Worked on the langgenius/dify repository to deliver core API improvements for the Knowledge Pipeline service, focusing on secure, scalable multi-tenant usage. Developed new API routes to support datasource plugins and pipeline runs, implementing tenant-based access controls and strengthening dataset token validation to enforce isolation. Enhanced the file upload API by introducing ISO 8601 serialization for creation timestamps and comprehensive unit tests to ensure reliability and data integrity. Utilized Python and Flask for backend development, emphasizing serialization and unit testing. Collaborated through co-authored commits and code reviews, contributing to improved maintainability and shared understanding within the development team.