Add spaces.GPU no-op handler and dependency to satisfy Spaces startup check

app.py

@@ -8,6 +8,7 @@ from huggingface_hub import snapshot_download
 from PIL import Image
 
 from runners.simple_runner import SimpleRunner
+from spaces import GPU
 
 
 # -----------------------------------------------------------------------------
@@ -184,6 +185,12 @@ def build_ui() -> gr.Blocks:
 # Expose a top-level Gradio app for Hugging Face Spaces
 app = build_ui()
 
+
+@GPU()
+def _warmup_gpu():
+    # CPU-only Space; this is a no-op to satisfy GPU startup checks
+    return "ok"
+
 if __name__ == "__main__":
     # Local run. On Spaces, the platform launches the app automatically.
     app.launch()

requirements.txt

@@ -18,3 +18,4 @@ pytorch_fid==0.3.0
 torch
 torchvision
 clip @ git+https://github.com/openai/CLIP.git@a1d071733d7111c9c014f024669f959182114e33
+spaces>=0.28.3