rbxdev-ls

Overview

rbxdev-ls is a comprehensive Luau language server and VS Code extension for Roblox development with MCP server capabilities. It extends beyond basic language support with strict type checking, completions, and unique live-game tooling through an executor bridge. The MCP server exposes 16 tools allowing AI assistants to browse game hierarchy, read/write properties, execute code, and interact with running Roblox games.

Try asking AI

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

• execute_code

  Execute Luau code in the Roblox game

  Try:Run this code in the game: print('Hello from AI!')Try:Execute the selected script in the game
• browse_game_tree

  Browse the Roblox game instance hierarchy

  Try:Show me the game's instance treeTry:List all services in the game
• read_property

  Read a property of a game instance

  Try:Get the position of workspace.partTry:Check the Text property of workspace.GUI.Label
• write_property

  Write a property of a game instance

  Try:Set the position of workspace.part to Vector3.new(0,10,0)Try:Change the text of workspace.GUI.Label to 'Hello'
• create_instance

  Create a new instance in the game

  Try:Create a new part at workspaceTry:Add a BillboardGui to the player's character
• clone_instance

  Clone an existing game instance

  Try:Clone workspace.partTry:Make a copy of the player's backpack
• delete_instance

  Delete an instance from the game

  Try:Remove workspace.partTry:Delete the player's current tool
• reparent_instance

  Move an instance to a different parent in the hierarchy

  Try:Move workspace.part to workspace.StorageTry:Change the parent of the player's character
• teleport_to

  Teleport to a specific game instance

  Try:Teleport to workspace.FinishLineTry:Go to the spawn location
• read_console_output

  Read the game's console output

  Try:Show me recent console outputTry:Check for errors in the game console
• get_instance_descendants

  Get all descendants of a specific instance

  Try:List all descendants of workspaceTry:Show me all parts in the game
• get_instance_children

  Get direct children of a specific instance

  Try:Show me the children of workspaceTry:List what's inside the player's backpack

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Installation

npm install -g @0neshot101/rbxdev-mcp

npx @0neshot101/rbxdev-mcp

{
  "mcpServers": {
    "rbxdev": {
      "command": "npx",
      "args": ["@0neshot101/rbxdev-mcp"]
    }
  }
}

FAQ

What is the executor bridge?

The executor bridge is a Luau script that runs inside a Roblox game and creates a WebSocket connection back to the language server, enabling live-game features like browsing the instance hierarchy and executing code.

Can I use this with AI assistants other than Claude?

Yes, the MCP server works with any MCP-compatible AI assistant including Cursor, Windsurf, and other tools that support the Model Context Protocol.

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