Honestly I don't know much about web mentions. It would be very cool however, if when I add a HN/Reddit/Twitter/Mastodon comment by somebody to a curated feed, that that person could be notified by a web mention. From my limited understanding, though, I think this would require web mentions to be implemented wherever the comment/highlight originated from?

I like to think that I'm pretty technically competent, but I really struggle to understand a lot of the standards/protocols that the fediverse/indieweb is built on...