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QWEN.md

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+# Qwen Code Context: Node.js MCP Server
+
+## Project Overview
+This is a Node.js-based Model Context Protocol (MCP) server implementation that provides tools for external clients to interact with. The server uses the `@modelcontextprotocol/sdk` to implement the MCP specification and offers tools like greeting and weather information retrieval.
+
+## Project Structure
+- `index.js`: Main server implementation containing tool registrations and server startup logic
+- `package.json`: Project metadata and dependencies
+- `package-lock.json`: Dependency lock file
+- `node_modules/`: Project dependencies
+
+## Key Dependencies
+- `@modelcontextprotocol/sdk`: Core SDK for MCP implementation
+- `zod`: For runtime type checking and validation of tool parameters
+
+## Architecture
+The server implements the Model Context Protocol and registers two tools:
+1. `say_hello`: A simple greeting tool that takes a name and returns a personalized greeting
+2. `get_weather`: A weather information tool that fetches current weather data for a given city using WeatherAPI
+
+## Building and Running
+- To run the server: `node index.js`
+- The server uses stdio transport for communication with clients
+- For the weather tool to work, a `WEATHER_API_KEY` environment variable must be set
+
+## Development Conventions
+- Uses ES modules (indicated by "type": "module" in package.json)
+- Implements async/await for handling asynchronous operations
+- Uses Zod for parameter validation
+- Includes proper error handling for robust operation
+- Logs important messages to stderr to separate them from data output
+- Follows MCP specification for return value formatting
+
+## Configuration
+The weather tool requires a `WEATHER_API_KEY` environment variable to be set to access the weather API service.
+
+## Purpose
+This project serves as an example MCP server implementation that demonstrates how to register and implement tools that can be called by MCP-compatible clients. It's designed to be extensible for adding more tools as needed.
+
+
+Always respond in 中文