Deep Agents and OpenCode are now available in the AI SDK Harness
By Steven Van ·
Vercel's AI SDK Harness adds Deep Agents and OpenCode adapters, both running inside a Vercel Sandbox.
Two new adapters have joined the AI SDK Harness in Vercel's AI SDK, letting developers run additional coding-agent runtimes through the same unified interface without changing application code. Both new adapters run 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 developers pick the model, provider, and reasoning variant.
The full list of supported harnesses is now Claude Code, Codex, Deep Agents, OpenCode, and Pi, with more planned.
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