Worked on the dotnet/sdk repository to improve the reliability of command-line output during JSON piping scenarios. Addressed a bug where launch settings messages polluted standard output, which could corrupt JSON output when redirecting to files. The solution involved redirecting diagnostic messages to standard error using C# and refactoring logging to ensure consistency across RunCommand.cs and SolutionAndProjectUtility.cs. Enhanced unit testing by updating assertions to verify correct output streams and expanded test coverage to reinforce CI/CD stability. Focused on backend development and IO redirection, these changes reduced downstream parsing errors and improved the robustness of automated workflows in the build pipeline.