Use ACP-compatible harnesses with the AI SDK harness layer

UpdateAug 13, 2026VerifiedAdded Sep 22, 2026

The AI SDK harness layer now supports any Agent Client Protocol (ACP)-compatible harness with HarnessAgent through the new @ai-sdk/harness-acp package. Previously, every harness adapter wrapped one specific runtime (Claude Code, Codex, Pi, Deep Agents, OpenCode). @ai-sdk/harness-acp wraps the protocol instead.

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Read Vercel's release notes

https://vercel.com/changelog/use-acp-compatible-harnesses-with-the-ai-sdk-harness-layer

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