I have a final step that I wanna run, even if the test fail

do is a higher-level task, sounds like you want to impl your own high-level task for inspiration: https://github.com/technomancy/leiningen/blob/github/src/leiningen/do.clj

this namespace need to be AoT compiled or something like?

not really, just make a Lein plugin and include such a .clj file