During December 2025, Michael Bolivar focused on code quality improvements in the nrfconnect/sdk-zephyr repository by standardizing instance-number terminology across device tree macros. He applied his expertise in C programming, embedded systems, and device tree management to align macro names with existing documentation, reducing ambiguity and improving code readability. This cleanup enhanced maintainability and minimized the risk of future refactoring by ensuring consistent macro conventions throughout the codebase. Although no major bugs were addressed during this period, Michael’s work targeted long-term stability and safer macro evolution, demonstrating a methodical approach to repository hygiene in a critical subsystem of the project.