mise

What mise is

mise is a free, open-source development environment setup tool for Linux, macOS, and Windows. A project's `mise.toml` can declare development tools, environment variables, and tasks; global configuration can hold personal defaults. mise installs tools and selects versions per project, with support for hundreds of tools. It can manage project environment variables and automatically activate Python virtual environments when entering projects. Teams can share project tasks and run them when files change. Shell activation is documented for bash, zsh, fish, nushell, PowerShell, and others, and the documentation covers IDE integration plus CI examples for GitHub Actions, GitLab CI, and Xcode Cloud. Safe mode can block project configuration from executing code or injecting environment variables in supported operations. However, some backends require code execution and cannot resolve versions in safe mode. The project also advises reviewing configuration from others because tasks, hooks, and some environment directives can execute code. mise is MIT licensed.