Proof 01 · obeys law 03
What the keyboard actually sends
key is what the layout produced. code is which physical switch closed. On a French keyboard the key labelled A reports key: "q" and code: "KeyA", so a shortcut bound to one of them moves when someone changes layout and the other one stays put. Terminal emulators care about this at protocol depth. There is nothing here to click.
Tab to this panel, then press any key. Tap here, or the button below, to bring up your keyboard.
Tab and Escape are never intercepted; they are how you leave. The arrows, Space, Home, End and PageUp/Down are intercepted while this panel has focus, because otherwise the page scrolls out from under you.
Law 03
A shortcut announces itself, and never steals.
Discoverable without documentation. Never overrides a browser or screen-reader binding. Chords time out and say so.