8000 Stimulus MCP Server by marcoroth · Pull Request #559 · marcoroth/stimulus-lsp · GitHub
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Stimulus MCP Server #559

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Stimulus MCP Server #559

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@marcoroth marcoroth commented May 18, 2025

This pull request introduces a new project, stimulus-mcp-server, which is a basic MCP server implementation for Stimulus.

Currently, it bootstraps a few MCP tools for asking Stimulus-related questions about your application:

  • check-stimulus-usage - Checks if a given app uses Stimulus.js
  • get-javascript-bundling-approach - Checks what kind of JavaScript bundling a Ruby on Rails application is using.
  • get-stimulus-application-file-path - Get the path of the Stimulus application file
  • get-stimulus-application-file-content - Get the content of the Stimulus application file
  • get-stimulus-controller-index-file-path - Get the path of the Stimulus controller index file
  • get-stimulus-controller-file-content - Get the content of a Stimulus controller file
  • get-stimulus-controller-file-path - Get the path of a Stimulus controller file
  • get-stimulus-controller-target-names - Get the Stimulus target names of a Stimulus controller
  • get-stimulus-controller-action-names - Get the Stimulus action names of a Stimulus controller
  • get-stimulus-controller-value-names - Get the Stimulus value names and types of a Stimulus controller
  • get-stimulus-controller-classes - Get the Stimulus classes of a Stimulus controller
  • get-stimulus-controller-possible-html-attributes - Get all possible and valid HTML attributes of a Stimulus controller
  • stimulus-controller-example-usage-documentation - Get the example usage documentation of a Stimulus controller
  • check-if-stimulus-controller-exists - Check if a Stimulus controller exists
  • check-if-stimulus-controller-is-registered-on-stimulus-application - Check if a Stimulus controller is registered on a Stimulus application
  • create-stimulus-controller - Create a new Stimulus controller
  • register-stimulus-controller-on-stimulus-application - Register a Stimulus controller on a Stimulus application
  • get-stimulus-controller-identifiers - Get a list of valid controller identifiers in an app/project that uses Stimulus

Setup

git clone https://github.com/marcoroth/stimulus-lsp
cd stimulus-lsp/mcp-server
yarn install
yarn build
realpath dist/index.js # use this path for the `args` below

Setting it up with Claude Desktop

Update ~/Library/Application\ Support/Claude/claude_desktop_config.json using the output from the realpath dist/index.js from above:

{
  "mcpServers": {
    "stimulus": {
      "command": "node",
      "args": [
        "/path/to/stimulus-lsp/mcp-server/dist/index.js"
      ]
    }
  }
}

Setting it up with Cursor:

Update ~/.cursor/mcp.json using the output from the realpath dist/index.js from above:

{
  "mcpServers": {
    "stimulus": {
      "command": "node",
      "args": [
        "/path/to/stimulus-lsp/mcp-server/dist/index.js"
      ]
    }
  }
}

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