After a document edit, recompute a contiguous window around it, not the attention-important positions.

arXiv 2609.17983 formulates stale KV-cache repair as budgeted recomputation and compares training-free position-selection policies on a factual RAG benchmark with matched direct and derived edits. All policies handle direct edits; derived edits separate them, and at the primary budget a contiguous edit-local window recovers at least 0.94 of the post-edit answer margin, substantially beating attention-based, KV-deviation and structural selectors. The mechanism is that scattered positions inherit surrounding staleness even when they look important under clean-state transplantation, and the advantage depends on adjacency, largely disappearing when the answer text sits downstream.