# Hello Prompt

> The simplest possible SKILL — `skill_mode=prompt` returns the body verbatim as the MCP tool's response. Useful for prompt fragments, onboarding messages, or fixed-format responses the host LLM should pass through.

- Skill: `acosmi/hello-prompt` (Agent Skill)
- Install (CLI): `npx skillmds@latest add acosmi/hello-prompt`
- Raw SKILL.md: https://api.skillmd.com/api/skills/acosmi/hello-prompt/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: acosmi (https://skillmd.com/u/acosmi)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/acosmi/hello-prompt

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# Hello, world!

You invoked the `hello_prompt` SKILL. This entire markdown body is
returned to the calling LLM verbatim as the MCP tool's text content.

## What happens next

- The calling LLM reads this body and decides what to do with it.
- No host-side LLM is invoked; the SKILL is a pure prompt fragment.
- For deterministic step composition, see `hello-tool/`.
- For sub-agent spawn, see `hello-agent/`.