Fyn: A Fast Python Package Manager Forked from uv, Written in Rust

Summary

Fyn is a fast Python package manager written in Rust, forked from uv. It aims to replace multiple Python development tools (pip, pip-tools, poetry, virtualenv, etc.) with a single unified tool that offers 10-100x faster performance than pip. Key features include comprehensive project management with a universal lockfile, built-in task runner, virtual environment activation, dependency upgrades, and pyproject.toml workflow support.