🤔 What Are Claude Skills?

A Claude Skill is a portable, copy-paste-ready instruction file that gives Claude a specialized capability. Unlike generic prompt collections, each skill is:

⚡ Quick Start

Method 1: Claude.ai (Recommended for beginners)

1. Browse the Skill Catalog below
2. Open the skill file (e.g., skills/developer/code-reviewer.md)
3. Copy the content inside the <system_prompt> tags
4. Paste it into Claude.ai → Project Knowledge or Custom Instructions
5. Start chatting — Claude now has that skill!

Method 2: Claude Code (CLAUDE.md)

1. Copy the skill file to your project root as CLAUDE.md (or append to an existing one)
2. Run claude in your terminal — it auto-reads the file
3. Claude Code now operates with that specialized skill

Method 3: API / SDK

import anthropic

# Load the skill
with open("skills/developer/code-reviewer.md") as f:
    skill = f.read()

client = anthropic.Anthropic()
message = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=4096,
    system=skill,  # ← The skill becomes the system prompt
    messages=[{"role": "user", "content": "Review this pull request: ..."}]
)

📚 Skill Catalog

🛠️ Developer Skills

🔒 Security Skills

📊 Data & Analysis Skills

✍️ Writing & Content Skills

🏗️ Architecture & DevOps Skills

🧩 Productivity Skills

🎨 Creative Skills

🧬 Skill Anatomy

Every skill follows a consistent structure:

skills/
├── developer/
│   └── code-reviewer.md        ← The skill file
├── security/
│   └── threat-modeler.md
└── ...

Each skill file contains:

# 🔍 Skill Name
> One-line description

## Metadata
- **Category**: Developer | Security | Data | Writing | DevOps | Productivity | Creative
- **Difficulty**: ⭐ | ⭐⭐ | ⭐⭐⭐
- **Works With**: Claude.ai, Claude Code, API
- **Estimated Tokens**: ~500 system prompt tokens

## System Prompt
<system_prompt>
  ... the actual instruction set ...
</system_prompt>

## Example Usage
**User**: [example input]
**Claude**: [example output]

## Tips & Variations
- Modification ideas for different use cases

🔨 Create Your Own

Use our Skill Template to create your own skill:

1. Fork this repo
2. Copy SKILL_TEMPLATE.md into the appropriate skills/<category>/ folder
3. Fill in your skill following the template structure
4. Test it thoroughly (include real example I/O)
5. Submit a PR!

Pro tips:

• Use XML tags (<context>, <constraints>, <output_format>) for complex instructions
• Keep system prompts under 1000 tokens for optimal performance
• Include at least 2 example interactions
• Add edge cases in your "Tips & Variations" section

🤝 Contributing

We love contributions! Whether it's a new skill, an improvement to an existing one, or fixing a typo — every PR is welcome.

Please read our Contributing Guide and Code of Conduct before submitting.

What makes a great skill?

• ✅ Solves a real problem people encounter regularly
• ✅ Includes tested examples with realistic inputs/outputs
• ✅ Is self-contained — no external dependencies or setup
• ✅ Has a clear, specific scope — does one thing extremely well
• ✅ Uses structured formatting (XML tags, markdown) for reliability

🌟 Star History

If this repo helped you, please consider giving it a ⭐ — it helps others discover these skills!

📜 License

This project is licensed under the MIT License — see the LICENSE file for details.