A few weeks ago I wrote about building a reproducible test harness for comparing free AI coding models before you commit . That harness answers one question: which model should I use? It does not answer the harder follow-up: once a model generates a patch for my real codebase, when is it safe to merge? This week there was a great discussion on DEV about "understanding over origin" — the idea that it doesn't matter whether code came from a human or a model, only whether someone actuall...