Andrew Serong enhanced theming and API capabilities across the desrosj/wordpress-develop and WordPress/WordPress repositories during October 2025. He implemented support for border radius presets in theme.json, integrating with WP_Theme_JSON to enable granular styling options for frontend rendering. On the backend, Andrew improved the WordPress REST API’s media endpoint by adding an embeddable post link and standardizing the attached-to relation, simplifying integration for developers and clarifying API contracts. His work demonstrated strong PHP development, JSON configuration, and REST API design skills, delivering four features that deepened theme flexibility and improved the developer experience without introducing any new bugs.