Platform WatchJune 25, 2026via Vercel Blog
Deep Agents and OpenCode are now available in the AI SDK Harness
Why it matters
Vercel's AI SDK Harness is reducing developer friction by abstracting away coding-agent runtime differences—letting teams experiment with multiple agent providers (Claude, Deep Agents, OpenCode) through a single interface. This matters for AI application builders choosing between fragmented agent ecosystems.
Key signals
- Vercel AI SDK Harness now supports 5 coding-agent runtimes: Claude Code, Codex, Deep Agents, OpenCode, Pi
- Deep Agents adapter includes file/shell tools, multi-turn sessions, attach/resume, tool approvals
- OpenCode adapter boots real server inside Vercel Sandbox, streams session events, supports model/provider/reasoning selection
- Published June 25, 2026
- Full backward compatibility—switch runtimes without changing application code
The hook
Vercel just unified 5 coding-agent runtimes under one SDK. Switch between Claude Code, Deep Agents, and OpenCode without rewriting a line.
The 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
adapts LangChain's runtime, with built-in file and shell tools, skills, host tools, multi-turn sessions, attach and resume, and built-in tool approvals.@ai-sdk/harness-deepagentsdeepagents
Read the to get started.Deep Agents harness documentation
boots a real OpenCode server inside the sandbox via 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.@ai-sdk/harness-opencode@opencode-ai/sdk
Read the to get started.OpenCode harness documentation
The full supported list of harnesses is now: Claude Code, Codex, Deep Agents, OpenCode, Pi, with more coming soon.
Deep Agents
OpenCode