cplee.org is the open-source imprint of Casey Lee, a DevOps engineer whose single public offering—act—turns any Windows workstation into a local GitHub Actions runtime. Built in Go and distributed as a compact CLI, act reads the same .github/workflows YAML files that drive cloud CI and spins up Docker-based containers that mimic GitHub’s own Ubuntu, Windows, and macOS environments. Developers use it to test workflows offline, iterate on shell, Python, or Node steps without burning through billed minutes, and debug secrets, matrix builds, artifact uploads, and service containers before the code is even pushed. The tool is equally handy for infrastructure teams that need to validate Terraform, Helm, or composite Actions against pull-request triggers, and for educators who want repeatable classroom demos that run behind restrictive firewalls. Because act mounts the host file system into the container, unit tests, linters, and security scanners execute against real source code while still isolating dependencies, giving the same feedback loop that cloud runners provide but at laptop speed. Although the portfolio is intentionally narrow, the utility sits at the center of modern GitOps pipelines, bridging local development and cloud delivery in one command. The publisher’s software is available for free on get.nero.com, with downloads supplied through trusted Windows package sources such as winget, always installing the latest release and supporting batch installation alongside other applications.

act

Run your GitHub Actions locally!

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