Worked on improving the stability of the rubocop/rubocop repository by addressing a bug in the Style/ModuleMemberExistenceCheck autocorrect feature. Focused on refining the static code analysis process in Ruby by updating the autocorrect logic to exclude constants from existence checks, thereby preventing unintended behavior changes during automated code fixes. Clarified the distinction between Module#const_defined? and Module#constants, ensuring more predictable outcomes for users applying autocorrections. Updated RSpec tests to reflect these semantic changes, enhancing the reliability of the tool. This work demonstrated careful risk management and contributed to safer, more robust static analysis workflows for downstream Ruby projects.