diff --git a/.gitea/workflows/e2e-health.yaml b/.gitea/workflows/e2e-health.yaml
index fdbacac8..e739cccb 100644
--- a/.gitea/workflows/e2e-health.yaml
+++ b/.gitea/workflows/e2e-health.yaml
@@ -3,6 +3,7 @@
 # =============================================================================
 # 替代 GitHub Actions 的本地 CI/CD
 # 2026-03-29 Claude Code (ADR-039)
+# 2026-03-31 Claude Code (Phase 21.1 - 每日排程 + 失敗通知)
 
 name: E2E Health Check
 
@@ -10,6 +11,8 @@ on:
   push:
     branches: [main]
   workflow_dispatch:
+  schedule:
+    - cron: '0 16 * * *'  # 每日 00:00 台北 (UTC+8)
 
 jobs:
   e2e-health:
@@ -18,6 +21,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Check API Health
+        id: health_check
         run: |
           sudo apt-get update && sudo apt-get install -y curl || (apt-get update && apt-get install -y curl)
           # 使用 host.docker.internal 或直接 IP
@@ -30,11 +34,21 @@ jobs:
 
             if [ "$HTTP_CODE" = "200" ]; then
               echo "✅ API 可用"
+              echo "status=success" >> $GITHUB_OUTPUT
               exit 0
             fi
             sleep 2
           done
 
           echo "❌ API 無法連線"
+          echo "status=failed" >> $GITHUB_OUTPUT
           exit 1
 
+      - name: Notify Telegram on Failure
+        if: failure()
+        run: |
+          curl -s -X POST "https://api.telegram.org/bot${{ secrets.OPENCLAW_TG_BOT_TOKEN }}/sendMessage" \
+            -d chat_id="${{ secrets.OPENCLAW_TG_CHAT_ID }}" \
+            -d parse_mode="HTML" \
+            -d text="🔴 <b>[E2E Health Check]</b> 失敗%0A%0A📅 $(TZ=Asia/Taipei date '+%Y-%m-%d %H:%M')%0A🔗 API 健康檢查未通過%0A%0A請檢查 K3s 叢集狀態"
+
diff --git a/docs/LOGBOOK.md b/docs/LOGBOOK.md
index 433e1ebc..8859c492 100644
--- a/docs/LOGBOOK.md
+++ b/docs/LOGBOOK.md
@@ -5,11 +5,13 @@
 
 ---
 
-## 📍 當前狀態 (2026-03-31 02:00 台北)
+## 📍 當前狀態 (2026-03-31 02:15 台北)
 
 | 項目 | 狀態 |
 |------|------|
-| **Phase 21 定期報告** | 📋 **規劃完成，待統帥批准** |
+| **Phase 21.1 Daily E2E** | ✅ **已完成** (每日 00:00 台北自動執行) |
+| **Phase 21.2 K3s Report** | 📋 **待實施** (2h) |
+| **Phase 21.3 Weekly Report** | 📋 **待實施** (2h) |
 | **#15 SSE + 樂觀更新** | ✅ **完成** (`8c8664c`) |
 | **#16 DOM Bypass** | ✅ **完成** (`0b87018`) |
 | **Phase A/B/C P1** | ✅ **97/100 OUTSTANDING** |