The app repo is the live beta app, but is undergoing a rewrite, so we warn about deprecation so people don't build on it. The new version will be ready next month. The invite code is because we are the only ones running a homeserver right now, and because it is a beta. Most importantly, all of the protocol is already open source, The parts you want to pay special attention to are the PKDNS/PKARR aspect, and how we are applying an open "semantic social graph." I'm happy to explain more, generally, it's more like Bluesky than Nostr, but distinct in various ways, including the two mentioned here. Pubky isn't just a social media app, it is part of a larger design to build out a free market society.<｜begin▁of▁sentence｜>