Tdd Workflow

A straightforward reference for keeping TDD honest. It walks you through the RED-GREEN-REFACTOR cycle with the three laws, the AAA pattern for structuring tests, and clear rules for each phase (write failing test, minimal passing code, then refactor). The tables are dense with practical reminders like prioritizing happy path over edge cases and avoiding implementation testing. The anti-patterns section is the most useful part, calling out common mistakes like skipping the RED phase or writing tests after code. There's an interesting multi-agent pattern at the end for AI-assisted development. This works best as a quick lookup when you're tempted to cut corners or forget why you're writing tests first.

skills.sh installs: 290
GitHub stars: 33.2K
last updated: Aug 21, 2026

View on GitHub

Install

$ npx -y skills add davila7/claude-code-templates --skill tdd-workflow --agent claude-code

Installs into .claude/skills of the current project.

Files

TDD Workflow

Write tests first, code second.

1. The TDD Cycle

🔴 RED → Write failing test
    ↓
🟢 GREEN → Write minimal code to pass
    ↓
🔵 REFACTOR → Improve code quality
    ↓
   Repeat...

2. The Three Laws of TDD

Write production code only to make a failing test pass
Write only enough test to demonstrate failure
Write only enough code to make the test pass

3. RED Phase Principles

What to Write

Focus	Example
Behavior	"should add two numbers"
Edge cases	"should handle empty input"
Error states	"should throw for invalid data"

RED Phase Rules

Test must fail first
Test name describes expected behavior
One assertion per test (ideally)

4. GREEN Phase Principles

Minimum Code

Principle	Meaning
YAGNI	You Aren't Gonna Need It
Simplest thing	Write the minimum to pass
No optimization	Just make it work

GREEN Phase Rules

Don't write unneeded code
Don't optimize yet
Pass the test, nothing more

5. REFACTOR Phase Principles

What to Improve

SKILL.md on GitHub

Details

Repository: github.com/davila7/claude-code-templates
Categories: Testing & QA, Code Review & Quality, Automation & Workflows
First seen: Jun 3, 2026