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HF_RUNTIME_FIX_RECEIPT.md

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+# HF Runtime Fix Receipt
+
+## Patch target
+`HF_Substrate_Video_Atomization_Runtime_v0_1_PATCHED3.zip`
+
+## Error fixed
+The Hugging Face Space crashed during `import gradio as gr` because `gradio==4.44.0` imports:
+
+```python
+from huggingface_hub import HfFolder, whoami
+```
+
+The deployed environment resolved `huggingface_hub` to a newer incompatible release where `HfFolder` is no longer exported from `huggingface_hub.__init__`.
+
+## Fix applied
+Pinned `huggingface_hub` to a Gradio-compatible release:
+
+```text
+huggingface_hub==0.25.2
+```
+
+This keeps `HfFolder` available for Gradio 4.44.0's OAuth import path.
+
+## Existing runtime boundary preserved
+- `runtime.txt` remains `python-3.11`.
+- README Space metadata still requests Python 3.11.
+- App logic was not mutated.
+- This patch only changes dependency settlement and adds this receipt.
+
+## Expected HF rebuild behavior
+After uploading this packet to the Space and restarting/rebuilding, the container should reinstall dependencies with the pinned `huggingface_hub` version and pass the Gradio import stage.

HF_Substrate_Video_Atomization_Runtime_v0_1_PATCHED3.zip.sha256

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+15a33a4d902807ecba9d0012f546e8d3952001e0d6ed0f6f3c011f707412d9dd  /mnt/data/HF_Substrate_Video_Atomization_Runtime_v0_1_PATCHED3.zip

README.md

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 ## Runtime compatibility patch
 
 This Space pins the Python runtime to 3.11 because Python 3.13 removed the stdlib `audioop` module used indirectly by Gradio's audio/video processing path through `pydub`. The requirements also include `audioop-lts` as a fallback compatibility shim.
+
+## Runtime compatibility patch 2
+
+This packet pins `huggingface_hub==0.25.2` because `gradio==4.44.0` imports `HfFolder` during startup. Newer `huggingface_hub` releases can remove that export path, causing `ImportError: cannot import name 'HfFolder' from 'huggingface_hub'`.
+

requirements.txt

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 gradio==4.44.0
+huggingface_hub==0.25.2
 opencv-python-headless
 numpy
 pandas