pypa/pip ? reverse-engineered prompt

Build me a Python package installer that works like pip.

I want a command line tool that can install packages from PyPI and other package indexes, handle dependencies, and manage common install tasks in a way that feels reliable and familiar to Python users. It should include clear user facing help, basic documentation, and a clean way to run tests so the project can be maintained over time.

Please make it work well on the supported Python versions, and keep the code organized so it is easy to understand and extend. If you need to check current packaging behavior or Python docs online, go ahead and do that.

Also include the usual project pieces someone would expect for an open source Python tool, like release notes, contribution friendly structure, and sensible defaults for development and testing.