codexplugin
T

Tdd

by mxyhi

Skillcoding422 stars

Test-driven development with red-green-refactor vertical slices through public interfaces

Install now

$ npx codex-marketplace add mxyhi/ok-skills/tdd --skill

About

Test-driven development with red-green-refactor vertical slices through public interfaces

Tdd is a codex skill — a focused instruction set the agent loads when you need specialized coding help. Skills are lighter than full plugins and install with the --skill flag.

Source package path: mxyhi/ok-skills/tdd on GitHub (mxyhi/ok-skills).

Key features

  • Specialized agent instructions for coding tasks
  • Lighter than a full plugin — focused playbook the agent loads on demand
  • Install with the --skill flag via npx
  • Ideal when you want Tdd expertise without a full integration

How to install

  1. 01

    Copy the install command

    Use the command on this page — it includes the correct --skill flag for this skill.

  2. 02

    Run it in your project terminal

    Execute the command from the directory where you use Codex, not necessarily your home folder.

  3. 03

    Restart or reload Codex

    Restart the Codex CLI or reload your IDE window so the new extension is picked up.

  4. 04

    Try an example prompt

    Ask Codex something related to Tdd to confirm the skill is active.

Example prompts

Try these after installing to confirm Tdd is working.

> Add checkout validation using TDD — one failing test at a time, public API only
> Refactor this module with red-green-refactor and keep tests behavior-focused
> Write the first tracer-bullet test for the new export endpoint before implementation

Requirements

  • Node.js 18 or newer with npx available
  • Codex CLI or IDE extension installed and signed in
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