Agent Skills

nano-banana-prompt

Claude Code skills collection - viral growth, marketing, and more

설치
CLI
npx skills add https://github.com/giulioco/skills --skill nano-banana-prompt

CLI를 사용하여 이 스킬을 설치하고 작업 공간에서 SKILL.md 워크플로 사용을 시작하세요.

최근 업데이트: 4/22/2026

Giulio's Claude Code Skills Collection

A curated collection of Claude Code skills for developers, marketers, and founders. Install with a single command to extend Claude's capabilities with specialized knowledge and workflows.

Quick Start

Install all skills:

npx add-skill giulioco/skills

Install specific skills only:

npx add-skill giulioco/skills --skill social-growth-engineer

Available Skills

🎨 nano-banana-prompt

Master prompt engineering for Nano Banana Pro (Gemini) image generation.

What it does: Comprehensive guide for crafting highly effective prompts for Nano Banana Pro. Provides proven patterns, technical specifications, JSON structuring, and identity preservation techniques based on analyzing 60+ successful prompts.

Use when:

  • Generating photorealistic portraits
  • Creating product photography and e-commerce mockups
  • Building creative experiments (3D renders, dioramas, surreal effects)
  • Crafting era-specific aesthetics (Y2K, 2000s, 1990s)
  • Editing and transforming images
  • Preserving facial identity across transformations

Knowledge includes:

  • Identity preservation techniques
  • Technical specifications (cameras, lenses, lighting, film stocks)
  • 5 comprehensive reference guides (photorealism, creative experiments, product/commercial, editing, JSON templates)
  • Era-specific templates (2000s mirror selfie, Y2K scrapbook, 1990s flash photography)
  • Quick reference templates for common use cases
  • Advanced techniques (multi-element scenes, negative prompts, text integration)

Size: 38 KB (SKILL.md + 5 reference files)

View Details →

🚀 social-growth-engineer

Master viral app growth through organic social media marketing.

What it does: Teaches Claude everything about growing consumer apps virally through TikTok, Instagram Reels, and YouTube Shorts. Based on analyzing 100+ successful app launches generating billions of views and millions in monthly revenue.

Use when:

  • Launching or growing a consumer app
  • Creating viral content strategies
  • Building UGC ambassador networks
  • Optimizing monetization and conversion
  • Analyzing competitor growth tactics

Knowledge includes:

  • 100+ real case studies with verified metrics ($10K to $5.5M ARR)
  • 50+ proven hook formulas
  • 30+ video format templates
  • Platform-specific tactics (TikTok, Instagram, YouTube)
  • Niche playbooks (study apps, dating, fitness, Bible, AI companions, travel)
  • Complete growth frameworks and scaling strategies

Size: 91 KB (SKILL.md + 3 reference files)

View Details →

📈 postbridge-social-growth

Organic growth coach using the Post Bridge methodology.

What it does: Acts as a personalized organic growth coach for apps, products, and businesses seeking traffic from TikTok and Instagram short-form video. Based on the Post Bridge system that generated 500M+ views, 132K+ downloads, and $33K+ revenue with zero paid ads.

Use when:

  • Starting organic social media growth from scratch
  • Warming up new TikTok/Instagram accounts
  • Finding winning content formats (content-market fit)
  • Converting views into app downloads or customers
  • Writing conversion-optimized social media bios
  • Riding trends for momentum
  • Scaling to multiple accounts and platforms

Knowledge includes:

  • Complete 30-day growth roadmap
  • 7-day account warmup protocol
  • Content-market fit testing framework
  • Conversion funnel optimization (views → downloads)
  • Trend identification and adaptation playbook
  • Three-phase scaling framework
  • Bio writing formulas and CTA strategies

Size: 12 KB (SKILL.md + 1 reference file)

View Details →

Installation

Install All Skills

npx add-skill giulioco/skills

This installs all skills in the collection to your ~/.claude/skills/ directory.

Install Specific Skills

List available skills first:

npx add-skill giulioco/skills --list

Then install only what you need:

npx add-skill giulioco/skills --skill social-growth-engineer

Install Globally

npx add-skill -g giulioco/skills

Non-Interactive Mode

npx add-skill giulioco/skills -y

Usage

Once installed, skills are available in Claude Code:

Automatic Invocation

Claude automatically activates skills when you ask relevant questions:

How do I grow my app virally?
What hooks work for dating apps?
Help me launch in 30 days

Manual Invocation

Invoke a skill manually with slash commands:

/social-growth-engineer

Then ask your questions.

List Your Skills

In Claude Code, type / to see all available skills.

Repository Structure

skills/
├── README.md                       # This file
├── LICENSE                         # Apache 2.0
├── CONTRIBUTING.md                 # Contribution guidelines
├── .gitignore
└── skills/
    ├── nano-banana-prompt/         # Nano Banana Pro prompt engineering
    │   ├── SKILL.md                # Main skill file
    │   └── references/             # Supporting documentation
    │       ├── photorealism-portraits.md
    │       ├── creative-experiments.md
    │       ├── product-commercial.md
    │       ├── editing-transformation.md
    │       └── json-structure-guide.md
    ├── social-growth-engineer/     # Viral app growth
    │   ├── SKILL.md                # Main skill file
    │   └── references/             # Supporting documentation
    │       ├── complete-playbook.md
    │       ├── hooks-and-formats.md
    │       └── case-studies.md
    └── postbridge-social-growth/   # Post Bridge organic growth coach
        ├── SKILL.md                # Main skill file
        └── references/             # Supporting documentation
            └── methodology.md

Skills Roadmap

Coming Soon:

  • 📊 data-analyst: Advanced data analysis and visualization workflows
  • 🎨 design-system: Building and maintaining design systems
  • 🔧 devops-expert: Infrastructure, CI/CD, and deployment strategies
  • 📝 technical-writer: Creating clear technical documentation

Want to see a specific skill? Open an issue with your suggestion!

Contributing

We welcome contributions! Whether you want to:

  • Add new case studies to existing skills
  • Create entirely new skills
  • Fix errors or improve documentation
  • Share your successful strategies

See CONTRIBUTING.md for guidelines.

Development

Testing Skills Locally

Clone and test before installation:

git clone https://github.com/giulioco/skills.git
cd skills
npx add-skill .

Test the skill in Claude Code by asking relevant questions.

Creating New Skills

  1. Create a new directory in skills/:

    mkdir -p skills/my-new-skill

  2. Create SKILL.md with proper frontmatter:

    ---
name: my-new-skill
description: Clear description of what this skill does
---

# Skill Content

Instructions for Claude...

  3. Test locally with npx add-skill .

  4. Submit a PR!

See the Claude Code Skills Documentation for detailed skill authoring guidelines.

License

This collection is licensed under the Apache License 2.0. See LICENSE for details.

Individual skills may have additional attributions in their reference materials.

Acknowledgments

social-growth-engineer is built from analyzing the Social Growth Engineer newsletter archive. All case studies and metrics are from real apps and verified sources.

Support

Install now: npx add-skill giulioco/skills

Built with ❤️ for the Claude Code community