diff --git a/app/comments.test.js b/app/comments.test.js
index e1c0792..08991bc 100644
--- a/app/comments.test.js
+++ b/app/comments.test.js
@@ -307,6 +307,20 @@ describe('postFindingsReview', () => {
     assert.equal(reviewCalls[0].body, reviewCalls[0].body.trimEnd());
   });
 
+  it('appends usageSection verbatim after the stats block without altering structure', async () => {
+    const reviewCalls = [];
+    const usageSection = '## 🤖 AI 助理使用量\n\n| x | y |\n| - | - |\n| 1 | 2 |';
+    await postFindingsReview([
+      { level: 'warning', role: 'Leo', location: 'app/b.js:20', suggestion: 'W', is_new: true },
+    ], { postReview: async (args) => { reviewCalls.push(args); }, usageSection });
+
+    const body = reviewCalls[0].body;
+    // 統計區塊在前、usageSection 原樣接在後（中間一個空行）；不交錯、不被竄改
+    assert.ok(body.startsWith('## AI Code Review 統計'));
+    assert.ok(body.endsWith(usageSection));
+    assert.match(body, /## AI Code Review 統計[\s\S]*\n\n## 🤖 AI 助理使用量/);
+  });
+
   it('counts both new and old findings in the summary but only inline-comments new ones', async () => {
     const reviewCalls = [];
     await postFindingsReview([
diff --git a/app/findings.test.js b/app/findings.test.js
index a15ae03..8897733 100644
--- a/app/findings.test.js
+++ b/app/findings.test.js
@@ -244,6 +244,23 @@ describe('findings exclusions', () => {
     assert.equal(result.length, 1); // 只有明確 false_positive 才剔除，其餘保守保留
   });
 
+  it('keeps failed and confirmed, drops only confirmed false positives (mixed parallel)', async () => {
+    const findings = [
+      { level: 'warning', role: 'A', location: 'a.js:1', problem: 'p', suggestion: 'fail' },
+      { level: 'warning', role: 'B', location: 'b.js:2', problem: 'p', suggestion: 'fp' },
+      { level: 'warning', role: 'C', location: 'c.js:3', problem: 'p', suggestion: 'ok' },
+    ];
+    const chatFn = async (_sys, user) => {
+      const loc = JSON.parse(user).location;
+      if (loc === 'a.js:1') throw new Error('boom');             // 失敗 → 保守保留
+      if (loc === 'b.js:2') return { verdict: 'false_positive' };// 誤報 → 剔除
+      return { verdict: 'confirmed' };                            // 成立 → 保留
+    };
+
+    const result = await filterFalsePositivesWithAI(findings, [], chatFn);
+    assert.deepEqual(result.map(f => f.location).sort(), ['a.js:1', 'c.js:3']);
+  });
+
   it('resolveMissingLineNumbers fills missing line numbers by re-asking the role', async () => {
     const findings = [
       { level: 'critical', role: 'Maya', location: 'app/a.js', problem: 'p', suggestion: 's' },
@@ -281,6 +298,17 @@ describe('findings exclusions', () => {
     assert.equal(n, 3);                              // 嘗試 3 次後放棄
   });
 
+  it('resolveMissingLineNumbers swallows chatFn exceptions and keeps the filename', async () => {
+    const findings = [{ level: 'warning', role: 'Leo', location: 'app/z.js', problem: 'p', suggestion: 's' }];
+    let n = 0;
+    const chatFn = async () => { n += 1; throw new Error('LLM down'); };
+
+    await resolveMissingLineNumbers(findings, 'd', { chatFn, getRole: () => null, maxAttempts: 2 });
+
+    assert.equal(findings[0].location, 'app/z.js'); // 例外被吞、保留檔名、不中斷流程
+    assert.equal(n, 2);                              // 每次嘗試仍呼叫、受上限約束
+  });
+
   it('logs exclusions file metadata and repo state when loading exclusions', () => {
     const fullPath = path.join(workspace, EXCLUSIONS_PATH);
     fs.mkdirSync(path.dirname(fullPath), { recursive: true });