# 20a Userpromptexpansion

> Used by probe 20 to trigger validation rejection on Cowork by including UserPromptExpansion in hooks.

- Skill: `kazukinagata/20a-userpromptexpansion` (Agent Skill)
- Install (CLI): `npx skillmds@latest add kazukinagata/20a-userpromptexpansion`
- Raw SKILL.md: https://api.skillmd.com/api/skills/kazukinagata/20a-userpromptexpansion/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: kazukinagata (https://skillmd.com/u/kazukinagata)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/kazukinagata/20a-userpromptexpansion

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# 20a-userpromptexpansion

このスキルは UserPromptExpansion event を hooks に含めており、Cowork ではプラグイン全体の validation 拒否を狙います。CLI ではおそらく通る（baseline）。