platform/packages/platform-rig/profiles/assets/config/heft.json

{
  "$schema": "https://developer.microsoft.com/json-schemas/heft/heft.schema.json",

  "eventActions": [
    {
      "actionKind": "deleteGlobs",  
      "heftEvent": "clean",
      "actionId": "defaultClean",
      "globsToDelete": ["dist", "lib", "temp"]
    },
    {
      "actionKind": "copyFiles",
      "heftEvent": "pre-compile",
      "actionId": "copy-lang",
      "copyOperations": [
        {
          "sourceFolder": "src",
          "destinationFolders": ["lib"],
          "includeGlobs": ["lang"]
        }
      ]
    }
  ],
  "heftPlugins": [
    {
      "plugin": "@rushstack/heft-jest-plugin"
    }
  ]
}