Or do I want something other than "threads" there, since I could accept just my comments, rather than the whole comment thread.
I mean, that's more work than I'm going to do for a vanity project, but I could...
You can do it by including your “user” cookie. (You can get that by examining the cookie store via the browser.)
For example, to see all comments containing links to x.com:
https://news.ycombinator.com/from?site=x.com&kind=comment
Or all GitHub links:
https://news.ycombinator.com/from?site=github.com&kind=comme...
Remarkably it matches subdomains too. Here’s all gists posted to HN:
https://news.ycombinator.com/from?site=gist.github.com&kind=...
The submitted url shows all HN links posted to HN (i.e. comments containing news.ycombinator.com):
https://news.ycombinator.com/from?site=news.ycombinator.com&...
Note that this is distinct from showing comments with links to ycombinator.com, which doesn’t show links to HN:
https://news.ycombinator.com/from?site=ycombinator.com&kind=...
I find this impressive, since it’s not merely matching text (otherwise site=ycombinator.com would also show HN links).
You can even set site=github.com/antirez to find comments with links to antirez’s repos:
https://news.ycombinator.com/from?site=github.com/antirez&ki...
site=x.com/paulg doesn’t work though, so apparently site=domain.com/path only works for certain domains.
I just discovered this, and embarrassingly emailed Dan asking whether kind=comment was broken since I didn’t understand what I was looking at. Was this announced somewhere and I missed it?