Disable Gradio hot-reload to prevent CUDA init race (commit 593d9e9)

kimodo/demo/app.py

@@ -1,18 +1,23 @@
 # SPDX-FileCopyrightText: Copyright (c) 2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0
 
+import os
+
 # ============================================================================
 # CRITICAL: Import spaces FIRST, before any CUDA-related packages.
-# This prevents "CUDA has been initialized before importing spaces" error.
+# Disable Gradio's hot-reload watcher in HF Spaces to avoid CUDA initialization
+# errors when `spaces` package is imported in a separate thread.
 # ============================================================================
+
 try:
     import spaces  # noqa: F401 - imported early for ZeroGPU compatibility
-except ImportError:
+    # Disable Gradio hot-reload in Spaces (prevents thread race conditions)
+    os.environ["GRADIO_HOT_RELOAD"] = "False"
+except (ImportError, RuntimeError):
     pass  # Not running on HF Spaces with ZeroGPU
 
 import base64
 import logging
-import os
 import shutil
 import threading
 import time