Deep Agents and OpenCode are now available in the AI SDK Harness
Vercel just unified 5 coding-agent runtimes under one SDK. Switch between Claude Code, Deep Agents, and OpenCode without rewriting a line.
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.
The key facts
5 to knowVercel 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
Go to the source
Vercel Blogvercel.com
Publisher excerpt: 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…