Yuki Okuno enhanced the rubocop/rubocop repository by improving documentation for the Layout/ClassStructure cop configuration, focusing on clarifying how macro and method ordering is enforced within Ruby classes. Through careful code analysis and updates, Yuki specified that both ExpectedOrder and Categories must be defined for macros such as attr_reader to be properly recognized and ordered, addressing a common source of misconfiguration. This work, implemented in Ruby and centered on documentation best practices, improved onboarding and consistency for RuboCop users. The depth of the update lies in its attention to detail, ensuring that configuration guidance is both accurate and actionable for developers.