anth-core-workflow-b

# Anthropic Core Workflow B — Streaming & Batches ## Overview Two complementary patterns: real-time streaming for interactive UIs (SSE events via `POST /v1/messages` with `stream: true`) and the Message Batches API (`POST /v1/messages/batches`) for processing up to 100,000 requests asynchronously at 50% cost reduction. ## Prerequisites - Completed `anth-install-auth` setup - Familiarity with `anth-core-workflow-a` (Messages API basics) - For batches: understanding of async/polling patterns ## Instructions ### Streaming — Python SDK ```python import anthropic client = anthropic.Anthropic() # Method 1: High-level streaming (recommended) with client.messages.stream( model="claude-sonnet-4-20250514", max_tokens=2048, messages=[{"role": "user", "content": "Write a short story about a robot."}] ) as stream: for text in stream.text_stream: print(text, end="", flush=True) # After stream completes, access full message final_message = stream.get_final_message() print(f"\nUsage: {final_message.usage.input_tokens}+{final_message.usage.output_tokens}") # Method 2: Event-level streaming (for custom event handling) with client.messages.stream( model="claude-sonnet-4-20250514", max_tokens=2048, messages=[{"role": "user", "content": "Explain REST APIs."}] ) as stream: for event in stream: if event.type == "content_block_delta": if event.delta.type == "text_delta": print(event.delta.text, end="")...