In omp you can also have the advisor role, which is off by default, you can enable it with /advisor command. It acts as a model that reviews the default agent's work in the background.

I am omp pilled, but as the other comments say, any good harness lets you do this in one or the other way.

unrelated: all my homies use their claude subs with omp, and aside from sometimes having to rety the connections, it works, and nobody got banned (yet)