@pfefferle Let me look into that. It _should_ be possible, given that Share on Mastodon has API access. Assuming there are a number of ActivityPub action hooks for something like this, are they documented somewhere?
I’m going to have to play with ActivityPub some more … I always wondered, is there a hook, maybe, to allow certain posts to be skipped? Or base the activity type on a post’s post format or post type?