Worked on the grafana/prometheus repository, focusing on a targeted code quality refactor to improve value checks throughout the backend. The approach involved replacing multiple instances of duplicate value checks and membership tests with the Go standard library’s slices.Contains function, streamlining code paths and enhancing maintainability. This change reduced technical debt and standardized how membership checks are performed, making the codebase more readable and consistent for future contributors. By leveraging Go and backend development skills, the refactor laid a foundation for safer future enhancements and easier onboarding, while adhering to clean code practices and improving overall code clarity without introducing new features.