Worked on the lynx-family/lynx-stack repository to deliver modern React JSX runtime support and strengthen TypeScript definitions, focusing on safer and more maintainable front-end development. The approach involved enabling tsconfig settings for 'jsx': 'react-jsx', extending TypeScript definitions for standard JSX elements, and introducing type errors for unsupported elements to reduce future runtime risks. This update, implemented using JavaScript and TypeScript, improved the developer experience by facilitating smoother migrations to the modern JSX runtime and supporting safer refactors. The work emphasized feature delivery and TypeScript alignment, with no major bug fixes during the period, reflecting a focus on foundational improvements.