Colum McCoole developed a multi-mode authentication system for the Backstage rag-ingestor within the cnoe-io/ai-platform-engineering repository. He implemented both static and OAuth2 authentication strategies, introducing environment variable validation and token caching with proactive refresh logic. Using Python and focusing on backend development and API integration, Colum aligned the authentication flow with Backstage’s evolving backend, ensuring compatibility with OpenChoreo’s requirements and resolving previous authorization issues. His work maintained upstream logic for pagination and job tracking, preserving backward compatibility. The depth of the solution addressed security, reliability, and interoperability, reflecting a thoughtful approach to authentication mechanisms in a complex environment.