[dflock]

Your description of the Matrix protocol reminded me of this, currently in development by the Atom/xray team: https://github.com/atom/xray/tree/master/memo_core

> Memo – Real-time collaboration for Git

> On its own, Git can only synchronize changes between clones of a repository after the changes are committed, which forces an asynchronous collaboration workflow. A repository may be replicated across several machines, but the working copies on each of these machines are completely independent of one another.

> Memo's goal is to extend Git to allow a single working copy to be replicated across multiple machines. Memo uses conflict-free replicated data types (CRDTs) to record all uncommitted changes for a working copy, allowing changes to be synchronized in real time across multiple replicas as they are actively edited. Memo also maintains an operation-based record of all changes, augmenting Git's commit graph with the fine-grained edit history behind each commit.

They intend to use this in their WIP xray editor - a possible future replacement for the Atom editor. Meno will be used to provide real-time multi-user collaboration for the editor, like Teletype for Atom: https://teletype.atom.io/

I occurred to me, that if your got repo contained chat history, then your edit would then be a chat client, with your chat history version and stored by git.