nano-banana-pro-openrouter

github/awesome-copilot · skills/nano-banana-pro-openrouter/SKILL.md

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.

Data & AINo license★ 38398⑂ 4850commit f11a4e4

Install skillView source on GitHub

What this skill does

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.

Installation

Copy a source-pinned command for your client. You run it yourself.

Destination: .claude/skills/nano-banana-pro-openrouter · pinned to the source commit

# Run from your project root
git clone https://github.com/github/awesome-copilot.git .skillboard-tmp
git -C .skillboard-tmp checkout f11a4e441c5ff061b4f8ae37952be8c602e4034e
mkdir -p ".claude/skills"
cp -r ".skillboard-tmp/skills/nano-banana-pro-openrouter" ".claude/skills/"
rm -rf .skillboard-tmp

Review the source before running. This copies files into your project; it is not a one-click install and does not verify runtime safety.

New here? Step-by-step setup – from installing the agent to using the skill

Operating systemAgentI already use Claude Code

1
Install Git
Install Git with your package manager (Debian/Ubuntu shown; use dnf/pacman on others). Official download.
```
sudo apt update && sudo apt install -y git
```
2
Install Claude Code
Requires Node.js 18+. Install the CLI globally: Official docs. (command-line tool)
```
npm install -g @anthropic-ai/claude-code
```

Get the skill, pinned to its exact version

Open a terminal and run these steps (they clone the source, check out the exact commit, and copy the skill into place):

# Run from your project root
git clone https://github.com/github/awesome-copilot.git .skillboard-tmp
git -C .skillboard-tmp checkout f11a4e441c5ff061b4f8ae37952be8c602e4034e
mkdir -p ".claude/skills"
cp -r ".skillboard-tmp/skills/nano-banana-pro-openrouter" ".claude/skills/"
rm -rf .skillboard-tmp

Destination: .claude/skills/nano-banana-pro-openrouter

4
Use it in Claude Code
Open Claude Code in your project. It reads skills from the folder above, so nano-banana-pro-openrouter is now available. Always review the source before using it – static checks cannot prove runtime safety.

Security & Audits

Scanner static-checks@0.1.0 · commit f11a4e441c5f. Static checks cannot prove runtime safety – review the source and the exact diff before installing. How checks work.

highCredential or secret access
References credentials, tokens or secret files that a skill should not need.
Evidence: [redacted]· fingerprint ccae6d912a41bfef
mediumNetwork fetch
Fetches remote content at runtime, which can change after review.
Evidence: curl· fingerprint 427e4b79b1f0fc90

nano-banana-pro-openrouter

github/awesome-copilot · skills/nano-banana-pro-openrouter/SKILL.md

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.

Data & AINo license★ 38398⑂ 4850commit f11a4e4

Install skillView source on GitHub

What this skill does

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:

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.

Installation

Copy a source-pinned command for your client. You run it yourself.

Destination: .claude/skills/nano-banana-pro-openrouter · pinned to the source commit

# Run from your project root
git clone https://github.com/github/awesome-copilot.git .skillboard-tmp
git -C .skillboard-tmp checkout f11a4e441c5ff061b4f8ae37952be8c602e4034e
mkdir -p ".claude/skills"
cp -r ".skillboard-tmp/skills/nano-banana-pro-openrouter" ".claude/skills/"
rm -rf .skillboard-tmp

Review the source before running. This copies files into your project; it is not a one-click install and does not verify runtime safety.

New here? Step-by-step setup – from installing the agent to using the skill

Operating systemAgentI already use Claude Code

1
Install Git
Install Git with your package manager (Debian/Ubuntu shown; use dnf/pacman on others). Official download.
```
sudo apt update && sudo apt install -y git
```
2
Install Claude Code
Requires Node.js 18+. Install the CLI globally: Official docs. (command-line tool)
```
npm install -g @anthropic-ai/claude-code
```

Get the skill, pinned to its exact version

Open a terminal and run these steps (they clone the source, check out the exact commit, and copy the skill into place):

# Run from your project root
git clone https://github.com/github/awesome-copilot.git .skillboard-tmp
git -C .skillboard-tmp checkout f11a4e441c5ff061b4f8ae37952be8c602e4034e
mkdir -p ".claude/skills"
cp -r ".skillboard-tmp/skills/nano-banana-pro-openrouter" ".claude/skills/"
rm -rf .skillboard-tmp

Destination: .claude/skills/nano-banana-pro-openrouter

4
Use it in Claude Code
Open Claude Code in your project. It reads skills from the folder above, so nano-banana-pro-openrouter is now available. Always review the source before using it – static checks cannot prove runtime safety.

Security & Audits

Scanner static-checks@0.1.0 · commit f11a4e441c5f. Static checks cannot prove runtime safety – review the source and the exact diff before installing. How checks work.

highCredential or secret access
References credentials, tokens or secret files that a skill should not need.
Evidence: [redacted]· fingerprint ccae6d912a41bfef
mediumNetwork fetch
Fetches remote content at runtime, which can change after review.
Evidence: curl· fingerprint 427e4b79b1f0fc90

nano-banana-pro-openrouter

What this skill does

Nano Banana Pro OpenRouter

Overview

Prompt-only generation

Edit a single image

Compose multiple images

Resolution

System prompt customization

Behavior and constraints

Troubleshooting

Installation

Install Git

Install Claude Code

Get the skill, pinned to its exact version

Use it in Claude Code

Security & Audits

nano-banana-pro-openrouter

What this skill does

Nano Banana Pro OpenRouter

Overview

Prompt-only generation

Edit a single image

Compose multiple images

Resolution

System prompt customization

Behavior and constraints

Troubleshooting

Installation

Install Git

Install Claude Code

Get the skill, pinned to its exact version

Use it in Claude Code

Security & Audits