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Overview Getting started useStream Selectors Interrupts & headless tools Subagents & subgraphs Fork & edit from a checkpoint Submission queue Multimodal media Transports Suspense StreamProvider & context Type safety Migrating to v1

Ui Client Auth React Logging React Ui Utils Server Stream

LangGraph Checkpoint

LangGraph Checkpoint MongoDB

LangGraph Checkpoint Postgres

LangGraph Checkpoint Redis

LangGraph Checkpoint SQLite

LangGraph Checkpoint Validation

LangGraph Supervisor

LangGraph Swarm

Language

Theme

Type●Since v1.0

MessageMetadataMap

Read-only map exposed via MessageMetadataTracker.store.

MessageMetadataMap: ReadonlyMap<string, MessageMetadata>

View source on GitHub