Affinity Studio now free

I haven't seen it mentioned anywhere, but the application bundle on macOS hints at a pretty robust scripting API using Javascript. The functionality doesn't seem to be exposed from what I can see in the app.

  /Applications/Affinity.app/Contents/Resources/JSLib
  ├── application.js
  ├── artboardinterface.js
  ├── artboardproperties.js
  ├── baseboxinterface.js
  ├── brushfillinterface.js
  ├── buffer.js
  ├── collection.js
  ├── colours.js
  ...
  ├── units.js
  ├── vectorbrush.js
  └── visibilityinterface.js