git:20260518.642238b to git:20260518.3fa5bdc

11 added, 10 removed. Audit A to A.

---

name: "act Local GitHub Actions Runner"

slug: "act-local-github-actions-runner"

description: "act is an open-source CLI tool that runs GitHub Actions workflows locally using Docker, enabling fast feedback on workflow changes without pushing to GitHub. With 57,000+ stars on GitHub, it is the standard tool for local Actions development and testing."

github_stars: 69661

verification: "security_reviewed"

source: "https://github.com/nektos/act"

category: "CI/CD Integrations"

framework: "Claude Code"

tool_ecosystem:

github_repo: "nektos/act"

github_stars: 69661

---

# act Local GitHub Actions Runner

act is an open-source CLI tool that runs GitHub Actions workflows locally using Docker, enabling fast feedback on workflow changes without pushing to GitHub. With 57,000+ stars on GitHub, it is the standard tool for local Actions development and testing.

## Installation

Use the upstream install or setup path that matches your environment:

- - Install Docker first. act depends on the Docker Engine API for container-backed workflow runs.

- - On macOS or Linux with Homebrew, install act with: `brew install act`

- - To build from source: `git clone https://github.com/nektos/act.git && cd act && make build`

- - Run workflows locally from a repository with GitHub Actions configured: `act`

+ - If you are using macOS, please be sure to follow the steps outlined in Docker Docs for how to install Docker Desktop for Mac .

+ - If you are using Linux, you will need to install Docker Engine .

+ - git clone https://github.com/nektos/act.git

+ - make build

Requirements and caveats from upstream:

- - Docker Desktop is the documented Docker path for macOS and Windows.

- - Linux users need Docker Engine when running container-backed jobs.

- - act is not officially supported with podman or other container backends.

+ - 4.2. Docker context

+ - Necessary prerequisites for running act

+ - act depends on docker (exactly Docker Engine API) to run workflows in containers. As long you don't require container isolation, you can run selected (e.g. windows or macOS) jobs directly on your System, see Runners ....

Basic usage or getting-started notes:

- - Run `act` from a repository root to read workflows from `.github/workflows/`.

- - Use act for fast local feedback before pushing workflow changes to GitHub.

+ - Introduction

+ - Installation

+ - 2.1. Arch

- Source: https://github.com/nektos/act

- - Extracted from upstream docs: https://nektosact.com/installation/index.html and https://nektosact.com/usage/index.html

+ - Extracted from upstream docs: https://nektosact.com/installation/index.html

## Source

- [Agent Skill Exchange](https://agentskillexchange.com/skills/act-local-github-actions-runner/)