During June 2025, Mykhailo Peleshenko focused on backend development in C# to enhance data integrity within the Radarr and Sonarr repositories. He addressed critical bugs related to IMDB-ID-based synchronization and import-list processing, ensuring that comparisons and deletions only occurred when both entities had valid IMDB IDs. This approach prevented erroneous removals and synchronization failures, particularly for entries lacking IMDB IDs, thereby reducing the risk of unintended data loss. By strengthening the robustness of library maintenance workflows and expanding test coverage around IMDB ID handling, Mykhailo improved reliability for users managing media libraries with these C#-based systems.