[ziml77]

Doing it in a way that behaves the way people expect is what requires work. It's easy when both people are online at the same time. It becomes more difficult when you want to ensure asynchronous delivery and receipt and which supports people hopping between devices and not losing the conversation history. I can naively think of a way which would be to make them work identically to normal Bluesky posts except they're encrypted with a public-private keypair, but that would leak who is talking to who and how many DMs people are sending and receiving.