I'm a bit confused. I would characterize this as documentation which can't really be "tried out". From the rules:
> For example, blog posts, sign-up pages, and fundraisers can't be tried out, so they don't count as Show HNs.
It's hosted on Github but I don't think that in and of itself should put it in the Show HN category. Do you think it belongs in Show HN because it's self promotional?
I had posted stuff in the past that got to the front page and it was pretty much the same sort of thing - hosted on GitHub, forkable, starrable. I don't see what the rule is behind not being able to prefix something you made that you want to show HN as a Show HN. Oh well.
Because otherwise the category would be too broad to be interesting. You and I just made comments but they're obviously not 'Show HN'. It has to be something people can try that has (figurative) moving parts.
https://news.ycombinator.com/showhn.html