Worked on the JetBrains/intellij-community repository to deliver targeted refactoring aimed at improving code modularity and maintainability. Focused on Kotlin, the work involved extracting NextEditBaseAction and encapsulating NextEditCodeInsightSuggestionProviderBase, which reduced coupling and clarified component responsibilities. By making performChangeSignature private, the changes tightened access control and minimized the risk of unintended usage. These updates established a safer foundation for future feature enhancements and proposals integration, supporting a more robust architecture. The approach emphasized software design best practices, resulting in clearer extension points and improved collaboration for current and future contributors, while laying groundwork for ongoing platform stability and productivity.