Developed and integrated a new StderrError type into the flant/shell-operator repository to enhance error handling for shell commands emitting output on stderr. This feature introduced structured, typed access to stderr messages, allowing for clearer and more consistent error reporting throughout backend workflows. The implementation, delivered through two focused commits, refined the error handling workflow to ensure compatibility with existing patterns and improved overall usability. Utilizing Go for backend development, the work emphasized robust error handling and maintainability. These changes reduced troubleshooting time and increased reliability for operators managing workflows that depend on accurate interpretation of stderr output from shell commands.