During October 2025, this developer enhanced core theme and API functionality across the desrosj/wordpress-develop and WordPress/WordPress repositories. They implemented support for border radius presets in theme.json, enabling granular styling options rendered via the WP_Theme_JSON system. Additionally, they improved the REST API media endpoint by adding an embeddable post link and standardizing the attached-to relation, simplifying integration for client applications. Their work focused on backend development using PHP, JSON, and CSS, with careful attention to WordPress REST API conventions and theme configuration. These contributions improved frontend theming flexibility and clarified API contracts for developers working with media attachments.