In Scope
libs/langgraph — Core graph execution engine (Pregel,
StateGraph, channels, functional API with
@entrypoint/@task)libs/prebuilt — High-level agent APIs (ToolNode,
create_react_agent, ValidationNode,
InjectedState/InjectedStore/ToolRuntime injection)libs/checkpoint — Checkpoint
serialization/deserialization (JsonPlusSerializer, EncryptedSerializer,
BaseCache, stores, serde event hooks, SAFE_MSGPACK_TYPES allowlist)libs/checkpoint-postgres — PostgreSQL checkpoint saver,
key-value store, and vector searchlibs/checkpoint-sqlite — SQLite checkpoint saver,
key-value store, and vector searchlibs/cli — CLI for Docker-based deployment
(langgraph up/build/dev/new), WebhookUrlPolicylibs/sdk-py — Python SDK client for LangGraph Server
API (HttpClient, Auth system, Encryption handlers)