Mrunmayee Sudumbrekar enhanced mock device testing in the tenstorrent/tt-umd repository by introducing backward-compatible support for legacy YAML cluster descriptors. She implemented C++ logic to parse the legacy boardtype field and generate synthetic chip_unique_ids when absent, ensuring that both older and modern descriptor formats are supported seamlessly. Her work focused on backward compatibility handling and YAML parsing, enabling robust testing across Wormhole N300 and N150 configurations. By aligning these enhancements with tt-metal’s mock device support and Fast Dispatch mode, she improved test coverage and reliability, reducing friction for teams working with legacy configurations while maintaining compatibility with evolving systems.