Most LLM failures in production aren’t random — they’re predictable.

I kept hitting broken JSON, silent failures, and outages that froze my entire app. Prompt engineering didn’t fix it.

So I built a control layer above the model — and took structured output reliability from 0% to 100% without changing a single prompt.The post [Prompt Engineering Isn’t Enough — I Built a Control Layer That Works in Production](https://towardsdatascience.com/prompt-engineering-isnt-enough-i-built-a-control-layer-that-works-in-production/) appeared first on [Towards Data Science](https://towardsdatascience.com).