LangChain 2026 Day 1: Building the LangGraph Brain (Full Beginner Guide)

Description

Welcome to Day 1 of my LangChain 2026 Course! Today we break down LangGraph, the core of modern LangChain workflows. You’ll learn how the LangGraph Brain works, how nodes communicate, how to build planning → retrieval → reasoning loops, and why LangGraph became essential in 2026. In this episode you’ll learn: What LangGraph is How to build a simple graph Planner + tool + retrieval nodes Memory and agent workflows Setting up your LangChain 2026 project 📌 GitHub Code: https://github.com/sebuzdugan/langchain-course-2026 📚 Full LangChain 2026 Course Playlist: https://www.youtube.com/playlist?list=PLH2Jo7IpHaBR3uuBh8HUqjAPbwL575XNB If you want to master LangChain, RAG, agents, and AI workflows in 2026, follow this 10-day series.