Guo Yachao developed structured documentation for the MCS241039 exercise within the drshahizan/learn-github repository, focusing on improving onboarding and reducing support needs for new users. Using Markdown and leveraging strong documentation skills, Guo first created a placeholder README and then enhanced it with clear headings, plain text explanations, and a sample data table to guide users through the exercise. The approach established a reusable documentation pattern that can scale with future educational content in the repository. While no bugs were addressed during this period, the work demonstrated depth in technical writing and attention to clarity, directly supporting the repository’s educational goals.