Andrew MacCuaig developed a feature for the web-infra-dev/rspress repository that conditionally renders the appearance switch in the navigation component based on the site’s darkMode configuration. Using React and TypeScript, he ensured the switch is visible only when dark mode is enabled, addressing a UI inconsistency and aligning the interface with user expectations. Andrew updated the relevant tests to reflect this new behavior, improving coverage and reducing the risk of regressions related to theme-based changes. His work focused on front end development, demonstrating a clear understanding of conditional rendering and configuration-driven UI logic within a modern TypeScript and React codebase.