In March 2026, Yavko developed a targeted feature for the keiyoushi/extensions-source repository, enhancing the Atsumaru search experience by introducing filters for adult content and official translations. Working end-to-end in Kotlin and leveraging API integration within an Android development context, Yavko enabled users to refine search results based on content type and localization, supporting both user control and compliance with content standards. The feature was delivered in a single, traceable commit, facilitating rapid QA and clear documentation. While the work focused on a single feature, it demonstrated depth in implementation and addressed both relevance and governance in search functionality.