# Gemini MCP Server for Claude Code

A specialized Model Context Protocol (MCP) server that extends Claude Code's capabilities with Google's Gemini 2.5 Pro Preview, featuring a massive 1M token context window for handling large codebases and complex analysis tasks.

## 🎯 Purpose

This server acts as a developer assistant that augments Claude Code when you need:
- Analysis of files too large for Claude's context window
- Deep architectural reviews across multiple files
- Extended thinking and complex problem solving
- Performance analysis of large codebases
- Security audits requiring full codebase context

## 🚀 Quick Start for Claude Code

### 1. Configure in Claude Desktop

Add to your Claude Desktop configuration file:

**macOS**: `~/Library/Application Support/Claude/claude_desktop_config.json`
**Windows**: `%APPDATA%\Claude\claude_desktop_config.json`

```json
{
  "mcpServers": {
    "gemini": {
      "command": "/path/to/gemini-mcp-server/venv/bin/python",
      "args": ["/path/to/gemini-mcp-server/gemini_server.py"],
      "env": {
        "GEMINI_API_KEY": "your-gemini-api-key-here"
      }
    }
  }
}
```

### 2. Restart Claude Desktop

After adding the configuration, restart Claude Desktop. You'll see "gemini" in the MCP servers list.

### 3. Start Using Natural Language

Just talk to Claude naturally:
- "Use Gemini to analyze this large file..."
- "Ask Gemini to review the architecture of these files..."
- "Have Gemini check this codebase for security issues..."

## 💻 Developer-Optimized Features

### Automatic Developer Context
When no custom system prompt is provided, Gemini automatically operates with deep developer expertise, focusing on:
- Clean code principles
- Performance optimization
- Security best practices
- Architectural patterns
- Testing strategies
- Modern development practices

### Optimized Temperature Settings
- **General chat**: 0.5 (balanced accuracy with some creativity)
- **Code analysis**: 0.2 (high precision for code review)

### Large Context Window
- Handles up to 1M tokens (~4M characters)
- Perfect for analyzing entire codebases
- Maintains context across multiple large files

## 🛠️ Available Tools

### `chat`
General-purpose developer conversations with Gemini.

**Example uses:**
```
"Ask Gemini about the best approach for implementing a distributed cache"
"Use Gemini to explain the tradeoffs between different authentication strategies"
```

### `analyze_code`
Specialized tool for analyzing large files or multiple files that exceed Claude's limits.

**Example uses:**
```
"Use Gemini to analyze /src/core/engine.py and identify performance bottlenecks"
"Have Gemini review these files together: auth.py, users.py, permissions.py"
```

### `list_models`
Lists available Gemini models (defaults to 2.5 Pro Preview).

## 📋 Installation

1. Clone the repository:
   ```bash
   git clone https://github.com/BeehiveInnovations/gemini-mcp-server.git
   cd gemini-mcp-server
   ```

2. Create virtual environment:
   ```bash
   python3 -m venv venv
   source venv/bin/activate  # On Windows: venv\Scripts\activate
   ```

3. Install dependencies:
   ```bash
   pip install -r requirements.txt
   ```

4. Set your Gemini API key:
   ```bash
   export GEMINI_API_KEY="your-api-key-here"
   ```

## 🔧 Advanced Configuration

### Custom System Prompts
Override the default developer prompt when needed:
```python
{
  "prompt": "Review this code",
  "system_prompt": "You are a security expert. Focus only on vulnerabilities."
}
```

### Temperature Control
Adjust for your use case:
- `0.1-0.3`: Maximum precision (debugging, security analysis)
- `0.4-0.6`: Balanced (general development tasks)
- `0.7-0.9`: Creative solutions (architecture design, brainstorming)

### Model Selection
While defaulting to `gemini-2.5-pro-preview-06-05`, you can specify other models:
- `gemini-1.5-pro-latest`: Stable alternative
- `gemini-1.5-flash`: Faster responses
- Use `list_models` to see all available options

## 🎯 Claude Code Integration Examples

### When Claude hits token limits:
```
Claude: "This file is too large for me to analyze fully..."
You: "Use Gemini to analyze the entire file and identify the main components"
```

### For architecture reviews:
```
You: "Use Gemini to analyze all files in /src/core/ and create an architecture diagram"
```

### For performance optimization:
```
You: "Have Gemini profile this codebase and suggest the top 5 performance improvements"
```

## 📝 Notes

- Gemini 2.5 Pro Preview may occasionally block certain prompts due to safety filters
- The server automatically falls back gracefully when this happens
- Token estimation: ~4 characters per token
- All file paths should be absolute paths

## 🤝 Contributing

This server is designed specifically for Claude Code users. Contributions that enhance the developer experience are welcome!

## 📄 License

MIT License - feel free to customize for your development workflow.