qmk_firmware/keyboards/keebwerk/nano_slider/info.json

{
    "keyboard_name": "nano. slider",
    "url": "",
    "maintainer": "qmk",
    "width": 4,
    "height": 3.25,
    "layouts": {
        "LAYOUT": {
            "layout": [
                {"x":0, "y":0},
                {"x":0, "y":1.25},
                {"x":1, "y":1.25},
                {"x":2, "y":1.25},
                {"x":0, "y":2.25},
                {"x":1, "y":2.25},
                {"x":2, "y":2.25},
                {"x":3, "y":1.25, "h":2}
            ]
        }
    }
}