The classic tech interview ambush! You're told "come as you are" for the interview, so you show up in your comfy black hoodie and jeans like a proper developer. Meanwhile, the interviewer is sitting there in full business attire looking at you like you just committed a merge conflict to production.
This is the software engineering equivalent of a trap card. The unwritten rule of tech interviews: dress code is simultaneously "casual" and "business professional" until observed, existing in a quantum superposition that collapses into "wrong" the moment you make a choice.