§1. This is the home page for documentation and human-readable source code of Intest, a command-line tool for testing other command-line tools.
This page is hosted on the Github Docs area of the Intest repository, at https://github.com/ganelson/intest. Download and build instructions are there, not here.
To get a sense of Intest and what it does, see Manual (in intest).
But if you're here to look under the hood, or you want to fix a bug or add a feature, a good place to begin is How This Program Works (in intest).
§2. Intest is presented as a "web", or "literate program", powered by inweb. Those new to literate programming can find much more information about it there.