These pages detail the core interfaces you will use when building with LangGraph. Each section covers a different part of the ecosystem.
If you are just getting started, see the Quickstart for an introduction to the main concepts and usage patterns.

​
LangGraph

The core APIs for the LangGraph open source library.
  • Graphs: Main graph abstraction and usage.
  • Functional API: Functional programming interface for graphs.
  • Pregel: Pregel-inspired computation model.
  • Checkpointers: Saving and restoring graph state.
  • Storage: Storage backends and options.
  • Caching: Caching mechanisms for performance.
  • Types: Type definitions for graph components.
  • Config: Configuration options.
  • Errors: Error types and handling.
  • Constants: Global constants.
  • Channels: Message passing and channels.

​
Prebuilt components

Higher-level abstractions for common workflows, agents, and other patterns.