# Vercel Use ACP-compatible harnesses with the AI SDK harness layer

- Product: Vercel (https://whatsnew.fyi/product/vercel)
- Vendor: Vercel
- Date: 2026-08-13
- Original notes: https://vercel.com/changelog/use-acp-compatible-harnesses-with-the-ai-sdk-harness-layer
- Permalink: https://whatsnew.fyi/product/vercel/releases/2026-08-13-use-acp-compatible-harnesses-with-the-ai-sdk-harn

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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 sp…

- **added** — AI SDK harness layer now supports Agent Client Protocol (ACP)-compatible harnesses with HarnessAgent through the new @ai-sdk/harness-acp package