Run time logic for excluding a subagent from a parent agent. #2015

Is your feature request related to a problem? Please describe.
We have an onboarding agent that is highly optimized for the initial interaction with new users. It would be great if we can have conditional inclusion of the sub agent so that outside of the initial interaction we know for certain it will not be transferred to. The condition can be a field in the session state of the user.

Describe alternatives you've considered
We are currently doing it via prompt engineering but a deterministic way to do this would be appreciated.