mas-cli/mas ? reverse-engineered prompt

Build me a macOS command line app that lets me control the Mac App Store from Terminal for scripting and automation.

I want it to search for apps, show details for an app, list what is installed, check what is out of date, install apps by ID, update apps, uninstall apps, and open App Store pages. It should also support signing out, and have a simple way to get free apps or install purchased ones. Make the output clean and easy to read, with JSON output where it makes sense so I can pipe it into other tools.

It should feel like a real Mac utility, work well on modern macOS, and include helpful help text and command names that are easy to remember. If you need to look up current Apple docs or command line behavior online, go ahead.