The tool runner handles the agentic loop, error wrapping, and type safety so you don't have to. When you need human-in-the-loop approval, custom logging, or conditional execution, use the manual loop instead.

Instead of manually handling tool calls, tool results, and conversation management, the tool runner automatically:

• Runs tools when Claude calls them

• Handles the request/response cycle

• Manages conversation state

• Provides type safety and validation

  The tool runner is in beta and available in the Python SDK, TypeScript SDK, C# SDK, Go SDK, Java SDK, PHP SDK, and Ruby SDK.

本篇目录

• Basic usage
• Iterating over the tool runner
• Advanced usage
• Streaming
• Next steps