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---
name: writing-skills
description: Use when creating new skills, editing existing skills, or verifying skills work before deployment.
---
# Writing Skills
## Overview
Writing skills IS Test-Driven Development applied to process documentation. Write pressure tests, watch agents fail, write the skill, watch them pass, close loopholes.
**Core principle:** If you did not watch an agent fail without the skill, you do not know if the skill teaches the right thing.
## TDD for Skills
| TDD Concept | Skill Creation |
|-------------|----------------|
| Test case | Pressure scenario with subagent |
| Production code | Skill document (SKILL.md) |
| RED | Agent violates rule without skill |
| GREEN | Agent complies with skill present |
| REFACTOR | Close loopholes |
## Skill Structure
- YAML frontmatter: `name` and `description` only
- Description: "Use when..." (triggering conditions only, never summarize workflow)
- Flat namespace, separate files only for heavy reference or reusable tools
## Tool Use
Meta-skill for creating new skills within the methodology.
