Align prompts and strengthen validation context

internal/framework/validators/protected_terms.go

@@ -186,3 +186,22 @@ func validateCapitalizationTransitions(beforeByID, afterByID map[int][]protected
 	}
 	return ""
 }
+
+// preservesRepeatedIdentities permits a spoken-word proposal to reduce repeated
+// mentions, but not remove an identity or replace its surviving spelling.
+// Editorial and meaning validators still decide whether the cleanup is warranted.
+func (v ProtectedVocabulary) preservesRepeatedIdentities(before, after string) bool {
+	original := v.occurrencesByIdentity(before)
+	result := v.occurrencesByIdentity(after)
+	reduced := false
+	for identity, occurrences := range original {
+		remaining := result[identity]
+		if len(remaining) == 0 {
+			return false
+		}
+		if len(remaining) < len(occurrences) {
+			reduced = true
+		}
+	}
+	return reduced && validateCapitalizationTransitions(original, result) == ""
+}