Your Vibes Are Not an Agent Eval

Do you really know what you&rsquo;re doing? You swapped a model, you tuned an agentic workflow, you had the agent rewrite a chunk of a system prompt. You added a skill. Now the output feels sharper. Is that feeling a measurement? No, it&rsquo;s an impression. This is when the vibes start seeping into your agentic engineering world view. How Impressions Fail A subjective assessment isn&rsquo;t…