Advice for anybody starting a new Fediverse thing: The only real requirement in ActivityPub is that the content type is either application/activity+json or application/ld+json; profile="https://www.w3.org/ns/activitystreams". A lot of people have implemented this.

I think describing this as hazing against new projects might be appropriate.

@helge it's funny how even the one consistent requirement we have is still not a clear-cut requirement, but instead a choice between two options that someone didn't make for us.