Contributed to the silvest/HEPfit repository by delivering targeted improvements to theoretical model calculations in high energy physics. Over two months, addressed critical bugs in the GeneralTHDMZ2 and GTHDM modules, correcting parameter calculations and sign errors to ensure alignment with published research and canonical references. Enhanced the R1p observable computation by refactoring the codebase to incorporate next-to-leading order corrections, updating eigenvalue calculations for improved accuracy and maintainability. Emphasized code quality and reproducibility through disciplined version control and well-documented commits. Utilized C++ for development, applying expertise in numerical analysis, theoretical physics, and high energy physics to improve model reliability.