Replit, a leading platform for coding collaboration, has advanced AI innovation with the release of Replit Agent, a tool enabling developers to create sophisticated applications. The complexity of Replit Agent's workflows necessitated enhancements in tracing and observability, leading to collaboration between Replit and the LangChain team to augment LangSmith's capabilities. These enhancements included improved performance for handling extensive traces, the ability to search within traces for specific events, and a thread view that aids human-in-the-loop workflows by collating related traces. These innovations have expedited Replit's development process by streamlining the debugging and monitoring of their AI agents, setting a new standard for AI-driven development.