name: nanobanana description: This skill provides image generation and editing capabilities using Google's Gemini 3 Pro model via the nanobanana CLI tool. Use this skill when users request AI image generation, image editing (style transfer, background removal, object manipulation), or when visual content needs to be created for projects. Also includes geminipro for Gemini 3 Pro text generation with optional reasoning display.

Nanobanana - AI Image Generation

Generate images using Gemini 3 Pro with automatic Cloudflare Images upload.

When to Use

User asks for AI-generated images
Need product photos, logos, illustrations
Creating visual content for projects
Image editing requests (style transfer, background removal)

Instructions

Generate an Image

Use --cloudflare (-c) to upload directly to Cloudflare Images and get a public URL:

nanobanana -c --json "your prompt here"

Output:

{
  "status": "complete",
  "url": "https://imagedelivery.net/QVGF5JnCzllQ8d17KIHS8g/<id>/public",
  "id": "uuid-here"
}

Local Save (Alternative)

If you need the file locally instead:

nanobanana --json "your prompt here"

Output:

{"status": "complete", "filepath": "/Users/pete/.nanobanana/images/20260202.png"}

Custom Filename

nanobanana -c -o product-hero --json "product photography of sneakers"

Debugging

If generation fails, use --debug to see details:

nanobanana --debug "your prompt" 2>&1

Error Handling

Check the status field in JSON output:

result=$(nanobanana -c --json "prompt")
status=$(echo "$result" | jq -r '.status')

if [ "$status" = "complete" ]; then
  url=$(echo "$result" | jq -r '.url')
  echo "Generated: $url"
else
  error=$(echo "$result" | jq -r '.error')
  echo "Failed: $error"
fi

Common Errors

Error	Solution
"No cookies"	Run `cookie-refresh --setup` to extract cookies via browser login
"Could not find access token"	Cookies expired. Run `nanobanana --rotate --debug` to refresh. If 401, run `cookie-refresh --setup`
"Cloudflare upload failed"	Check API token in `~/.config/mr-tools/secrets.json`

Note: Cookie rotation is automatic — nanobanana rotates __Secure-1PSIDTS before each generation. A launchd task also runs daily at 3am. Full session re-auth (cookie-refresh --setup) is only needed when the primary __Secure-1PSID expires (rare, every few months).

nanobanana

SKILL.md