During November 2024, thesmartwon focused on enhancing the reliability of the rolldown/rolldown repository by modernizing its watcher process. They replaced the legacy watcher worker, which relied on an infinite loop, with a timer-based approach to prevent premature main process exits while maintaining existing functionality. This change eliminated watcher-worker.js, reducing thread overhead and simplifying lifecycle management. Working primarily with Node.js, JavaScript, and TypeScript, thesmartwon improved system programming aspects and build tool reliability. The work demonstrated thoughtful refactoring and a clear understanding of runtime behavior, resulting in a more maintainable codebase without introducing new bugs or regressions.