I’m currently developing a multi-agent system. The main agent is a ReAct agent which can call a number of tools. I want one of these tools to be a subgraph, which will retrieve a large amount of data and summarise with a different LLM, but I couldn’t find anything on best practices for conditional r…

hi @fluxe You have two solid, first-class patterns in LangGraph for this. Pick based on how tightly you want to integrate the subgraph with graph execution (checkpoints, interrupts, navigation). Option A - Embed the subgraph as a node and route to it conditionally (tightest integration) Optio…

Thanks for the response, I’m guessing this was AI generated though? I did ask an LLM as well and it gave me similar output before asking here :stuck_out_tongue: - my question is what would be an idiomatic way to handle this? I did consider both option A and B, but A is undefined (my question is on h…

Yes, the content is 50/50 AI generated, since the input comes from my current knowledge and the examples come from AI - I am too lazy to provide examples on my own in the AI era :laughing: So your AI was actually right :slight_smile: Those two approaches are actually idiomatic in LangGraph ecosys…

And the official swarm project langgraph-swarm-py/langgraph_swarm/handoff.py at main · langchain-ai/langgraph-swarm-py · GitHub

How to use a subgraph as a tool?

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pawel-twardziak November 12, 2025, 6:09pm 5

Check the swarm doc there Multi-agent - Docs by LangChain and Swarm Architecture Agents in LangGraph | by Duarte Caldas Cardoso | Medium

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How to use a subgraph as a tool?

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