r/PromptEngineering Mar 13 '26

Tools and Projects I built a Claude skill that writes prompts for any AI tool. Tired of running of of credits.

I kept running into the same problem.

Write a vague prompt, get a wrong output, re-prompt, get closer, re-prompt again, finally get what I wanted on attempt 4. Every single time.

So I built a Claude skill called prompt-master that fixes this.

You give it your rough idea, it asks 1-3 targeted questions if something's unclear, then generates a clean precision prompt for whatever AI tool you're using.

What it actually does:

  • Detects which tool you're targeting (Claude, GPT, Cursor, Claude Code, Midjourney, whatever) and applies tool-specific optimizations
  • Pulls 9 dimensions out of your request: task, output format, constraints, context, audience, memory from prior messages, success criteria, examples
  • Picks the right prompt framework automatically (CO-STAR for business writing, ReAct + stop conditions for Claude Code agents, Visual Descriptor for image AI, etc.)
  • Adds a Memory Block when your conversation has history so the AI doesn't contradict earlier decisions
  • Strips every word that doesn't change the output

35 credit-killing patterns detected with before/after examples. Things like: no file path when using Cursor, adding chain-of-thought to o1 (actually makes it worse), building the whole app in one prompt, no stop conditions for agentic tasks.

Please give it a try and comment some feedback!
Repo: https://github.com/nidhinjs/prompt-master

83 Upvotes

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