diff --git a/app/roles.test.js b/app/roles.test.js
index 54d5c79..b700a38 100644
--- a/app/roles.test.js
+++ b/app/roles.test.js
@@ -72,6 +72,11 @@ describe('buildAnalysisPrompt', () => {
     assert.match(prompt, /審查重點：邊界與空值/);
     assert.match(prompt, /只回傳 JSON 陣列/);
   });
+
+  it('falls back to a default when focus is missing instead of showing undefined', () => {
+    const prompt = buildAnalysisPrompt({ name: 'NoFocus', body: 'x' });
+    assert.doesNotMatch(prompt, /undefined/);
+  });
 });
 
 describe('getRoleIntro', () => {
@@ -80,4 +85,10 @@ describe('getRoleIntro', () => {
     assert.match(intro, /🔮 Tester/);
     assert.match(intro, /logic/);
   });
+
+  it('renders empty cells instead of undefined when focus/personality are missing', () => {
+    const intro = getRoleIntro([{ name: 'Bare' }]);
+    assert.match(intro, /Bare/);
+    assert.doesNotMatch(intro, /undefined/);
+  });
 });