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Prompt Master

Prompt Master is an agent skill (a SKILL.md file) from nidhinjs/prompt-master. It generates optimized prompts for AI tools. It works with Claude Code, Codex, Cursor and GitHub Copilot and has 15,078 GitHub stars. Install it by copying the skill folder into your agent's skills directory.

github.com/nidhinjs/prompt-master (opens in a new tab)

Data as of from the GitHub API; description from the skill's SKILL.md. Report an error

View on GitHub (opens in a new tab)

Add this skill

Claude

Claude Code loads skills from ~/.claude/skills/ (all projects) or .claude/skills/ (one project):

git clone --depth 1 https://github.com/nidhinjs/prompt-master.git
cp -r prompt-master ~/.claude/skills/prompt-master   # personal, or .claude/skills in a project

In the Claude apps, zip the prompt-master folder and upload it under Customize > Skills > + > Upload a skill (code execution must be on).

ChatGPT / Codex

Codex reads skills from .agents/skills/ in a repo or ~/.agents/skills/ for every project:

git clone --depth 1 https://github.com/nidhinjs/prompt-master.git
cp -r prompt-master .agents/skills/prompt-master   # repo; ~/.agents/skills for all projects

Standalone skills also load in the ChatGPT desktop app.

Cursor

Cursor loads skills from .cursor/skills/ (or ~/.cursor/skills/) and also reads .claude/skills/:

git clone --depth 1 https://github.com/nidhinjs/prompt-master.git
cp -r prompt-master .cursor/skills/prompt-master   # project; ~/.cursor/skills for all projects

Source (checked Oct 7, 2026): code.claude.com/docs/en/skills (opens in a new tab), support.claude.com/en/articles/12512180-using-skills-in-claude (opens in a new tab), learn.chatgpt.com/docs/build-skills (opens in a new tab), cursor.com/docs/context/skills (opens in a new tab)

What this skill does

Generates optimized prompts for AI tools. Activates only when the user explicitly asks to write, fix, improve, or adapt a prompt for a specific AI tool (LLM, Cursor, Midjourney, image AI, video AI, coding agents, etc.). Does not activate for general conversation, coding tasks, document writing, or other non-prompt-engineering work. When generating or improving prompts, operate as a prompt engineer.

When it triggers

  • Activates only when the user explicitly asks to write, fix, improve, or adapt a prompt for a specific AI tool (LLM, Cursor, Midjourney, image AI, video AI, coding agents, etc.
  • activate for general conversation, coding tasks, document writing, or other non-prompt-engineering work.

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FAQ

Prompt Master FAQ

Still curious? Email info@appsgit.com.

How do I install the Prompt Master skill?

Copy the prompt-master folder (the one containing SKILL.md) into ~/.claude/skills/ for Claude Code, .agents/skills/ for Codex or .cursor/skills/ for Cursor. The agent picks it up automatically when a task matches its description.

Is the Prompt Master skill free?

Yes. The repository is open source under the MIT license.

Is Prompt Master maintained?

The repository's most recent commit was on Oct 22, 2026. appsgit only lists skills from repositories with a commit in the last six months.