It will be open source, end to end encrypted using Signal’s double ratchet encryption protocol, and he plans to make it easy for fediverse platforms to integrate it. The beta will release later this month.
He’s also the creator of https://fedidb.org btw
AP isn’t really meant for real-time communication
Also, e2e means why federate communications… no one except those in the chat can see what’s being said. AP feels like the wrong tool for this job.
I think AP will just be used as account authentication/creation with Signal software as the backend, but this is speculation.