subtopic

LangGraph basics: state, nodes and edges

Learn LangGraph's 3 ideas: state (a shared dictionary, here the list of messages), nodes (functions: the model node and the tool node) and edges (which node runs next; a conditional edge goes to the tools if the model asked for one, otherwise ends). Build the graph, draw it, and run your first tasks. Then compare with the ready-made create_react_agent.