Worked on the pulumi/opentofu repository to refactor the CopyDir functionality, focusing on enhancing the reliability and modularity of directory copy operations. Applied Go development skills to extract file copying logic into a dedicated copyFile function, improving code reuse and maintainability. Emphasized robust error handling by introducing descriptive error messages using fmt.Errorf, which aids in debugging file operations and symlink evaluations. The changes improved code readability and laid the foundation for more resilient file copy workflows. This targeted update addressed operational risks and supports faster future feature development, demonstrating a methodical approach to refactoring and error management in Go projects.