Skills, in their native habitat.

Use Arena for heterogeneous independent design and cross-review, second opinions, code/bug/plan reviews, and evidence-based analysis. Cues: 用 arena, 讨论一下, 审核一下, 交叉审核, 第二意见, 完全体...

Use when comparing non-trivial options or making a design/architecture/experiment/product/research/strategy decision with real tradeoffs, unclear criteria, or commitment risk, and...