Register B — Analytical Primary: ML engineers & product leads ~2,300 words Updated April 2026 Confidence That Cost$28,800We trusted our 0.94 confidence scores. We were right about confidence. We were wrong about what confidence means. Here’s what a CS lead’s spreadsheet taught us that three months of model monitoring didn’t.March 15202514:47“Oh fantastic, another ‘bug fix’ … Continue reading The 0.94 Confidence That Cost $28,800