diff --git a/app/findings.js b/app/findings.js
index 5d7d03d..392f581 100644
--- a/app/findings.js
+++ b/app/findings.js
@@ -272,7 +272,7 @@ export async function deduplicateWithAI(findings) {
 /**
  * 讀取排除問題檔案（從來源分支的 cloned repoDir 中的 EXCLUSIONS_PATH）
  */
-export function loadExclusions(workspace, repoState = null) {
+export function loadExclusions(workspace, repoState = null, mirrorWorkspace = null) {
   const fullPath = path.join(workspace, EXCLUSIONS_PATH);
   if (!fs.existsSync(fullPath)) {
     warn(`排除問題檔案不存在，視為空: ${fullPath}`);
@@ -302,6 +302,11 @@ export function loadExclusions(workspace, repoState = null) {
     line(`檔案資訊: bytes=${stat.size} mtime=${formatFileTime(stat.mtimeMs)} raw=${rawCount} normalized=${exclusions.length} path=${path.relative(workspace, fullPath) || fullPath}`);
     if (sourceFormat !== 'array') {
       writeCanonicalExclusions(fullPath, normalizedSource);
+      if (mirrorWorkspace && path.resolve(mirrorWorkspace) !== path.resolve(workspace)) {
+        const mirrorPath = path.join(mirrorWorkspace, EXCLUSIONS_PATH);
+        fs.mkdirSync(path.dirname(mirrorPath), { recursive: true });
+        writeCanonicalExclusions(mirrorPath, normalizedSource);
+      }
       line(`排除問題格式已修正為頂層陣列: source=${sourceFormat} -> array`);
     }
   } catch (e) {
diff --git a/app/findings.test.js b/app/findings.test.js
index fc945fd..c1e2284 100644
--- a/app/findings.test.js
+++ b/app/findings.test.js
@@ -60,6 +60,28 @@ describe('findings exclusions', () => {
     assert.ok(logs.some(line => line.includes('排除問題格式已修正為頂層陣列: source=exclusions -> array')));
   });
 
+  it('mirrors repaired exclusions into the workspace root when requested', () => {
+    const repoRoot = path.join(workspace, 'repo');
+    const mirrorRoot = path.join(workspace, 'workspace');
+    const repoFullPath = path.join(repoRoot, EXCLUSIONS_PATH);
+    const mirrorFullPath = path.join(mirrorRoot, EXCLUSIONS_PATH);
+    fs.mkdirSync(path.dirname(repoFullPath), { recursive: true });
+    fs.mkdirSync(path.dirname(mirrorFullPath), { recursive: true });
+    fs.writeFileSync(repoFullPath, JSON.stringify({
+      exclusions: [
+        { location: 'README.md:12', suggestion: 'keep' },
+      ],
+    }, null, 2));
+
+    const exclusions = loadExclusions(repoRoot, null, mirrorRoot);
+    const mirror = JSON.parse(fs.readFileSync(mirrorFullPath, 'utf8'));
+
+    assert.equal(exclusions.length, 1);
+    assert.ok(Array.isArray(mirror));
+    assert.equal(mirror[0].location, 'README.md:12');
+    assert.equal(mirror[0].suggestion, 'keep');
+  });
+
   it('applies exclusions loaded from wrapper format', () => {
     const findings = [
       { location: 'entrypoint.sh:180', role: 'Maya', suggestion: 'keep' },
diff --git a/app/main.js b/app/main.js
index 03cd644..3ebe32e 100644
--- a/app/main.js
+++ b/app/main.js
@@ -95,7 +95,7 @@ async function main() {
   ok(`Step3 去重完成: ${mergedFindings.length} -> ${sorted.length} 筆 (critical=${sorted.filter(f=>f.level==='critical').length} warning=${sorted.filter(f=>f.level==='warning').length} info=${sorted.filter(f=>f.level==='info').length})`);
 
   step('Step4', 'AI 排除問題過濾');
-  const exclusions = loadExclusions(repoDir || WORKSPACE, repoState);
+  const exclusions = loadExclusions(repoDir || WORKSPACE, repoState, WORKSPACE);
   const ruleFiltered = applyExclusions(sorted, exclusions);
   const filtered = await filterFalsePositivesWithAI(ruleFiltered, exclusions);
   ok(`Step4 完成: findings total=${filtered.length}`);