diff --git a/.amazonq/rules/triage-findings.md b/.amazonq/rules/triage-findings.md
new file mode 100644
index 0000000..f6468cd
--- /dev/null
+++ b/.amazonq/rules/triage-findings.md
@@ -0,0 +1,14 @@
+# Triage Findings
+
+When the task is to triage review findings, follow this workflow:
+
+1. Merge all findings into one list.
+2. Remove duplicates.
+3. Sort by severity: `critical` -> `warning` -> `info`.
+4. Renumber from 1 after sorting.
+5. Fix real issues with the smallest safe change.
+6. Add false positives to `.gitea/ai-review/exclusions.json`.
+7. Add or update tests when behavior changes.
+8. Re-check the issue after each fix.
+
+Use the repo-local `triage-findings` skill for the same workflow when running in Codex.
diff --git a/.claude/skills/triage-findings/SKILL.md b/.claude/skills/triage-findings/SKILL.md
new file mode 100644
index 0000000..ac823cf
--- /dev/null
+++ b/.claude/skills/triage-findings/SKILL.md
@@ -0,0 +1,28 @@
+---
+name: triage-findings
+description: Triage findings, fix real issues, and exclude false positives.
+---
+
+# Triage Findings
+
+## Use
+
+直接輸入：`triage-findings 問題原始檔(文字或截圖)`
+
+## Workflow
+
+1. Merge all findings.
+2. Sort by severity:
+   - critical
+   - warning
+   - info
+3. Renumber from 1.
+4. Fix real issues.
+5. Put false positives into `.gitea/ai-review/exclusions.json`.
+6. Add tests when behavior changes.
+
+## Output Rules
+
+- Keep the final list short.
+- Keep numbering contiguous.
+- Preserve file path, location, and fix.
diff --git a/.gemini/skills/triage-findings/SKILL.md b/.gemini/skills/triage-findings/SKILL.md
new file mode 100644
index 0000000..ac823cf
--- /dev/null
+++ b/.gemini/skills/triage-findings/SKILL.md
@@ -0,0 +1,28 @@
+---
+name: triage-findings
+description: Triage findings, fix real issues, and exclude false positives.
+---
+
+# Triage Findings
+
+## Use
+
+直接輸入：`triage-findings 問題原始檔(文字或截圖)`
+
+## Workflow
+
+1. Merge all findings.
+2. Sort by severity:
+   - critical
+   - warning
+   - info
+3. Renumber from 1.
+4. Fix real issues.
+5. Put false positives into `.gitea/ai-review/exclusions.json`.
+6. Add tests when behavior changes.
+
+## Output Rules
+
+- Keep the final list short.
+- Keep numbering contiguous.
+- Preserve file path, location, and fix.
diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
new file mode 100644
index 0000000..3b5f291
--- /dev/null
+++ b/.github/copilot-instructions.md
@@ -0,0 +1,14 @@
+# Triage Findings
+
+Use the triage-finding workflow for review issue lists:
+
+1. Merge findings into one list.
+2. Remove duplicates.
+3. Sort by severity: `critical` -> `warning` -> `info`.
+4. Renumber from 1.
+5. Fix real issues with the smallest safe change.
+6. Put false positives into `.gitea/ai-review/exclusions.json`.
+7. Add or update tests when behavior changes.
+8. Re-check after each fix.
+
+The full reusable skill lives in `.claude/skills/triage-findings/SKILL.md`.
diff --git a/.github/skills/triage-findings/SKILL.md b/.github/skills/triage-findings/SKILL.md
new file mode 100644
index 0000000..e4cfde8
--- /dev/null
+++ b/.github/skills/triage-findings/SKILL.md
@@ -0,0 +1,14 @@
+# Triage Findings
+
+Use the triage-finding workflow for review issue lists:
+
+1. Merge findings into one list.
+2. Remove duplicates.
+3. Sort by severity: `critical` -> `warning` -> `info`.
+4. Renumber from 1.
+5. Fix real issues with the smallest safe change.
+6. Put false positives into `.gitea/ai-review/exclusions.json`.
+7. Add or update tests when behavior changes.
+8. Re-check after each fix.
+
+The reusable skill lives in `.gemini/skills/triage-findings/SKILL.md`.
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..92710d5
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,16 @@
+# Triage Findings
+
+When the task is to triage review findings, follow this workflow:
+
+1. Merge all findings into one list.
+2. Remove duplicates.
+3. Sort by severity: `critical` -> `warning` -> `info`.
+4. Renumber from 1 after sorting.
+5. Fix real issues with the smallest safe change.
+6. Add false positives to `.gitea/ai-review/exclusions.json`.
+7. Add or update tests when behavior changes.
+8. Re-check the issue after each fix.
+
+Use the repo-local `triage-findings` skill for the same workflow when running in Codex.
+
+Trigger it with `/triage-findings`.
diff --git a/GEMINI.md b/GEMINI.md
new file mode 100644
index 0000000..e4cfde8
--- /dev/null
+++ b/GEMINI.md
@@ -0,0 +1,14 @@
+# Triage Findings
+
+Use the triage-finding workflow for review issue lists:
+
+1. Merge findings into one list.
+2. Remove duplicates.
+3. Sort by severity: `critical` -> `warning` -> `info`.
+4. Renumber from 1.
+5. Fix real issues with the smallest safe change.
+6. Put false positives into `.gitea/ai-review/exclusions.json`.
+7. Add or update tests when behavior changes.
+8. Re-check after each fix.
+
+The reusable skill lives in `.gemini/skills/triage-findings/SKILL.md`.
diff --git a/README.md b/README.md
index d47a71e..77eb3ad 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@
 5. 從PR問題表格中取出所有舊問題，依照等級排序後 Comment 到 Push Request
 6. 從PR問題表格中取出所有新問題，排除嚴重等級的問題後 Comment 到 Push Request
 7. 從PR問題表格中取出所有新問題，將每個嚴重等級的問題 Comment 到 Push Request
-8. Commit 問題檔案，將 workspace 中實際存在的同步檔覆蓋到記憶區；workspace 不存在但記憶區已存在的同步檔則移除後再同步，避免 `git add` 因缺檔 pathspec 失敗
+8. Commit 問題檔案，將 workspace 中實際存在的同步檔覆蓋到記憶區；workspace 沒有的同步檔就略過，不會刪除記憶區既有內容
 9. 如果PR問題表格中有嚴重問題，則不要讓 workflow 執行成功(exit 1)
 
 # 設計
@@ -227,4 +227,4 @@ Amazon Q：直接輸入 `triage-findings 問題原始檔(文字或截圖)`
 
 ### 版本包含
 
-提交時一併包含 `triage-findings` skill 與各平台入口檔；已存在檔案一律覆蓋，同步到最新內容；若 workspace 已移除某個同步檔，記憶區中的對應檔案也會一併刪除，讓 commit 結果與 workspace 保持一致。
+提交時一併包含 `triage-findings` skill 與各平台入口檔；已存在檔案一律覆蓋，同步到最新內容；若 workspace 沒有某個同步檔，記憶區會保留原檔，不做刪除。
diff --git a/TODO.md b/TODO.md
index 2de90ba..c15dbc5 100644
--- a/TODO.md
+++ b/TODO.md
@@ -38,9 +38,9 @@
 - 已驗收：log 已明確顯示 `.gitea/ai-review/findings.json` 與 `.gitea/ai-review/exclusions.json` 都是 `JSON 格式正確`。
 
 ## 階段八：記憶區 commit/push 與錯誤處理
-- 目標：記憶區能成功 commit/push，且一併包含 `triage-findings` skill 與各平台入口檔；skill 檔案已存在時一律以來源覆蓋，缺少的同步檔則從記憶區刪除，達到鏡像同步效果；錯誤時有明確 log，流程結束有總結訊息。
-- 驗收：log 有「persisted findings」、「commit=...」、「push=...」等訊息，且能看出 skill 相關檔案已一併提交並被鏡像同步；當 workspace 不再包含某個同步檔時，記憶區中的對應檔案會被刪除且不再出現在 commit；錯誤時有「Runner failed: ...」等明確錯誤說明。
-- 已驗收：log 已出現 `persisted findings commit=79506eb push=整理程式碼`，代表 commit/push 成功；本次已補上缺檔刪除的鏡像同步邏輯，相關單元測試也已覆蓋。
+- 目標：記憶區能成功 commit/push，且一併包含 `triage-findings` skill 與各平台入口檔；skill 檔案已存在時一律以來源覆蓋，workspace 沒有的同步檔則保留記憶區既有內容，不做刪除；錯誤時有明確 log，流程結束有總結訊息。
+- 驗收：log 有「persisted findings」、「commit=...」、「push=...」等訊息，且能看出 skill 相關檔案已一併提交並被來源覆蓋；當 workspace 缺少某個同步檔時，記憶區中的對應檔案不會被刪除；錯誤時有「Runner failed: ...」等明確錯誤說明。
+- 已驗收：log 已出現 `persisted findings commit=79506eb push=整理程式碼`，代表 commit/push 成功；本次已補上「來源覆蓋、缺檔不刪除」的同步規則，相關單元測試也已覆蓋。
 
 ## 階段九：阻擋嚴重問題 PR（第 8 點）
 - 目標：如果 PR 問題表格中有嚴重（critical）問題，workflow 需直接 exit 1，不讓流程成功。
diff --git a/app/git.js b/app/git.js
index b21c3b5..eeac89f 100644
--- a/app/git.js
+++ b/app/git.js
@@ -66,9 +66,9 @@ export async function commitAndPush(workspace, repoDir, _spawnSync = spawnSync)
       run(['config', 'user.name', 'AI Review Bot'], repoDir);
 
       const existingSyncPaths = [];
-      const missingSyncPaths = [];
 
-      // Mirror sync files from workspace into the repo copy.
+      // Copy action skill files into the target repo. Existing files are overwritten;
+      // missing source files are ignored so we do not delete target repo content.
       for (const relPath of SYNC_PATHS) {
         const src = path.join(workspace, relPath);
         const dest = path.join(repoDir, relPath);
@@ -76,21 +76,12 @@ export async function commitAndPush(workspace, repoDir, _spawnSync = spawnSync)
           fs.mkdirSync(path.dirname(dest), { recursive: true });
           fs.copyFileSync(src, dest);
           existingSyncPaths.push(relPath);
-          continue;
         }
-
-        if (fs.existsSync(dest)) {
-          fs.rmSync(dest, { force: true });
-        }
-        missingSyncPaths.push(relPath);
       }
 
       if (existingSyncPaths.length > 0) {
         run(['add', ...existingSyncPaths], repoDir);
       }
-      if (missingSyncPaths.length > 0) {
-        run(['rm', '--cached', '--ignore-unmatch', '--', ...missingSyncPaths], repoDir);
-      }
 
       const status = run(['status', '--porcelain'], repoDir);
       if (!status) {
diff --git a/app/git.test.js b/app/git.test.js
index 9807d01..59ecb02 100644
--- a/app/git.test.js
+++ b/app/git.test.js
@@ -101,18 +101,18 @@ describe('commitAndPush', () => {
     assert.ok(!addCall.args.includes('README.md'));
   });
 
-  it('removes missing sync paths from the repo copy', async () => {
+  it('keeps repo copies when the source sync file is missing', async () => {
     const missingPath = path.join(workspace, '.amazonq/rules/triage-findings.md');
     fs.rmSync(missingPath, { force: true });
-    fs.rmSync(path.join(workspace, 'repo', '.amazonq/rules/triage-findings.md'), { force: true });
+    const repoPath = path.join(workspace, 'repo', '.amazonq/rules/triage-findings.md');
+    fs.writeFileSync(repoPath, 'stale');
     const spawn = makeSpawn();
 
     await commitAndPush(workspace, path.join(workspace, 'repo'), spawn);
 
     const rmCall = spawn.calls.find(c => c.args[0] === 'rm');
-    assert.ok(rmCall, 'expected git rm to run');
-    assert.ok(rmCall.args.includes('.amazonq/rules/triage-findings.md'));
-    assert.equal(fs.existsSync(path.join(workspace, 'repo', '.amazonq/rules/triage-findings.md')), false);
+    assert.equal(rmCall, undefined, 'git rm should not run for missing source files');
+    assert.equal(fs.readFileSync(repoPath, 'utf8'), 'stale');
   });
 
   it('overwrites existing repo copies with workspace files', async () => {