fix: load comfy_extras nodes even when server.py import fails

server.py cannot load due to a ComfyUI internal module shadowing bug
(comfy/utils.py file shadows utils/ package). Decouple init_extra_nodes()
from server.py loading so NODE_CLASS_MAPPINGS still gets populated from
comfy_extras (UpscaleModelLoader, etc.) even without full PromptServer setup.

Also fix app.py to re-read from cached sys.modules[nodes] after
import_custom_nodes() instead of using stale initial copy.

Fixes the upscale-model-loader runtime e2e test.

comfyui_to_python/app.py

@@ -1,4 +1,5 @@
 import copy
+import sys
 
 from typing import TextIO
 
@@ -57,6 +58,13 @@ class ExportApplication:
         }
         if self.needs_init_custom_nodes or missing_node_types:
             self.custom_node_importer()
+            # Re-read from the cached "nodes" module in sys.modules after
+            # import_custom_nodes() populates it with extras (comfy_extras,
+            # custom node directories, etc.). The original dict is a stale copy.
+            nodes_mod = sys.modules.get("nodes")
+            if nodes_mod is not None:
+                fresh_mappings = getattr(nodes_mod, "NODE_CLASS_MAPPINGS", {})
+                self.node_class_mappings = fresh_mappings
             self.base_node_class_mappings = copy.deepcopy(self.node_class_mappings)
 
         load_order = LoadOrderDeterminer(

comfyui_to_python/node_runtime.py

@@ -261,7 +261,14 @@ def import_custom_nodes() -> None:
     server_mod = _load_module("server", os.path.join(comfyui_path, "server.py"))
 
     if execution_mod is None or server_mod is None:
-        log.debug("import_custom_nodes: could not load required modules")
+        log.debug(
+            "import_custom_nodes: could not load execution/server modules. "
+            "Proceeding without full PromptServer/PromptQueue setup."
+        )
+        # Even without server, we can still populate NODE_CLASS_MAPPINGS from
+        # comfy_extras and built-in extra nodes.
+        if nodes_mod is not None and hasattr(nodes_mod, "init_extra_nodes"):
+            asyncio.run(nodes_mod.init_extra_nodes())
         return
 
     loop = asyncio.new_event_loop()