During January 2025, Kopperud focused on enhancing the reliability of stochastic character map sampling in the revbayes/revbayes repository. He addressed a bug in the C++ codebase that previously allowed excluded sites to be inadvertently included during phylogenetic substitution model analyses. By refining the sampling logic, he ensured that only relevant sites were considered, thereby improving the accuracy of downstream phylogenetic inferences. Kopperud applied targeted statistical modeling techniques and implemented comprehensive tests to validate the fix, emphasizing code traceability and stability. This work demonstrated a careful approach to maintaining analytical rigor in computational phylogenetics using C++ and statistical modeling.