This is not available yet. This page describes what is coming, so you can plan for it. Until then, use what the page suggests below.
What it will do
An agent will be able to pause a run to ask a person for approval or input, and be resumed on the same session with their answer. The run ends with aninterrupt event describing what it needs, and the next call answers it. LangGraph’s interrupts will work first.
What to use today
Model the pause as two calls on one session. The first call ends with a reply asking the question; the second sends the answer as its prompt, with the samesessionId. A LangGraph graph with a checkpointer picks up from its state. See Sessions.