Worked on enhancing the PresenceAvatarList component in the box/box-ui-elements repository, focusing on frontend feature delivery and code quality. Introduced Blueprint tooltips to provide contextual information on avatars, improving user experience and aligning with product UX goals. Added an enableModernizedComponents prop to support ongoing modernization efforts without disrupting existing functionality. Updated and expanded tests and snapshots to ensure robust coverage and reliability, addressing reviewer feedback and maintaining high code standards. Utilized JavaScript, TypeScript, and React to implement these changes, emphasizing maintainability and forward compatibility. No major bugs were fixed during this period, with efforts concentrated on feature development and testing.