Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Abilityai/cornelius --skill nano-banana-image-generatorgit clone --depth 1 https://github.com/Abilityai/corneliusWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/abilityai/cornelius/nano-banana-image-generator)<a href="https://agentmods.dev/skills/abilityai/cornelius/nano-banana-image-generator"><img src="https://agentmods.dev/badge/skills/abilityai/cornelius/nano-banana-image-generator/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/abilityai/cornelius/nano-banana-image-generator"><img src="https://agentmods.dev/badge/skills/abilityai/cornelius/nano-banana-image-generator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00049 | $0.01118 |
| Opus 5 | $0.00024 | $0.00559 |
| Sonnet 5 | $0.00010 | $0.00224 |
| Haiku 4.5 | $0.00005 | $0.00112 |
Grade A, and why
nano-banana-image-generator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Nano Banana Image Generator
Generate images using Google's Gemini 2.5 Flash Image model (codename: Nano Banana).
State Dependencies
| Source | Location | Read | Write | Description |
|---|---|---|---|---|
| Generate Script | ~/.claude/skills/nano-banana-image-generator/scripts/generate.sh |
✓ | Main generation script | |
| Thumbnail Script | ~/.claude/skills/nano-banana-image-generator/scripts/generate_thumbnail.py |
✓ | 16:9 thumbnail generator | |
| Image Script | ~/.claude/skills/nano-banana-image-generator/scripts/generate_image.py |
✓ | Python with aspect ratio control | |
| Best Practices | ~/.claude/skills/nano-banana-image-generator/best_practices.md |
✓ | Prompt engineering guidelines | |
| API Key | $GOOGLE_API_KEY or $GEMINI_API_KEY |
✓ | Required for API access | |
| Output Directory | $OUTPUT_DIR or current directory |
✓ | Where images are saved | |
| Generated Image | User-specified path | ✓ | Output PNG file |
Quick Start
Generate a simple image:
bash ~/.claude/skills/nano-banana-image-generator/scripts/generate.sh "A red apple on white background" apple.png
Generate a 16:9 thumbnail:
python3 ~/.claude/skills/nano-banana-image-generator/scripts/generate_thumbnail.py "YouTube thumbnail showing AI agents" /tmp/thumb.png
Generate with custom output directory:
OUTPUT_DIR=/tmp bash ~/.claude/skills/nano-banana-image-generator/scripts/generate.sh "Sunset over mountains" sunset.png
Scripts
| Script | Purpose | Output |
|---|---|---|
scripts/generate.sh |
General image generation | 1024x1024 PNG |
scripts/generate_thumbnail.py |
16:9 thumbnails | 1344x768 PNG |
scripts/generate_image.py |
Python with aspect ratio control | Configurable |
Pricing & Limits
- Cost: $0.039 per image
- Free tier: 500 requests/day
- Generation time: ~22 seconds
- Resolution: 1024x1024 (square), 1344x768 (16:9)
Best Practices
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 129 lines · 49 tokens per session scan A e1d63682b0f5
nano-banana-image-generator is a skill published in the GitHub repository Abilityai/cornelius (107 stars, last pushed today), licensed MIT. It adds 49 tokens to every session and 1,118 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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