I’m using Claude code dynamic workflow like this. I tell Fable to use a workflow. He is the planner, orchestrator and reviewer. Opus agents are implementers. Works unbelievably well.
Per the OP's technique, I'll use Fable for intensive planning moments, then switch back to opus when things are going well.
Use a workflow to implement this. You (Fable) are the orchestrator, planner and reviewer. Opus agents are implementers.
That's all there's to it. it will create the dynamic workflow - has a nice interface native to Claude Code - and do all the coordination to deliver what you asked.