Twitchlint is an extension for Visual Studio Code that allows your Twitch viewers sent you suggestions for your code via the chat.
This extension connects to the Twitch chat (or any IRC server) and allows your viewers to issue commands to display suggestions right in your editor.
The syntax is as follows:
You can change the command in the settings, too.
If you want to use Twitch chat, you'll need an API token, e.g. from here.
See the Contributions tab.