Ah, possibly - the way I think about Show HN is it's for links to a codebase or demo app. There is a demo app linked in this article but it's not the link posted to HN. The Guidelines explicitly mention "blog posts" as not Show HN - https://news.ycombinator.com/showhn.html - but they also say that's because they "can't be tried out". Grey area? Happy to do whatever precedent suggests.