What is gemini-grounding CLAUDE.md?

Project instructions for an MCP server, a small service that lets Claude Code use Google's Gemini to find current information online and in developer resources.

Use them when developing, compiling, running, or configuring the Gemini search server and its four search tools.

They explain how the project is organized, configured, built, and run, reducing setup and development mistakes.

How epilande/gemini-grounding configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to epilande/gemini-grounding. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/epilande/gemini-grounding/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/epilande/gemini-grounding

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/epilande/gemini-grounding/claude-md/github.svg)](https://agentmods.dev/instructions/epilande/gemini-grounding/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/epilande/gemini-grounding/claude-md"><img src="https://agentmods.dev/badge/instructions/epilande/gemini-grounding/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/epilande/gemini-grounding/claude-md"><img src="https://agentmods.dev/badge/instructions/epilande/gemini-grounding/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 782 This file is loaded in full into every session.

When invoked 782 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00782	$0.00782
Opus 5.5	$0.00313	$0.00313
Sonnet 5.5	$0.00156	$0.00156
Haiku 4.5	$0.00078	$0.00078

Measured 2mo ago against content hash f815b674c129, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

gemini-grounding 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 2mo 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.

CLAUDE.md · 91 lines

How it starts

The opening of the file, as written. The whole thing — 91 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

This is a Model Context Protocol (MCP) server that enables Claude Code to access real-time information through Google Gemini's native grounding capabilities. The server provides four specialized search tools for web search, developer resources, documentation lookup, and Reddit community discussions.

Development Commands

# Development (auto-reload)
pnpm dev

# Build TypeScript to JavaScript
pnpm run build

# Run compiled server
pnpm start

Environment Setup

Required environment variable:

GEMINI_API_KEY: Google Gemini API key (get from Google AI Studio)

Copy .env.example to .env and add your API key.

MCP Configuration

The server is configured via .mcp.json for integration with Claude Code:

Server name: gemini-grounding
Entry point: build/index.js
Includes environment variable mapping for GEMINI_API_KEY

Code Architecture

Core Components

src/index.ts: Main MCP server implementation

GroundingMCPServer class handles MCP protocol
Registers four tools: search_with_grounding, search_developer_resources, search_documentation, search_reddit
Uses stdio transport for communication with Claude Code
Uses gemini-2.5-flash model for responses

src/gemini-client.ts: Gemini API client

GeminiGroundingClient class manages Gemini API interactions
Implements intelligent prompt engineering based on search focus
Handles response formatting with automatic source citations
Provides developer query enhancement and Reddit search filtering

Tool Implementation

The server provides four specialized search tools:

search_with_grounding: General search with intelligent focus
- Parameters: query (required), context (optional), focus (optional)
- Focus options: "general", "code", "documentation", "troubleshooting"

Read the full file on GitHub · 91 lines

Changes

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.

2mo ago First seen · 91 lines · 782 tokens per session scan A f815b674c129

Subscribe to this mod's changes

gemini-grounding CLAUDE.md is an instructions file published in the GitHub repository epilande/gemini-grounding (8 stars, last pushed 1y ago), licensed MIT. It adds 782 tokens to every session, about $0.0031 per session on Opus 5.5. 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 2026-08-31.

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gemini-grounding: Instructions file for Claude Code