# fx agent harness now built into T3 Code as a provider

> Original title: fx × T3 Code: our open-source agent harness, fx, is now a built-in provider in T3 Code.

- Source: Vercel Developers
- Published: 2026-10-28T17:10:06.000Z
- Bad Influence: https://badinfluence.news/items/vqrwj7wo06u9y99qts22on92w
- Original: https://x.com/vercel_dev/status/2115491309591167359

## Summary

Vercel says its open-source agent harness fx is now a built-in provider in T3 Code. The harness runs on web, desktop, and mobile, and works with users' existing models and skills.

## Post

fx × T3 Code: our open-source agent harness, fx, is now a built-in provider in T3 Code.

• Runs on web, desktop, and mobile
• Works with your existing models and skills
https://vercel.com/changelog/fx-is-now-available-in-t3-code