Worked on the liquibase/liquibase repository to enhance backend stability by focusing on error handling and validation for changelog filePath attributes. Addressed a critical bug by implementing robust validation logic in Java, ensuring that empty or null filePath values trigger fast-fail exceptions with clear, descriptive messages. Improved the reliability of JSON and YAML serialization by expanding unit test coverage and refining error reporting, which aids developers in diagnosing serialization failures more efficiently. Refactored validation to the interface level and streamlined code quality through better exception handling patterns and cleaner variable naming, contributing to maintainable and collaborative backend development practices.