How do I install the Gemini Imagegen skill?

Run npx skillmds@latest add fltman/gemini-imagegen 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.

Is Gemini Imagegen safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: executes scripts, 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 Gemini Imagegen?

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 Gemini Imagegen free to use?

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

Who published Gemini Imagegen?

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

Gemini Imagegen by fltman — Agent Skill

Name: Gemini Imagegen
Rating: 4.5 (4 reviews)
Author: fltman

Gemini Imagegen

Generate AI images using Google Gemini via OpenRouter. Use when the user wants to create images, generate pictures, make AI art, edit images, or transform photos. Supports both text-to-image and image-to-image generation.

fltman Updated Sep 22, 2026

File contents

Gemini Image Generation

Generate high-quality AI images using Google's Gemini model via OpenRouter API.

Capabilities

Text-to-image: Create images from text descriptions
Image-to-image: Transform existing images based on prompts (style transfer, editing, variations)

Requirements

Before using this skill, ensure:

Python packages are installed:
```
pip install openai python-dotenv
```
API key is set:
```
export OPENROUTER_API_KEY="your-openrouter-api-key"
```
Get your key at: https://openrouter.ai/keys

Usage

Text-to-Image

Generate an image from a text description:

python scripts/generate_image.py --prompt "A serene Japanese garden with cherry blossoms" --output garden.png

Image-to-Image

Transform an existing image:

python scripts/generate_image.py --input photo.jpg --prompt "Transform into a watercolor painting style" --output watercolor.png

Script Arguments

Argument	Short	Required	Description
`--prompt`	`-p`	Yes	Text description of the desired image
`--output`	`-o`	No	Output file path (default: `generated_image.png`)
`--input`	`-i`	No	Input image for image-to-image mode
`--model`	`-m`	No	Model ID (default: `google/gemini-3-pro-image-preview`)

Prompt Tips

For best results:

Be specific: Include details about style, lighting, composition, and mood
Reference art styles: "in the style of impressionism", "photorealistic", "anime style"
Describe lighting: "soft morning light", "dramatic shadows", "golden hour"
Include atmosphere: "mysterious", "cheerful", "melancholic"

Example Prompts

Portrait:

A portrait of an elderly fisherman with weathered skin and kind eyes, 
wearing a knit cap, soft natural lighting, shallow depth of field, 
photorealistic style

Landscape:

A misty mountain valley at dawn, pine forests in the foreground, 
snow-capped peaks in the distance, rays of sunlight breaking through 
clouds, epic cinematic composition

Abstract:

Abstract fluid art with deep ocean blues and metallic gold, 
swirling patterns resembling galaxies, high contrast, 
luxurious and elegant mood

Workflow

Understand what the user wants to create
Craft a detailed, descriptive prompt
Run the generation script
If the user provides an image, use image-to-image mode
Present the generated image to the user
Offer to iterate or adjust based on feedback

Troubleshooting

"OPENROUTER_API_KEY not set"

Set the environment variable: export OPENROUTER_API_KEY="your-key"

"openai package not installed"

Install it: pip install openai

"No images found in response"

The model may have returned text instead of an image
Try rephrasing the prompt to be more visual/descriptive
Check if your API key has credits available

Output

The script will:

Print progress messages
Save the image to the specified output path
Print "SUCCESS" with the file path on success
Return exit code 0 on success, 1 on failure

---name: gemini-imagegendescription: Generate AI images using Google Gemini via OpenRouter. Use when the user wants to create images, generate pictures, make AI art, edit images, or transform photos. Supports both text-to-image and image-to-image generation.---# Gemini Image GenerationGenerate high-quality AI images using Google's Gemini model via OpenRouter API.## Capabilities- **Text-to-image**: Create images from text descriptions- **Image-to-image**: Transform existing images based on prompts (style transfer, editing, variations)## RequirementsBefore using this skill, ensure:1. **Python packages** are installed: ```bash pip install openai python-dotenv ```2. **API key** is set: ```bash export OPENROUTER_API_KEY="your-openrouter-api-key" ``` Get your key at: https://openrouter.ai/keys## Usage### Text-to-ImageGenerate an image from a text description:```bashpython scripts/generate_image.py --prompt "A serene Japanese garden with cherry blossoms" --output garden.png```### Image-to-ImageTransform an existing image:```bashpython scripts/generate_image.py --input photo.jpg --prompt "Transform into a watercolor painting style" --output watercolor.png```## Script Arguments| Argument | Short | Required | Description ||----------|-------|----------|-------------|| `--prompt` | `-p` | Yes | Text description of the desired image || `--output` | `-o` | No | Output file path (default: `generated_image.png`) || `--input` | `-i` | No | Input image for image-to-image mode || `--model` | `-m` | No | Model ID (default: `google/gemini-3-pro-image-preview`) |## Prompt TipsFor best results:1. **Be specific**: Include details about style, lighting, composition, and mood2. **Reference art styles**: "in the style of impressionism", "photorealistic", "anime style"3. **Describe lighting**: "soft morning light", "dramatic shadows", "golden hour"4. **Include atmosphere**: "mysterious", "cheerful", "melancholic"### Example Prompts**Portrait:**```A portrait of an elderly fisherman with weathered skin and kind eyes, wearing a knit cap, soft natural lighting, shallow depth of field, photorealistic style```**Landscape:**```A misty mountain valley at dawn, pine forests in the foreground, snow-capped peaks in the distance, rays of sunlight breaking through clouds, epic cinematic composition```**Abstract:**```Abstract fluid art with deep ocean blues and metallic gold, swirling patterns resembling galaxies, high contrast, luxurious and elegant mood```## Workflow1. Understand what the user wants to create2. Craft a detailed, descriptive prompt3. Run the generation script4. If the user provides an image, use image-to-image mode5. Present the generated image to the user6. Offer to iterate or adjust based on feedback## Troubleshooting**"OPENROUTER_API_KEY not set"**- Set the environment variable: `export OPENROUTER_API_KEY="your-key"`**"openai package not installed"**- Install it: `pip install openai`**"No images found in response"**- The model may have returned text instead of an image- Try rephrasing the prompt to be more visual/descriptive- Check if your API key has credits available## OutputThe script will:1. Print progress messages2. Save the image to the specified output path3. Print "SUCCESS" with the file path on success4. Return exit code 0 on success, 1 on failure

Frequently asked questions