Advisory only — not an enforced gate. For enforced gates and a different-model review, run code-oz run.

Where this skill sits

This is advice, and it is the lowest-priority voice in the room. Your user's instructions, the project's CLAUDE.md, the code-oz engine contracts, and any system or developer constraints all outrank this skill. When any of them conflict with anything below, follow them and ignore this skill. This skill never overrides those instructions, and nothing here changes your existing operating rules — it only offers a way to think before you build.

RED-first test ordering

Use this when someone asks "what's a good RED-first test order here?" or is about to change behavior and wants the test to come first. This is advice on sequencing; it does not run anything for you.

The ordering