Guo Yachao developed structured documentation for the MCS241039 exercise within the drshahizan/learn-github repository, focusing on improving onboarding and establishing a reusable documentation pattern. Using Markdown and leveraging documentation best practices, Guo created an initial placeholder README and then enhanced it with clear section headings, plain text explanations, and a sample data table to guide users through the exercise. The work addressed the need for scalable, maintainable educational resources and reduced future support requirements. Although no bugs were fixed during this period, the depth of the documentation work provided a strong foundation for future contributions and streamlined user experience.