langgraph-persistence

To persist LangGraph state across multiple conversation turns, configure a checkpointer such as InMemorySaver or PostgresSaver and validate thread_id presence to enable checkpointed graph state between steps.

Yes, you can share user preferences across different LangGraph threads by configuring a cross-thread store to maintain long-term memory and facts across isolated concurrent conversations.

LangGraph checkpointing enables time travel by allowing you to browse state history, replay past checkpoints, or fork previous states to resume work from any point in the graph execution.

Yes, a thread_id is required for LangGraph subgraph persistence to control checkpointer behavior for interrupts, multi-turn memory, and parallel subgraph executions.

Available checkpointers for LangGraph state management include InMemorySaver, SqliteSaver, and PostgresSaver, which persist graph state between steps for durable multi-turn interactions.

To handle parallel subgraphs in LangGraph with checkpointing, configure subgraph scoping to control checkpointer behavior for interrupts and multi-turn memory across concurrent executions.