BU87 Residual Mis-Pruning and the Co-Admissive Repository under B_U Short-Window Utility, Retainable Residual Structures, Same Settlement Surface, Grammar Consistency, and ReAdmission of Weak Persistent Morphisms

BU87 develops the theory of residual mis-pruning and the co-admissive repository under the B_U framework. Its central claim is that residuals are not automatically waste. Backward-mirror systems often treat residue, friction, delay, weak signal, local inefficiency, low-frequency recurrence, or task-window mismatch as harmful noise to be removed. BU87 argues that this cleaning impulse can destroy retainable structures before their settlement window opens. Residuals must therefore be classified, not blindly eliminated. The paper establishes a threefold residual classification. The first class is harmful bias: structures that continuously introduce semantic drift, task drift, constraint drift, or settlement…