mise
What it is
mise is a free, open-source development environment setup tool for Linux, macOS, and Windows. A project’s mise.toml can declare tools, environment variables, and tasks, while global configuration can hold personal defaults. mise installs development 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. Developers can share tasks and run them when files change. Shell activation is documented for bash, zsh, fish, nushell, PowerShell, and other shells. The documentation covers IDE integration and 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. Some backends require code execution and cannot resolve versions in safe mode. The project advises reviewing other people’s configuration because tasks, hooks, and some environment directives can execute code. The open-source CLI is MIT licensed.
For and against
For
- Supports hundreds of development tools.
- Project configuration can declare tools, variables, and tasks.
- Can automatically activate Python virtual environments.
- Documents integrations for shells, IDEs, and CI systems.
- Free and MIT licensed.
Against
- Some backends cannot resolve versions in safe mode.
- Some configuration directives can execute code.
- The project advises reviewing other people's configuration.
The verdict
mise brings tool-version selection, environment setup, and task running into project configuration. Its safety guidance matters: review configuration from others, and note that safe mode limits some backends.
Who it suits
mise suits developers who want to configure project tools, environment variables, and tasks across Linux, macOS, or Windows. It may also fit teams sharing tasks or developers integrating setup into shells, IDEs, and CI workflows.
Plans and prices
mise (open-source CLI)
MIT licensed · macOS, Linux, Windows
Read 2 Oct 2026 · mise.en.dev
On the record
- CI support
- The CI documentation also includes examples for GitLab CI and Xcode Cloud.mise.en.dev · read 2 Oct 2026
- Configuration
- A project's mise.toml can declare tools, environment variables, and tasks, while global configuration supplies personal defaults.mise.en.dev · read 2 Oct 2026
- Configuration trust
- The getting-started guide advises reviewing other people's configuration because tasks, hooks, and some environment directives can execute code.mise.en.dev · read 2 Oct 2026
- Environments
- It manages project environment variables and can automatically activate Python virtual environments when entering projects.mise.en.dev · read 2 Oct 2026
- Integrations
- The documentation covers IDE integration and provides a GitHub Actions integration through mise-action.mise.en.dev · read 2 Oct 2026
- Maker
- The project says mise was initially created by Jeff Dickey and is developed with contributors.mise.en.dev · read 2 Oct 2026
- Purpose
- mise is a development environment setup tool that uses mise.toml to configure project tools, environments, and commands.mise.en.dev · read 2 Oct 2026
- Security
- The documentation describes safe mode as a way to prevent project configuration from executing code or injecting environment variables in supported operations.mise.en.dev · read 2 Oct 2026
- Security limits
- The documentation says some backends need code execution and cannot resolve versions in safe mode.mise.en.dev · read 2 Oct 2026
- Shell support
- Shell activation is documented for bash, zsh, fish, nushell, PowerShell, and other shells.mise.en.dev · read 2 Oct 2026
- Support
- The project invites questions, bug reports, and suggestions and directs users to its contact guidance.mise.en.dev · read 2 Oct 2026
- Task runner
- It lets developers share project tasks and run tasks when files change.mise.en.dev · read 2 Oct 2026
- Tool management
- It installs development tools and selects versions per project, with support for hundreds of tools.mise.en.dev · read 2 Oct 2026
- Tool registry
- The registry maps short tool names to installation backends, and the documentation says mise can list registered tools with mise registry.mise.en.dev · read 2 Oct 2026
