Agent skill
nano-banana-image
Generate and edit images using Google's Gemini image generation models.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/other/nano-banana-image
SKILL.md
nano-banana-image
Generate and edit images using Google's Gemini image generation models.
When to use this skill
Use this skill when the user wants to:
- Generate images from text prompts
- Edit or transform existing images with instructions
- Create logos, illustrations, product photos, or any visual content
Usage
cd ~/.claude/skills/nano-banana-image
node scripts/nano_banana.js [options]
Options
| Flag | Description | Default |
|---|---|---|
--model |
Model to use: flash (fast) or pro (higher quality) |
flash |
--prompt |
Text prompt describing the image to generate | required |
--input |
Path to input image for editing (flash only) | none |
--out |
Output path for generated image | outputs/output.png |
--aspect |
Aspect ratio: 1:1, 16:9, 9:16, 4:3, 3:4 |
1:1 |
Models
| Model | API Name | Features |
|---|---|---|
flash |
gemini-2.5-flash-image |
Fast, supports image editing, good quality |
pro |
imagen-4.0-generate-001 |
Higher quality, text-to-image only |
Examples
Text to image:
node scripts/nano_banana.js \
--model flash \
--prompt "A clean minimalist ninja logo, bold outline, white background" \
--out outputs/logo.png
Widescreen background:
node scripts/nano_banana.js \
--model flash \
--aspect 16:9 \
--prompt "Abstract background with purple and blue gradients, geometric shapes" \
--out outputs/background.png
High quality generation:
node scripts/nano_banana.js \
--model pro \
--aspect 16:9 \
--prompt "A cinematic product photo of a smartwatch on a reflective surface" \
--out outputs/product.png
Edit existing image:
node scripts/nano_banana.js \
--model flash \
--input inputs/room.png \
--prompt "Restyle this room as modern Japanese minimalism" \
--out outputs/room_edited.png
How it works
- Script sends prompt to Gemini API with
responseModalities: ["TEXT", "IMAGE"] - Model generates image and returns base64-encoded data
- Script decodes and saves to output file
Requirements
- Node.js 18+
GEMINI_API_KEYenvironment variable (get one at Google AI Studio)
Setup
cd ~/.claude/skills/nano-banana-image
bun install
export GEMINI_API_KEY="your-key-here"
Rate Limits (Free Tier)
- ~2-3 images per day
- Resets at midnight Pacific Time
- Upgrade billing for higher limits
Recommended Agent Skills
Expand your agent's capabilities with these related and highly-rated skills.
majiayu000/claude-skill-registry
agent-ops-spec
Manage specification documents in .agent/specs/. Use when user provides requirements, acceptance criteria, or feature descriptions that need to be tracked and validated against implementation.
majiayu000/claude-skill-registry
agent-ops-state
Maintain .agent state files. Use at session start, after meaningful steps, and before concluding: read/update constitution/memory/focus/issues/baseline consistently.
majiayu000/claude-skill-registry
agent-ops-spec
Manage specification documents in .agent/specs/. Use when user provides requirements, acceptance criteria, or feature descriptions that need to be tracked and validated against implementation.
majiayu000/claude-skill-registry
agent-ops-testing
Test strategy, execution, and coverage analysis. Use when designing tests, running test suites, or analyzing test results beyond baseline checks.
majiayu000/claude-skill-registry
agent-ops-testing
Test strategy, execution, and coverage analysis. Use when designing tests, running test suites, or analyzing test results beyond baseline checks.
majiayu000/claude-skill-registry
agent-ops-state
Maintain .agent state files. Use at session start, after meaningful steps, and before concluding: read/update constitution/memory/focus/issues/baseline consistently.
Didn't find tool you were looking for?