I personally implemented my PROMPT generation's git commit and branch checks using zsh (just shell scripting) because compiling and dealing with a divergent version of my shell is just too much of a pain given how many machines I have to deal with.
That would have been the easy way to do it, if tcsh allowed dynamically generated prompts (outside of a few stock flags). On Freebsd it makes sense to run your own packaging build server once you start running custom compiles on more than a few machines, so it is no big deal to compile once and `pkg install` everywhere you want it. I guess the downside of that is that it makes it easy to be lazy and not push upstream, which I'm pretty sure is the primary motivation for a lot of code contributions :)
