I am former java enterprise dev, so yes I often code this way. Unit testing, decomposition... Some projects CI refuse to merge commits with 20 line loop and duplicated code...

But that is not a point. Claude can code tight compact loops, it just needs to be instructed to do so! If it does "enterprise code", it means it had no instructions about code style.

If your documentation, spec, agent.md does not have proper guidance on coding style... yet another red flag!