Make the AI Write the Test First

The fastest way to break a working app is to ask an AI to add a feature to it. The agent fixes one thing and quietly breaks two others, and you find out from a customer.

Automated tests are how professionals stop this. A test is a small program that checks one behaviour and fails loudly when it changes.

The workflow

1. Turn an acceptance criterion into a test. Take a line from your spec: "Given a paid invoice, the Pay button is hidden."
2. Ask the AI to write only the test. Not the feature.
3. Run it and watch it fail. A test that has never failed has never proven anything....