pulp-cli supports a variety of pulpcore plugins, but currently doesn't have a way to limit the CLI to the ones that are actually installed.

I am not sure whether querying the API before doing anything (including tab completion) is a good idea, but having a way to list plugins that shall be enabled (or disabled, I don't care too much), would be a good middle ground

That way Katello could deploy a config (after #290 is done) where we match the CLI plugins and the Server plugins :)