# Deep Agents and OpenCode are now available in the AI SDK Harness

DevFeed: [Deep Agents and OpenCode are now available in the AI SDK Harness](<https://devfeed.tech/articles/deep-agents-and-opencode-are-now-available-in-the-ai-sdk-harness-887.md>)

Original publisher: [Read original article](<https://vercel.com/changelog/deepagents-and-opencode-harness-adapters>)

Author: Felix Arntz

Published: 2026-06-25T00:00:00Z

Content type: release

Language: en

Sources: [Vercel News](<https://devfeed.tech/sources/vercel-news.md>)

Topics: [vercel ai sdk](<https://devfeed.tech/topics/vercel-ai-sdk.md>), [SDKs](<https://devfeed.tech/topics/sdks.md>), [LangChain](<https://devfeed.tech/topics/langchain.md>), [Vercel](<https://devfeed.tech/topics/vercel.md>), [coding](<https://devfeed.tech/topics/coding.md>)

Tags: [agent](<https://devfeed.tech/tags/agent.md>), [ai](<https://devfeed.tech/tags/ai.md>), [claude](<https://devfeed.tech/tags/claude.md>), [codex](<https://devfeed.tech/tags/codex.md>), [langchain](<https://devfeed.tech/tags/langchain.md>), [model](<https://devfeed.tech/tags/model.md>), [opencode](<https://devfeed.tech/tags/opencode.md>), [reasoning](<https://devfeed.tech/tags/reasoning.md>), [sandbox](<https://devfeed.tech/tags/sandbox.md>), [sdk](<https://devfeed.tech/tags/sdk.md>), [skills](<https://devfeed.tech/tags/skills.md>), [tools](<https://devfeed.tech/tags/tools.md>), [vercel](<https://devfeed.tech/tags/vercel.md>)

## AI overview

Vercel's AI SDK Harness now supports Deep Agents and OpenCode through new adapters running in a Vercel Sandbox. The unified interface allows applications to switch between coding-agent runtimes without changing application code, while supporting tools, sessions, approvals, model selection, and streamed events.

## Source excerpt

The AI SDK Harness lets you run established coding-agent runtimes through one unified interface, so you can switch runtimes without changing your application code. Today we're adding two new adapters, Deep Agents and OpenCode, both running inside a Vercel Sandbox. Deep Agents @ai-sdk/harness-deepagents adapts LangChain's deepagents runtime, with built-in file and shell tools, skills, host tools, multi-turn sessions, attach and resume, and built-in tool approvals. Read the Deep Agents harness documentation to get started. OpenCode @ai-sdk/harness-opencode boots a real OpenCode server inside the sandbox via @opencode-ai/sdk and streams its session events through the harness. It exposes OpenCode's built-in tools, supports both built-in and host tool approvals, and lets you pick the model, provider, and reasoning variant. Read the OpenCode harness documentation to get started. The full supported list of harnesses is now: Claude Code, Codex, Deep Agents, OpenCode, Pi, with more coming soon. Read more