# fx is now available in the AI SDK harness layer

> Source: <https://vercel.com/changelog/fx-ai-sdk-harness-adapter>
> Published: 2026-08-31 06:00:00+00:00

The [AI SDK harness layer](https://vercel.com/changelog/program-agent-harnesses-with-ai-sdk) now supports [fx](https://fx.sh), 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:

The `@ai-sdk/harness-fx`

adapter connects to fx over the Agent Client Protocol (ACP) using [ @ai-sdk/harness-acp](https://vercel.com/changelog/use-acp-compatible-harnesses-with-the-ai-sdk-harness-layer).

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](https://ai-sdk.dev/v7/providers/ai-sdk-harnesses/fx) to get started.