LangGraph
Stateful graph orchestration for controllable agents.
Open source
Best when agent behavior must be represented as explicit nodes, edges, state, and recovery paths.
Official resources
Selection advice
Choose LangGraph when production safety depends on knowing exactly where a run is and what can happen next.
Best for
- stateful workflows
- human review nodes
- replayable orchestration
Not ideal for
- simple one-shot assistants
- teams that do not want to model state explicitly
Core concepts
nodesedgesstatecheckpoints
Minimal implementation shape
Model the workflow as retrieve -> decide -> act -> review, persist state between nodes, and trace every transition.