TDD

What it does

When your agent uses it

• Tasks that involve Test-driven development

Example prompts

• “/tdd”

Requirements

• Compatibility (from SKILL.md): cline, claude, opencode, amp, codex, gemini, cursor, pi

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

1. 1Red: Write a failing test that defines desired behavior
2. 2Green: Write minimal code to make the test pass
3. 3Refactor: Improve code quality while keeping tests green

What it can do on your machine

Read from SKILL.md and the folder at commit 62c9227. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • npm
  • pnpm

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md. Its commands use npm and pnpm, 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.

• Compatibility

  cline, claude, opencode, amp, codex, gemini, cursor, pi

  From compatibility in the SKILL.md frontmatter.

Context cost

TDD loads about 1.1k tokens when it runs. Until then it costs about 19 tokens; SKILL.md has 545 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~19

When it runs · the whole SKILL.md, loaded when a task matches

~1.1k

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

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

The full file from jellydn/my-ai-tools at commit 62c9227, republished under its MIT licence (© jellydn). 545 words, ~1,149 tokens.

name

tdd

description

Guide through the Red-Green-Refactor cycle for test-driven development

compatibility

cline, claude, opencode, amp, codex, gemini, cursor, pi

license

MIT

hint

Use when doing test-driven development with Red-Green-Refactor cycle

user-invocable

true

metadata.audience

all

metadata.workflow

testing

import { describe, it, expect } from "vitest";
import { functionName } from "./module";

describe("functionName", () => {
	it("should return formatted output when given valid input", () => {
		// Arrange - Setup test scenario
		const input = "test input";
		const expectedOutput = "expected output";

		// Act - Execute the unit under test
		const result = functionName(input);

		// Assert - Verify expected outcome
		expect(result).toBe(expectedOutput);
	});
});

© jellydn, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file in skills/tdd of jellydn/my-ai-tools.

• SKILL.md
• templates/test-template.md

Open the folder on GitHubat commit 62c9227