One Agent SDK

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One Agent SDKProvider-Agnostic LLM Agents

Write your agent once, run it on any backend — Claude, Codex, Kimi, and more.

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API Reference

Provider Agnostic

Swap between Claude, Codex, and Kimi with a single config change. No code rewrites needed.

Streaming First

Unified AsyncGenerator-based streaming interface across all providers. Process text, tool calls, and handoffs as they happen.

Multi-Agent Handoffs

Agents can hand off to each other seamlessly. Define handoff targets and the SDK handles the rest.

Type-Safe Tools

Define tools with Zod schemas for fully type-safe parameters and handlers. Works with Zod v4.