Aliasr is a plugin for the Velocity minecraft server proxy.
It can add configurable aliases using RegEx.
Aliasr itself has one command: /aliasr
No permission is required for it to run, but if the executor has the aliasr.reload permission, the config (and so all aliases) get reloaded.
You can find the config file under plugins/aliasr/config.toml.
aliases = [
{ name = "switchserver", args = "(\\S*)", command = "server", commandArgs = "$1" }
]This will create a command /switchserver.
The command /server is gonna be an alias with the arguments of the first catch (which means the first argument, the server name) of RegEx.