qmk_firmware/keyboards/bastardkb/charybdis/3x6/blackpill/info.json

{
    "keyboard_name": "Charybdis Mini (3x6) Blackpill",
    "usb": {
        "device_version": "1.0.0"
    },
    "processor": "STM32F411",
    "bootloader": "stm32-dfu",
    "board": "BLACKPILL_STM32_F411"
}