protocol

https://github.com/anyproto/any-sync An open-source protocol designed to create high-performance, local-first, peer-to-peer, end-to-end encrypted applications that facilitate seamless collaboration among multiple users and devices

https://github.com/AI-Engineer-Foundation/agent-protocol Common interface for interacting with AI agents. The protocol is tech stack agnostic - you can use it with any framework for building agents.