Developed a documentation-focused feature for the yypang2/SECP1513202420251-09 repository by introducing a dedicated Markdown file that links an external GitHub portfolio to the project. This update leveraged Markdown for clear, accessible documentation and utilized Git version control to ensure disciplined change management. The addition of the portfolio link improved project transparency and facilitated easier onboarding for new collaborators by providing direct access to external work references. No bugs were reported during this period, reflecting a low-risk, well-contained change. The work demonstrated attention to repository organization, documentation best practices, and effective use of cross-referencing within collaborative development environments.