AI BriefingVercel Adds Support for Lightweight Coding Agent 'fx' to AI SDK Harness Layer
Key point
Vercel has officially added support for the lightweight coding agent fx to its AI SDK harness layer, enabling integration via the ACP protocol.
Details
Vercel's AI SDK harness layer now officially supports the lightweight open-source coding agent fx. The harness layer provides a single API for running coding agents within applications, allowing fx to be easily added without separate integration work.
Integration Method and Protocol
Developers can configure a HarnessAgent using the official adapter @ai-sdk/harness-fx. This adapter connects to fx via the Agent Client Protocol (ACP), which operates based on @ai-sdk/harness-acp.
Expanded Supported Agents
With this update, fx joins the list of supported harnesses alongside Claude Code, Cline, Codex, Cursor, Deep Agents, Grok Build, OpenCode, Pi, and others.
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