/tdd

Test-driven development workflow with red-green-refactor cycle

# Test-Driven Development (TDD)

## Overview

Write the test first. Watch it fail. Write minimal code to pass.

**Core principle:** If you didn't watch the test fail, you don't know if it tests the right thing.

**When to use:** Only for complex logic where bugs are likely, or when user explicitly requests tests.

## When to Use

**Use TDD when:**

1. **User explicitly requests tests**
2. **Complex logic where bugs are likely:**
   - Complex algorithms
   - Business logic with edge cases
   - Data transformations
   - Critical paths that could break silently

**Skip TDD for:**

- ❌ UI compo...