Agent Skills · 10 Nov 2026

test-driven-development: Agent Skill

In this week's ranking: #421

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What it does

Drives development with tests using the red-green-refactor loop.

What you need

Read the documented requirements before installation.

Who it is for

The README names these assistants: Claude Code, Codex, Gemini CLI, Cursor, Windsurf, OpenCode.

Setup and use

Step 1. Install the instructions
Use the exact command documented by the project.
```
npx skills add addyosmani/agent-skills            # install all 25 skills
```
The instructions are available to your assistant.

Check that it works

Follow the example and check the result against the documented behavior.

Features explained

Discover the Stack First

The TDD cycle is universal; the commands are not.

RED Write a Failing Test

Write the test first.

The Prove-It Pattern Bug Fixes

When a bug is reported, do not start by trying to fix it.

Next steps

Continue with the complete project documentation.

Limits

Review the instructions before granting access to your project.

Security check

Ranking history

First seen 2026-10-30; last seen 2026-11-11; best position #409; latest stars 115297. Dates show actual observations; missing ranks are not interpolated.

More skills for Coding

Numbers and date

Observed on 11 Nov 2026. GitHub counts apply to the repository; skills.sh counts apply to this skill.

GitHub stars: 115297
Star growth over seven days: Not available: seven-day history is still being collected
skills.sh total installs: 72066
skills.sh installs in 24 hours: 668
License: MIT
Last commit: 2026-11-01T19:24:49Z