During November 2024, Sean McPherson enhanced accessibility in the Khan/wonder-blocks repository by updating the PhosphorIcon component. He implemented logic in JavaScript and TypeScript to automatically assign the ARIA role of 'img' when an aria-label is present, improving screen reader compatibility and aligning with accessibility standards. Sean added targeted test coverage to validate this new behavior and updated the documentation to ensure clarity for future contributors. His work focused on front end development with React, emphasizing minimal code changes for maintainability. The depth of the update addressed a specific usability gap, contributing to a more accessible and robust UI component.