Worked on the aws/smithy-go repository to modernize IO handling by refactoring deprecated ioutil usage to the recommended io package equivalents. This update improved compatibility with current and future Go toolchains, reduced technical debt, and enhanced maintainability for ongoing development. The approach focused on isolating changes within a single commit, minimizing risk and simplifying both code review and potential rollback. Leveraging Go, software refactoring, and unit testing skills, the work laid a foundation for smoother onboarding of new contributors and facilitated future upgrades. The refactor supports more reliable and performant IO-bound operations, aligning the codebase with modern Go best practices.