fix(confidence-engine): scope episode closure authority

lib/graph/decision-sufficiency.js

@@ -65,6 +65,45 @@ export function isUserConfirmationOfNoRemainingUncertainty(answer) {
   return false;
 }
 
+// ── Pure: decision-closure authority question predicate ───────────
+
+/**
+ * Determines whether a question explicitly asks the user whether any
+ * material uncertainty remains at the parent-decision level — i.e. the
+ * question grants closure authority when answered with confirmation.
+ *
+ * Bounded to the decision_threshold sufficiency-confirmation semantic family.
+ * Focused questions (supplier, budget, etc.) do NOT match even if they
+ * receive a confirming answer.
+ *
+ * Returns true only for:
+ *   - "Is there anything else material that could change which option is better?"
+ *     (the canonical product template)
+ *   - Questions using the closure-family pattern:
+ *       <remaining-uncertainty-phrase> + <closure-action-phrase>
+ *     (e.g. "remaining material uncertainty preventing this decision from being closed")
+ */
+export function isDecisionClosureAuthorityQuestion(question) {
+  const text = String(question || "");
+  const lower = text.toLowerCase();
+
+  // Direct match for the canonical decision_threshold sufficiency confirmation template
+  if (/change which option (is |was )?better/i.test(lower)) return true;
+
+  // Closure-family pattern: "remaining-uncertainty" + "closure-action" conjunction
+  const hasRemainingUncertainty = /any(?:thing)?\s+(?:else\s+)?(?:material\s+)?uncertain(?:ty|ces)/i.test(lower);
+  if (!hasRemainingUncertainty) return false;
+
+  const hasClosureAction = /\b(closure|close[sd]?|resolve[d]?)\b/i.test(lower);
+  if (hasClosureAction) return true;
+
+  // "remaining material uncertainty" + decision-referencing words
+  const hasDecisionRef = /(?:decision|deciding|disposition)\b/i.test(lower);
+  if (hasDecisionRef) return true;
+
+  return false;
+}
+
 // ── Pure: unresolved predicate ─────────────────────────────────
 
 /**