Patternlab is a dynamic organizational and prototyping tool for Drupal theming. By theming with pattern lab, your custom theme allows us to manage and build components in accordance with the required workflow using atomic design concepts1.
Using Pattern Lab for Drupal 8 Theming
Instead of rendering default Drupal templates, we can introduce pattern lab to include twig files using atomic concepts. It allows us to include external twig files by overriding the specific templates.