How does the prompt optimization feature work?

The 'promptgen' command uses specialized templates (like photography or character) to transform a simple text description into a highly detailed prompt that yields better results from the AI.

How do I manage costs while generating images?

The tool provides a detailed JSON response for every operation, including estimated USD costs based on actual token usage and the specific model (Flash vs. Pro) used.

What is the Gemini Nano Banana Tool?

It is a professional CLI-based Claude Code skill that interfaces with Google Gemini to provide advanced image generation, editing, and prompt optimization capabilities.

Does it support different aspect ratios?

Yes, it supports over 10 standard aspect ratios including 1:1, 16:9, 4:3, and cinematic formats like 21:9.

Can I edit existing images with this skill?

Yes, it supports image-to-image workflows where you can provide reference images and natural language instructions to perform edits or style transfers.

Gemini Nano Banana Image Tool

Name: Gemini Nano Banana Image Tool
Author: dnvriend

bydnvriend

0•

Design Tools

Generates and refines high-quality images using Google Gemini AI with built-in prompt optimization and cost tracking.

This skill provides a professional interface for Google Gemini's image generation capabilities, allowing developers and creators to transform simple descriptions into high-resolution visual assets directly from the CLI. It features advanced prompt engineering templates, multi-turn conversation support for iterative refinement, and transparent cost tracking for budget management. Whether you're generating social media content, product mockups, or professional photography, this tool streamlines the workflow from text to final image through an agent-friendly interface that integrates seamlessly with Claude Code.

Key Features

01AI-powered prompt optimization with domain-specific templates for photography, logos, and characters

02Support for 10+ aspect ratios including 16:9, 9:16, and cinematic 21:9

03Advanced model selection between Gemini Flash for speed and Gemini Pro for 4K quality

04Multi-turn image refinement via conversation history for iterative editing

05Real-time cost calculation and token usage tracking for every generation

060 GitHub stars

Use Cases

01Iterative UI/UX and product prototyping using reference images and natural language instructions

02Batch processing of visual content for blogs and documentation using CLI pipelines

03Automated creation of marketing materials and social media assets from text descriptions

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add dnvriend/gemini-nano-banana-tool gemini-nano-banana-tool

For use in Claude.ai and ChatGPT

Download Skill