It works by exploiting common patterns among GitHub releases across different open-source software such as naming conventions and file layouts to fetch proper release assets for your system and then downloading the proper asset onto your machine via the GitHub API. Parm will then extract the files, find the proper binaries, and then add them to your PATH. Parm can also check for updates and uninstall software, and otherwise manages the entire lifecycle of all software installed by Parm.
Parm is not meant to replace your system's package manager. It is instead meant as an alternative method to install prebuilt software off of GitHub in a more centralized and simpler way.
It's currently in a pre-release stage, and there's a lot of features I want to add. I'm currently working (very slowly) on some new features, so if this sounds interesting to you, check it out! It's completely free and open-source and is currently released for Linux/macOS. I would appreciate any feedback.