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app.py

@@ -11,6 +11,15 @@ All artifacts live in a system temp directory — nothing is written to the proj
 
 from __future__ import annotations
 
+# spaces MUST be imported before torch initialises CUDA (i.e. before any
+# autolabel import).  Do this first, before everything else.
+try:
+    import spaces as _spaces  # type: ignore
+    _ZERO_GPU = True
+except (ImportError, RuntimeError):
+    _spaces = None
+    _ZERO_GPU = False
+
 import os
 os.environ.setdefault("PYTORCH_ENABLE_MPS_FALLBACK", "1")
 
@@ -34,15 +43,6 @@ from autolabel.export import build_coco
 from autolabel.segment import load_sam2, segment_with_boxes
 from autolabel.utils import save_json, setup_logging
 
-# HuggingFace ZeroGPU: GPU is only available inside @spaces.GPU-decorated
-# functions.  Import gracefully so the app still runs locally without it.
-try:
-    import spaces as _spaces  # type: ignore
-    _ZERO_GPU = True
-except ImportError:
-    _spaces = None
-    _ZERO_GPU = False
-
 setup_logging(logging.INFO)
 logger = logging.getLogger(__name__)