Worked on the Automattic/wordpress-activitypub repository to enhance the reliability of comment retrieval logic, focusing on preserving likes and reposts when excluding other comment types. Addressed a regression that previously filtered out these engagement signals, ensuring accurate cross-platform activity representation. The solution involved refining backend PHP queries and expanding unit test coverage to verify correct filtering behavior when type exclusions are applied. By prioritizing data integrity and robustness, the work reduced downstream bug reports and support tickets related to comment filtering. Emphasis was placed on backend development and unit testing, with all changes implemented in PHP to maintain platform stability.