nano-banana-pro-pptx: AI-Generated Image Presentations#

Generate a PowerPoint presentation where every slide is a single full-bleed AI-generated image. Gemini handles both the narrative planning and image generation end-to-end.

Usage#

Run the script using absolute path (do NOT cd to skill directory first):

bash

uv run ~/.openclaw/workspace/skills/nano-banana-pro-pptx/scripts/generate_pptx.py \
  --prompt "your presentation topic" \
  --slides N \
  [--filename "output.pptx"] \
  [--resolution 1K|2K|4K] \
  [--api-key KEY] \
  [--base-url URL]

Arguments#

ArgumentRequiredDefaultDescription--promptYes—Topic/theme for the presentation--slidesYes—Number of slides (1–50)--filenameNoAuto-generated slugOutput .pptx filename or full path--resolutionNo1K``1K (1024px), 2K (2048px), 4K (4096px)--api-keyNo$GEMINI_API_KEYGemini API key--base-urlNo$GEMINI_BASE_URLCustom API base URL

The script checks for API key in this order:

1. --api-key argument (use if user provided key in chat)
2. GEMINI_API_KEY environment variable

If neither is available, the script exits with an error message.

The script checks for base URL in this order:

1. --base-url argument (use if user provided URL in chat)
2. GEMINI_BASE_URL environment variable

If neither is available, the script uses the default Gemini API base URL.

Instructions#

1. Always use the absolute path to the script — never cd to the skill directory
2. --slides is always required — ask the user if not provided
3. Default to --resolution 1K for drafts; suggest 2K for final output
4. Omit --filename to let the script auto-generate a slug from the prompt (do not construct the filename yourself)
5. Confirm the output file path to the user after completion
6. If GEMINI_API_KEY is not set in the environment, remind the user to set it or pass --api-key

Workflow#

1. Draft at 1K resolution to verify narrative and composition
2. Regenerate at 2K or 4K for final delivery

Environment Variables#

• GEMINI_API_KEY — required (or pass --api-key)
• GEMINI_BASE_URL — optional, for custom/proxy endpoints