launch.json

{
  // Use IntelliSense to learn about possible attributes.
  // Hover to view descriptions of existing attributes.
  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Launch Extension",
      "type": "extensionHost",
      "request": "launch",
      "runtimeExecutable": "${execPath}", // open another instance of vs code
      "args": ["--extensionDevelopmentPath=${workspaceRoot}/vscode-extension"],
      "outFiles": ["${workspaceRoot}/vscode-extension/client/out/**/*.js"],
      "autoAttachChildProcesses": true,
      "preLaunchTask": { "type": "npm", "script": "watch" },
      "internalConsoleOptions": "openOnSessionStart",
      "env": { "DARKLANG_CLI_MODE": "debug" }
    }
  ]
}