Prompt Templates MCP Server

An MCP (Model Context Protocol) server that provides prompt templates for Java development in IntelliJ IDEA.

This server exposes the templates used in the Zest IntelliJ plugin as standardized prompts that can be used by any MCP-compatible client.

Features

The server provides the following prompt templates as MCP prompts:

1. JUnit Test Generation - Create comprehensive JUnit 4 or 5 test suites for Java classes
2. TODO Implementation - Generate implementations for TODO comments in Java code
3. Agent Prompt Builder - Build structured prompts for AI agents with system instructions, tools, and context

Installation

# Clone the repository
git clone https://github.com/your-username/prompt-templates-mcp.git
cd prompt-templates-mcp

# Install dependencies
npm install

# Build the project
npm run build

Usage with Claude for Desktop

You can configure Claude for Desktop to use this server.

1. Create or edit your Claude Desktop configuration file:

   • macOS/Linux: ~/Library/Application Support/Claude/claude_desktop_config.json
   • Windows: %AppData%\Claude\claude_desktop_config.json

2. Add the server configuration:

{
  "mcpServers": {
    "prompt-templates": {
      "command": "node",
      "args": [
        "/ABSOLUTE/PATH/TO/prompt-templates-mcp/build/index.js"
      ]
    }
  }
}

3. Restart Claude for Desktop

Available Prompts

1. Generate JUnit Test

Generate comprehensive JUnit test suites for Java classes.

Parameters:

• packageName: Package name for the test class
• className: Name of the class to be tested
• imports: Imports from the original class
• junitVersion: JUnit version to use ("JUnit 4" or "JUnit 5")
• classContext: Context information about the class
• hasMockito: Whether Mockito is available (optional, default: false)

Example:

/prompt generate_junit_test packageName="com.example.app" className="UserService" imports="import java.util.List;\nimport java.util.ArrayList;" junitVersion="JUnit 5" classContext="public class UserService { ... }" hasMockito=true

2. Implement TODOs

Generate implementations for TODO comments in Java code.

Parameters:

• selectedText: Code containing TODOs to implement
• codeContext: Additional context about the code
• relatedClassContext: Map of related class names to their implementations (optional)

Example:

/prompt implement_todos selectedText="public class UserValidator {\n    public boolean isValidEmail(String email) {\n        // TODO: Implement email validation\n        return false;\n    }\n}" codeContext="This class is used to validate user information in the system."

3. Build Agent Prompt

Build a complete prompt for the agent with system instructions, tools, context, and user request.

Parameters:

• userRequest: The user's request
• tools: List of available tools with examples
• conversationHistory: Previous conversation messages
• codeContext: Code context information
• ragKnowledge: Optional knowledge from RAG system (optional)

Example:

/prompt build_agent_prompt userRequest="Help me fix the null pointer exception in my UserService class" tools=[{"name":"read_file","description":"Read file content","category":"File Operations","exampleParams":{"path":"src/main/java/com/example/UserService.java"}}] conversationHistory=["User: Can you help me with my Java code?", "Assistant: Of course! What do you need help with?"] codeContext={"currentFile":"UserService.java","currentProject":"UserManagement"}

Development

# Install dependencies
npm install

# Build the project
npm run build

# Run the server
npm start

# Run the example client
npm run example

Testing

The repository includes a test script to verify the server is working properly:

# On Windows
test-server.bat

# On Linux/macOS
chmod +x test-server.sh
./test-server.sh

License

MIT