Koffey worked on architectural cleanup for the DynamoDB MCP Server in the awslabs/mcp repository, focusing on removing operational wrapper functions to decouple design and modeling guidance from runtime operations. Using Python and AWS, Koffey refactored the server to isolate DynamoDB design responsibilities, while operational tasks were delegated to the AWS API MCP Server. This approach clarified ownership boundaries, reduced code surface area, and improved maintainability. The work did not introduce new user-facing features but provided a cleaner architecture that supports faster, design-first iterations and easier onboarding for future changes, demonstrating depth in refactoring and server development skills.