Karabiner configuration for disabling the command keys

private.xml

<?xml version="1.0"?>
<root>
    <item>
        <name>Send Shift-Ctrl-F13 for Command Left</name>
        <identifier>private.send_shift_ctrl_f13_for_lcmd</identifier>
        <autogen>--KeyToKey-- KeyCode::COMMAND_L,
            KeyCode::F13, ModifierFlag::SHIFT_L
            | ModifierFlag::CONTROL_L
        </autogen>
    </item>
    <item>
        <name>Send Shift-Ctrl-F13 for Command Right</name>
        <identifier>private.send_shift_ctrl_f13_for_rcmd</identifier>
        <autogen>--KeyToKey-- KeyCode::COMMAND_R,
            KeyCode::F13, ModifierFlag::SHIFT_L
            | ModifierFlag::CONTROL_L
        </autogen>
    </item>
</root>