I thought it would be good if making a post with a URL alerted me if the same URL has already been posted to another community/ server. Then it could offer to make the body of my post a comment under that post instead.
What do you think, and do any technical people familiar with Lemmy / Piefed / ActivityPub know if suc h a feature is possible without huge overheads?
PieFed has a feature pretty much like that. Once I drop a link into the new post form, it takes a while and loads a table with previous posts. Already helped me when I put in a YouTube like I rediscovered. But I had already posted it 3 months earlier… It’s a very good feature to have. And probably not that difficult to implement.