Worked on microsoft/moc-sdk-for-go and microsoft/moc, delivering four features focused on observability, reliability, and maintainability. Developed a unified logging system using Go and the logr library, introducing a standardized logger interface and default stdout logger to streamline error and info logging. Enhanced authentication by improving logging consistency and expanding test coverage for LoginWithConfig, while also increasing certificate renewal observability through detailed logging and robust error handling. Modernized dependency management by removing explicit Go toolchain pinning and upgrading to published versions. These improvements collectively strengthened backend reliability, simplified future maintenance, and improved issue tracing across both repositories.