In the past weeks I worked on a coding standard validator, meant
replacement for PHPCS, which includes the ZF2 coding standard as
default. So far, only about 30% of the standard are covered, but
tool is already usable. To my knowledge, those 30% already cover
over 95% of the current violations in the ZF2 source code.
This means you can already start using it, but keep an eye on the
repository for new updates: