nano-banana

Nano Banana Pro JSON Prompt Translator

Stop rolling dice. Start turning dials.

This repository contains a Claude Code slash command that translates natural language descriptions into structured JSON schemas for Nano Banana Pro (Gemini 3 Pro Image).

What It Does

Instead of writing vague prompts and hoping for the best, the translator helps you build precise specifications where every element - lighting, camera angle, composition, props - lives on its own "fader." Change one thing without affecting everything else.

Supported schema types:

• Marketing Images - Product shots, hero images, brand photography
• UI/UX Mockups - App screens, dashboards, websites
• Diagrams - Flowcharts, architecture diagrams, process maps
• Data Visualizations - Charts, graphs with accurate data
• Social Graphics - Platform-specific social media content

Installation

From GitHub (Recommended)

First, add the marketplace to Claude Code:

/plugin marketplace add https://github.com/jawhnycooke/claude-code-nano-banana

Then install the plugin:

/plugin

Follow these steps:

1. Select 1. Browse and install plugins
2. Select marketplace claude-code-nano-banana
3. Press the Space bar to select nano-banana
4. Press i to install
5. /exit Claude code and restart

This installs the plugin directly from this repository.

Usage

Invoke the command with a rough description:

/nano-banana vinyl record product shot, moody lighting, vintage feel

The translator will ask clarifying questions, then output a complete JSON specification ready to paste into Nano Banana Pro.

Tutorial

See the full tutorial: Dials, Not Dice: A Precision Prompting Guide for Nano Banana Pro and Claude Code

The examples/vinyl-record-tutorial/ folder contains the JSON files from the tutorial so you can follow along.

Contact

For questions, issues, or contributions, contact: plugins@jawhnycooke.ai

License

MIT