Write all todos in your inbox to a file on your desktop.

inbox

#!/usr/bin/env ruby

#gem install rb-scpt (ruby < 2.5.0)
require 'rb-scpt'

APP = Appscript.app("Things3.app")

def inbox
  APP.lists.get.detect{|l| l.name.get == 'Inbox'}
end

def todos
  inbox.to_dos.get
end

def todo_texts
  todos.map do |todo|
    [todo.name.get + todo.notes.get]
  end.flatten
end

def file_text
  todo_texts.select do |text|
    text.strip != ""
  end.join("\n")
end

def filepath
  ENV['HOME'] + "/Desktop/inbox.txt"
end

def write_to_file
  open(filepath, 'a') { |f|
    f.puts file_text
  }
end

write_to_file