During January 2025, Tahv D. Brand worked on the stan-dev/bayesplot repository, focusing on improving cross-version compatibility with ggplot2 in R. He addressed a persistent bug by updating test cases and modernizing histogram aesthetics, replacing deprecated parameters to ensure consistent visual outputs across multiple ggplot2 versions. His approach involved conditional logic in test code to handle differences in label access, as well as refactoring deprecated 'size' aesthetics to use 'linewidth.' By consolidating these changes, Tahv enhanced test robustness and reduced maintenance overhead, demonstrating depth in data visualization, package maintenance, and R development while stabilizing outputs across diverse environments.