One practice before Studio 4. It fits inside work you already have in front of you.

The experiment

Choose one real feature or change request this week. Do not start by asking AI for code. Fill in a Testability Review Card first:

  • Three behaviors worth verifying independently.
  • One test smell you noticed.
  • One design change that would make verification easier.
  • One AI exchange where the conversation improved the design.

Then go build it however you normally would. The card is not extra process — it is five minutes of looking before you leap, and you will find out quickly whether it changes what you build.

The micro-habit worth trying

Before asking AI for an implementation, ask what behavior must be independently verified.

It is a small question. It tends to change the answer you get back.

Where to capture it

Use the Testability Review Card in your Explorer Workbook — it appears in the Studio 3 section, and again under Reusable Field Artifacts near the back. It has space for the behavior to verify, the expected result, what one test should prove, what would make the test blurry, and the design boundary that suggests.

Bring your card to Studio 4.

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