---
title: Rule Title Here
impact: CRITICAL|HIGH|MEDIUM-HIGH|MEDIUM|LOW-MEDIUM|LOW
impactDescription: Quantified impact, e.g., "2-10× improvement", "prevents silent failures"
tags: category-prefix, technique, related-concepts
---

## Rule Title Here

1-3 sentences explaining WHY this matters for test quality, reliability, or maintainability.

**Incorrect (what's wrong):**

```ruby
# Bad example - production-realistic, not strawman
```

**Correct (what's right):**

```ruby
# Good example - minimal diff from incorrect
```

**When NOT to use this pattern:**
- Exception 1
- Exception 2

Reference: [Reference Title](URL)
