Mise

Mise

Mise is a polyglot tool version manager and task runner. It manages dev tools, environment variables, and tasks for projects.

Core Concepts

Configuration: mise.toml in project root (or .mise.toml, .config/mise/config.toml). Config is hierarchical - child directories override parent settings.

Tools: Defined in [tools] section. Mise installs and activates correct versions per-directory.

Environment: Defined in [env] section. Set project-specific env vars that activate when entering directory.

Tasks: Defined in [tasks] section or as standalone scripts in mise-tasks/ directory.

Quick Reference

Basic mise.toml structure:

[tools]
node = "22"
python = "3.12"

[env]
NODE_ENV = "development"

[tasks.build]
run = "npm run build"

Essential Commands

| Command | Description | |---------|-------------| | mise use node@22 | Install and set tool version in mise.toml | | mise use -g node@22 | Set global tool version | | mise install | Install all tools from config | | mise run | Run a task | | mise x -- | Execute command with mise environment | | mise ls | List installed tools | | mise doctor | Diagnose mise setup |

Tool Backends

Tools can be installed from various backends:

• Core: node, python, go, ruby (built-in)
• npm: npm:prettier, npm:eslint
• pipx: pipx:black, pipx:ruff
• cargo: cargo:ripgrep
• github: github:BurntSushi/ripgrep
• aqua: aqua:hashicorp/terraform

When to Consult References

For detailed information, read the appropriate reference file:

• Configuration options (tool options, env directives, settings): references/configuration.md
• Task definition (toml tasks, file tasks, arguments, dependencies): references/tasks.md
• CLI commands (all command flags and examples): references/cli.md
• Installable overview (where to look first for all installable options): references/installable-overview.md
• Core tools (built-in first-party languages): references/core-tools.md
• Backends (supported package ecosystems and backend families): references/backends.md
• Registry aliases (tool shorthands accepted by mise use): references/registry-tools.md
• Hooks and advanced features: references/advanced.md

Common Patterns

Project with Node.js and Python

[tools]
node = "lts"
python = "3.12"

[env]
NODE_ENV = "development"
PYTHONDONTWRITEBYTECODE = "1"

[tasks.dev]
run = "npm run dev"

[tasks.test]
run = ["npm test", "pytest"]

Task with Dependencies

[tasks.build]
run = "npm run build"
sources = ["src/**/*.ts"]
outputs = ["dist/**/*.js"]

[tasks.deploy]
depends = ["build", "test"]
run = "./scripts/deploy.sh"

File Task (mise-tasks/build)

#!/usr/bin/env bash
#MISE description="Build the project"
#MISE depends=["lint"]
npm run build

Environment from .env file

[env]
_.file = ".env"
_.path = "./bin"

Shell Activation

Add to shell rc file to auto-activate mise:

# bash: ~/.bashrc
eval "$(mise activate bash)"

# zsh: ~/.zshrc  
eval "$(mise activate zsh)"

# fish: ~/.config/fish/config.fish
mise activate fish | source

Without activation, use mise x -- or mise run .

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: aaronflorey
• Source: aaronflorey/agent-skills
• License: MIT

Install and usage instructions live in the source repository linked above.