Kate McCubbins enhanced the Bullet Chart hover interaction in the adobe/react-spectrum-charts repository, focusing on refining the hoverable area to include only visually displayed elements. This targeted feature, implemented using React and TypeScript, improved tooltip accuracy and reduced user confusion by ensuring that hover events correspond strictly to visible chart components. Kate’s approach emphasized commit-driven development and minimal surface area changes, reducing the risk of regressions while optimizing the user experience. The work demonstrated a strong grasp of front end development and charting libraries, resulting in more reliable data visualization and clearer decision support for end users interacting with the charts.