During their tenure, Kucuny worked on the AdguardTeam/AdguardFilters repository, focusing on refining ad blocking configurations rather than introducing new features. They addressed a misconfiguration by removing the obsolete domain targetyo.yogiyo.co.kr from the tracking servers list, which reduced unnecessary tracking interactions and improved privacy for end users. The work involved careful analysis of filter rules and a targeted update to the configuration, ensuring minimal risk to existing functionality. Leveraging their skills in ad blocking and configuration management, Kucuny delivered a precise bug fix that enhanced the quality of the filter set, though no new features or languages were introduced.