diff --git a/scripts/check-phase10.sh b/scripts/check-phase10.sh
index 6259690..19a9dd0 100755
--- a/scripts/check-phase10.sh
+++ b/scripts/check-phase10.sh
@@ -425,11 +425,12 @@ hygiene_checks() {
 	[[ -z "$hits" ]] || fail "admin/src/api/types.ts declares a shape instead of aliasing the generated schema: $hits"
 	hits="$(cd "$tree" && grep -nE '^export type [A-Za-z]+ = ' admin/src/api/types.ts | grep -vE "= (Schemas\['cabana\.[A-Za-z_-]+'\]|NonNullable<[A-Za-z]+Path\['get'\]\['parameters'\]\['query'\]>|[A-Za-z]+Path\['get'\]\['parameters'\]\['path'\])\$" || true)"
 	[[ -z "$hits" ]] || fail "admin/src/api/types.ts alias not onto the generated schema: $hits"
-	# Browser storage holds only the sidebar flag (T-10-22) and the per-list
-	# query parameters (T-16.1-03), never a token.
+	# Browser storage holds only the sidebar flag (T-10-22), the per-list
+	# query parameters (T-16.1-03) and the theme and locale codes
+	# (T-261016-0fm-08), never a token.
 	hits="$(cd "$tree" && grep -rnE 'localStorage|sessionStorage|indexedDB|document\.cookie' admin/src 2>/dev/null |
-		grep -v -e '^admin/src/state/useSidebar.ts:' -e '^admin/src/state/listState.ts:' || true)"
-	[[ -z "$hits" ]] || fail "browser storage outside admin/src/state/useSidebar.ts and admin/src/state/listState.ts: $hits"
+		grep -v -e '^admin/src/state/useSidebar.ts:' -e '^admin/src/state/listState.ts:' -e '^admin/src/state/usePreferences.ts:' || true)"
+	[[ -z "$hits" ]] || fail "browser storage outside admin/src/state/useSidebar.ts, admin/src/state/listState.ts and admin/src/state/usePreferences.ts: $hits"
 	# The embedded build loads nothing from another origin. Allowed literals are
 	# never requested: https://prosemirror.net is ProseMirror error text and
 	# https://admin.invalid the reserved-TLD parse base in isAllowedLink.