Numan

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1. Oct 19
   Numan's Nu health coach puts evals first on LangGraph and LangSmith

   Numan, a UK digital health company, describes how its AI health coach Nu runs as a LangGraph graph in which a supervisor model hands conversations to domain-specialist sub-agents, with evaluation handled in LangSmith. Numan says single-turn static fixtures and pre-scripted multi-turn conversations both failed to assess coaching dialogues, so it scores per category and has prototyped simulated patient personas, in which a cheaper model plays the patient and a judge scores the full transcript. The post also details safety probes that gate releases, in-graph guard nodes that review each outgoing reply against clinical safety rules, and daily human review of sampled conversations, all aimed at keeping Nu a wellness product under MHRA guidance rather than a medical device.

   LangChain Blog · 🔥 0

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