Agent skill

TDD

테스트 주도 개발 - 테스트 먼저 작성 후 구현. An agent skill from jh941213/my-cc-harness.

No licenceAuto-check: notesTesting & QA

Install TDD

skills CLI

$ npx skills add jh941213/my-cc-harness --skill tdd -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install jh941213/my-cc-harness tdd --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/jh941213/my-cc-harness.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/tdd .claude/skills/tdd && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "tdd" agent skill from https://github.com/jh941213/my-cc-harness/tree/main/skills/tdd into .claude/skills/tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/jh941213/my-cc-harness/tree/main/skills/tdd

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add jh941213/my-cc-harness --skill tdd -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install jh941213/my-cc-harness tdd --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jh941213/my-cc-harness.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/tdd .agents/skills/tdd && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "tdd" agent skill from https://github.com/jh941213/my-cc-harness/tree/main/skills/tdd into .agents/skills/tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add jh941213/my-cc-harness --skill tdd -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install jh941213/my-cc-harness tdd --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jh941213/my-cc-harness.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/tdd .cursor/skills/tdd && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "tdd" agent skill from https://github.com/jh941213/my-cc-harness/tree/main/skills/tdd into .cursor/skills/tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/jh941213/my-cc-harness.git --path skills/tdd

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add jh941213/my-cc-harness --skill tdd -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install jh941213/my-cc-harness tdd --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jh941213/my-cc-harness.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/tdd .gemini/skills/tdd && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "tdd" agent skill from https://github.com/jh941213/my-cc-harness/tree/main/skills/tdd into .gemini/skills/tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install jh941213/my-cc-harness tdd

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add jh941213/my-cc-harness --skill tdd -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/jh941213/my-cc-harness.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/tdd .github/skills/tdd && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "tdd" agent skill from https://github.com/jh941213/my-cc-harness/tree/main/skills/tdd into .github/skills/tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add jh941213/my-cc-harness --skill tdd -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install jh941213/my-cc-harness tdd --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/jh941213/my-cc-harness.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/tdd .opencode/skills/tdd && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "tdd" agent skill from https://github.com/jh941213/my-cc-harness/tree/main/skills/tdd into .opencode/skills/tdd/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tdd", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: tdd
GitHub stars: 126
Token cost: ~588 tokens
SKILL.md length: 151 words
Files: 1
Skills in repo: 62
Repo updated: Aug 3, 2026
First seen: Oct 7, 2026
Licence: None found

At a glance

테스트 주도 개발 - 테스트 먼저 작성 후 구현. An agent skill from jh941213/my-cc-harness.

Works in 6 steps: 인터페이스 정의 (SCAFFOLD) → 테스트 작성 (RED) → 실패 확인 (중요!) → …
Tasks that involve Test-driven development
SKILL.md covers TDD 사이클, Step 1: 인터페이스 정의 (SCAFFOLD), Step 2: 테스트 작성 (RED) and Step 3: 실패 확인 (중요!), plus 6 more sections
Calls npx, pytest and npm

What it does

TDD is an agent skill from jh941213/my-cc-harness. 테스트 주도 개발 - 테스트 먼저 작성 후 구현. 트리거: "TDD", "테스트 먼저", "테스트 주도", "RED-GREEN-REFACTOR". 안티-트리거: "구현 먼저", "테스트 나중에".

Its SKILL.md is about 590 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Testing & QA, covering Test-driven development and Unit testing. It works with Jest, Vitest and pytest.

When your agent uses it

Tasks that involve Test-driven development
Tasks that involve Unit testing

Example prompts

“RED-GREEN-REFACTOR”
“/tdd”

Requirements

Python 3
Node.js
Pre-approved tools (allowed-tools): Read, Write, Edit, Bash, Grep

Workflow steps

6 steps, taken from the step headings in SKILL.md.

인터페이스 정의 (SCAFFOLD)
테스트 작성 (RED)
실패 확인 (중요!)
최소 구현 (GREEN)
리팩토링 (REFACTOR)
반복 (REPEAT)

What it can do on your machine

Read from SKILL.md and the folder at commit e9210e2. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
- Read
- Write
- Edit
- Bash
- Grep
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- npx
- pytest
- npm
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use npx and npm, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

TDD loads about 588 tokens when it runs. Until then it costs about 28 tokens; SKILL.md has 151 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~28
When it runs · the whole SKILL.md, loaded when a task matches: ~588

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
```
allowed-tools: Read, Write, Edit, Bash, Grep
```

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Without a licence we can't republish the file, so here is its outline and opening line. It has 151 words (~588 tokens).

“테스트를 먼저 작성하고, 코드를 구현하는 TDD 방식을 적용합니다.”

— opening of SKILL.md by jh941213

name: tdd
allowed-tools: Read, Write, Edit, Bash, Grep
disable-model-invocation: false
user-invocable: true

Read the full SKILL.md on GitHub

Files

Just SKILL.md in skills/tdd of jh941213/my-cc-harness.

Open the folder on GitHubat commit e9210e2

Compare with similar skills

TDD next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

TDD compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
TDD this skilljh941213/my-cc-harness	126	—	~588	Automated safety check: Notes	None	2 mo ago
MoAI TDD Workflowmodu-ai/moai-adk	1.2k	—	~3.1k	Automated safety check: Pass	Apache-2.0	today
Test-Driven Development Enforcerzereight/gitlab-mcp	2k	1 repos	~904	Automated safety check: Pass	MIT	3 days ago
TDD Guidealirezarezvani/claude-skills	28k	—	~3.4k	Automated safety check: Pass	MIT	1 mo ago
TDD GuideLeoYeAI/openclaw-master-skills	2.2k	—	~1.4k	Automated safety check: Pass	MIT	2 mo ago
TDD Guideborghei/Claude-Skills	881	—	~1.7k	Automated safety check: Pass	MIT	yesterday

Similar skills

MoAI TDD Workflow
modu-ai/moai-adk
Drives test-first development through the RED, GREEN, REFACTOR cycle, with a config switch that selects between TDD and a DDD workflow for existing code.
1.2k GitHub stars~3.1k tokensUpdated today
Testing & QAAuto-check passed
Test-Driven Development Enforcer
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Enforces strict red-green-refactor, with a failing test first, the minimum code to pass it, then cleanup, and a quick reference for common test runners.
2k GitHub starsUsed in 1 repo~904 tokens
Testing & QAAuto-check passed
TDD Guide
alirezarezvani/claude-skills
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28k GitHub stars~3.4k tokensUpdated 1 mo ago
Testing & QAAuto-check passed
TDD Guide
LeoYeAI/openclaw-master-skills
Test-driven development skill for writing unit tests, generating test fixtures and mocks, analyzing coverage gaps, and guiding red-green-refactor workflows across Jest, Pytest, JUnit, Vitest, and…
2.2k GitHub stars~1.4k tokensUpdated 2 mo ago
Testing & QAAuto-check passed
TDD Guide
borghei/Claude-Skills
Guide red-green-refactor TDD with test generation, coverage-gap analysis, and multi- framework support.
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Questions about TDD

What does TDD do?

테스트 주도 개발 - 테스트 먼저 작성 후 구현. An agent skill from jh941213/my-cc-harness. TDD is an agent skill from jh941213/my-cc-harness. 테스트 주도 개발 - 테스트 먼저 작성 후 구현.

When should I use TDD?

TDD fits situations like: tasks that involve Test-driven development; tasks that involve Unit testing.

How do I install TDD in Claude Code?

Run `npx skills add jh941213/my-cc-harness --skill tdd -a claude-code`. Or copy the skill folder (skills/tdd in jh941213/my-cc-harness) into .claude/skills/tdd in your project. Claude Code loads it when a task matches its description.

How do I install TDD in Codex?

Run `npx skills add jh941213/my-cc-harness --skill tdd -a codex`. Or copy the skill folder (skills/tdd in jh941213/my-cc-harness) into .agents/skills/tdd in your project. Codex loads it when a task matches its description.

Can I use TDD in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jh941213/my-cc-harness --skill tdd -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tdd, .gemini/skills/tdd, .github/skills/tdd and .opencode/skills/tdd in your project.

What does TDD need to run?

Going by SKILL.md and its folder, TDD needs the command-line tools its instructions call (npx, pytest and npm). Our summary lists: Python 3; Node.js. Its frontmatter pre-approves these tools: Read, Write, Edit, Bash, Grep.

Does TDD access the network?

SKILL.md contains no URLs. Its commands use npx and npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is TDD safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does TDD use?

No licence was found for TDD or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does TDD use?

About 588 tokens (SKILL.md is roughly 2.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to TDD?

Skills that share tags, products or a category with TDD: MoAI TDD Workflow (modu-ai/moai-adk, 1.2k stars), Test-Driven Development Enforcer (zereight/gitlab-mcp, 2k stars), TDD Guide (alirezarezvani/claude-skills, 28k stars) and TDD Guide (LeoYeAI/openclaw-master-skills, 2.2k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains TDD?

jh941213 (a GitHub user) maintains it in jh941213/my-cc-harness, which has 126 GitHub stars. The repository holds 62 skills in this directory. The repository was last updated on August 3, 2026.

Source: jh941213/my-cc-harness on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

TDD

Install TDD

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

MoAI TDD Workflow

Test-Driven Development Enforcer

TDD Guide

TDD Guide

TDD Guide

TDD Guide

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Questions about TDD

Install TDD

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Files

Compare with similar skills

Similar skills

More from jh941213/my-cc-harness

Related

Questions about TDD