Prompt Master: A Claude Skill That Writes Better Prompts for Any AI Tool
If you’ve ever stared at a blank input field in ChatGPT or Claude, trying to craft the perfect prompt, you know the struggle. It’s not just about asking the right question—it’s about structure, context, and tone. And when you switch tools (say, from Claude to Midjourney), the prompt style flips entirely.
Enter Prompt Master, a Claude Skill that acts like a prompt-writing assistant. It doesn’t just spit out generic text—it analyzes what you need and builds precision prompts tailored to any AI tool. And it’s open source.
What It Does
Prompt Master is a custom skill (or system prompt) you load into Claude. When you give it a high-level goal like “write a marketing email for a new SaaS tool” or “generate a DALL-E prompt for a steampunk cat,” it returns a structured, ready-to-use prompt optimized for the specific model you’re targeting.
The key insight? It understands the quirks of different AI tools. A prompt that works well in Claude might fall flat in Gemini, and Midjourney needs completely different language. Prompt Master handles that translation.
Why It’s Cool
1. It’s not a wrapper—it’s a skill.
You don’t need a separate app or API key. You just load a system prompt into Claude, and suddenly Claude becomes a prompt engineer. That’s elegant.
2. It’s tool-aware.
You can say “write a prompt for Stable Diffusion” and get details like negative prompts, aspect ratios, and style modifiers. Switch to “write a prompt for ChatGPT as a code reviewer,” and it shifts to a role-playing, step-by-step reasoning style.
3. It saves mental overhead.
Instead of remembering prompt patterns for five different tools, you describe your goal once. Prompt Master fills in the blanks.
4. It’s open source.
The repo (https://github.com/nidhinjs/prompt-master) is clean, well-documented, and MIT licensed. You can tweak the skill, extend it, or just learn from how it structures prompts.
5. Real use cases:
- Marketers: build consistent brand prompts for copywriting bots
- Designers: generate precise image prompts without guesswork
- Developers: create debugging prompts that include stack traces and expected behavior
How to Try It
The repo has everything you need. Quick start:
Clone the repo:
git clone https://github.com/nidhinjs/prompt-master.gitRead the
README.md—it shows you how to load the skill into Claude (or any compatible system).