Cline is now available in the AI SDK harness layer

The AI SDK harness layer lets you run established coding-agent runtimes through one unified interface, so you can switch runtimes without changing your application code. Today we are adding Cline, which runs through the same HarnessAgent interface as other supported harness.

@ai-sdk/harness-cline is the official harness adapter for Cline, implemented in collaboration with the Cline team.

Cline runs fully in the host process and uses the sandbox as a remote filesystem and shell, so only its tools operate in the sandbox. No bridge process is installed inside the sandbox, similar to the existing Pi harness.

Read the Cline harness documentation to get started.

The full supported list of harnesses is now: Claude Code, Cline, Codex, Deep Agents, Grok Build, OpenCode, and Pi, with more coming soon.

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