You don't ever need to use the configuration files, netlink on linux or the cross platform interface documented at https://www.wireguard.com/xplatform/ https://

You don't ever need to use the configuration files, netlink on linux or the cross platform interface documented at https://www.wireguard.com/xplatform/ https://www.wireguard.com/xplatform/ mean you can write your own tooling around an existing inteface. The cryptokey routing is pretty fundamental to wireguard, I'm not sure you could have one without the other.