microsoft/agent-host-protocol

Synchronized multi-client state for AI agent sessions

What it solves

It provides a standardized way for multiple clients to connect to a standalone sessions server and maintain a synchronized view of AI agent sessions. This ensures that different interfaces or tools can interact with the same agent state consistently across different platforms.

How it works

The protocol uses a combination of immutable state, pure reducers, and write-ahead reconciliation to synchronize state between a portable sessions server and its connected clients. It includes client libraries for several languages including Rust, TypeScript, Kotlin, Go, Swift, and .NET to facilitate integration.

Who it’s for

Developers building AI agent ecosystems where multiple clients (such as IDEs or CLI tools) need to access and synchronize the state of agent sessions.

Highlights

  • Multi-client synchronization for AI agent sessions.
  • Support for a wide range of programming languages via official SDKs.
  • Reference server implementation available within VS Code.
  • Capability to connect to multiple hosts simultaneously via MultiHostClient.

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