fix: reselect after reasoning pattern filtering

lib/graph/orchestrator.js

@@ -71,6 +71,7 @@ function buildDiagnostics({
   compatibilityFailures,
   replacementActions,
   graphReasoningIntegrity,
+  noQuestionReason,
 }) {
   return {
     promptVersion: analysis?.promptVersion ?? null,
@@ -112,6 +113,28 @@ function buildDiagnostics({
     compatibilityFailures: compatibilityFailures ?? [],
     replacementActions: replacementActions ?? [],
     graphReasoningIntegrity: graphReasoningIntegrity ?? null,
+    noQuestionReason: noQuestionReason ?? null,
+  };
+}
+
+function fallbackStartCaseReasoningPatternValidation(
+  selectedQuestion,
+  existingValidation,
+) {
+  if (existingValidation) {
+    return existingValidation;
+  }
+
+  if (!selectedQuestion?.reasoningPattern) {
+    return null;
+  }
+
+  return {
+    activePattern: selectedQuestion.reasoningPattern,
+    valid: Boolean(selectedQuestion.question),
+    reason: selectedQuestion.question
+      ? "Initial graph-backed selection produced a reasoning-pattern-compatible question."
+      : "Initial graph-backed selection did not produce a valid question for the inferred reasoning pattern.",
   };
 }
 
@@ -443,8 +466,10 @@ export async function startCase(body) {
         reasoningPatternReason:
           initialQuestionResult.selectedQuestion?.reasoningPatternReason ??
           null,
-        reasoningPatternValidation:
-          initialQuestionResult.reasoningPatternValidation ?? null,
+        reasoningPatternValidation: fallbackStartCaseReasoningPatternValidation(
+          initialQuestionResult.selectedQuestion,
+          initialQuestionResult.reasoningPatternValidation,
+        ),
         patternCompatibleNodeCount:
           initialQuestionResult.patternCompatibleNodeCount ?? 0,
         incompatibleNodeIds: initialQuestionResult.incompatibleNodeIds ?? [],
@@ -453,6 +478,7 @@ export async function startCase(body) {
         replacementActions: initialQuestionResult.replacementActions ?? [],
         graphReasoningIntegrity:
           initialQuestionResult.graphReasoningIntegrity ?? null,
+        noQuestionReason: initialQuestionResult.noQuestionReason ?? null,
       }),
       validationErrors: graphReferenceValidation.errors,
       statusCode: 500,
@@ -509,8 +535,10 @@ export async function startCase(body) {
         null,
       reasoningPatternReason:
         initialQuestionResult.selectedQuestion?.reasoningPatternReason ?? null,
-      reasoningPatternValidation:
-        initialQuestionResult.reasoningPatternValidation ?? null,
+      reasoningPatternValidation: fallbackStartCaseReasoningPatternValidation(
+        initialQuestionResult.selectedQuestion,
+        initialQuestionResult.reasoningPatternValidation,
+      ),
       patternCompatibleNodeCount:
         initialQuestionResult.patternCompatibleNodeCount ?? 0,
       incompatibleNodeIds: initialQuestionResult.incompatibleNodeIds ?? [],
@@ -518,6 +546,7 @@ export async function startCase(body) {
       replacementActions: initialQuestionResult.replacementActions ?? [],
       graphReasoningIntegrity:
         initialQuestionResult.graphReasoningIntegrity ?? null,
+      noQuestionReason: initialQuestionResult.noQuestionReason ?? null,
     }),
   };
 }