langgraph-persistence

LangGraph persistence checkpointing saves graph state across super-steps and invocations, ensuring multi-turn conversations can resume and contexts can be rehydrated durably. Compile your graph with a chosen checkpointer to enable this cross-session state durability.

Thread_id scoping isolates per-thread checkpoints to avoid cross-talk in parallel executions, while a Store provides cross-thread memory for sharing long-term user preferences and facts across multiple distinct conversations using InMemoryStore or Postgres backends.

Yes, PostgresSaver is supported as a backend for LangGraph checkpointing. It enables durable state persistence across multi-threaded conversations and subgraphs, ensuring graph state remains accessible for cross-session memory and time travel.

LangGraph persistence enforces thread_id and subgraph namespace scoping to isolate state. This prevents cross-talk during parallel executions by ensuring each thread and subgraph maintains its own independent checkpointed state context.

Checkpointing is needed for interruptible subgraphs when you require durable execution and the ability to resume contexts after interruptions. It applies to multi-threaded conversations and cross-session memory where state needs durability across super-steps.

LangGraph state management supports checkpointer options set to False, None, or True. These options dictate whether you have no persistence, per-thread checkpoints, or full multi-turn state across invocations, backed by InMemorySaver or PostgresSaver.