How to build human in the loop experience in langserve.

[SoulEvill]

I am building an agent that is based on the langgraph, when it goes through certain state it will pop up for user input.

I would love to serve this through langserve - wondering if langserve would able to support this use case? or general idea how to build it out would be really appreaciated.

Thanks!

[Aillian]

have you figured this one out?

[mohith-jagalmohan]

I am also trying to figure this out

[eyurtsev]

Use langgraph platform with interrupt(). https://langchain-ai.github.io/langgraph/concepts/human_in_the_loop/

[Aillian]

The implementation of interrupt is very clear, one thing i couldn't figure out is how to pass Command(resume=...) in invoke with Langserve? @eyurtsev

[EiinGeeeL]

@Aillian and @mohith-jagalmohan... I'm encountering, I just need to send but give me Entity Error...

graph.stream(Command(resume={"action": "continue"}), config, stream_mode="updates"):

Its lookslike we can reproduce the interrupt but we cant send the Command due deprecation of Langserver...

#790

Here is the Migration guide...

https://github.com/langchain-ai/langserve/blob/main/MIGRATION.md

[Aillian]

@EiinGeeeL Twisting our arms to use their paid solution and depreciating an open source one is really frustrating!

If anyone knows any alternative open source solutions or ways to use features like human in the loop please share them...