Worked on improving the reliability of command-line parsing in the dotnet/command-line-api repository by addressing a bug in root command detection. Focused on refining the logic that distinguishes between command names and option values, replacing a heuristic based on Path.GetFileName with an exact match against the command name. This adjustment prevented false positives when the first argument resembled a command name, ensuring more accurate parsing. Collaborated with other contributors to consolidate robust parsing logic, including handling edge cases where arguments matched the executable path. Utilized C# programming, command line parsing techniques, and unit testing to deliver a targeted and maintainable fix.