During October 2025, Riccardo Rossi focused on enhancing the stability and forward compatibility of core linear solvers in the KratosMultiphysics/Kratos repository. He addressed two critical bugs by introducing a Clear() call within the Solve() method to ensure the solver’s internal state resets between runs, preventing cross-solve contamination. Additionally, he resolved a type conversion issue by explicitly casting an enum to double in the nodal_distance calculation, ensuring compatibility with C++20 standards. Working primarily in C++ and leveraging his expertise in linear solvers and regression debugging, Riccardo’s targeted code maintenance improved solver reliability and reduced future maintenance overhead for the project.