# Invalid Agent Skill

> Use when testing invalid agent validation

- Skill: `agent-sh/invalid-agent-skill` (Agent Skill)
- Install (CLI): `npx skillmds@latest add agent-sh/invalid-agent-skill`
- Raw SKILL.md: https://api.skillmd.com/api/skills/agent-sh/invalid-agent-skill/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: agent-sh (https://skillmd.com/u/agent-sh)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/agent-sh/invalid-agent-skill

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This skill has an invalid agent type.
Agent must be a built-in (Explore, Plan, general-purpose) or a custom kebab-case name.
Invalid_Agent is rejected because underscores are not allowed; use hyphens for kebab-case format.