Franck Ranaivo developed advanced CSS selector capabilities for the symfony/symfony repository, focusing on enhancing the CssSelector component with support for the :has() pseudo-class. He introduced a new RelationNode class to accurately model the :has() relationship, updating both the parser and translator to handle the new selector semantics. This work, implemented in PHP using Symfony and back end development skills, enabled more complex and expressive selector queries while maintaining compatibility with existing behavior. The feature improved the flexibility and maintainability of template and test contexts. Over the month, Franck delivered one feature, demonstrating depth in component-level engineering.