Source profileQuality 71/100
github/awesome-copilot/skills/nano-banana-pro-openrouter/SKILL.md
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.
- Source repository stars
- 37,126
- Declared platforms
- 0
- Static risk flags
- 0
- Last source update
- 2026-07-28
- Source checked
- 2026-07-28
Decision brief
What it does—and where it fits
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.
Not for
- 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.
Compatibility matrix
Platform support, with evidence labels
| Platform | Status | Evidence | What to check |
|---|---|---|---|
| Codex | Not declared | No explicit evidence | Portability before use |
| Claude Code | Not declared | No explicit evidence | Portability before use |
| Cursor | Not declared | No explicit evidence | Portability before use |
| Gemini CLI | Not declared | No explicit evidence | Portability before use |
Installation
Inspect first. Install second.
The source command is displayed only when detected. A safe inspection prompt is always available so your agent can explain every action before execution.
Source-detected install commandSource
npx skills add https://github.com/github/awesome-copilot --skill "skills/nano-banana-pro-openrouter"Safe inspection promptEditorial
Inspect the Agent Skill "nano-banana-pro-openrouter" from https://github.com/github/awesome-copilot/blob/9933dcad5be5caeb288cebcd370eeeb2fc2f1685/skills/nano-banana-pro-openrouter/SKILL.md at commit 9933dcad5be5caeb288cebcd370eeeb2fc2f1685. List every install step, command, network request, credential, file read/write, external action, and rollback step. Explain whether it fits my task. Do not install or execute anything until I approve.
Workflow
What the source asks the agent to do
- 01
Prompt-only generation
Review the “Prompt-only generation” section in the pinned source before continuing.
Review and apply the “Prompt-only generation” source section. - 02
Edit a single image
Review the “Edit a single image” section in the pinned source before continuing.
Review and apply the “Edit a single image” source section. - 03
Compose multiple images
Review the “Compose multiple images” section in the pinned source before continuing.
Review and apply the “Compose multiple images” source section. - 04
Resolution
Use --resolution with 1K, 2K, or 4K.
Use --resolution with 1K, 2K, or 4K.Default is 1K if not specified.- Use --resolution with 1K, 2K, or 4K. - Default is 1K if not specified.
Permission review
Static risk signals and limitations
No configured static risk pattern was detected
This is not proof of safety. Runtime behavior, indirect dependencies, and hidden external systems are outside the static scan.
Evidence record
Why each signal appears
EvidenceSourceComputedTestedEditorial
| Signal | Value | Evidence type | Meaning |
|---|---|---|---|
| Quality score | 71/100 | Computed | Documentation, specificity, maintenance, and trust rules |
| Repository stars | 37,126 | Source | Repository attention, not individual Skill quality |
| Compatibility | 0 platforms | Source | Declared in the catalog source record |
| Usage guide | automated source guide | Editorial | Generated or reviewed according to the visible evidence level |
Pinned source
Provenance and original SKILL.md
- Repository
- github/awesome-copilot
- Skill path
- skills/nano-banana-pro-openrouter/SKILL.md
- Commit
- 9933dcad5be5caeb288cebcd370eeeb2fc2f1685
- License
- MIT
- Collected
- 2026-07-28
- Default branch
- main
View the original SKILL.md
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
--resolutionwith1K,2K, or4K. - Default is
1Kif 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. --filenameaccepts 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.