Design Smart AI Flows with LangGraph & LCEL

Building with LangChain gets even more powerful when you introduce LangGraph and LCEL (LangChain Expression Language). These tools allow you to design AI workflows like you’re sketching on a whiteboard—visually, modularly, and flexibly. Want to loop, branch, or parallelize LLM calls? Want to write cleaner chain logic? This guide will demystify LangGraph and LCEL with metaphors, visuals, and simple code snippets to help you level up your prompt engineering game.