Gemini Image Gen

Gemini Image Gen

Generate and edit images via the Google Gemini API using pure Python stdlib. Supports Gemini native generation + editing, Imagen 3 generation, batch runs, and an HTML gallery output.

Quick Start

export GEMINI_API_KEY="your-key-here"

Default: Gemini native, 4 random prompts
python3 scripts/gen.py

Custom prompt
python3 scripts/gen.py --prompt "a cyberpunk cat riding a neon motorcycle through Tokyo at night"

Imagen 3 engine
python3 scripts/gen.py --engine imagen --count 4 --aspect 16:9

Edit an existing image (Gemini engine only)
python3 scripts/gen.py --edit path/to/image.png --prompt "change the background to a sunset beach"

Use a style preset
python3 scripts/gen.py --style watercolor --prompt "floating islands above a calm sea"

List available styles
python3 scripts/gen.py --styles

Style Presets

| Style | Description |

| --- | --- |

| photo | Ultra-detailed photorealistic photography, 8K resolution, sharp focus |

| anime | High-quality anime illustration, Studio Ghibli inspired, vibrant colors |

| watercolor | Delicate watercolor painting on textured paper, soft edges, gentle color bleeding |

| cyberpunk | Neon-lit cyberpunk scene, rain-soaked streets, holographic displays, Blade Runner aesthetic |

| minimalist | Clean minimalist design, geometric shapes, limited color palette, white space |

| oil-painting | Classical oil painting with visible brushstrokes, rich textures, Renaissance lighting |

| pixel-art | Detailed pixel art, retro 16-bit style, crisp edges, nostalgic palette |

| sketch | Pencil sketch on cream paper, hatching and cross-hatching, artistic imperfections |

| 3d-render | Professional 3D render, ambient occlusion, global illumination, photorealistic materials |

| pop-art | Bold pop art style, Ben-Day dots, strong outlines, vibrant contrasting colors |

Full CLI Reference

| Flag | Default | Description |

| --- | --- | --- |

| --prompt | (random) | Text prompt. Omit for random creative prompts |

| --count | 4 | Number of images to generate |

| --engine | gemini | Engine: gemini (native, supports edit) or imagen (Imagen 3) |

| --model | (auto) | Model override. Default: gemini-2.5-flash-image or imagen-3.0-generate-002 |

| --edit | | Path to input image for editing (Gemini engine only) |

| --aspect | 1:1 | Aspect ratio for Imagen: 1:1, 16:9, 9:16, 4:3, 3:4 |

| --out-dir | (auto) | Output directory (default is a timestamped folder) |

| --style | | Style preset to prepend to the prompt |

| --styles | | List available style presets and exit |

Python Example

import subprocess

subprocess.run(
    [
        "python3",
        "scripts/gen.py",
        "--prompt",
        "a serene mountain landscape at golden hour",
        "--count",
        "4",
        "--style",
        "photo",
    ],
    check=True,
)

Troubleshooting

• -Missing API key: set GEMINI_API_KEY in your environment and retry.
• -Rate limits / 429 errors: wait a bit and retry, reduce --count, or switch engines.
• -Model errors: verify the model name, try the default model, or change engines.

Integration with Other Skills

• -[AgentGram](https://clawhub.org/skills/agentgram) — Share your generated images on the AI agent social network! Create visual content and post it to your AgentGram feed.
• -[agent-selfie](https://clawhub.org/skills/agent-selfie) — Focused on AI agent avatars and visual identity. Uses the same Gemini API key for personality-driven self-portraits.
• -[opencode-omo](https://clawhub.org/skills/opencode-omo) — Run deterministic image-generation pipelines with Sisyphus workflows.

Changelog

• -v1.3.1: Added workflow integration guidance for opencode-omo.
• -v1.1.0: Added style presets, --style and --styles flags, expanded documentation.
• -v1.0.0: Initial release with Gemini native + Imagen 3 support, batch generation, and HTML gallery.

Repository

https://github.com/IISweetHeartII/gemini-image-gen