Worked on the ruby/rake repository over two months, focusing on improving test infrastructure and code quality. Refactored the test helper to replace an instance variable with a local variable, clarifying directory management and reducing side effects in test setups. Enhanced reliability by centralizing dependency loading and adopting built-in Ruby mechanisms for tracking loaded .rake files, which stabilized dependency management and prevented duplicate loads. Applied code cleanup and organization skills, including the use of Ruby and testing frameworks, to simplify system directory discovery and remove unused components. These changes improved maintainability, onboarding, and the overall clarity of the codebase.