How do I install the Nano Banana Image skill?

Run npx skillmds add majiayu000/nano-banana-image in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Nano Banana Image skill do?

Generate and edit images using Google's Gemini image generation models. It is listed under Coding & Dev Tools on SkillMD.

Is Nano Banana Image safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: makes network calls, reads secrets. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Nano Banana Image?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Nano Banana Image free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Nano Banana Image?

majiayu000 (@majiayu000) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Nano Banana Image by majiayu000 — Agent Skill

Name: Nano Banana Image
Rating: 4.2 (5 reviews)
Author: majiayu000

File contents

nano-banana-image

Generate and edit images using Google's Gemini image generation models.

When to use this skill

Use this skill when the user wants to:

Generate images from text prompts
Edit or transform existing images with instructions
Create logos, illustrations, product photos, or any visual content

Usage

cd ~/.claude/skills/nano-banana-image
node scripts/nano_banana.js [options]

Options

Flag	Description	Default
`--model`	Model to use: `flash` (fast) or `pro` (higher quality)	`flash`
`--prompt`	Text prompt describing the image to generate	required
`--input`	Path to input image for editing (flash only)	none
`--out`	Output path for generated image	`outputs/output.png`
`--aspect`	Aspect ratio: `1:1`, `16:9`, `9:16`, `4:3`, `3:4`	`1:1`

Models

Model	API Name	Features
`flash`	`gemini-2.5-flash-image`	Fast, supports image editing, good quality
`pro`	`imagen-4.0-generate-001`	Higher quality, text-to-image only

Examples

Text to image:

node scripts/nano_banana.js \
  --model flash \
  --prompt "A clean minimalist ninja logo, bold outline, white background" \
  --out outputs/logo.png

Widescreen background:

node scripts/nano_banana.js \
  --model flash \
  --aspect 16:9 \
  --prompt "Abstract background with purple and blue gradients, geometric shapes" \
  --out outputs/background.png

High quality generation:

node scripts/nano_banana.js \
  --model pro \
  --aspect 16:9 \
  --prompt "A cinematic product photo of a smartwatch on a reflective surface" \
  --out outputs/product.png

Edit existing image:

node scripts/nano_banana.js \
  --model flash \
  --input inputs/room.png \
  --prompt "Restyle this room as modern Japanese minimalism" \
  --out outputs/room_edited.png

How it works

Script sends prompt to Gemini API with responseModalities: ["TEXT", "IMAGE"]
Model generates image and returns base64-encoded data
Script decodes and saves to output file

Requirements

Node.js 18+
GEMINI_API_KEY environment variable (get one at Google AI Studio)

Setup

cd ~/.claude/skills/nano-banana-image
bun install
export GEMINI_API_KEY="your-key-here"

Rate Limits (Free Tier)

~2-3 images per day
Resets at midnight Pacific Time
Upgrade billing for higher limits

---name: nano-banana-imagedescription: Generate and edit images using Google's Gemini image generation models.--- # nano-banana-image Generate and edit images using Google's Gemini image generation models. ## When to use this skill Use this skill when the user wants to: - Generate images from text prompts - Edit or transform existing images with instructions - Create logos, illustrations, product photos, or any visual content ## Usage ```bash cd ~/.claude/skills/nano-banana-image node scripts/nano_banana.js [options] ``` ### Options | Flag | Description | Default | |------|-------------|---------| | `--model` | Model to use: `flash` (fast) or `pro` (higher quality) | `flash` | | `--prompt` | Text prompt describing the image to generate | required | | `--input` | Path to input image for editing (flash only) | none | | `--out` | Output path for generated image | `outputs/output.png` | | `--aspect` | Aspect ratio: `1:1`, `16:9`, `9:16`, `4:3`, `3:4` | `1:1` | ### Models | Model | API Name | Features | |-------|----------|----------| | `flash` | `gemini-2.5-flash-image` | Fast, supports image editing, good quality | | `pro` | `imagen-4.0-generate-001` | Higher quality, text-to-image only | ### Examples **Text to image:** ```bash node scripts/nano_banana.js \ --model flash \ --prompt "A clean minimalist ninja logo, bold outline, white background" \ --out outputs/logo.png ``` **Widescreen background:** ```bash node scripts/nano_banana.js \ --model flash \ --aspect 16:9 \ --prompt "Abstract background with purple and blue gradients, geometric shapes" \ --out outputs/background.png ``` **High quality generation:** ```bash node scripts/nano_banana.js \ --model pro \ --aspect 16:9 \ --prompt "A cinematic product photo of a smartwatch on a reflective surface" \ --out outputs/product.png ``` **Edit existing image:** ```bash node scripts/nano_banana.js \ --model flash \ --input inputs/room.png \ --prompt "Restyle this room as modern Japanese minimalism" \ --out outputs/room_edited.png ``` ## How it works 1. Script sends prompt to Gemini API with `responseModalities: ["TEXT", "IMAGE"]` 2. Model generates image and returns base64-encoded data 3. Script decodes and saves to output file ## Requirements - Node.js 18+ - `GEMINI_API_KEY` environment variable (get one at [Google AI Studio](https://aistudio.google.com/apikey)) ## Setup ```bash cd ~/.claude/skills/nano-banana-image bun install export GEMINI_API_KEY="your-key-here" ``` ## Rate Limits (Free Tier) - ~2-3 images per day - Resets at midnight Pacific Time - Upgrade billing for higher limits

Frequently asked questions