Prompt Master: One Skill for 18+ AI Tools

Free open-source Claude Code skill that generates optimized prompts for Claude, ChatGPT, Cursor, Midjourney, o3, Bolt, v0, ElevenLabs and more.

Prompt Master — a Claude Code skill for generating optimized prompts for any AI tool

Prompt Master banner from the official GitHub repository.

Claude Code — Anthropic's agentic coding tool for the terminal

Claude Code is the runtime that powers Prompt Master.

Official Anthropic webinar demonstrating Claude Code end-to-end.

Writing good prompts is half the battle with AI tools. The Prompt Master skill for Claude Code takes a different approach: instead of learning each tool's prompt format yourself, you describe what you want and it generates an optimized prompt tailored to the specific AI tool you are targeting.

What it does

Prompt Master is a single Claude Code skill that understands the prompt formats and best practices for over 18 AI tools. You tell it what you need — an image, a code refactor, a voice clone, a UI component — and which tool you plan to use. It produces a prompt designed to get the best results from that specific tool.

Supported tools include Claude, ChatGPT, Cursor, Midjourney, o3, Bolt, v0, ElevenLabs, and more. The full list is in the repository README.

How to install

Like any Claude Code skill, installation is a single file copy. Grab the skill file from the GitHub repository and place it in your Claude Code commands directory. No MCP server, no API keys, no configuration.

Once installed, invoke it from Claude Code by describing the task and specifying which AI tool you want the prompt for.

Why this is useful

Each AI tool has its own quirks. Midjourney responds well to specific aesthetic keywords and aspect ratio flags. Cursor benefits from explicit file-scoping instructions. ElevenLabs needs precise voice parameter descriptions. Learning these conventions for every tool takes time.

Prompt Master encodes these conventions so you do not have to memorize them. It acts as a translation layer between your intent and each tool's expected input format.

Open source

The entire skill is open source under a permissive license. You can read the code, modify the prompt templates, and add support for new tools. Contributions are welcome on GitHub.

Managing skills with Claude Grimoire

As the Claude Code skill ecosystem grows, keeping track of installed skills becomes its own task. Claude Grimoire gives you a visual interface to organize skills like Prompt Master alongside your commands, agents, and pipelines — all from one place.

Sources