Yeah, at the moment it's a script that calls the mastodon api to add a git-ops derived block list. Hachyderm has one too. It's a neat idea (philosophical questions not withstanding).
I think the easiest approach would be to download the code locally and have it run against your Mastodon instance and that would allow folks to choose to use it if they want or not, but not bake it into the default app.
But I may have read the instructions wrong!