Worked on CPU erratum mitigation within the openjdk/leyden repository, focusing on improving the correctness and safety of the IntelJccErratumMitigation flag handling. Addressed a bug by ensuring the flag is only computed and set when at its default value, reducing the risk of unsafe or incorrect mitigation behavior. Refactored the flag-setting logic to use the ergonomic FLAG_SET_ERGO path, streamlining future maintenance and enhancing code clarity. Leveraged expertise in C++, CPU architecture, and low-level system programming to deliver a robust solution that consolidates mitigation logic, ultimately improving the maintainability and reliability of Leyden’s core CPU erratum mitigation path.