Worked on backend reliability and compatibility improvements across craftcms/cms and phpDocumentor/Reflection repositories. Addressed a PHPStan error in craftcms/cms by removing an undefined UrlManager method call and ensuring UrlManager was properly defined in ApplicationTrait, which improved maintainability and reduced regression risk for URL handling. In phpDocumentor/Reflection, implemented dependency upgrades and tooling alignment to support PHP 8.2, enhancing reflection and type resolution accuracy. Utilized PHP, Makefile, and XML to update build processes and unit tests, focusing on continuous integration and dependency management. The work emphasized code quality, future-proofing, and robust DevOps practices within established PHP frameworks and libraries.