Session brief
Building an ACP-Compatible Agent Live — Bennet Fenner, Zed
Overview
This talk introduces the Agent Client Protocol (ACP), a JSON RPC-based standard designed to unify interactions between AI coding agents and their clients. The core idea is to provide a consistent interface, similar to Language Server Protocol (LSP), allowing users to bring their preferred AI agent to various development tools. The presentation demonstrates how to build a minimal ACP-compatible coding agent live, showcasing the protocol's capabilities for tool use, streaming output, and file manipulation.
Who should watch
- AI engineers and developers looking to integrate AI agents into their tools.
- Product managers and builders interested in standardizing agent interactions.
- Developers seeking to understand how to create or adapt agents for ACP compatibility.
- Anyone interested in the underlying mechanisms of AI coding assistants.
Key takeaways
- The Agent Client Protocol (ACP) is an open-source, JSON RPC-based standard for agent-client communication.
- ACP enables a unified interface for various AI agents across different client applications, akin to LSP.
- A minimal ACP agent requires implementing initialization, authentication, session management, and prompting functions.
- Agents can communicate tool calls, their progress, and results back to the client via ACP session updates.
- ACP supports streaming text chunks from the model and handling tool call updates, including file read/write operations.
- Clients can proxy file system operations over ACP, allowing agents to interact with files even if changes are only in the editor buffer.
- The protocol can be extended to support client capabilities like terminal management, enabling agents to execute commands.
- Zed, an AI code editor, uses ACP to integrate multiple AI agents, demonstrating its practical application.
Notable quotes
The idea is basically that agents and clients can talk to each other through a unified interface.
*The agent sends old text, new text, and then Z does the diffing for you.*
Unofficial community note. Prefer the recording for nuance.