Dev branch for the CloseAddons plugin for Dragory's ModMail
Make sure your running at least v3.0.3 of Modmail. in your config.ini file, make a new line and add:
plugins[] = npm:MMPlugins/MessageClose#dev
Restart your bot!
And that's it! Use: [prefix]messageclose in a thread (by default, your prefix is !) or [prefix]reasonclose to close with a reason and watch the magic!