During November 2024, Bobby Prani refactored the store set construction in the O3 CPU model within the gem5/gem5 repository, integrating it with the Generic Cache Library. This work enabled the use of associative cache structures and multiple replacement policies, enhancing the configurability of cache behavior for performance analysis and research. By centralizing store set logic, Bobby improved code maintainability and simplified experimentation with different cache configurations. The implementation, primarily in C++ and Python, focused on building a flexible, testable foundation for CPU and cache simulation. The depth of the work provided a robust platform for future architectural exploration.