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Deep Agents and OpenCode Added to AI SDK Harness

·2026.06.25 09:00

Key point

Vercel's AI SDK Harness adds Deep Agents and OpenCode adapters, providing unified support for various coding agent runtimes.

Details

Vercel's AI SDK Harness lets you switch between and run various coding agent runtimes through a single unified interface without changing your application code. With this update, Deep Agents and OpenCode adapters have been newly added, and both adapters run within the Vercel Sandbox environment.

The Deep Agents adapter supports LangChain's deepagents runtime and provides the following features:

  • Built-in file and shell tools
  • Multi-turn sessions and session attach and resume
  • Tool approvals

The OpenCode adapter boots an actual OpenCode server inside the sandbox and streams session events. Users can directly select the model, provider, and reasoning variant, and it supports approvals for both built-in and host tools.

The list currently supported by the AI SDK Harness is Claude Code, Codex, Deep Agents, OpenCode, Pi, and more adapters are planned to be added in the future.

vercellangchaincoding-agentopencodeai-sdkdeep-agents
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