During December 2024, Valentin Limousin built configuration-driven enhancements for the SegmentLinking/cmssw repository, focusing on the Mixing.py module. He introduced new options for bunch spacing and pile-up distribution, enabling users to select between BS and Flat modes for simulation control. Using Python and leveraging configuration management and simulation expertise, Valentin updated the defineMixing logic to parse and apply these parameters, streamlining scenario setup and validation. This work improved reproducibility and parameter tuning for CMSSW simulations, reducing manual intervention. Although no bugs were fixed, the changes emphasized extensibility and maintainability, aligning the module with evolving project requirements and roadmaps.