Worked on the github/spark-template repository to enhance application stability by introducing global error handling for the front end. Developed an application-wide error boundary using react-error-boundary, integrating a user-facing ErrorFallback UI to gracefully manage runtime errors. In development mode, errors are rethrown to support debugging, while production users receive a stable fallback experience. This approach, implemented with React and TypeScript, improves runtime reliability and lays the groundwork for future observability and error reporting. The work focused on error handling and front end development, reducing user-visible crashes and providing a more robust user experience without addressing bug fixes during the period.