Worked on maintaining and improving code quality in the openjdk/leyden repository, focusing on documentation accuracy within Java code. Addressed a concurrency-related typo in the AbstractDocument class, updating a comment to correctly describe thread-safety and concurrent access behavior. This targeted documentation correction aimed to enhance clarity for future contributors and reviewers, reducing onboarding friction and minimizing the risk of misinterpretation during maintenance. Employed skills in code refactoring and technical documentation to ensure the codebase accurately reflected intended behavior. No new features were introduced during this period, with efforts concentrated on precise communication and safer long-term maintenance practices within the project.