A prompt edit can change a business workflow even when the code stays untouched. Treat that wording change as a release worth reviewing. An apparently small instruction may alter routing, evidence selection, or the tone of a customer commitment without making the difference obvious. State the intended behavior change, then version the prompt together with the relevant configuration, examples, and surrounding context it depends on. Compare cases where old and new versions disagree. Inspect changed decisions and their reasons instead of relying only on an aggregate score. Roll out with a known return path and a rollback configuration. Approval of an earlier version should not silently cover different behavior. Original article explainer. AI-assisted conceptual illustration and neural narration; original synthesized music. Not a human recording or customer result.