Clojurians Log v2

Can anyone help me with meander? Imagine I want the first form to become the second:

{:tags [{:name "AAA"} {:name "BBB"}]}
->
{:tags ["AAA" "BBB"]}

(matcher
 {:pattern    '{:tags [{:name ?tag} ...]}
  :expression '{:tags [!tags]}})

Let me correct myself:

:tags  [{:name !tags} ...]
:tags  !tags

turned out, the exception pops up when the tags field is missing or nil. How can I correct the pattern so the nil tags produce either nil or an empty vector?

phew, it should have been (m/or nil [{:name !tags} ...])