https://huggingface.co/agents-course/notebooks/resolve/main/unit2/langgraph/mail_sorting.ipynb
hf download hf://agents-course/notebooks/unit2/langgraph/mail_sorting.ipynb
curl -L -o mail_sorting.ipynb https://huggingface.co/agents-course/notebooks/resolve/main/unit2/langgraph/mail_sorting.ipynb
