nano-banana-pro-openrouter

该 Skill 通过脚本调用 OpenRouter 上的 Gemini 3 Pro Image 模型，实现纯提示词生图、单图编辑和最多三张图的多图合成；可用 --resolution 指定 1K/2K/4K，并读取 assets/SYSTEM_TEMPLATE 自定义系统提示词。运行依赖 uv 与 OPENROUTER_API_KEY 环境变量。

github

热度 0.00

最近更新 2026-10-18 22:10:22

分类：创作依赖：代码执行 / 第三方 API / 读写文件应用场景：图像生成

安装技能

复制下面的话术发给你的 Agent，它会通过 secure-skills 检索并安装该技能。

执行命令安装此 skill： npx secure-skills-cli add github/awesome-copilot/nano-banana-pro-openrouter

Metadata

name: nano-banana-pro-openrouter
description: Generate or edit images via OpenRouter with the Gemini 3 Pro Image model. Use for prompt-only image generation, image edits, and multi-image compositing; supports 1K/2K/4K output.
metadata: {"emoji":"🍌","requires":{"bins":["uv"],"env":["OPENROUTER_API_KEY"]},"primaryEnv":"OPENROUTER_API_KEY"}

Nano Banana Pro OpenRouter

Overview

Generate or edit images with OpenRouter using the google/gemini-3-pro-image-preview model. Support prompt-only generation, single-image edits, and multi-image composition.

Prompt-only generation

uv run {baseDir}/scripts/generate_image.py \
  --prompt "A cinematic sunset over snow-capped mountains" \
  --filename sunset.png

Edit a single image

uv run {baseDir}/scripts/generate_image.py \
  --prompt "Replace the sky with a dramatic aurora" \
  --input-image input.jpg \
  --filename aurora.png

Compose multiple images

uv run {baseDir}/scripts/generate_image.py \
  --prompt "Combine the subjects into a single studio portrait" \
  --input-image face1.jpg \
  --input-image face2.jpg \
  --filename composite.png

Resolution

Use --resolution with 1K, 2K, or 4K.
Default is 1K if not specified.

System prompt customization

The skill reads an optional system prompt from assets/SYSTEM_TEMPLATE. This allows you to customize the image generation behavior without modifying code.

Behavior and constraints

Accept up to 3 input images via repeated --input-image.
--filename accepts relative paths (saves to current directory) or absolute paths.
If multiple images are returned, append -1, -2, etc. to the filename.
Print MEDIA: <path> for each saved image. Do not read images back into the response.

Troubleshooting

If the script exits non-zero, check stderr against these common blockers:

Symptom	Resolution
`OPENROUTER_API_KEY is not set`	Ask the user to set it. PowerShell: `$env:OPENROUTER_API_KEY = "sk-or-..."` / bash: `export OPENROUTER_API_KEY="sk-or-..."`
`uv: command not found` or not recognized	macOS/Linux: curl -LsSf https://astral.sh/uv/install.sh \| sh. Windows: powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 \| iex". Then restart the terminal.
`AuthenticationError` / HTTP 401	Key is invalid or has no credits. Verify at https://openrouter.ai/settings/keys.

For transient errors (HTTP 429, network timeouts), retry once after 30 seconds. Do not retry the same error more than twice — surface the issue to the user instead.