# tdd

> Write code through a disciplined, BDD-framed Test-Driven Development loop: build a behavior test list, then drive each…

Write code through a disciplined, BDD-framed Test-Driven Development loop: build a behavior test list, then drive each behavior through red-green-refactor with an enforced observed-failure gate. Use when the user wants to implement, build, or write code test-first, "do TDD", follow "red-green-refactor", drive code from tests, choose the next test by the Transformation Priority Premise (TPP) or ZOMBIES ordering, or grow a feature behavior-by-behavior with tests leading. This skill writes and changes code; it does not produce a test plan document (use automated-test-planning, or manual-test-planning for a plan a person runs by hand), review or audit existing code (use code-review), restructure existing code outside a TDD loop (use refactor, or plan-a-change to plan a multi-module restructure), specify what a feature should do (use plan-a-feature), or find the root cause of a bug (use investigate). Runs its loop to completion without pausing for review; to review each behavior as it lands, use pairing.

- Type: Skill
- Made by: testdouble
- Category: Developer tools
- Formats: Skills
- Version: 181ce20
- Source: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd
- Page: https://pluginboard.ai/skills/tdd-testdouble

## Works with

- ChatGPT
- Claude
- Gemini
- GitHub Copilot
- Cursor
- Claude Code
- Codex
- Antigravity
- Gemini CLI
- Replit
- OpenClaw
- OpenCode
- Hermes Agent

## Install

### ChatGPT

In ChatGPT: Download the tdd folder and zip it, then Plugins → Skills → Create → Upload from your computer. Business and Enterprise plans.

View the folder on GitHub: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd

### Claude

In Claude (web or desktop): Download the tdd folder and zip the folder itself, then upload it in Customize → Skills.

View the folder on GitHub: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd

### Gemini

In Gemini: Download the tdd folder, then at gemini.google.com click Customize → Skills → Create → Upload and pick the folder (or a .zip of it).

View the folder on GitHub: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd

### GitHub Copilot

Run in your terminal:

```shell
npx -y degit testdouble/han/han-coding/skills/tdd ~/.copilot/skills/tdd
```

View the folder on GitHub: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd

### Cursor

Run in your terminal:

```shell
npx -y degit testdouble/han/han-coding/skills/tdd ~/.cursor/skills/tdd
```

View the folder on GitHub: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd

### Claude Code

Run in your terminal:

```shell
npx -y degit testdouble/han/han-coding/skills/tdd ~/.claude/skills/tdd
```

View the folder on GitHub: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd

Or all of Han Coding, in Claude Code:

```text
/plugin marketplace add testdouble/han
/plugin install han-coding@han
```

### Codex

Run in your terminal:

```shell
npx -y degit testdouble/han/han-coding/skills/tdd ~/.agents/skills/tdd
```

View the folder on GitHub: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd

### Antigravity

In Antigravity: Copy the tdd folder into ~/.gemini/config/skills (Antigravity app and IDE) or ~/.gemini/antigravity-cli/skills (Antigravity CLI).

View the folder on GitHub: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd

### Gemini CLI

Run in your terminal:

```shell
npx -y degit testdouble/han/han-coding/skills/tdd ~/.gemini/skills/tdd
```

View the folder on GitHub: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd

### Replit

Run in your terminal:

```shell
npx -y degit testdouble/han/han-coding/skills/tdd .agents/skills/tdd
```

View the folder on GitHub: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd

### OpenClaw

Run in your terminal:

```shell
npx -y degit testdouble/han/han-coding/skills/tdd ~/.openclaw/skills/tdd
```

View the folder on GitHub: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd

### OpenCode

Run in your terminal:

```shell
npx -y degit testdouble/han/han-coding/skills/tdd ~/.config/opencode/skills/tdd
```

View the folder on GitHub: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd

### Hermes Agent

Run in your terminal:

```shell
npx -y degit testdouble/han/han-coding/skills/tdd ~/.hermes/skills/tdd
```

View the folder on GitHub: https://github.com/testdouble/han/tree/HEAD/han-coding/skills/tdd

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From Pluginboard (https://pluginboard.ai).