HN has a minimal tagging system based on the title:
- Ask HN: https://news.ycombinator.com/ask
- Show HN: https://news.ycombinator.com/show
- etc (some people create their own, like "Tell HN", "Thank HN")
As others have mentioned, there are alternative HN frontends that attempt to do this. I personally would not trust submitter-categorized submissions, especially as more Redditors flee to HN.
I have been thinking about making a classification model for "things that might be posted to Hacker News" and was thinking about training it on