Tutorial demonstrates LangGraph agent with FastAPI and streaming via SSE

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A technical tutorial demonstrates building an AI agent with LangGraph orchestration and FastAPI for API exposure. The agent incorporates a real weather tool using Open-Meteo and streams execution updates via Server-Sent Events (SSE). The architecture separates agent logic from HTTP transport to create a clear, extensible foundation. This approach introduces considerations like network failures and tool errors absent in simple LLM completions.

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