langgraph-persistence

LangGraph state persistence uses checkpointer backends like InMemorySaver, SqliteSaver, or PostgresSaver to save graph state, enabling durable execution and multi-turn memory across invocations.

The best way to manage parallel subgraph execution in LangGraph is to use namespace isolation alongside thread_id, ensuring safe state scoping and preventing data collisions across concurrent subgraph operations.

Thread_id scoping isolates conversations by assigning a unique identifier to each execution thread, allowing the checkpointer to track history navigation, resume, and fork capabilities for specific state sequences.

Yes, SqliteSaver and PostgresSaver serve as checkpointer backends for long-running LangGraph workflows, providing durable execution by checkpointing graph state to databases for multi-turn investigations and alert-triggered analyses.

Yes, LangGraph persistence supports cross-thread memory using the store mechanism to retain long-term user preferences and shared data, operating independently from isolated thread_id checkpoint histories.

Configure checkpointer modes as False, None, or True to control state persistence behavior, determining whether the graph saves checkpoints, bypasses checkpointing entirely, or uses default persistence during invocations.