Kunal Purohit delivered a comprehensive observability upgrade and refactor for the sentry-demos/empower repository, focusing on modernizing Sentry integration and infrastructure. He upgraded the Sentry Node.js SDK from version 7 to 10, refactored server and database configurations, and enhanced instrumentation to improve tracing and troubleshooting. By updating Express.js to the latest version and simplifying error handling, Kunal improved code maintainability and reduced technical debt. His work involved removing deprecated features, updating API syntax, and strengthening tracing support across service boundaries. Using JavaScript, Node.js, and the Sentry SDK, he enabled faster root-cause analysis and streamlined future development efforts.