The Big Picture — Every agent pattern is just a different graph shape
The agent thinks, acts, observes, and thinks again. It keeps looping until it has enough information to produce a final answer. This is the backbone of most reasoning agents.
4 nodes + 1 conditional + loop edge
When you need an agent that can reason step-by-step and use tools dynamically to gather information.
Every pattern is just a different arrangement of the same building blocks: Nodes, Edges, Conditional Edges, and Loops. LangGraph gives you the tools to build ANY of these — and patterns that haven't been invented yet.