Worked on the withastro/astro repository to address a regression affecting style preservation when project root paths differed in case from the underlying filesystem. Developed a case-insensitive path comparison function in JavaScript and TypeScript, ensuring consistent style rendering across Windows, macOS, and Linux environments. The solution involved updating the normalizeFilename logic to prevent unintended stripping of styles, with expanded test coverage to validate behavior on multiple operating systems. Collaborated with other contributors to deliver a robust fix, focusing on Node.js full stack development and comprehensive testing practices. This work improved build reliability and enhanced the developer experience across diverse platforms.