Summary
On August 18, 2026, Vercel made Cline available in the AI SDK harness layer via the @ai-sdk/harness-cline adapter, built with the Cline team, letting developers drive the Cline coding agent through the SDK's standard HarnessAgent interface.
What changed
Vercel shipped @ai-sdk/harness-cline, adding the Cline coding agent to the AI SDK harness layer and exposing it through the HarnessAgent interface.
Why it matters
The harness layer standardizes how terminal and coding agents are invoked from the AI SDK; adding Cline broadens the roster of interchangeable agents developers can orchestrate behind one interface, reducing lock-in to any single agent.
Evidence excerpt
Cline is now available in the AI SDK harness layer through the @ai-sdk/harness-cline adapter