Your agent picks one of two options. Can you test that choice? There's a moment in almost every agent loop where two options are both defensible and one of them has to win. Two migration plans. Two refactors. Two diagnoses. Two vendors. Two drafts. You put both in the prompt, ask for a pick, and get back something confident. Then you ship it, and you have no idea whether that choice was well-founded or whether the model just happened to prefer the second thing it read. I've been bui...