When updating runtime snapshot tests for preview preact builds that carry named children props like $0 and slot-index semantics, keep list host snapshots isolated from surrounding view/text snapshots by creating a standalone __SNAPSHOT__(<list>{HOLE}</list>) and inserting it into the outer snapshot. Do not drop packages/react/runtime/__test__/list.test.jsx cases added on main; preserve nested-list recording and __DestroyLifetime callback cleanup assertions while adapting expectations to the new snapshot structure.