Matthew Supernaw enhanced the NOAA-FIMS/FIMS repository by strengthening error handling in the C++ interface base, specifically within the ParameterVector constructor. He implemented input size validation to ensure that undersized inputs trigger an invalid_argument exception, effectively preventing out-of-bounds access and improving API safety for downstream components. To verify this behavior, he developed an automated test that checks for the invalid input size condition. His work, focused on C++ development and robust error handling, contributed to the overall stability and reliability of the software. Additionally, his experience with R package development informed his approach to maintaining high code quality standards.