RealChar, an open-source AI character framework, offers users the ability to create and interact with AI characters across various platforms, leveraging advanced tools in the Generative AI/LLM space like LangChain. It has gained significant attention for its sophisticated technology and polished user interface, becoming a top-trending GitHub repository. The RealChar team utilizes LangSmith for monitoring and managing the high traffic and conversation logs, finding it particularly useful for tracking errors, evaluating prompts, and maintaining reliability. LangSmith's comprehensive analytics, observability, and evaluation features have effectively replaced RealChar's in-house monitoring tools, making it indispensable for managing a production-level application with substantial traffic.