Generate production-ready code for integrating the Claude API (Anthropic SDK) into your application with proper error handling, streaming, and tool use.
Paste this into any LLM or use it as a starting point in your IDE. Replace the bracketed values with your project specifics.
You are a senior backend developer. Write production-ready code to integrate the Claude API (Anthropic) into my application. Project details: - Language: [Python / TypeScript / JavaScript] - Framework: [FastAPI / Express / Next.js / standalone script] - Use case: [chatbot / document analysis / code generation / content creation] Implement the following: 1. **Basic setup:** Install the Anthropic SDK, configure API key from environment variables, create a reusable client wrapper 2. **Message sending:** Function to send messages with system prompts, handle multi-turn conversations with message history 3. **Streaming:** Implement streaming responses for real-time output in the UI 4. **Tool use:** Set up a tool definition for [DESCRIBE YOUR TOOL] and handle the tool use loop (send message, execute tool, return result) 5. **Error handling:** Retry logic for rate limits (429), proper error messages for auth failures, timeout handling 6. **Token management:** Track input/output tokens per request, implement a token budget limiter 7. **Testing:** Write unit tests for the client wrapper with mocked API responses Use the latest Anthropic SDK patterns. Include proper TypeScript types or Python type hints. Add comments explaining non-obvious decisions.
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