Borrowing it
Nothing to install: this file belongs to Emily2040/nano-banana-image-skill. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Emily2040/nano-banana-image-skill/master/GEMINI.mdgit clone --depth 1 https://github.com/Emily2040/nano-banana-image-skillWrote 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/instructions/emily2040/nano-banana-image-skill/gemini-md)<a href="https://agentmods.dev/instructions/emily2040/nano-banana-image-skill/gemini-md"><img src="https://agentmods.dev/badge/instructions/emily2040/nano-banana-image-skill/gemini-md/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/instructions/emily2040/nano-banana-image-skill/gemini-md"><img src="https://agentmods.dev/badge/instructions/emily2040/nano-banana-image-skill/gemini-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00261 | $0.00261 |
| Opus 5 | $0.00130 | $0.00130 |
| Sonnet 5 | $0.00052 | $0.00052 |
| Haiku 4.5 | $0.00026 | $0.00026 |
Grade A, and why
nano-banana-image-skill GEMINI.md 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 11d 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.
What it actually says
Nano Banana Image Skill
This repository contains a portable image-prompting skill pack.
@./SKILL.md
Additional context
README.mdexplains installation and cross-agent usage.schemas/authoring-base.jsondefines the rich authoring contract.schemas/runtime-compact.jsondefines the compact runtime payload.skills/core/contains modular prompting logic.examples/provides valid sample inputs and outputs.
Guidance
- Keep responses concrete and model-aware.
- Prefer explicit composition, lighting, and layout instructions over generic quality filler.
- For edits, preserve unchanged elements explicitly before describing changes.
- When modifying the repo, keep
docs/intact and update examples with schema changes.
Gemini API/runtime notes
- Current public Gemini image generation docs use
generateContentand can return text parts plus inline image data. - Documented image model IDs include
gemini-3-pro-image-previewfor Nano Banana Pro,gemini-3.1-flash-image-previewfor Nano Banana 2 / V2, andgemini-2.5-flash-imagefor the legacy Nano Banana fast path. - Runtime payloads should keep prompt text, image config, source references, and provenance notes separate.
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.
- 11d ago First seen · 28 lines · 261 tokens per session scan A ebab3d7e2964
nano-banana-image-skill GEMINI.md is an instructions file published in the GitHub repository Emily2040/nano-banana-image-skill (30 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 261 tokens to every session, about $0.0013 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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