qmk_firmware/keyboards/xiudi/xd004/info.json

{
    "keyboard_name": "XD004", 
    "manufacturer": "XIUDI",
    "maintainer": "qmk", 
    "usb": {
        "vid": "0x7844",
        "pid": "0x0404",
        "device_version": "0.0.1"
    },
    "layouts": {
        "LAYOUT_all": {
            "layout": [{"label":"L", "x":0, "y":0}, {"label":"O", "x":1, "y":0}, {"label":"V", "x":2, "y":0}, {"label":"E", "x":3, "y":0}]
        }
    }
}