Worked on the core Django repository to enhance the stability of file download workflows by addressing a nuanced bug in the Content-Disposition header handling. Focused on backend development using Python and Django, the work involved implementing RFC-compliant logic to properly manage control characters in the content_disposition_header, ensuring that filenames are formatted correctly across different browsers. This targeted bug fix reduced edge-case failures and improved cross-browser compatibility for file downloads. Emphasized unit testing to validate the solution and maintain code quality. The contribution strengthened Django’s adherence to standards and improved the reliability of file downloads for a wide range of users.