Make a command like @infobot-list or similar name that would output a list of all keys for given channel. List should be only displayed in case that length of all keys (eg. resulting string) is not longer than 200 characters. In case the string is too long, display a trimmed list, or a link to webpage that contains all keys. I will leave that up to whoever wants to resolve this task. Example code that shows the link is here: https://github.com/benapetr/wikimedia-bot/blob/master/src/WMBot/Commands/Admin.cs#L368
Source code of infobot extension: https://github.com/benapetr/wikimedia-bot/tree/master/src/WMBot.Plugins/Infobot
This task requires advanced level of C#