Disclaimer: Modding the discord client is against Discord's term of service. I'm not responsible if any action is taken against you.
Modding the client will allow you to customize to:
- change the appearance of the discord client
- have script to automaticaly send messages at specific times
- log messages from a chat into a local file
This guide will explain how to inject js code into the discord client and send messages. I'm assuming you know you to write javascript code and are using Windows.