fix(reasoning): ask for missing sufficiency confirmation

lib/graph/question-formulator.js

@@ -1,3 +1,8 @@
+import {
+  hasRemainingMaterialFactors,
+  isUserConfirmationOfNoRemainingUncertainty,
+} from "./decision-sufficiency.js";
+
 function normaliseText(value) {
   return String(value || "")
     .toLowerCase()
@@ -1997,6 +2002,42 @@ export function formulateQuestion({ node, graph, context = {} }) {
     };
   }
 
+  // ── State B: unresolved decision with zero remaining factors but
+  //     no explicit sufficiency confirmation yet ────────────────
+  // Detected transiently from existing state; no persisted field required.
+  if (
+    reasoningPatternSelection.pattern === "decision" &&
+    node.kind !== "unknown" &&
+    node.status !== "known" &&
+    node.status !== "resolved" &&
+    node.status !== "contradicted" &&
+    hasRemainingMaterialFactors(node.id, graph) === false
+  ) {
+    const resolved = context.resolvedValues || [];
+    const hasConfirmation = resolved.some((v) =>
+      isUserConfirmationOfNoRemainingUncertainty(v),
+    );
+
+    if (!hasConfirmation) {
+      return {
+        question:
+          "Is there anything else material that could change which option is better?",
+        reason:
+          "All represented material factors are resolved but explicit sufficiency confirmation has not yet been provided.",
+        strategy: null,
+        investigationStrategy: null,
+        reasoningPattern: reasoningPatternSelection.pattern,
+        reasoningPatternReason: reasoningPatternSelection.reason,
+        questionFamily: "decision_threshold",
+        allowedQuestionFamilies,
+        rejectedQuestionFamilies,
+        selectedQuestionTemplate: "decision_threshold_sufficiency_confirmation",
+        questionComplexity: null,
+        plainLanguageNormalisations: [],
+      };
+    }
+  }
+
   const investigationStrategy = selectInvestigationStrategy({
     node,
     graph,