During November 2025, Alessandro Gilardoni focused on improving code robustness in the nrfconnect/sdk-zephyr repository by addressing macro safety in embedded C code. He identified and fixed a bug in the INSTR_FETCHABLE macro, ensuring correct logical expansion by adding necessary parentheses to the macro definition. This targeted fix enhanced maintainability and prevented potential logical errors in future code changes. Alessandro applied his expertise in C programming, embedded systems, and macro programming to deliver a solution that improved code safety without introducing new features. The work demonstrated careful attention to detail and contributed to the long-term reliability of the codebase.