During December 2025, Yuangao developed Knowledge Base Folder Management for the xerrors/Yuxi-Know repository, focusing on scalable content organization and improved information retrieval. He designed and implemented backend APIs in Python and JavaScript to support folder creation, movement, and deletion, integrating these with a Vue.js frontend that displays a dynamic folder tree. Yuangao added drag-and-drop functionality for moving files between folders and enabled file uploads to specific locations within the structure. This end-to-end feature addressed onboarding and searchability challenges by allowing users to manage knowledge base content more efficiently, demonstrating depth in API development, full stack integration, and UI/UX design.