# Cline is now available in the AI SDK harness layer

**Published:** August 18, 2026 | **Authors:** Felix Arntz

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The [AI SDK harness layer](https://vercel.com/changelog/program-agent-harnesses-with-ai-sdk) 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.

```typescript
import { HarnessAgent } from '@ai-sdk/harness/agent';
import { cline } from '@ai-sdk/harness-cline';

const agent = new HarnessAgent({
  harness: cline,
});
```

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](https://ai-sdk.dev/providers/ai-sdk-harnesses/cline) 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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📚 **More updates:** [View all changelog entries](/changelog/sitemap.md) | [Blog](/blog/sitemap.md)