During the month, contributed to the symfony/symfony repository by enhancing the Validation Framework with a targeted API improvement. Developed and integrated the findByCodes() method into the ConstraintViolationListInterface, enabling developers to efficiently retrieve constraint violations by error codes. Established a deprecation path for legacy interface usage, guiding future updates and ensuring smoother API evolution. This work, implemented using PHP and Symfony, focused on improving usability, maintainability, and debugging efficiency within the validation component. Although no bugs were fixed during this period, the feature delivered measurable business value by streamlining quality assurance workflows and supporting better developer ergonomics in back end development.