In April 2025, YS focused on enhancing the lynx-family/lynx-stack repository by delivering modern React JSX runtime support and strengthening TypeScript definitions. They enabled tsconfig settings for 'jsx': 'react-jsx', extended TypeScript coverage for standard JSX elements, and introduced type errors for unsupported elements, which improves type safety and reduces future runtime risks. Working primarily with JavaScript, TypeScript, and React, YS prioritized feature delivery and developer experience, facilitating safer refactors and smoother migrations to the modern JSX runtime. The work demonstrated a strong grasp of build tools and front-end development, with depth in aligning TypeScript and React integration.