Jhan Mario Bolivar Peña developed a reusable utility function for the excalidraw/excalidraw repository that calculates the center point of Excalidraw elements. By centralizing this logic into a single TypeScript utility, he reduced code duplication and improved maintainability across both utility and shape calculation modules. His approach focused on code refactoring and utility function development, ensuring that future enhancements to center-point calculations could be managed more efficiently. The work, implemented in TypeScript and JavaScript, provided a cleaner API for element center calculations and laid the groundwork for easier cross-module collaboration and future refactors within the codebase.