If you were to design an open social networking protocol, what would that look like? Which metaphors and comparisons would you use to get a general idea of how the network functions? What would you answer if people ask if your network is decentralised and federated?
This article is not a deep technical explanation about how either ActivityPub or ATProto work. Instead I want to explain to you have these two protocols have different conceptual models of what an open social network looks like. These conceptual models differ much more from each other than people expect, leading people to apply