Skillget

rei-skills

mcp
Security Audit
Fail
Health Warn
  • License — License: NOASSERTION
  • Description — Repository has a description
  • Active repo — Last push 0 days ago
  • Low visibility — Only 5 GitHub stars
Code Fail
  • child_process — Shell command execution capability in bin/install.js
  • spawnSync — Synchronous process spawning in bin/install.js
  • fs.rmSync — Destructive file system operation in bin/install.js
  • process.env — Environment variable access in bin/install.js
  • fs module — File system access in bin/install.js
Permissions Pass
  • Permissions — No dangerous permissions requested
Purpose
This package provides a large collection of 883+ predefined prompts, or "skills," intended to extend the capabilities of AI coding assistants like Claude Code, Gemini CLI, and Cursor.

Security Assessment
Overall Risk: High
The repository is listed as a Python MCP server, but its primary installation script (`bin/install.js`) introduces significant security concerns. The script executes synchronous shell commands (`spawnSync`, `child_process`) and performs destructive file system operations (`fs.rmSync`). Additionally, it accesses environment variables (`process.env`), which creates a potential vector for credential theft if the script is modified or behaves unexpectedly. While no hardcoded secrets or explicit network requests were flagged, the combination of arbitrary command execution and file deletion in the installation process is highly dangerous.

Quality Assessment
The project was recently updated, but it currently has very low community visibility with only 5 GitHub stars. The tool's license is marked as "NOASSERTION" by automated scanners, despite the README claiming it uses an MIT license. This discrepancy, combined with the company's extensive self-promotional text in the documentation, suggests the project is in its very early stages and lacks independent community validation or trust.

Verdict
Not recommended — the aggressive file system operations and shell command execution capabilities in the installation script present an unacceptable security risk for everyday development use.
SUMMARY

🏰 883+ Universal Agentic Skills for Claude Code, Gemini CLI, Cursor & More — Curated by Rootcastle Engineering & Innovation (REI) | Batuhan Ayrıbaş

README.md

🏰 Rei Skills — 883+ Universal Agentic Skills

The Ultimate Collection of 883+ Universal Agentic Skills for AI Coding Assistants — Curated by Rootcastle Engineering & Innovation (REI) | Batuhan Ayrıbaş

Rootcastle
npm
License: MIT
Skills

Claude Code
Gemini CLI
Codex CLI
Cursor
Copilot
Antigravity

🏰 About Rootcastle Engineering & Innovation

Rootcastle is an international technology company that unifies engineering disciplines under a single architecture. With our software and R&D center in Estonia integrated with manufacturing, hardware development, and engineering capabilities in Turkey, we develop reliable, flexible, and scalable technologies.

Our expertise spans software development, PCB & hardware design, embedded systems, IoT & GPS telematics, data security, 3D manufacturing, rapid prototyping, and e-commerce integrations. This infrastructure serves industries from logistics and manufacturing to public services, security, fleet management, and critical monitoring operations.

Fleet telemetry devices, OBD-II product families, solar asset tracking systems, and mobile monitoring units. Through our technology partners in the UK and US, our platforms deliver cloud architectures, mobile applications, and modern API integrations.

🌍 5 International Partnerships | 150+ Global Projects
🔗 Website: www.rootcastle.com
📧 Contact: [email protected]
📱 Phone: +90 507 545 29 39

Table of Contents

Quick Start

Install once, use everywhere. Get 883+ skills in your AI coding assistant in under a minute.

1. Install

# Default: ~/.gemini/rei/skills (Global)
npx rei-skills

# Or choose your platform:
npx rei-skills --claude       # Claude Code
npx rei-skills --gemini       # Gemini CLI
npx rei-skills --cursor       # Cursor IDE
npx rei-skills --codex        # Codex CLI
npx rei-skills --antigravity  # Antigravity IDE

2. Verify

test -d ~/.gemini/rei/skills && echo "✅ Rei Skills installed successfully"

3. Use Your First Skill

"Use @brainstorming to plan a SaaS MVP."

4. Pick a Bundle

  • Web Dev? → Start with Web Wizard
  • Security? → Start with Security Engineer
  • General? → Start with Essentials

👉 Complete Usage Guide — Start here after installation
👉 Bundles Guide — Curated skill packs by role

Compatibility & Invocation

Rei Skills follow the universal SKILL.md format and work with any AI coding assistant that supports agentic skills.

Tool Type Invocation Example Path
Claude Code CLI >> /skill-name help me... .claude/skills/
Gemini CLI CLI (User Prompt) Use skill-name... .gemini/skills/
Codex CLI CLI (User Prompt) Use skill-name... .codex/skills/
Antigravity IDE (Agent Mode) Use skill... Global: ~/.gemini/rei/skills/ · Workspace: .agent/skills/
Cursor IDE @skill-name (in Chat) .cursor/skills/
Copilot Ext (Paste content manually) N/A
OpenCode CLI opencode run @skill-name .agents/skills/
AdaL CLI CLI (Auto) Skills load on-demand .adal/skills/

[!TIP]
Default installer path: ~/.gemini/rei/skills (Global). Use --path ~/.agent/skills for workspace-specific install.

[!WARNING]
Windows Users: This repository uses symlinks for official skills. Enable Developer Mode or run Git as Administrator. See Troubleshooting.

Installation

Option A: npx (Recommended)

# Default: ~/.gemini/rei/skills (Global)
npx rei-skills

# Claude Code
npx rei-skills --claude

# Gemini CLI
npx rei-skills --gemini

# Codex CLI
npx rei-skills --codex

# Cursor
npx rei-skills --cursor

# Antigravity IDE
npx rei-skills --antigravity

# OpenCode
npx rei-skills --path .agents/skills

# Custom path
npx rei-skills --path ./my-skills

Run npx rei-skills --help for all options.

Option B: Git Clone

# Global (matches npx default)
git clone https://github.com/rootcastleco/rei-skills.git ~/.gemini/rei/skills

# Workspace-specific
git clone https://github.com/rootcastleco/rei-skills.git .agent/skills

# Claude Code
git clone https://github.com/rootcastleco/rei-skills.git .claude/skills

# Gemini CLI
git clone https://github.com/rootcastleco/rei-skills.git .gemini/skills

# Cursor
git clone https://github.com/rootcastleco/rei-skills.git .cursor/skills

Troubleshooting

npx rei-skills returns 404

Use the GitHub package fallback:

npx github:rootcastle/rei-skills

Windows clone issues (symlinks)

git clone -c core.symlinks=true https://github.com/rootcastleco/rei-skills.git .agent/skills

Skills installed but not detected

Install to the tool-specific path using the installer flags: --claude, --gemini, --codex, --cursor, --antigravity, or --path <dir>.

Update an existing installation

git -C ~/.gemini/rei/skills pull

Reinstall from scratch

rm -rf ~/.gemini/rei/skills
npx rei-skills

Curated Collections

Bundles are curated groups of skills for specific roles (e.g., Web Wizard, Security Engineer, OSS Maintainer).

Bundles are NOT separate installations. You already have all skills after one install. Bundles are simply recommended lists to help you focus.

How to use bundles:

  1. Install the repository once (all 883+ skills included)
  2. Browse bundles in docs/BUNDLES.md
  3. Pick 3-5 skills from a bundle to start
  4. Reference them in your conversations: "Use @brainstorming..."

Examples:

  • Building a SaaS MVP: Essentials + Full-Stack Developer + QA & Testing
  • Hardening production: Security Developer + DevOps & Cloud + Observability
  • Shipping OSS changes: Essentials + OSS Maintainer

Workflows

Bundles help you choose skills. Workflows help you execute them in order.

Available Workflows:

  • 🚀 Ship a SaaS MVP
  • 🔒 Security Audit for a Web App
  • 🤖 Build an AI Agent System
  • 🧪 QA and Browser Automation

Features & Categories

Category Focus Example Skills
Architecture System design, ADRs, C4, scalable patterns architecture, c4-context, senior-architect
Business Growth, pricing, CRO, SEO, go-to-market copywriting, pricing-strategy, seo-audit
Data & AI LLM apps, RAG, agents, observability rag-engineer, prompt-engineer, langgraph
Development Languages, frameworks, code quality typescript-expert, python-patterns, react-patterns
General Planning, docs, product ops, writing brainstorming, doc-coauthoring, writing-plans
Infrastructure DevOps, cloud, serverless, CI/CD docker-expert, aws-serverless, vercel-deployment
Security AppSec, pentesting, vuln analysis, compliance api-security-best-practices, vulnerability-scanner
Testing TDD, test design, QA workflows test-driven-development, testing-patterns, test-fixing
Workflow Automation, orchestration, agents workflow-automation, inngest, trigger-dev

Browse 883+ Skills

👉 View the Complete Skill Catalog (CATALOG.md)

Security

All skills are audited for security vulnerabilities, hardcoded credentials, and dangerous commands.

Offensive security skills (penetration testing, red teaming) are included for authorized educational and professional use only.

How to Contribute

  1. Fork the repository
  2. Create a new directory inside skills/ for your skill
  3. Add a SKILL.md with the required frontmatter (name, description, risk, source). See docs/SKILL_ANATOMY.md and docs/QUALITY_BAR.md.
  4. Run validation: npm run validate
  5. Submit a Pull Request

Credits & Sources

This collection stands on the shoulders of the open-source community. Full attribution is preserved in CREDITS.md.

Key sources include:

Author

Batuhan Ayrıbaş
Founder & Lead Engineer — Rootcastle Engineering & Innovation (REI)

License

MIT License. See LICENSE for details.

🏰 Rei Skills — Engineering Beyond Boundaries

Curated by Rootcastle Engineering & Innovation | © REI 2025. All rights reserved.

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