Breakpoints in subgraphs: How to add human-in-the-loops in subgraphs?

[minki-j]

Suppose I have main_graph that include sub_graph, and I want to set a breakpoint in the sub_graph. I've tried this but didn't work throwing an error ValueError: No tasks to run in graph. since the main_graph doesn't have breakpoint.

I think there are many use cases where you need to add breakpoint in subgraphs not only the highest-level graph. Is there a way to do that or any plan to support that?

Thank you.

[hinthornw]

There's a PR out to add proper support that should go in within the next week / release - just want to ensure we have adequately tested it first

[rikki-pan-mck2]

@hinthornw I have a similar question related to breakpoint in subgraph and how state updates work in this case. When could we expect the PR to be merged?

[hwchase17]

this is a bit delayed as we're trying to figure out how to do it properly. will update here when we ahve a clearer path to resolution

[minki-j]

I guess the feature is pushed as I can't see any PR related to this. Correct?

[nfcampos]

Yes this has been released. See docs here https://langchain-ai.github.io/langgraph/how-tos/subgraphs-manage-state/#resuming-from-breakpoints