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61 lines
2.0 KiB
Markdown
61 lines
2.0 KiB
Markdown
---
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name: nano-banana-pro-openrouter
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description: Generate or edit images via OpenRouter using openai-python with the Gemini 3 Pro Image model. Use for prompt-only image generation, image edits, and multi-image compositing; supports 1K/2K/4K output, saves results to the current working directory, and prints MEDIA lines.
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metadata:
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emoji: 🍌
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requires:
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bins:
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- uv
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env:
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- OPENROUTER_API_KEY
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primaryEnv: OPENROUTER_API_KEY
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---
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# Nano Banana Pro OpenRouter
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## Overview
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Generate or edit images with OpenRouter using the `google/gemini-3-pro-image-preview` model and the openai-python client. Support prompt-only generation, single-image edits, and multi-image composition. Save results to the current working directory and output MEDIA lines for easy attachment.
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### Prompt-only generation
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```
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uv run {baseDir}/scripts/generate_image.py \
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--prompt "A cinematic sunset over snow-capped mountains" \
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--filename sunset.png
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```
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### Edit a single image
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```
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uv run {baseDir}/scripts/generate_image.py \
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--prompt "Replace the sky with a dramatic aurora" \
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--input-image input.jpg \
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--filename aurora.png
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```
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### Compose multiple images
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```
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uv run {baseDir}/scripts/generate_image.py \
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--prompt "Combine the subjects into a single studio portrait" \
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--input-image face1.jpg \
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--input-image face2.jpg \
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--filename composite.png
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```
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## Resolution
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- Use `--resolution` with `1K`, `2K`, or `4K`.
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- Default is `1K` if not specified.
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## System prompt customization
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The skill reads an optional system prompt from `assets/SYSTEM_TEMPLATE`. This allows you to customize the image generation behavior without modifying code.
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## Behavior and constraints
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- Read the API key from `OPENROUTER_API_KEY` (no CLI flag).
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- Accept up to 3 input images via repeated `--input-image`.
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- Save output in the current working directory. If multiple images are returned, append `-1`, `-2`, etc.
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- Print `MEDIA: <path>` for each saved image. Do not read images back into the response. |