qmk_firmware/keyboards/hhkb/ansi/32u4/keyboard.json

{
    "processor": "atmega32u4",
    "bootloader": "atmel-dfu",
    "features": {
        "bootmagic": true,
        "command": true,
        "console": true,
        "extrakey": true,
        "mousekey": true,
        "nkro": false
    }
}