During September 2025, this developer focused on enhancing mobile user experience and advancing design-system adoption. On the polarsource/polar repository, they resolved a chart overflow issue on mobile Safari by ensuring ChartContainer defaults to full width when unspecified, improving responsiveness for small screens. In the facebook/stylex repository, they created a comprehensive Storybook integration example, demonstrating how StyleX can be used with React components such as Button and Card. Their work incorporated Babel, ESLint, PostCSS, and Vite to streamline component documentation and enforce consistent styling. Throughout, they emphasized reusable patterns and responsive design, contributing to more maintainable and scalable frontend systems.