During May 2025, contributed to the xkcoding/md repository by addressing a nuanced bug in the getDateFilename utility function. The work focused on improving file extension extraction for filenames containing multiple dots, ensuring that the generated filename consistently uses the correct suffix by selecting the last dot-separated segment. This fix enhanced the reliability of file-naming logic and reduced the risk of downstream processing errors caused by misnamed files. The solution involved robust string parsing and careful handling of edge cases, all implemented in TypeScript with an emphasis on utility function correctness and code clarity. No new features were released during this period.