os.path.join (folder, filename) ensures the path is correct for the system. On Windows, it uses backslashes (reports\summary.txt); on Linux and macOS it uses forward slashes (reports/summary.txt).

Copilot is almost everywhere on Windows 11. It’s on the context menu, inside apps like Paint, Notepad, and even Word or PowerPoint. It’s also coming to the taskbar, but that isn’t enough for Microsoft ...