fx is now available in the AI SDK harness layer
Mirrored from Vercel — AI for archival readability. Support the source by reading on the original site.
The AI SDK harness layer now supports fx, Vercel's lightweight, open-source coding agent. The harness layer provides one API for running coding agents in your application, so you can add fx without building a separate integration.
Configure HarnessAgent with the official @ai-sdk/harness-fx adapter:
import { HarnessAgent } from '@ai-sdk/harness/agent';import { fx } from '@ai-sdk/harness-fx';
const agent = new HarnessAgent({ harness: fx,Run fx through the HarnessAgent interface.
The @ai-sdk/harness-fx adapter connects to fx over the Agent Client Protocol (ACP) using @ai-sdk/harness-acp.
fx joins Claude Code, Cline, Codex, Cursor, Deep Agents, Grok Build, OpenCode, and Pi in the list of supported harnesses.
Read the fx harness documentation to get started.
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