What is the primary benefit of JSON prompting over text?

JSON prompting allows for 'handles' and scoped edits, meaning you can modify specific elements like lighting or a single prop without causing the entire image to be randomly regenerated.

Does this skill render the final image?

No, this skill acts as a translator. It generates the complex JSON specification which you then paste into Nano Banana Pro to perform the actual rendering.

Which image generation model does this skill support?

This skill is specifically optimized for Nano Banana Pro, which utilizes the Gemini 3 Pro Image model for high-fidelity rendering from structured data.

Can I use this for brand-specific marketing assets?

Yes, the marketing_image schema includes dedicated sections for brand assets, logo placement, and primary color palettes to ensure visual consistency.

Nano Banana JSON Prompting

Name: Nano Banana JSON Prompting
Author: jawhnycooke

byjawhnycooke

0•

Design Tools

Transforms natural language into structured JSON schemas for precise and reproducible image generation control in Nano Banana Pro.

This skill bridges the gap between creative intent and technical execution by translating natural language descriptions into rigorous JSON specifications for Nano Banana Pro (Gemini 3 Pro Image). It provides professional-grade control over image generation across five distinct domains—marketing, UI/UX, diagrams, data visualization, and social media. By utilizing a stable 'handle' system, it enables scoped edits, consistent branding, and pixel-perfect layouts that natural language alone cannot achieve, making it ideal for iterative design workflows and high-fidelity asset production.

Key Features

01Five specialized schema types for marketing, UI, diagrams, data viz, and social content

02Brand consistency enforcement through locked color tokens and logo placements

03Granular camera and lighting controls including focal length and light direction

040 GitHub stars

05Stable handle system for scoped edits and element-specific iterations

06Platform-specific social media presets with automated dimension handling

Use Cases

01Building accurate data visualizations and flowcharts from raw descriptive text

02Creating consistent product photography hero shots for e-commerce campaigns

03Generating high-fidelity UI mockups with exact component placement and hex color tokens

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add jawhnycooke/claude-plugins skills

For use in Claude.ai and ChatGPT

Download Skill