Link
Hocuspocus protocol
The wire format the server speaks — eight message types over one socket.
Hocuspocus protocol
The wire protocol the server speaks: eight binary message types over one WebSocket, carrying document sync, awareness, and authentication.
Useful to know it exists for one practical reason — it is a published format with more than one implementation, so the documents behind this site are not locked to the server that happens to be serving them. Storage you can move is the difference between "your data" as a slogan and as a fact.