Do I need an API key to use this skill?

Yes, you must export a GEMINI_API_KEY or NANOBANANA_GEMINI_API_KEY in your environment, as OAuth alone is not sufficient for image generation tools.

Which Gemini model is used for image generation?

By default, the skill uses gemini-3-pro-image-preview for the highest quality, with an automatic fallback to gemini-2.5-flash-image if the pro model is unavailable.

Can I generate multiple icon sizes at once?

Yes, using the /icon command with the --sizes flag (e.g., --sizes="16,32,64,128") allows you to generate a complete set of assets in one call.

Is it safe to use the --yolo flag with this skill?

The --yolo flag is recommended and permitted specifically for nano-banana image generation tool calls to enable a seamless headless workflow in Claude Code.

How do I ensure the images are saved to my project?

Images are typically saved to your current directory or ~/gemini-output/; you can then use standard terminal commands like 'cp' or 'mv' to move them into your project folders.

Gemini Image Generation

Name: Gemini Image Generation
Author: nthplusio

bynthplusio

0•

Design Tools

Generates professional visual assets, icons, and technical diagrams directly within Claude Code using the Gemini CLI nano-banana extension.

This skill integrates Gemini's advanced image generation capabilities into your Claude Code workflow, allowing you to create high-quality app icons, seamless patterns, technical architecture diagrams, and visual narratives without leaving your terminal. By leveraging the nano-banana extension, users can generate, edit, and restore images using natural language prompts, with automatic support for multiple sizes, styles, and model fallbacks. It streamlines the creation of design assets for developers, ensuring that visual documentation and UI elements can be produced alongside the code they represent.

Key Features

01Seamless pattern and texture creation for web backgrounds and UI design

02Technical diagram generation including flowcharts, architecture, and database schemas

03Multi-model support with automatic fallback from Pro to Flash for reliability

04Advanced image editing and photo restoration using natural language instructions

050 GitHub stars

06Specialized commands for app icons, favicons, and UI elements with specific sizing

Use Cases

01Generating a complete set of branded app icons and favicons for a new web project

02Visualizing complex system architectures and data flows for project documentation

03Creating consistent visual assets and hero images for GitHub READMEs and landing pages

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add nthplusio/functional-claude gemini-images

For use in Claude.ai and ChatGPT

Download Skill