uv: Python Package & Project Manager uv (v0.11.11, May 2026) replaces pip, pip-tools, pipx, pyenv, virtualenv, and poetry. Written in Rust, 10-100x faster than alternatives. It is stable production software; minor versions can contain breaking changes, while patch releases are intended to be non-breaking. Workflow Decision Tree Critical rule: If exists, use project commands ( , , ). Never in a project, it bypasses the lockfile. Projects Initialization Dependency Management Dependency Groups (PEP 735) Sync & Run Locking Export Scripts (PEP 723) Single-file scripts with inline dependency metada…