unplugin-mcp

Overview

unplugin-mcp creates and manages an MCP server within build tools, enabling AI assistants to understand and control the build process. It provides bi-directional integration where AI can both receive context about the codebase and actively modify build configurations. The plugin offers several built-in tools for analyzing module dependencies, inspecting build configurations, and debugging errors, while also allowing developers to create custom tools through a simple interface.

Try asking AI

After installing, here are 5 things you can ask your AI assistant:

• ModuleTool

  Analyze module dependencies and imports

  Try:Show me the dependencies of this moduleTry:Find all imports in the project
• BuildConfigTool

  Inspect build configuration

  Try:Show me the current build configurationTry:Extract the webpack config options
• BuildErrorTool

  Debug build errors

  Try:Explain this build errorTry:Help me fix this compilation issue
• BundleSizeTool

  Inspect size of bundle and its modules

  Try:Show me the bundle size breakdownTry:Find the largest modules in the bundle

Comparable tools

Installation

# Install the plugin
pnpm add -D unplugin-mcp

# or install bundler-specific one
pnpm add -D rollup-plugin-mcp

{
  "mcpServers": {
    "rollup": {
      "url": "http://localhost:14514/mcp/sse"
    }
  }
}

FAQ

Which build tools are supported?

Currently supports Rollup, Webpack, Vite, ESBuild, Rspack, and Rolldown. More are planned.

Can I create custom MCP tools?

Yes, you can implement the UnpluginMcpTool interface to create custom tools that expose project-specific functionality.

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