What is millnautilus?

Millnautilus is a file explorer for Linux desktops built with GTK4 and libadwaita, and its README is written in Italian. It is inspired by GNOME's Nautilus file manager, but instead of showing one folder at a time, it uses a Miller column layout, meaning folders open side by side in columns, so clicking into a subfolder slides a new column into view next to the one you came from. The sidebar mirrors what you would expect from a typical Linux file manager: your Home folder and other standard XDG folders, the trash, the wider file system, connected disks and volumes, network mounts, and the ability to connect to SFTP or SMB servers. It also shares bookmarks with Nautilus, reading and writing the same bookmarks file so favorites stay in sync between the two apps. A right-hand panel can toggle between a preview mode, which shows images, text file contents, and system-generated thumbnails for PDFs and documents, and an information mode showing file type, size, date, permissions, owner, path, and item count. Standard file operations are supported: copy, cut, paste, rename, move to trash, create new folder, open with, and drag and drop between columns, where dropping a file moves it by default. Hidden files can be toggled with a keyboard shortcut, and other shortcuts cover common actions like rename, reload, and quit. The app is written in Python and requires GTK 4.10 or newer plus libadwaita 1.5 or newer, with install commands provided for Debian, Ubuntu, Fedora, and Arch. It can be launched directly with a Python command or installed into the applications menu via a desktop file. It also exposes the standard FileManager1 D-Bus interface, letting other apps like GNOME Shell or web browsers ask it to show or select a specific file. The README does not mention a software license.