Ellen Yan enhanced the MicrosoftDocs/defender-docs repository by improving the clarity and structure of Defender Antivirus health reporting documentation across Windows, Linux, and macOS. She focused on reorganizing prerequisite information, moving up-to-date requirements into dedicated note blocks to streamline user guidance and maintainability. Using Markdown and leveraging her documentation skills, Ellen ensured that updated guidance reflected current product criteria and compatibility with the up-to-date card feature. Her work emphasized accuracy and traceability, supporting self-service troubleshooting and reducing support inquiries. Over two months, Ellen delivered two targeted documentation features, demonstrating depth in technical writing and thoughtful information architecture improvements.