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test-driven-development

Test-driven development workflow (red → green → refactor) for features, bug fixes, and refactors.

Skill by vadimcomanescu

IndexedMIT★ 25
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Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/vadimcomanescu-test-driven-development

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Test-driven development workflow (red → green → refactor) for features, bug fixes, and refactors. Use when implementing behavior changes and you want to drive design via tests, prevent regressions, and keep code modular and well-factored.

Use cases: design, testing, productivity

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What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

Tools
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Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/test-driven-development

What's inside

Skill name
test-driven-development
Description
Test-driven development workflow (red → green → refactor) for features, bug fixes, and refactors. Use when implementing behavior changes and you want to drive design via tests, prevent regressions, and keep code modular and well-factored.
License
MIT
Instructions
28 lines in SKILL.md · view on GitHub

Files (3)

  • LICENSE.txt
  • SKILL.md
  • testing-anti-patterns.md · references/

SKILL.md (first lines)

# Test-Driven Development

Write the test first, then write the smallest change that makes it pass, then refactor safely.

## Core loop
1) **Red**: write a failing test that expresses the desired behavior.
2) **Green**: implement the minimum change to pass.
3) **Refactor**: improve structure while keeping tests green.

## Quick Start
- Start from the public interface (API, function, UI behavior), not private helpers.
- Prefer “behavioral” test names (what), not “implementation” names (how).
- When fixing bugs: reproduce with a test first.

## Guardrails
- Don’t over-mock: prefer integration at boundaries; mock only slow/flaky externals.
- Keep tests deterministic: control time, randomness, and network.
- If a test is hard to write, your design likely needs an interface seam.

## Red/Green/Refactor checklist
- Red: test fails for the right reason (not setup errors).
- Green: smallest change to pass, no extra behavior.
- Refactor: improve structure without changing behavior or tests.

## References
- Common anti-patterns: `references/testing-anti-patterns.md`

From vadimcomanescu/codex-skills, MIT.

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Signals

Stars
25
Forks
8
Open issues
2
Last commit (this folder)
Jan 19, 2026 (9 months ago)

From GitHub (fetched Oct 24, 2026).

Details

License
MIT
Repository
github.com/vadimcomanescu/codex-skills
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
GitHubgithub-graphql

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test-driven-development skill. Agent Mart. https://agentmart.dev/skills/vadimcomanescu-test-driven-development (last updated 2026-10-24)