# Creating Skills

> Claude/Codex skill by [@obra](https://omgskills.com/library/obra/index.md) · 41 stars · Updated 2025-10-09

TDD for process documentation - test with subagents before writing, iterate until bulletproof

## Install

```sh
git clone https://github.com/obra/clank /tmp/clank && ln -s /tmp/clank/skills/meta/creating-skills ~/.claude/skills/Creating Skills
```

## From README

Creating Skills Overview Creating skills IS Test-Driven Development applied to process documentation. You write test cases (pressure scenarios with subagents), watch them fail (baseline behavior), write the skill (documentation), watch tests pass (agents comply), and refactor (close loopholes). Core principle: If you didn't watch an agent fail without the skill, you don't know if the skill teaches the right thing. See skills/testing/test-driven-development for the fundamental RED-GREEN-REFACTOR cycle. This skill adapts TDD to documentation. What is a Skill? A skill is a reference guide for proven techniques, patterns, or tools. Skills help future Claude instances find and apply effective approaches.

## Links

- HTML page: https://omgskills.com/skills/obra/clank/creating-skills/
- GitHub: https://github.com/obra/clank
- Author: [@obra](https://omgskills.com/library/obra/index.md)

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