Cline is now available in the AI SDK harness layer
Source
vercel.com
Author
Felix Arntz
Date
Context
Vercel's Cline adapter gives applications another coding-AI agentAn AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.Full definition → runtime behind the AI SDK's shared HarnessAgent interface. A agent harnessThe scaffolding around a model that turns it into a working agent — the loop, the tools it can call, and the rules for when to stop.Full definition → is the runtime that manages the agent's work; the shared interface lets application code select among supported runtimes without rebuilding that integration. Cline adapter announcement.
The execution boundary is specific: Cline itself runs in the host process, while its tools use a sandboxAn isolated environment where AI-generated code or agent actions run without being able to touch anything real.Full definition → for remote file access and shell commands. No bridge process is installed inside that sandbox. Developers therefore need to distinguish the agent runtime from the environment where its tools operate when reasoning about isolation. Execution model.
Terms in this piece · Glossary
AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
agent harness — The scaffolding around a model that turns it into a working agent — the loop, the tools it can call, and the rules for when to stop.
sandbox — An isolated environment where AI-generated code or agent actions run without being able to touch anything real.
