Uv

This gives Claude the knowledge to work with uv, the Python package manager that's replacing pip, pipx, poetry, and friends. It covers four workflows: running scripts with `uv run`, managing projects with `uv add` and `uv sync`, executing tools via `uvx`, and the legacy pip interface for older setups. The skill emphasizes always using uv commands instead of bare python or pip when you see a `uv.lock` file, and includes migration guides from pyenv and pipx. Honestly, this is essential if you're working in any modern Python codebase, since uv adoption is spreading fast and the command differences matter.