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Skills ZICQ category：Media nano-banana-pro-openrouter

Nano Banana Pro Openrouter

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.

9907 installs

Official URL：skills.sh

What this skill does

Intro in this page language first. The official description stays in its original wording; we do not rewrite SKILL.md.

What it does

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.

When to use it

The official description does not include a separate “Use when”. Per the spec, agents activate this skill when the task matches keywords in that description.

How agents load it

Per Agent Skills progressive disclosure: name and description load at startup (~100 tokens); the full SKILL.md body loads when the skill activates; scripts/, references/, and assets/ load only as needed. This file's sections: Nano Banana Pro OpenRouter; Overview; Prompt-only generation; Edit a single image; Compose multiple images; Resolution.

File analysis

File analysis: besides SKILL.md, the body references scripts/generate_image.py, assets/SYSTEM_TEMPLATE. Those resources load on demand.

Nano Banana Pro OpenRouterOverviewPrompt-only generationEdit a single imageCompose multiple imagesResolutionSystem prompt customizationBehavior and constraintsTroubleshooting

Source category：skills.sh agent-skill

Sources & links

Market sources：skills.sh

Full package on GitHub

OSS Skill ranking

SKILL.md & Agent activation

Official spec ↗
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.
  1. DiscoverThe client exposes names and descriptions to the agent.
  2. ActivateYour request or the task context selects the skill and loads its instructions.
  3. Load resourcesReferenced scripts, documentation and assets are used when needed.
Files referenced by the instructions · 2
  • scripts/generate_image.py
  • assets/SYSTEM_TEMPLATE

These paths are extracted from the text. Check the upstream package to verify the files exist.

Invocation syntax and available tools depend on your Agent client. Client integration guide ↗

Install this skill

Skills CLI ↗

Choose the target agent and installation scope, keep referenced package files, then verify the skill appears in the client's catalog.

This skill references supporting files. Retrieve the complete directory from the source; copying SKILL.md alone may leave missing dependencies.

Ask your Agent to install

Copy these instructions to a compatible agent and confirm the target directory matches your client.

Install the agent skill "nano-banana-pro-openrouter" into my project. The full SKILL.md and official description are at https://zicq.com/en/skills/skl-57ea7cacb6b4781f-Nano-Banana-Pro-Openrouter.html
Save it as .cursor/skills/nano-banana-pro-openrouter/SKILL.md or .claude/skills/nano-banana-pro-openrouter/SKILL.md and keep the frontmatter name and description exactly as-is.
This skill also ships scripts/, references/, or assets/ — fetch the whole folder from https://github.com/github/awesome-copilot instead of creating only a SKILL.md.

Full package on GitHub ↗

Install from the terminal · Skills CLI

Requires Node.js and npx. First inspect the repository's skill list to confirm the name.

npx skills add 'https://github.com/github/awesome-copilot' --list

npx skills add 'https://github.com/github/awesome-copilot' --skill 'nano-banana-pro-openrouter'

The CLI lets you choose the agent interactively. The default scope is the project; use -g for user scope. Confirm package availability with the discovery command, then use npx skills list to inspect installed skills.

Readable layout
--- 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: ` 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 . | 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.

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