> Github ask you to confirm the repo name before deleting by typing it into a text field. User looks at what the repo name is and types it without thinking. Or, like lazy me, mark and drag the displayed name into the field, so you don't even have to type.

Pretty easy to solve this sort of stuff with timers: "Sure, the repo will be deleted in <timer>. Press here to abort: <button>."

Or have the timers on the backend and just show the user an undo button.