Stop Guessing – Use Golden Datasets for Prompt Evals

Quick Tip originally published on lukaswalter.dev . At some point, you will end up doing some form of prompt engineering. And often, it starts with vibes. You change a word or a phrase, add a little here, remove a little there, test it once, and it seems better. So you ship it. Then the next day, users complain that the quality of the answers got worse. The Problem: Prompt Regressions Prompts are fragile. A minor tweak, a new example, or even a model update, like switching to a newer version, ca