I had learnt that trick, so now I explicitly disallow Fable subagents.

Yesterday, I wanted to review a complex piece after a large refactoring, and requested a review plan beforehand. The first step was 8 agents + one more to verify the findings (all Fable). Looks good, approved.

The verification step turned into an attempt to throw a party with 41 Fable verifiers.

It will find a way.