During April 2025, this developer enhanced the umnooob/course-demo repository by improving course project documentation. They authored a new Retrieval-Augmented Generation (RAG) topic entry in the 课程大作业.md file, including a direct GitHub repository link to facilitate student access. Using Markdown and Git version control, they updated deadlines and submission requirements to clarify project expectations and streamline assessment readiness. Their work focused on documentation quality, with attention to both Chinese and English language considerations, supporting better onboarding and traceability for students. The depth of their contribution lay in refining guidance materials rather than implementing new features or fixing bugs.