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

Vercel's AI SDK Harness now supports Deep Agents and OpenCode, allowing developers to run multiple coding-agent runtimes through a unified interface without changing application code. The new adapters run inside a Vercel Sandbox, joining existing harnesses like Claude Code and Codex.

The AI SDK Harness https://vercel.com/changelog/program-agent-harnesses-with-ai-sdk 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. @ai-sdk/harness-deepagents https://ai-sdk.dev/providers/ai-sdk-harnesses/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 https://ai-sdk.dev/v7/providers/ai-sdk-harnesses/deepagents to get started. @ai-sdk/harness-opencode https://ai-sdk.dev/providers/ai-sdk-harnesses/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 https://ai-sdk.dev/v7/providers/ai-sdk-harnesses/opencode to get started. The full supported list of harnesses is now: Claude Code, Codex, Deep Agents, OpenCode, Pi, with more coming soon.