Worked on the docker/buildx repository to streamline the build controller architecture by removing the gRPC-based controller service and associated session and remote controller code. Focused on code refactoring and controller development using Go, the effort reduced maintenance overhead and simplified the codebase. By eliminating deprecated and unused functionalities, the changes laid a foundation for future enhancements and made onboarding easier for new contributors. The work involved careful restructuring of data types and dependencies, ensuring compatibility with existing build systems. This targeted cleanup addressed a key bug and improved the maintainability of the project, supporting ongoing development and architectural clarity.