During November 2025, Jiabin Geng focused on enhancing tooltip functionality for dual-axis charts in the adobe/react-spectrum-charts repository. He refined the item tooltip logic and improved interaction modes, ensuring that tooltips accurately aligned with data points, even in complex edge cases. By adjusting hover area calculations, Jiabin made tooltips more responsive and consistent, which improved both data storytelling and the overall developer experience. His work leveraged React and TypeScript, applying front end development best practices to address nuanced user experience challenges. The depth of his contribution lay in the careful handling of dual-axis data representation and interactive chart behaviors.