Developed Minimal Flavor Violation (MFV) model support within the SMEFT framework in the silvest/HEPfit repository, focusing on robust physics modeling and maintainable code structure. Implemented the initial NPSMEFTd6MFV model using C++ and object-oriented programming, introducing a dedicated model class, parameter definitions, and ModelFactory integration. Enhanced parameter generation and refactored naming conventions to ensure consistency across models. Strengthened initialization error handling by enforcing strict validation of SMEFTBasisFlag, improving reliability for downstream analyses. The work emphasized software engineering best practices, resulting in a more extensible and robust codebase that supports advanced physics scenarios and facilitates future development.