Evals are the new unit tests

If you ship code, you write tests. If you ship prompts, you should write evals. The shape is the same — and the practice is no longer optional.

What evals are

An eval is a test for a prompt. You give the model an input, ask it to produce an output, and check whether the output matches what you wanted. Run them in CI on every prompt change. Block deploys if regressions land.

Why teams skip them

Mostly because evals feel hand-rolled. Every team is inventing the same harness. We want to fix that.

Aurora ships with an eval framework wired to your CI. Every prompt change gets tested against a frozen dataset before the prompt can be promoted to production. No regressions land silently anymore.

How to start

Pick three prompts you ship. Write five eval inputs for each. Run them on every commit. You’ll be surprised how often something breaks — and how much sleep you get back.