![An illustration of two octocats repairing a robot.](https://github.blog/wp-content/themes/github-2021/assets/img/fallbacks/archive-hero-1.png)
octocatalog-diff: GitHub’s Puppet development and testing tool
Today we are announcing the open source release of octocatalog-diff: GitHub’s Puppet development and testing tool. GitHub uses Puppet to configure the infrastructure that powers GitHub.com, comprised of hundreds of…
![An illustration of two octocats repairing a robot.](https://github.blog/wp-content/themes/github-2021/assets/img/fallbacks/archive-hero-1.png)