# LangChain & LlamaIndex Coding Assistant

A powerful **Coding Assistant** integrated into **Claude Code** via the [Model Context Protocol (MCP)](https://modelcontextprotocol.io/). 

This assistant specializes in fetching real-time, official documentation for **LangChain**, **LlamaIndex**, and **OpenAI**, ensuring your coding workflow in Claude is powered by the absolute latest API references and guides.

## Capabilities

- **Deep Documentation Search**: Instantly retrieves detailed documentation from:
  - 🦜️🔗 **LangChain** (`python.langchain.com/docs`)
  - 🦙 **LlamaIndex** (`docs.llamaindex.ai`)
  - 🤖 **OpenAI** (`platform.openai.com/docs`)
- **Context-Aware Coding**: Provides Claude with the exact context needed to write accurate code using these rapidly evolving libraries.
- **Seamless Integration**: Designed to work natively within the Claude Desktop environment.

## Prerequisites

- **Python 3.11+**
- **uv** (recommended) or pip
- **Serper API Key**: ([Get one free at serper.dev](https://serper.dev))

## Installation

1. **Clone the repository**:
   ```bash
   git clone <repository-url>
   cd documentation
   ```

2. **Install dependencies**:
   ```bash
   uv sync
   # Or using pip:
   pip install -e .
   ```

3. **Set up API Key**:
   Create a `.env` file in the project root:
   ```env
   SERPER_API_KEY=your_api_key_here
   ```

## Configuration for Claude Desktop

Add this to your `claude_desktop_config.json` (%APPDATA%\Claude\claude_desktop_config.json on Windows):

```json
{
  "mcpServers": {
    "coding-assistant": {
      "command": "uv",
      "args": [
        "--directory",
        "YOUR_ABSOLUTE_PATH_TO_PROJECT_DIR",
        "run",
        "main.py"
      ],
      "env": {
        "SERPER_API_KEY": "your_api_key_here"
      }
    }
  }
}
```

## Usage

Once configured, ask Claude questions directly in your chat:

> "How do I create a custom retrieval chain in LangChain?"

> "Show me the latest LlamaIndex vector store implementation."

> "What are the new parameters for OpenAI's chat completions?"

The assistant will fetch the latest docs and help you write the code.