LangGraph Basics
Building workflows as graphs — the State schema, nodes as functions, edges and conditional (router) edges, compiling and invoking a StateGraph, the add_messages reducer, and a tool-calling chatbot with ToolNode + tools_condition.
Building workflows as graphs — the State schema, nodes as functions, edges and conditional (router) edges, compiling and invoking a StateGraph, the add_messages reducer, and a tool-calling chatbot with ToolNode + tools_condition.
The LangChain v1 essentials — create_agent, one init_chat_model call across OpenAI/Gemini/Groq, the message types, tool binding and the tool-calling loop, structured output with Pydantic/TypedDict, and middleware like summarization.