# Image Generator

Generate and edit images using Gemini's Nano Banana Pro model...

- Repository: https://github.com/dair-ai/dair-academy-plugins (618 stars)
- Category: Media
- License: MIT
- Last updated: 2026-07-21
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add dair-ai/dair-academy-plugins --skill image-generator -g -a claude-code -y`
Codex: `npx skills add dair-ai/dair-academy-plugins --skill image-generator -g -a codex -y`
Cursor: `npx skills add dair-ai/dair-academy-plugins --skill image-generator -g -a cursor -y`
Gemini CLI: `npx skills add dair-ai/dair-academy-plugins --skill image-generator -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add dair-ai/dair-academy-plugins`

## Description

Generate and edit images using Gemini's Nano Banana Pro model (gemini-3-pro-image-preview). Use this skill when the user asks you to generate images, create visuals, edit photos, create logos, generate product mockups, or perform any image generation/editing task.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Image Generator

This skill generates and edits images using Google's Gemini Nano Banana Pro model (`gemini-3-pro-image-preview`).

## IMPORTANT: Setup Required

Before using this skill, the user must set the `GEMINI_API_KEY` environment variable:

1. Get a free API key from [Google AI Studio](https://aistudio.google.com/)
2. Export the key in your shell profile (`~/.zshrc`, `~/.bashrc`, etc.):
   ```bash
   export GEMINI_API_KEY="your_api_key_here"
   ```
3. Restart your terminal or run `source ~/.zshrc` (or `~/.bashrc`)

**The skill will not work without this configuration.**

## Pre-flight Check

Before making any API call, verify the key is set:

```bash
if [ -z "$GEMINI_API_KEY" ]; then
  echo "ERROR: GEMINI_API_KEY is not set. Please export it in your shell profile."
  exit 1
fi
```

If the key is missing, stop and tell the user to set it using the instructions above.

## Configuration

**Model**: `gemini-3-pro-image-preview`

**API Key**: Read from the `GEMINI_API_KEY` environment variable

## Iterating on User-Provided Images

When the user provides a path to an image they want to edit or iterate on, use this workflow:

### Step 1: Read and encode the image to base64

```bash
# Get the image path from user
IMG_PATH="/path/to/user/image.png"

# Detect mime type
if [[ "$IMG_PATH" == *.png ]]; then
    MIME_TYPE="image/png"
elif [[ "$IMG_PATH" == *.jpg ]] || [[ "$IMG_PATH" == *.jpeg ]]; then
    MIME_TYPE="image/jpeg"
elif [[ "$IMG_PATH" == *.webp ]]; then
    MIME_TYPE="image/webp"
else
    MIME_TYPE="image/png"
fi

# Encode to base64 (works on both macOS and Linux)
if [[ "$(uname)" == "Darwin" ]]; then
    IMG_BASE64=$(base64 -i "$IMG_PATH")
else
    IMG_BASE64=$(base64 -w0 "$IMG_PATH")
fi
```

### Step 2: Send image with edit prompt (File-Based Approach)

**IMPORTANT:** Always use a file-based approach for the request body. Base64-encoded images are too large for command-line arguments and will cause "argument list too long" errors.

The rest: https://github.com/dair-ai/dair-academy-plugins/blob/HEAD/plugins/image-generator/skills/image-generator/SKILL.md