Guide · Agent skill
How to use the Prompt Master agent skill for AI prompts
Updated · written with AI from the project's own documentation and checked against our catalogue data
Prompt Master is an agent skill, a set of instructions that an AI agent loads when a task matches it. When you explicitly ask an agent to write, fix, improve, or adapt a prompt for a specific AI tool, this skill makes the agent work as a prompt engineer and return one ready-to-paste prompt. This guide explains what the skill does, how to install it, how to trigger it, and where its limits are.
Prompt Masternidhinjs/prompt-master · MIT Download the skill Quick start
- 1Download the skill. Download the Prompt Master skill from this page as a ZIP file.
- 2Unzip the folder. Unzip the file and confirm the folder contains README.md and SKILL.md.
- 3Place it in your skills folder. Move the folder to ~/.claude/skills/ for personal use, or to the project's .claude/skills/ folder for one project.
- 4Or upload it in the Claude apps. In claude.ai, go to Sidebar, then Customize, then Skills, and choose Upload a Skill.
- 5Ask for a prompt by tool. Make a request that asks for a prompt and names the target tool, such as Midjourney, Cursor, or a video AI.
- 6Check the output. Review the single prompt block and the target note, and confirm any model-specific details against official documentation.
What the Prompt Master skill makes the agent do
When the skill is active, the agent takes your rough idea, identifies the AI tool the prompt is for, works out what you actually want, and returns a single prompt tuned to that tool. The skill's instructions say the output is one production-ready prompt, followed by a short note naming the target tool and explaining what was optimized and why.
The skill is scoped to prompt writing. Its description says it activates only when you explicitly ask for a prompt for a specific AI tool, such as an LLM, Cursor, Midjourney, an image AI, a video AI, or a coding agent. It does not activate for general conversation, coding tasks, document writing, or other non-prompt work.
- Identifies the target tool before writing the prompt
- Extracts the task, output format, constraints, and success criteria from your request
- Returns one copyable prompt block plus a one-sentence note on what was optimized
- Asks a clarifying question if the target tool is ambiguous
Install the Prompt Master skill from the ZIP
Download the skill from this page as a ZIP file and unzip it. The skill folder should contain the files README.md and SKILL.md. The SKILL.md file is the one that holds the skill's instructions.
You can install it in one of two places. For a personal setup, place the unzipped skill folder in ~/.claude/skills/. For a single project, place it in that project's .claude/skills/ folder. You can also upload the skill in the Claude apps, where the README gives the path as claude.ai, then Sidebar, then Customize, then Skills, then Upload a Skill.
- Personal install: ~/.claude/skills/
- Project install: the project's .claude/skills/ folder
- Claude apps: Customize → Skills → Upload a Skill (per the project README)
How to trigger the skill with natural requests
The skill activates when your request explicitly asks for prompt work and names a tool. You do not need special syntax. Say what you want a prompt to do and which tool it is for, in plain language.
Requests that do not name a target tool or do not ask for a prompt are outside the skill's scope. Expect the agent to ask which tool you mean before it writes a prompt for an ambiguous request.
- Write a prompt for Midjourney that generates a product photo on a plain background
- Fix this prompt so it works better in Cursor: [paste prompt]
- Adapt my video prompt for Runway
- Improve this image prompt for Stable Diffusion
Examples of what you get back
A typical request is a rough idea with a target tool. The skill turns it into a structured prompt for that tool. The exact wording depends on the tool and on how much detail you give. The skill's instructions say it asks for the output format, constraints, and success criteria when they matter, and it asks no more than three clarifying questions before it writes the prompt.
The skill's own guidance for Claude prompts favors clear, direct instructions, XML tags such as <context> and <task> for complex prompts, and positive instructions over long lists of prohibitions. Model names and settings change quickly, so the skill tells the agent to check details against official documentation and to say so when it cannot.
- Rough idea in: 'a logo for my bakery, something warm'
- Target named: Midjourney, Claude, Cursor, or another tool
- Out: one prompt block, a target line, and a short note on what was optimized
What the skill needs and how it runs
According to the skill's listing, it requires nothing beyond the agent that loads it. It does not run scripts and does not use the network. The skill is MIT licensed.
Because it runs no scripts and makes no network calls, the skill itself only supplies instructions to the agent. Any results still depend on the target tool and on the quality of your request, so check the prompt before you rely on it.
- Requires: nothing listed
- Runs scripts: no
- Uses network: no
- Licence: MIT
Tips for better results from Prompt Master
Name the target tool in your first message. This avoids a clarifying question and lets the skill tailor the prompt. Give the goal, the audience or use, and any must-have or must-avoid details. For model-specific settings, remember that the skill will say when details could not be verified against current documentation.
- Name the tool and the goal in the same message
- Paste any existing prompt you want fixed or adapted
- State output length or format if it matters
- Verify model names, settings, and product capabilities against the tool's official documentation before relying on them
What people use it for
- Writing a precise image prompt for Midjourney or Stable Diffusion from a rough description
- Fixing a vague coding-agent prompt for Cursor or Claude Code so it states scope and success criteria
- Adapting an existing prompt from one tool to another, such as a video prompt for Runway or Sora
- Turning a non-expert's idea into a structured prompt for an LLM with a clear output format
Frequently asked questions
Is the Prompt Master skill free?
The skill is licensed under MIT, as stated in the project's listing. The source does not list any price, so check the download page for any terms that apply to your use.
What do I need to run the Prompt Master skill?
The skill's listing says it requires nothing beyond the agent that loads it. It runs no scripts and uses no network, and you install it by placing its folder in a skills directory or uploading it in the Claude apps.
Where do I install a Claude agent skill?
For personal use, place the unzipped skill folder in ~/.claude/skills/. For one project, use that project's .claude/skills/ folder. In the Claude apps, use Customize, then Skills, then Upload a Skill.
Why does the skill not activate for my question?
It only activates when you explicitly ask for a prompt for a specific AI tool. It is designed to stay inactive for general conversation, coding tasks, and document writing, so ask for a prompt and name the tool.
Does Prompt Master guarantee better results?
No. The skill's listing says output still depends on the target tool and the quality of your request, so results are not guaranteed.
How does Prompt Master compare with writing prompts myself?
The skill gives you a tool-targeted starting prompt with a short note on what was optimized. It does not replace checking the prompt against the tool's official documentation, especially for current model names and settings, which the skill says it may not be able to verify.
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Our verdict
Prompt Master suits people who write prompts often for image, video, or coding AI tools, and developers who want tool-specific prompt templates for Claude or other LLMs. It is a poor fit if you need current model details you cannot verify yourself, or if you expect guaranteed results. For general writing or coding help, use an agent without this skill.
Download the skill