Worked on the rubocop/rubocop repository to enhance the reliability of static code analysis by addressing a bug in the Lint/DuplicateMethods cop. Focused on improving detection accuracy for duplicate methods defined within anonymous classes, modules, and cases lacking an explicit receiver, the work involved delivering a targeted Ruby fix and supplementing it with comprehensive RSpec tests. This approach reduced both false positives and negatives, thereby increasing confidence in continuous integration results. By refining linting behavior and collaborating with the open-source community, the developer enabled safer refactoring and streamlined triage, leveraging expertise in Ruby, RSpec, and static code analysis techniques.