langgraph-fundamentals

What problem does it solve?

This Skill provides the core concepts and vocabulary for building LangGraph applications. It covers how to define StateGraph state, reducers, nodes, edges, and how graphs are compiled and executed. It helps new engineers rapidly get up to speed with the LangGraph model, reducing time-to-first-usable graph.

Core Features & Use Cases

• State definitions: TypedDict or Pydantic for Python, or Zod for TypeScript, with override and reducer semantics.
• Nodes and Edges basics: How to create nodes, connect with edges, and use conditional routing.
• Compilation & Execution: How graphs are compiled and invoked with or without streaming and persistence.

Quick Start

Define a minimal State, add two simple nodes and a fixed START->END edge, compile, then run with an initial state to observe state updates.