figureslibres.cc/user/plugins/automagic-images/automagic-images.yaml

enabled: '1'
adapter: imagick
remove_original: '0'
sizes:
  -
    width: 640
    quality: 92
  -
    width: 1000
    quality: 90
  -
    width: 1500
    quality: 87
  -
    width: 2500
    quality: 85
  -
    width: 3500
    quality: 82

sizesattr:
  -
    class: 'default'
    directive: '100vw'
  -
    class: 'example'
    directive: '(min-width: 20em) 33%, 100vw'