nuclei-sdk/tools/scripts/nsdk_cli/configs/cpu/pico/n300.json

{
    "build_config": {
        "CPU_SERIES": "300"
    },
    "build_configs": {
        "rv32imafdcb": {"CORE":"n300fd", "ARCH_EXT":"_zba_zbb_zbc_zbs"}
    }
}