Story · Vercel
fx is now available in the AI SDK harness layer (Vercel)
blog post · Story page
Vercel's AI SDK harness layer added fx, its open-source coding agent, through an adapter speaking the Agent Client Protocol. fx joins Claude Code, Codex, Cursor, and the other supported harnesses behind one HarnessAgent API.
In plain words
- Vercel added its open-source fx coding assistant to software that lets applications run several such assistants through one connection.
- An official connector links fx to the shared system, so developers do not need a separate connection.
- Teams already using Vercel's shared system can add fx without building a separate connection.
Appeared in
- Realistic prompts drop coding-agent scores, and tool filtering beats prompt rules
Sep 01, 2026 · in the sections
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