Title, description and id are now correctly fetched over ActivityPub. But the library we are using is a mess, and the code is extremely ugly. Also our database and logic needs a good number of changes to deal with federation (like we cant use simple numeric IDs).
Okay so I’m more thinking of the URLs that are visible to the user, not of ActivityPub. Still need to get more familiar with that.
For user-visible URLs, keep in mind that having plaintext names (so something like
https://lemmy.ml/c/community@communism.lemmy.ml
) is good for both human readability and search engine optimization.