During their work on the LLNL/serac repository, MacNider enhanced the extensibility of physics modules by introducing a virtual setParameter method, enabling derived modules to customize parameter behavior and laying the groundwork for future residual physics functionality in C++. They also addressed a documentation inconsistency in the Material Model Stress Type, clarifying that material model functions return the first Piola stress, not Cauchy stress, to better align with the code’s actual material response calculations. Their contributions focused on C++ development, object-oriented programming, and documentation, improving API clarity, reducing onboarding time, and supporting more flexible experimentation with physics models.