Worked on the symfony/symfony repository to address a targeted bug in the WebProfilerBundle, focusing on improving the clarity of deprecation messages related to routing configuration. The approach involved correcting typos and updating file extension references to align with recommended import practices, as well as enhancing migration guidance for developers transitioning from XML to PHP configuration formats. This PHP-based work emphasized configuration management and bug fixing, aiming to reduce confusion and support overhead for teams upgrading Symfony applications. The changes streamlined onboarding and upgrade processes, ensuring that documentation and in-code messaging more accurately reflect current best practices within the Symfony ecosystem.