Hi
It's nice tool!
but, there may be too few annotation types.
`'HACK', 'OPTIMIZE' is exist in ruby style guide (<a href="https://github.com/rubocop-hq/ruby-style-guide" rel="nofollow">https://github.com/rubocop-hq/ruby-style-guide</a>).
Can't add they? or make to able to add they by user them self.