Example Workflow

name: test
on:
  pull_request:
    branches:
      - main
  push:
    branches:
      - main
jobs:
  lint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
      - uses: jdx/mise-action@v4
        with:
          version: 2026.3.10 # [default: latest] mise version to install
          install: true # [default: true] run `mise install`
          install_args: "bun" # [default: ""] additional arguments to `mise install`
          cache: true # [default: true] cache mise using GitHub's cache
          experimental: true # [default: false] enable experimental features
          log_level: debug # [default: info] log level
          # automatically write this .tool-versions file
          tool_versions: |
            shellcheck 0.11.0
          # or, if you prefer .mise.toml format:
          mise_toml: |
            [tools]
            shellcheck = "0.11.0"
          working_directory: app # [default: .] directory to run mise in
          reshim: false # [default: false] run `mise reshim -f`
          github_token: ${{ secrets.GITHUB_TOKEN }} # [default: ${{ github.token }}] GitHub token for API authentication
      - run: shellcheck scripts/*.sh
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
      - uses: jdx/mise-action@v4
      # .tool-versions will be read from repo root
      - run: node ./my_app.js

Cache Configuration

You can customize the cache key used by the action:

- uses: jdx/mise-action@v4
  with:
    cache_key: "my-custom-cache-key"  # Override the entire cache key
    cache_key_prefix: "mise-v1"       # Or just change the prefix (default: "mise-v0")

Template Variables in Cache Keys

When using cache_key, you can use template variables to reference internal values:

- uses: jdx/mise-action@v4
  with:
    cache_key: "mise-{{platform}}-{{version}}-{{file_hash}}"
    version: "2026.3.10"
    install_args: "node python"

Available template variables:

• {{version}} - The mise version (from the version input)
• {{cache_key_prefix}} - The cache key prefix (from cache_key_prefix input or default)
• {{platform}} - The target platform, including the runner image (e.g., "linux-x64-ubuntu24", "macos-arm64-macos15", "linux-x64-self-hosted"). The trailing segment is process.env.ImageOS on github-hosted runners and falls back to "self-hosted" elsewhere — preventing cache collisions when the same repo runs on different runner providers (github-hosted, namespace.so, self-hosted).
• {{file_hash}} - Hash of all mise configuration files
• {{mise_env}} - The MISE_ENV environment variable value
• {{install_args_hash}} - SHA256 hash of the sorted tools from install args
• {{default}} - The processed default cache key (useful for extending)

Conditional logic is also supported using Handlebars syntax like {{#if version}}...{{/if}}.

Example using multiple variables:

- uses: jdx/mise-action@v4
  with:
    cache_key: "mise-v1-{{platform}}-{{install_args_hash}}-{{file_hash}}"
    install_args: "node@24 python@3.14"

You can also extend the default cache key:

- uses: jdx/mise-action@v4
  with:
    cache_key: "{{default}}-custom-suffix"
    install_args: "node@24 python@3.14"

This gives you full control over cache invalidation based on the specific aspects that matter to your workflow.

Rust Cache

Rust has a known cache interaction because mise installs Rust through rustup. See jdx/mise-action#215.

GitHub API Rate Limits

When installing tools hosted on GitHub (like gh, node, bun, etc.), mise needs to make API calls to GitHub's releases API. Without authentication, these calls are subject to GitHub's rate limit of 60 requests per hour, which can cause installation failures.

- uses: jdx/mise-action@v4
  with:
    github_token: ${{ secrets.GITHUB_TOKEN }}
    # your other configuration

Note: The action automatically uses ${{ github.token }} as the default, so in most cases you don't need to explicitly provide it. However, if you encounter rate limit errors, make sure the token is being passed correctly.

Lock Files

If a repo mise lock file such as mise.lock is present in the working directory or one of its parents, this action automatically runs mise install --locked. You can still pass install_args; --locked will be added automatically unless you already included it yourself.

This auto-detection is intended for repo-managed config files. If you provide mise_toml or tool_versions inputs, the action does not automatically force locked mode.

Alternative Installation

Alternatively, mise is easy to use in GitHub Actions even without this:

jobs:
  build:
    steps:
    - run: |
        curl https://mise.run | sh
        echo "$HOME/.local/share/mise/bin" >> $GITHUB_PATH
        echo "$HOME/.local/share/mise/shims" >> $GITHUB_PATH