karabiner.edn

{
  :layers {
    :caps_lock_mode {:key :caps_lock :alone {:key :escape}}
  }
  :main [
    {
      :des "Caps lock layer"
      :rules [
        :caps_lock_mode
          [:##h :left_arrow]
          [:##k :up_arrow]
          [:##j :down_arrow]
          [:##l :right_arrow]
          [:##delete_or_backspace :delete_forward]
      ]
    }
  ]
}