During January 2026, B. Chowdhury enhanced the ProtoDUNE VD cosmic simulation configuration within the DUNE/dunesw repository, focusing on improving model fidelity and validation readiness. By updating FCL configuration files, Chowdhury adjusted quantum efficiency and scintillation pre-scale parameters, directly increasing the accuracy and reproducibility of simulation results. The work leveraged skills in data analysis, scientific computing, and simulation configuration, with careful attention to commit traceability and documentation for future review. Although the contribution was limited to a single feature over one month, the changes laid a solid foundation for subsequent improvements in simulation fidelity and experimental validation workflows.