# Vercel AI SDK 7 adds HarnessAgent for coding-agent harnesses

> Source: <https://runtimewire.com/article/vercel-ai-sdk-7-adds-harnessagent-for-coding-agent-harnesses>
> Published: 2026-06-12 20:53:48+00:00

Vercel Developers (@vercel dev) said Friday that Vercel's AI SDK now supports agent harnesses for Claude Code, Codex and the Pi harness, with sandboxed sessions and SDK compatible streams, in a post on X. Vercel detailed the release in a changelog post, saying AI SDK 7 introduces HarnessAgent , an experimental canary API meant to give developers one programming model for running established coding agent harnesses. https://x.com/vercel dev/status/2065509970775519569 The move pushes the AI SDK ...