Threads

A thread contains the accumulated state of a sequence of runs. When a run is executed, the state of the underlying graph of the assistant will be persisted to the thread.

A thread's current and historical state can be retrieved. To persist state, a thread must be created prior to executing a run.

The state of a thread at a particular point in time is called a checkpoint. Checkpoints are persisted and can be used to restore the state of a thread at a later time.

Learn more

• For more on threads and checkpoints, see this section of the LangGraph conceptual guide.
• The LangGraph Platform API provides several endpoints for creating and managing threads and thread state. See the API reference for more details.