qmk-keychron-q3-colemak-dh/keyboards/vial_example/vial_rp2040/keymaps/vial/vial.json

{
  "matrix": {
    "rows": 2,
    "cols": 2
  },
  "layouts": {
    "keymap": [
      [
        "0,0",
        "0,1"
      ],
      [
        "1,0",
        "1,1"
      ]
    ]
  }
}