Originally published on Medium . I spent three weeks building a LangGraph-based project because I was frustrated with the limitations of traditional machine learning models. I had tried using Hugging Face and FastAPI to build a simple chatbot, but I quickly realized that I needed a more robust framework to handle complex conversations. That's when I discovered LangGraph, and it changed everything. In this article, you'll learn how to build a LangGraph-based project from scratch, and by the end of it, you'll have a solid understanding of nodes, edges, and state in LangGraph. My journey with LangGraph started with a simple goal: to build a conversational AI that could understand and respond to user queries. I had tried using pydantic and TypedDict to define my data models, but I soon realized that I needed a more flexible framework to handle the complexities of natural language processing. That's when I started exploring LangGraph, and I was amazed by its simplicity and power.…