During April 2025, Guthrey modernized the Mesh Transform API in the mfem/mfem repository by introducing a std::function overload, enabling lambda-based mesh transformations for both NULL and non-NULL node scenarios. This work involved refactoring the existing API to remove legacy raw function pointer overloads, thereby consolidating the interface and resolving previous ambiguities. By leveraging C++ and object-oriented programming principles, Guthrey improved the usability and extensibility of mesh transformation workflows. The changes focused on software design best practices, allowing users to define custom transformations more intuitively and setting a foundation for future functional-style enhancements within the mesh processing framework.