RTK TDD Workflow

Enforce Red-Green-Refactor for all RTK filter development.

The Loop

1. RED   — Write failing test with real fixture
2. GREEN — Implement minimum code to pass
3. REFACTOR — Clean up, verify still passing
4. SAVINGS — Verify ≥60% token reduction
5. SNAPSHOT — Lock output format with insta

Step 1: Real Fixture First

Never write synthetic test data. Capture real command output: