Does this skill help with code refactoring?

Yes, the 'Refactor' phase is a core part of the workflow. After the tests turn green, the skill focuses on improving code structure and clarity while ensuring tests remain passing.

What if my project currently has no tests?

The skill includes a policy to first add a minimal test harness and a failing test case before proceeding with any functional code changes.

How does the skill handle type errors?

The skill follows a strict typecheck policy where types must always pass. It will fix or revert changes if they introduce new type errors, rather than ignoring pre-existing ones.

Can I use this skill with Bun's native test runner?

No, this skill is explicitly configured for Vitest. It contains non-negotiable instructions to avoid bun:test imports and APIs to ensure compatibility with the project's testing infrastructure.

TDD Red-Green-Refactor

Name: TDD Red-Green-Refactor
Author: skillrecordings

byskillrecordings

Security & Testing

Enforces a strict Test-Driven Development workflow using Vitest to ensure every code change is validated by failing tests first.

About

The TDD Red-Green-Refactor skill optimizes Claude Code for high-integrity software development by mandating a strict test-first methodology. It guides the AI agent to identify minimal observable behaviors, write failing Vitest cases, implement the smallest possible fix to achieve a 'green' state, and perform safe refactoring. This skill is particularly critical for maintaining complex codebases where regressions must be avoided, specifically enforcing the use of Vitest over other runners like bun:test to maintain environment consistency and reliability.

Key Features

Native Vitest integration with specific mocking patterns
Strict Red-Green-Refactor workflow enforcement
Comprehensive test reporting including command outputs and results
Automated failing test generation for new requirements
0 GitHub stars
Minimalist code implementation strategy to reduce technical debt

Use Cases

Debugging complex issues by reproducing them with a failing test first
Implementing new business logic with guaranteed test coverage
Refactoring legacy code structures while ensuring behavioral parity

About

Key Features

Native Vitest integration with specific mocking patterns
Strict Red-Green-Refactor workflow enforcement
Comprehensive test reporting including command outputs and results
Automated failing test generation for new requirements
0 GitHub stars
Minimalist code implementation strategy to reduce technical debt

Use Cases

Debugging complex issues by reproducing them with a failing test first
Implementing new business logic with guaranteed test coverage
Refactoring legacy code structures while ensuring behavioral parity