Andy Wang focused on enhancing build correctness and CSS processing reliability in the rspack-contrib/rstack-examples repository. He addressed a nuanced issue in the build pipeline by refining the Rspack configuration, ensuring the lightningcss-loader applied exclusively to CSS files and removing a redundant CSS rule. This targeted fix prevented JavaScript comments embedded in CSS from being misprocessed, reducing build errors and improving consistency across environments. Working primarily with JavaScript and leveraging skills in build tools and configuration, Andy’s contribution streamlined the CSS asset pipeline, minimized production risks, and demonstrated a thoughtful approach to maintainability and reliability in modern frontend development workflows.