The Business Case for LangGraph Checkpoints: Agents That Survive a Restart
· 9 min read
The most expensive component in an agent is not the model. It is the record you decided not to write. LangGraph's answer is a checkpointer compiled into the graph and keyed by the run's thread id, saving graph state between steps so a restarted run resumes from its last checkpoint instead of starting again (LangChain docs, persistence).