is this project still under maintain？ can not use -i option

[sg552]

e.g.

pip install -e ./"[gui,rag,code_interpreter,mcp]" --verbose -i https://pypi.loongnix.cn/simple
Using pip 25.0.1 from /usr/local/lib/python3.10/site-packages/pip (python 3.10)
Looking in indexes: https://pypi.loongnix.cn/simple
Obtaining file:///opt/app
ERROR: file:///opt/app does not appear to be a Python project: neither 'setup.py' nor 'pyproject.toml' found.

I have to manually download & install the pip libs.