Second Opinions
Spawn independent agents on the same ambiguous call; agreement builds confidence, divergence maps the real decision.
On genuinely ambiguous calls — a schema shape, whether a migration is reversible, which of two designs will age better — spawn two or three Manager agents on the same question independently and compare answers. Agreement raises confidence; divergence is even more useful, because where they disagree is exactly the decision you actually have to make.
Antigravity makes the panel genuinely diverse: run one agent on Gemini 3 Pro and one on a Claude model. Different model families have different failure modes; their overlap is stronger evidence than one model saying the same thing twice.
Don't use panels for execution. Three agents writing the same feature is waste, not robustness. Second opinions belong at decision points, on calls where being wrong is expensive.