I guess that's created automatically with PHPStorm's "comment line" shortcut?

is it desired behavior that a template won’t be rendered if the template has an empty silverstripe comment???

In mildly related news, " (edited)" is now no longer added to the message, but part of the timestamp displayed on the friendly bot website 😄

I think the suggested subdomain solution would be a lot more what you want. {client}.{my-company}.com is a lot more goodlookin' as a domain than www.{my-company}.com/clientname 🙂