A formal field in the CC-DATA-01 engagement record documenting every quarter in which any sovereignty perimeter’s schema entropy rate went negative — recording the maintenance gap that caused the forfeiture event, the correction applied, and its measured outcome. The posture forfeiture log makes forfeiture visible in the engagement record rather than masked by aggregate metrics, closing the contested-posture-invisibility failure mode at the engagement record level. Every engagement’s forfeiture log becomes proprietary training data for the CC-DATA-01 causal dataset: the longitudinal record of forfeiture events and corrections compounds across engagements, making each subsequent diagnostic sharper.