Borrowing it
Nothing to install: this file belongs to YCSE/nanobanana-mcp. 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/YCSE/nanobanana-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/YCSE/nanobanana-mcpWrote 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/ycse/nanobanana-mcp/claude-md)<a href="https://agentmods.dev/instructions/ycse/nanobanana-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/ycse/nanobanana-mcp/claude-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/ycse/nanobanana-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/ycse/nanobanana-mcp/claude-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 | $0.00923 | $0.00923 |
| Opus 5 | $0.00462 | $0.00462 |
| Sonnet 5 | $0.00185 | $0.00185 |
| Haiku 4.5 | $0.00092 | $0.00092 |
Grade A, and why
nanobanana-mcp CLAUDE.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.
How it starts
The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
NanoBanana MCP is a Model Context Protocol server that enables Claude Desktop/Code to use Google Gemini's multimodal capabilities for image generation, editing, and vision analysis.
Build Commands
npm install # Install dependencies
npm run build # Compile TypeScript to dist/
npm run dev # Development mode with hot reload (tsx watch)
npm run start # Run compiled server
Architecture
Single-file MCP server (src/index.ts) using stdio transport:
- MCP SDK Integration: Uses
@modelcontextprotocol/sdkfor server/transport - Dual Gemini SDKs:
@google/generative-ai(genAI) - For chat operations@google/genai(genAINew) - For image generation/editing with streaming
Tools Exposed
| Tool | Model | Purpose |
|---|---|---|
set_aspect_ratio |
N/A | Required before image generation/editing. Set aspect ratio for session |
set_model |
N/A | Switch between flash/pro models at runtime |
gemini_chat |
configurable | Multi-turn conversation with up to 10 images |
gemini_generate_image |
configurable | 2K image generation with consistency support |
gemini_edit_image |
configurable | Image editing via natural language |
get_image_history |
N/A | View session image history |
clear_conversation |
N/A | Reset conversation context |
Aspect Ratio (Required)
Valid values: 1:1, 9:16, 16:9, 3:4, 4:3, 3:2, 2:3, 5:4, 4:5, 21:9
Must call set_aspect_ratio before gemini_generate_image or gemini_edit_image. No default value - returns error if not set.
Runtime Model Selection
Use set_model tool to switch models per-session without restarting:
model="flash"→ gemini-3.1-flash-image-preview (faster, default)model="pro"→ gemini-3-pro-image-preview (higher quality)
Slash Commands:
- Claude Code:
cp commands/claude-code/*.md ~/.claude/commands/ - Cursor:
cp commands/cursor/*.md ~/.cursor/commands/ /nb-flash- Switch to Flash model/nb-pro- Switch to Pro model
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 · 94 lines · 923 tokens per session scan A b02c7a7eaf84
nanobanana-mcp CLAUDE.md is an instructions file published in the GitHub repository YCSE/nanobanana-mcp (32 stars, last pushed 6mo ago), licensed MIT. It adds 923 tokens to every session, about $0.0046 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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