Chris contributed to the nrfconnect/sdk-zephyr repository by implementing payload alignment support for the STM32 signing tool, addressing a regression introduced in version 2.21.0 and above. Using CMake and leveraging expertise in embedded systems and firmware development, Chris added a conditional -align flag in the post-build signing step, ensuring correct 0x400 offset alignment for newer tool versions while maintaining backward compatibility through version gating. The update also included refactoring local CMake variables to lower-case for consistency. This work improved the reliability of firmware signing, reduced post-build failures, and preserved compatibility with the Zephyr signing flow for embedded projects.