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

LangGraph Checkpoint

LangGraph Store

Checkpoint Postgres

Checkpoint SQLite

LangGraph Prebuilt

LangGraph Supervisor

LangGraph Swarm

Language

Theme

PythonlanggraphconstantsSTART

Attribute●Since v1.2

START

The first (maybe virtual) node in graph-style Pregel.

Copy

START = sys.intern('__start__')

Used in Docs

Backward compatibility
Build a multi-source knowledge base with routing
Checkpointers
Custom workflow
Fault tolerance

(8 more not shown)

View source on GitHub

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