# Cursor is now available in the AI SDK harness layer

Source: [Vercel](https://vercel.com/changelog/cursor-ai-sdk-harness-adapter)  
Feed7 permalink: https://feed7.dev/p/cursor-is-now-available-in-the-ai-sdk-harness-layer-f8c22d41c8  
Published: 2026-08-27T00:00:00.000Z  
Trust: Official Source (official_source)

## Why Included

The HarnessAgent interface can reduce application changes when testing or switching among eight coding-agent harnesses.

## Source Summary

Vercel’s AI SDK can now run Cursor behind the same HarnessAgent interface as seven other coding agents, reducing application changes when swapping harnesses.

## Practical Implication

Use HarnessAgent as the application boundary if you expect to test or switch among Cursor, Claude Code, Codex, Cline, Deep Agents, Grok Build, OpenCode, and Pi. That keeps agent selection out of the surrounding application code.

## Agent-Ready Context

The official **@ai-sdk/harness-cursor** adapter adds Cursor to Vercel’s AI SDK harness layer. It connects through **Agent Client Protocol (ACP)** and joins seven other supported coding-agent harnesses.

Use **HarnessAgent** as the application boundary if you expect to test or switch among Cursor, Claude Code, Codex, Cline, Deep Agents, Grok Build, OpenCode, and Pi. That keeps agent selection out of the surrounding application code.

The announcement establishes interface compatibility, but does not compare feature parity, behavior, or portability across harnesses. Agent-specific capabilities may still require separate validation.

## Context Map

- Layer: tools
- Domains: coding
- Topics: agent-sdks, coding-agents, harness-engineering

## Uncertainty

- None recorded.

## Agent Instruction

Use this item as source-backed context. Do not invent claims beyond the linked source. If this item conflicts with another source, call out the conflict.