LangSmith

LangSmith, part of LangChain, is a platform that provides tools for debugging, testing, evaluating, and managing prompts for LLM applications. It offers functionalities like nested traces for debugging, dataset curation for testing, application-level usage stats for monitoring, and a prompt playground for managing prompts. LangSmith facilitates native collaboration, integrates with LangChain, and promotes best practices for LLM application development. It's designed to transform LLM applications into enterprise-ready products, emphasizing observability and testing in complex LLM apps