Nano Banana Pro

mkdir -p /tmp/openclaw-media && uv run {baseDir}/scripts/generate_image.py --prompt "combine these into one scene" --filename "/tmp/openclaw-media/output.png" -i img1.png -i img2.png -i img3.png

API key

• GEMINI_API_KEY env var
• Or set skills."nano-banana-pro".apiKey / skills."nano-banana-pro".env.GEMINI_API_KEY in ~/.openclaw/openclaw.json

Notes

• Resolutions: 1K (default), 2K, 4K.
• Use timestamps in filenames: yyyy-mm-dd-hh-mm-ss-name.png.
• Always use /tmp/openclaw-media/ as the output directory — images saved to the workspace or other directories WILL NOT be sent to the chat.
• Do not read the image back; report the saved path only.

CRITICAL: Sending images to chat

The script prints a MEDIA: line (e.g. MEDIA:/tmp/openclaw-media/image.png). You MUST include this exact line in your reply text for OpenClaw to auto-attach the image in Telegram/WhatsApp.

Correct reply example:

Here's your image!
MEDIA:/tmp/openclaw-media/my-image.png

Rules:

1. Find the MEDIA: line in the exec tool output
2. Copy that EXACT line into your reply text — do NOT modify it, do NOT put it in brackets, do NOT reformat it
3. MEDIA: must start at the beginning of a new line with NO spaces before or after the colon
4. Do NOT wrap it like [image: path] or ![](path) — that breaks it
5. Do NOT skip or summarize the MEDIA line
6. If you skip the MEDIA line, the user will NOT see the image — they will only see a useless file path as text