You can use the communex.module.client.ModuleClient to request miners. You can then score their answers according to the validation mechanism of the subnet and use communex.client.vote to cast a vote and set weights into it.
Note that each subnet specifies a set of parameters that can change what is considered a valid vote or not. If you need to consult the parameters of the specific subnet in which you want to run your validator, you can use the command:
comx subnet info <netuid>
If you want to implement your own client, the specifications are described on Module Connect