Anthropic Messages API — Streaming & Advanced Patterns Overview The Messages API is the only inference endpoint. Every Claude interaction goes through . This skill covers streaming, system prompts, vision, and structured output. Prerequisites - Completed - Familiarity with Instructions Step 1: Streaming Responses Step 2: Vision — Sending Images Step 3: JSON / Structured Output Python Streaming Output - Non-streaming: Full object with , , - Streaming events: - — message metadata - — new content block beginning - — incremental text ( ) or tool input ( ) - — final and usage - — stream complete E…