Oh this is very exciting! I do have a request, though—I want to list all file extensions an application can open, specifically so I can use this to ensure xcode isn't the default for anything but xcode-specific files.

Have an idea of how I would do this already, give me until the end of the week. To be clear, an interface like this?

Infat list [--identifier] [--application] Where identifier and application are mutually exclusive, and application lists the openers it is capable of opening by default? Merging the application flag for simplicities sake, so either returns a list with both their possibilities *and* the assigned apps.

Thoughts?