Originally published on AIdeazz — cross-posted here with canonical link. I shipped a silent failure. My first production AI agent, a simple lead qualification bot for WhatsApp, passed all 27 unit tests.
Source: [Dev.to](https://dev.to/elenarevicheva/131-tests-4-layers-0003run-why-i-built-my-ai-agent-eval-harness-first-15o7)