-    shared.append(event)
-    return shared
+    user_buffer = get_buffer(user)
+    user_buffer.append(event)
+    return user_buffer
