Fix #9141 Ensure “Update” repopulates model lists

folder_paths.py

@@ -137,6 +137,15 @@ def set_user_directory(user_dir: str) -> None:
     user_directory = user_dir
 
 
+def clear_filename_list_cache() -> None:
+    """
+    Clear cached filename lists so new files on disk are discovered.
+    """
+    global filename_list_cache
+    filename_list_cache.clear()
+    cache_helper.clear()
+
+
 # System User Protection - Protects system directories from HTTP endpoint access
 # System Users are internal-only users that cannot be accessed via HTTP endpoints.
 # They use the '__' prefix convention (similar to Python's private member convention).

server.py

@@ -676,6 +676,7 @@ def node_info(node_class):
 
         @routes.get("/object_info")
         async def get_object_info(request):
+            folder_paths.clear_filename_list_cache()
             with folder_paths.cache_helper:
                 out = {}
                 for x in nodes.NODE_CLASS_MAPPINGS: