Nanobanana Skill

Generate or edit images via Google Gemini (nanobanana).

Install

npx skills add feiskyer/claude-code-settings --skill nanobanana-skill -g -a claude-code -y

Press to copy:C Claude CodeX CodexU CursorA Ask your agent

Repository: feiskyer/claude-code-settings1.7k
Category: Media
Updated: 1mo ago
License: MIT
Context cost: Lightabout 970 tokens
Runs scripts: Yes, review before use

What it does

Generate or edit images via Google Gemini (nanobanana). This is the DEFAULT image skill, use whenever the user asks to generate, create, or edit an image and does NOT name another provider. Triggers: "nanobanana", "generate image", "create image", "edit image", "图片生成", "生成图片", "AI绘图", "图片编辑". Do NOT use for diagrams (架构图/流程图/时序图), draw those with Mermaid or code instead.

Nanobanana Image Generation Skill

Generate or edit images using Google Gemini API through the nanobanana tool.

Requirements

GEMINI_API_KEY: Must be configured in ~/.nanobanana.env or export GEMINI_API_KEY=<your-api-key>
Python3 with dependent packages installed: google-genai, Pillow, python-dotenv. They could be installed via python3 -m pip install -r ${CLAUDE_SKILL_DIR}/requirements.txt if not installed yet.
Executable: ${CLAUDE_SKILL_DIR}/nanobanana.py

Instructions

For image generation

Ask the user for:
- What they want to create (the prompt)
- Desired aspect ratio/size (optional, defaults to 9:16 portrait)
- Output filename (optional, auto-generates UUID if not specified)
- Model preference (optional, defaults to gemini-3.1-flash-image-preview)
- Resolution (optional, defaults to 1K)

Run the nanobanana script with appropriate parameters:

python3 ${CLAUDE_SKILL_DIR}/nanobanana.py --prompt "description of image" --output "filename.png"

Show the user the saved image path when complete

For image editing

Ask the user for:
- Input image file(s) to edit
- What changes they want (the prompt)
- Output filename (optional)

Run with input images:

python3 ${CLAUDE_SKILL_DIR}/nanobanana.py --prompt "editing instructions" --input image1.png image2.png --output "edited.png"

Available Options

Aspect Ratios (--size)

1024x1024 (1:1) - Square
832x1248 (2:3) - Portrait
1248x832 (3:2) - Landscape
864x1184 (3:4) - Portrait
1184x864 (4:3) - Landscape
896x1152 (4:5) - Portrait
1152x896 (5:4) - Landscape
768x1344 (9:16) - Portrait (default)
1344x768 (16:9) - Landscape
1536x672 (21:9) - Ultra-wide

Models (--model)

gemini-3.1-flash-image-preview (default) - Latest, fast generation
gemini-3-pro-image-preview - Higher quality, supports thinking/reasoning

Resolution (--resolution)

Read the whole SKILL.md on GitHub