During September 2025, Dalcinl developed preliminary support for the MPI_LOGICAL16 datatype in the open-mpi/ompi repository, enabling 16-byte logical types for Fortran on compatible platforms. This work involved updating build system configuration scripts and header files to recognize and define the new datatype, ensuring seamless integration with existing MPI infrastructure. Using C, Fortran, and Python, Dalcinl focused on enhancing portability and laying the foundation for broader Fortran datatype support. The implementation addressed the need for expanded Fortran interoperability, aligning with project roadmaps and providing a technical basis for future enhancements in MPI’s handling of complex Fortran datatypes.