diff --git a/src/components/Toolbar.js b/src/components/Toolbar.js
index 9c7c0be..cb5659a 100644
--- a/src/components/Toolbar.js
+++ b/src/components/Toolbar.js
@@ -83,6 +83,9 @@ const Toolbar = ({ onBackupClick }) => {
         selectedQuarter,
       });
     } catch (err) {
+      // Toast is transient — keep a durable trace so export failures are
+      // diagnosable after the 3s window closes.
+      console.error('Export summary failed:', err);
       toast.error(`Export failed: ${err.message || err}`);
     }
   }, [hasAssessment, currentAssessment, requirements, findings, artifacts, selectedQuarter]);
diff --git a/src/utils/executiveSummaryPDF.js b/src/utils/executiveSummaryPDF.js
index 117e7c5..10b5bd1 100644
--- a/src/utils/executiveSummaryPDF.js
+++ b/src/utils/executiveSummaryPDF.js
@@ -1,7 +1,11 @@
 import jsPDF from 'jspdf';
-import 'jspdf-autotable';
+import { applyPlugin } from 'jspdf-autotable';
 import { getScoringScale, CMMI_LEVELS } from './scoringScale';
 
+// jspdf-autotable v5 no longer patches jsPDF on import; without this the
+// doc.autoTable calls below throw and the export dies with only a toast.
+applyPlugin(jsPDF);
+
 // CSF function order for consistent display
 const FUNCTION_ORDER = [
   'GOVERN (GV)',
diff --git a/src/utils/executiveSummaryPDF.test.js b/src/utils/executiveSummaryPDF.test.js
new file mode 100644
index 0000000..115a18a
--- /dev/null
+++ b/src/utils/executiveSummaryPDF.test.js
@@ -0,0 +1,36 @@
+import jsPDF from 'jspdf';
+import { generateExecutiveSummary } from './executiveSummaryPDF';
+
+// Regression guard for the jspdf-autotable v5 upgrade: v5 stopped patching
+// jsPDF on import, which left doc.autoTable undefined and killed the
+// Export summary button with only a transient toast.
+describe('generateExecutiveSummary', () => {
+  it('applies the autoTable plugin to jsPDF', () => {
+    expect(typeof jsPDF.API.autoTable).toBe('function');
+  });
+
+  it('generates and saves the PDF without throwing for a fresh assessment', () => {
+    // save lives in the jsPDF constructor closure, not on jsPDF.API, so
+    // spyOn can't find it — but an API-level assignment wins at construction.
+    const saveSpy = jest.fn().mockReturnThis();
+    jsPDF.API.save = saveSpy;
+
+    generateExecutiveSummary({
+      assessment: {
+        id: 'a-new',
+        name: 'New Assessment',
+        year: 2026,
+        createdDate: '2026-07-31',
+        scopeIds: ['GV.OC-01', 'ID.AM-01'],
+        observations: {},
+      },
+      requirements: [],
+      findings: [],
+      artifacts: [],
+      selectedQuarter: 2,
+    });
+
+    expect(saveSpy).toHaveBeenCalledWith('CSF-Executive-Summary.pdf');
+    delete jsPDF.API.save;
+  });
+});