Martin Tupek developed enhancements for reaction force computation and sensitivity analysis under contact conditions in the LLNL/serac repository. He focused on improving the accuracy and robustness of solid mechanics simulations by introducing new C++ functions to calculate reaction directions and their sensitivities, specifically targeting scenarios with active contact. His work leveraged finite element analysis techniques to address challenges in reaction force calculations, enabling more reliable design optimization and analysis workflows. Martin also improved code quality and documentation, supporting future development and onboarding. Over the course of the month, he delivered a feature that deepened the simulation capabilities without addressing bug fixes.