Worked on enhancing the robustness of the solver export path in the moby/buildkit repository, focusing on backend development and system programming using Go. Addressed a critical edge case where missing records, specifically those resulting in ErrNotFound, could cause infinite loops during export. Implemented safer handling and termination logic to prevent stalled builds and runtime errors, aligning export records with those used for alternatives to maintain consistency. Expanded test coverage by adding an integration test targeting the ErrNotFound scenario, ensuring reliability. The work emphasized stability and reliability over new features, with a strong focus on testing and core system behavior improvements.