nanobanana

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Guide for generating and editing images using generative AI with the nanobanana CLI

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Sourcemaragudk/skills

Added on2026-02-08

NPX Install

npx skill4agent add maragudk/skills nanobanana

SKILL.md Content

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Nanobanana

This is a guide for generating and editing images using the nanobanana CLI tool.

Nanobanana is a command-line interface for the Nano Banana image generation API, which uses Google's generative AI models.

Installation

If the nanobanana CLI is not already installed, install it using:

bash

go install maragu.dev/nanobanana@latest

Prerequisites

The

GOOGLE_API_KEY

environment variable must be set, or a

.env

file with the key must be present in the working directory.

Generating images

To generate a single image:

bash

nanobanana generate output.png "a beautiful sunset over mountains"

The output can be either a

.png

or

.jpg

file.

Using the pro model

To use the higher-quality pro model for generation:

bash

nanobanana generate -pro output.png "a beautiful sunset over mountains"

The

-pro

flag enables Google's premium generative AI model, which typically produces higher quality results but may take slightly longer to generate.

Editing existing images

To edit or modify an existing image using a text prompt:

bash

nanobanana generate -i input.png output.png "make the sky purple and add stars"

This is useful for making specific changes to existing images based on natural language instructions.

Tips for effective prompts

Be specific and descriptive about what you want in the image
Include details about style, colors, mood, composition, and subject matter
For edits, clearly describe what should change while the rest remains the same
You can reference art styles, artists, or specific visual aesthetics

Examples

Generate a logo:

bash

nanobanana generate logo.png "minimalist tech company logo with geometric shapes in blue and white"

Create concept art:

bash

nanobanana generate concept.png "futuristic city skyline at night with neon lights and flying vehicles, cyberpunk style"

Edit an existing photo:

bash

nanobanana generate -i photo.png enhanced.png "enhance the colors and make it look like golden hour"

nanobanana

NPX Install

Tags

SKILL.md Content

Nanobanana

Installation

Prerequisites

Generating images

Using the pro model

Editing existing images

Tips for effective prompts

Examples