Worked on backend development in the schneems/rails repository, focusing on improving the reliability of attribute mutation tracking within Ruby on Rails. Addressed a data integrity risk by freezing the immutability of the OPTION_NOT_GIVEN constant in the AttributeMutationTracker module, ensuring it could not be modified at runtime. This technical approach reduced the potential for unintended behavior and enhanced the predictability of mutation logic. The change was implemented using Ruby and followed disciplined Git workflows, resulting in a targeted, auditable code update. No new features were added during this period, but the work contributed to the maintainability of the codebase.