LangChain Reference home page

GitHub
Main Docs

Overview
Graphs
Functional API
Pregel
Checkpointing
Storage
Caching
Types
Runtime
Config
Errors
Constants
Channels
Agents

LangGraph Checkpoint

Checkpoint Postgres

Store Postgres

Checkpoint SQLite

LangGraph Prebuilt

LangGraph CLI

LangGraph SDK

LangGraph Supervisor

LangGraph Swarm

⌘I

LangChain Assistant

Ask a question to get started

Enter to send•Shift+Enter new line

Menu

Overview Graphs Functional API Pregel Checkpointing Storage Caching Types Runtime Config Errors Constants Channels Agents

LangGraph Checkpoint

Checkpoint Postgres

Checkpoint SQLite

LangGraph Prebuilt

LangGraph Supervisor

LangGraph Swarm

Language

Theme

PythonlanggraphtypesCheckpointTaskerror

Attribute●Since v1.1

error

Copy

error: NotRequired[str]

View source on GitHub

Error message, present only if the task failed.