Lysand

Lysand is a federated social media project with its own protocol, aiming to be faster, lighter, more configurable and more efficient than its predecessors. It is designed to be easy to use, easy to configure, and easy to moderate. The Lysand protocol is a simple, easy-to-use protocol based on normal JSON objects. 

If you're here, chances are you already know about the Fediverse, a network of federated servers that communicate with each other using a common protocol (ActivityPub). It turns out that if you write a fully compliant ActivityPub server, it's not going to be able to federate with any of the major instances. This is because the base specification is not very useful, as it is missing a lot of features that are necessary for a modern social media platform. 

For example, Mastodon has a feature called "custom emojis", which allows users to upload their own emojis. This is not part of the ActivityPub specification, so if you write a server that is fully compliant with the specification, it won't be able to display custom emojis.

In fact, Mastodon has diverged so much from the base specification that it becomes very difficult to write a server that can federate with it. Some issues caused by this divergence are sometimes not even documented, leading to unexplained errors.

because it needs a simple protocol to fix this mess of protocols, instead of a ever growing jungle of not compatible server softwares.