hahaha this is super cool !
You can even have a secret convo in a text file. The other party you share it can edit it too !

https://hashtree.cc/#/nhash1qqszn8xqmu9cnz8auqek5k3nlg0tf4jtahkggnpxw657z0ms5t5q5ag9yzq5zq7m9ad05xyadyn3fej2nnjzaf7ce9twr7hnuekc0n5e23cl7pyl5cc/text.txt