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Mise Dev Tools Manager

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Manage dev tools, runtime versions, environment variables, and tasks with mise. Universal tool version manager supporting 1000+ tools with task runner and env management.

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SKILL.md

name Mise Dev Tools Manager
description Manage dev tools, runtime versions, environment variables, and tasks with mise. Universal tool version manager supporting 1000+ tools with task runner and env management.

Overview

Mise is a polyglot tool version manager and task runner that replaces tools like asdf, nvm, pyenv, rbenv, and more. It manages development tool versions, environment variables, and project tasks—all from a single fast CLI with support for 1000+ tools.

Key Features

  • Universal tool management: One tool to manage Node.js, Python, Ruby, Go, Java, and 1000+ others
  • Lightning fast: Written in Rust, up to 2-3x faster than asdf
  • Environment management: Project-specific environment variables
  • Task runner: Built-in task runner (like make/npm scripts but better)
  • Compatible: Works with asdf plugins and .tool-versions files
  • Cross-platform: Works on Linux, macOS, and Windows

Installation

Quick Install

# Linux/macOS
curl https://mise.run | sh

# macOS (Homebrew)
brew install mise

# Cargo
cargo install mise

# Verify installation
mise --version

Shell Setup

After installation, add mise to your shell:

# Bash
echo 'eval "$(mise activate bash)"' >> ~/.bashrc

# Zsh
echo 'eval "$(mise activate zsh)"' >> ~/.zshrc

# Fish
echo 'mise activate fish | source' >> ~/.config/fish/config.fish

# Restart shell or source the config
source ~/.bashrc  # or ~/.zshrc, etc.

Quick Start

Install a tool

# Install Node.js
mise install node@20

# Install Python
mise install python@3.12

# Install latest version
mise install node@latest

Set project versions

# Set local (project) version
mise use node@20
mise use python@3.12

# Set global (system) version
mise use -g node@20

Run a task

# List available tasks
mise tasks

# Run a task
mise run test
mise run build

Tool Management

Installing Tools

# Install specific version
mise install node@20.11.0
mise install python@3.12.1

# Install latest version
mise install node@latest
mise install python@latest

# Install from .mise.toml or .tool-versions
mise install

# List available versions
mise ls-remote node
mise ls-remote python

Using Tools

# Set for current project (creates/updates .mise.toml)
mise use node@20
mise use python@3.12
mise use terraform@1.6

# Set globally for all projects
mise use -g node@20

# Set and pin to exact version
mise use node@20.11.0

# Set multiple tools at once
mise use node@20 python@3.12

Listing Tools

# List installed tools for current project
mise list
mise ls

# List all installed tools globally
mise list --global

# List available tools
mise plugins ls-remote

# Check what tools are available
mise registry

Updating Tools

# Update to latest version
mise upgrade node
mise upgrade python

# Update all tools
mise upgrade

# Update mise itself
mise self-update

Removing Tools

# Uninstall a version
mise uninstall node@18

# Remove from current project
mise rm node

Configuration Files

.mise.toml (Recommended)

Create a .mise.toml in your project root:

[tools]
node = "20"
python = "3.12"
terraform = "1.6"
go = "1.22"

[env]
DATABASE_URL = "postgres://localhost/mydb"
API_KEY = "dev-key-123"
NODE_ENV = "development"

[tasks.test]
run = "pytest tests/"
description = "Run Python tests"

[tasks.lint]
run = ["eslint .", "black --check ."]
description = "Run linters"

[tasks.dev]
run = "npm run dev"
description = "Start development server"

.tool-versions (Legacy)

Compatible with asdf format:

node 20.11.0
python 3.12.1
terraform 1.6.0

Version Syntax

[tools]
node = "20"           # Latest 20.x
node = "20.11"        # Latest 20.11.x
node = "20.11.0"      # Exact version
node = "latest"       # Latest stable
python = "3.12"       # Latest 3.12.x

Environment Variables

Setting Variables

# In .mise.toml
[env]
DATABASE_URL = "postgres://localhost/mydb"
API_KEY = { file = ".env.local" }  # Load from file
PATH = ["./node_modules/.bin", "$PATH"]  # Prepend to PATH

Using Templates

[env]
PROJECT_ROOT = "{{ cwd }}"
CONFIG_PATH = "{{ config_root }}/config"
HOME_DIR = "{{ env.HOME }}"

Per-Environment Config

# Load different configs based on MISE_ENV
mise use --env production node@20
mise use --env development node@18

# Set environment
export MISE_ENV=production

Task Runner

Defining Tasks

# Simple task
[tasks.test]
run = "pytest tests/"

# Task with options
[tasks.build]
run = "npm run build"
description = "Build for production"
depends = ["lint", "test"]

# Multiple commands
[tasks.deploy]
run = [
  "npm run build",
  "aws s3 sync dist/ s3://my-bucket",
  "aws cloudfront create-invalidation --distribution-id XXX --paths '/*'"
]

# Task with arguments
[tasks.db-migrate]
run = "python manage.py migrate {{ arg(name='env', default='dev') }}"

# Task with environment variables
[tasks.test-e2e]
run = "playwright test"
env = { CI = "true", HEADLESS = "true" }

Running Tasks

# Run a task
mise run test
mise run build

# Run with arguments
mise run db-migrate -- production

# List all tasks
mise tasks
mise tasks --json

# Run multiple tasks
mise run lint test build

# Run task from specific config
mise run -C /path/to/project test

Task Dependencies

[tasks.deploy]
run = "kubectl apply -f k8s/"
depends = ["test", "build"]

[tasks.test]
run = "pytest tests/"

[tasks.build]
run = "docker build -t myapp ."

When you run mise run deploy, it will run test and build first.

Watching for Changes

[tasks.dev]
run = "npm run dev"
sources = ["src/**/*.ts", "package.json"]
outputs = ["dist/**/*"]

Mise will track changes and only run when sources change.

Common Workflows

1. Starting a New Project

# Initialize project with tools
cd my-project
mise use node@20 python@3.12

# This creates .mise.toml:
# [tools]
# node = "20"
# python = "3.12"

# Install the tools
mise install

# Verify
mise list
node --version
python --version

2. Cloning an Existing Project

# Clone project
git clone https://github.com/example/project
cd project

# Install all tools from .mise.toml
mise install

# Run project setup
mise run setup

3. Adding Environment Variables

# Edit .mise.toml
[env]
DATABASE_URL = "postgres://localhost/mydb"
REDIS_URL = "redis://localhost:6379"
API_KEY = "dev-key-123"

# Variables are automatically loaded when you cd into the directory
cd my-project
echo $DATABASE_URL  # postgres://localhost/mydb

4. Setting Up Tasks

# .mise.toml
[tasks.setup]
run = [
  "npm install",
  "python -m pip install -r requirements.txt",
  "cp .env.example .env"
]
description = "Setup project dependencies"

[tasks.dev]
run = "npm run dev"
description = "Start development server"

[tasks.test]
run = ["npm test", "pytest tests/"]
description = "Run all tests"

[tasks.format]
run = ["prettier --write .", "black ."]
description = "Format code"

# Use the tasks
mise run setup
mise run dev
mise run test

5. Managing Multiple Node.js Versions

# Install multiple versions
mise install node@18 node@20 node@21

# Set different versions per project
cd project-a && mise use node@18
cd project-b && mise use node@20

# Use temporary version for a command
mise exec node@21 -- node script.js

6. Language-Specific Package Managers

# Install language package managers
mise install node@20        # Includes npm
mise install python@3.12    # Includes pip
mise install ruby@3.3       # Includes gem

# They're automatically available
npm install
pip install requests
gem install rails

Advanced Features

Trust Configuration

Mise prompts before loading new configs for security:

# Trust a config
mise trust

# Trust and install
mise install

# Auto-trust all configs (use with caution)
mise settings set trusted_config_paths "~/.config/mise"

Global Configuration

Edit ~/.config/mise/config.toml:

[settings]
experimental = true
verbose = true

[tools]
node = "20"
python = "3.12"

[env]
EDITOR = "vim"

Using Profiles

# Set up profiles
mise use --profile work node@20
mise use --profile personal node@18

# Switch profiles
export MISE_PROFILE=work

Cache Management

# Clear plugin cache
mise cache clear

# Show cache location
mise cache show

# Clean old versions
mise prune

Hook Scripts

# Run scripts on certain events
[hooks]
enter = "echo 'Entering project'"
leave = "echo 'Leaving project'"

Integration with CI/CD

GitHub Actions

name: CI
on: [push]

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: jdx/mise-action@v2
        with:
          version: latest

      - run: mise install

      - run: mise run test
      - run: mise run build

Docker

FROM ubuntu:22.04

# Install mise
RUN curl https://mise.run | sh
ENV PATH="/root/.local/bin:$PATH"

# Copy config
COPY .mise.toml .
RUN mise install

# Run tasks
CMD ["mise", "run", "start"]

GitLab CI

image: ubuntu:22.04

before_script:
  - curl https://mise.run | sh
  - export PATH="$HOME/.local/bin:$PATH"
  - mise install

test:
  script:
    - mise run test

Best Practices

1. Commit Configuration

Always commit .mise.toml or .tool-versions:

git add .mise.toml
git commit -m "Add mise configuration"

This ensures all team members use the same tool versions.

2. Pin Versions in Production

# Development: Use ranges for flexibility
[tools]
node = "20"

# Production: Pin exact versions
[tools]
node = "20.11.0"
python = "3.12.1"

3. Use Tasks for Common Commands

Instead of documenting commands in README, define tasks:

[tasks.setup]
run = "npm install && python -m pip install -r requirements.txt"
description = "Install all dependencies"

[tasks.dev]
run = "npm run dev"
description = "Start dev server"

Team members just run mise tasks to see available commands.

4. Keep Environment Variables Secure

# Don't commit secrets directly
[env]
API_KEY = { file = ".env.local" }  # Load from gitignored file

# Or use templates
DATABASE_URL = "{{ env.DATABASE_URL }}"

5. Use Descriptions

[tasks.test]
run = "pytest tests/"
description = "Run test suite with pytest"  # Helps others understand

[tasks.deploy]
run = "./deploy.sh"
description = "Deploy to production (requires AWS credentials)"

6. Leverage Task Dependencies

[tasks.ci]
depends = ["lint", "test", "build"]
description = "Run full CI pipeline"

# Now `mise run ci` runs everything in order

Troubleshooting

Tool Not Found

# Ensure mise is activated in shell
eval "$(mise activate bash)"

# Reshim after installation
mise reshim

# Check if tool is installed
mise list

Version Mismatch

# Check current versions
mise current

# Verify config
cat .mise.toml

# Reinstall
mise install --force

Slow Performance

# Disable telemetry
mise settings set disable_telemetry true

# Reduce checks
mise settings set jobs 4

Plugin Issues

# Update plugins
mise plugins update

# Reinstall plugin
mise plugins uninstall node
mise plugins install node

Comparison with Other Tools

Feature Mise asdf nvm pyenv
Speed Fast Slow Medium Medium
Language Rust Shell Shell Shell
Task Runner Yes No No No
Env Vars Yes No No No
Tools Supported 1000+ 1000+ 1 (Node) 1 (Python)
Windows Support Yes No No Limited

Tips for AI Agents

1. Always Check for Config First

# Before suggesting tool installation, check for config
if [ -f .mise.toml ] || [ -f .tool-versions ]; then
  mise install
else
  # Suggest creating config
  mise use node@20
fi

2. Use JSON Output

# Get parseable output
mise list --json
mise tasks --json
mise ls-remote node --json

3. Detect Tool Versions

# Check what's needed
mise current

# Install missing tools
mise install

4. Suggest Tasks Over Commands

Instead of:

npm run build && npm run test && npm run deploy

Suggest:

# Add to .mise.toml
[tasks.release]
run = ["npm run build", "npm run test", "npm run deploy"]

# Run
mise run release

5. Recommend mise for New Projects

When a user starts a new project:

# Set up tools
mise use node@20 python@3.12

# Add common tasks
[tasks.setup]
run = "npm install"
description = "Install dependencies"

Resources

Summary

Mise is a modern, fast, all-in-one development tool manager that:

  • Replaces multiple tools: nvm, pyenv, rbenv, asdf, etc. with one fast binary
  • Manages 1000+ tools: Node.js, Python, Ruby, Go, Terraform, kubectl, and more
  • Handles environment variables: Project-specific env vars that auto-load
  • Runs tasks: Like make/npm scripts but with dependencies and better features
  • Works everywhere: Linux, macOS, Windows with consistent behavior
  • Fast and reliable: Written in Rust, 2-3x faster than alternatives

Perfect for teams that want consistent development environments across projects and developers, especially when working with multiple languages and tools.