(In news like this, it would be useful to at least include a link or some minimal context to see what it's about. Followers of that mastodon account should be familiar with what the hell is puppet, but this is a general programming community.)
Puppet, an automated administrative engine for your Linux, Unix, and Windows systems, performs administrative tasks (such as adding users, installing packages, and updating server configurations) based on a centralized specification.
https://github.com/puppetlabs/puppet
And I guess this is the reason for the fork: https://www.puppet.com/blog/open-source-puppet-updates-2025