fix

app.py

@@ -2,6 +2,8 @@ import gradio as gr
 import subprocess
 import os
 is_spaces = True if os.environ.get('SPACE_ID') else False
+if is_spaces:
+    import spaces
 from gradio_client import Client, handle_file
 from huggingface_hub import snapshot_download, HfApi
 import uuid
@@ -32,6 +34,16 @@ mage_vl_client = None
 caption_cache = {}
 
 
+# A Space configured for ZeroGPU must register at least one GPU function during
+# startup. Captioning itself runs in the separate Mage-VL Space, so this probe is
+# intentionally not placed around run_captioning (which would waste local quota
+# while waiting for remote API requests).
+if is_spaces:
+    @spaces.GPU(duration=1)
+    def zero_gpu_probe():
+        return True
+
+
 def ensure_file(url, destination):
     """Download a pinned helper only when it is actually needed."""
     destination = Path(destination)

requirements.txt

@@ -4,3 +4,4 @@ huggingface-hub==0.27.0
 python-slugify
 gradio>=4.37,<6
 gradio_client>=1.0
+spaces