diff --git a/.github/workflows/cd.yaml b/.github/workflows/cd.yaml
index dd81dae4..0b6252f4 100644
--- a/.github/workflows/cd.yaml
+++ b/.github/workflows/cd.yaml
@@ -124,11 +124,31 @@ jobs:
             -d chat_id="${{ secrets.OPENCLAW_TG_CHAT_ID }}" \
             -d text="❌ AWOOOI Pre-flight 失敗%0A%0A🔗 ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}" || true
 
+  # ==================== Wave C.2: 監控覆蓋率檢查 (ADR-037) ====================
+  # 2026-03-29 Claude Code: 確保監控覆蓋率 >= 90%
+  monitoring-coverage:
+    name: "Monitoring Coverage"
+    runs-on: [self-hosted, harbor, k8s]
+    needs: pre-flight-check
+    timeout-minutes: 2
+    steps:
+      - uses: actions/checkout@v4
+      - name: "Check Monitoring Coverage"
+        run: |
+          python3 ops/monitoring/generate_monitoring.py --validate-only --ci
+          echo "✅ 監控覆蓋率檢查通過 (>= 90%)"
+      - name: "Notify Coverage Failure"
+        if: failure()
+        run: |
+          curl -sf -X POST "https://api.telegram.org/bot${{ secrets.OPENCLAW_TG_BOT_TOKEN }}/sendMessage" \
+            -d chat_id="${{ secrets.OPENCLAW_TG_CHAT_ID }}" \
+            -d text="⚠️ 監控覆蓋率低於 90%%，請更新 service-registry.yaml%0A%0A🔗 ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}" || true
+
   # ==================== 路徑偵測 (使用 dorny/paths-filter) ====================
   detect-changes:
     name: Detect Changes
     runs-on: [self-hosted, harbor, k8s]
-    needs: pre-flight-check
+    needs: [pre-flight-check, monitoring-coverage]
     timeout-minutes: 1
     outputs:
       api: ${{ inputs.force_deploy == true && 'true' || steps.filter.outputs.api }}
@@ -426,10 +446,22 @@ jobs:
           # 3. SignOz Webhook Health
           try:
               r = httpx.get(f'{BASE}/api/v1/webhooks/signoz/health', timeout=TIMEOUT)
-              results.append(('signoz', r.status_code == 200))
+              results.append(('signoz_health', r.status_code == 200))
           except Exception as e:
-              results.append(('signoz', False))
-              print(f'SignOz: {e}')
+              results.append(('signoz_health', False))
+              print(f'SignOz Health: {e}')
+
+          # 4. SignOz Webhook POST (P0-1 修復 2026-03-29)
+          try:
+              r = httpx.post(f'{BASE}/api/v1/webhooks/signoz/alert', json={
+                  'alertname': 'E2E_CD_TEST', 'status': 'firing',
+                  'labels': {'severity': 'info', 'service_name': 'cd-test'},
+                  'annotations': {'summary': 'CD Pipeline E2E Test'}
+              }, timeout=TIMEOUT)
+              results.append(('signoz_post', r.status_code == 200))
+          except Exception as e:
+              results.append(('signoz_post', False))
+              print(f'SignOz POST: {e}')
 
           # Summary
           passed = sum(1 for _, ok in results if ok)
diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 8ef88d14..09dffcd0 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -31,6 +31,13 @@ jobs:
     runs-on: [self-hosted, harbor, k8s]
     timeout-minutes: 1
     steps:
+      # 2026-03-29 Claude Code: 修復 _diag/pages 檔案衝突
+      - name: "Clean Runner Diagnostics"
+        run: |
+          RUNNER_ROOT=$(dirname "$(dirname "$RUNNER_TEMP")")
+          rm -rf "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          mkdir -p "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+
       - name: Quick sanity check
         run: |
           echo "✅ Runner 可用"
@@ -44,6 +51,13 @@ jobs:
     needs: pre-flight
     timeout-minutes: 10
     steps:
+      # 2026-03-29 Claude Code: 修復 _diag/pages 檔案衝突
+      - name: "Clean Runner Diagnostics"
+        run: |
+          RUNNER_ROOT=$(dirname "$(dirname "$RUNNER_TEMP")")
+          rm -rf "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          mkdir -p "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+
       - uses: actions/checkout@v4
         with:
           clean: true
@@ -124,6 +138,11 @@ jobs:
     needs: lint
     timeout-minutes: 15
     steps:
+      - name: "Clean Runner Diagnostics"
+        run: |
+          RUNNER_ROOT=$(dirname "$(dirname "$RUNNER_TEMP")")
+          rm -rf "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          mkdir -p "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
       - uses: actions/checkout@v4
 
       - name: Setup pnpm
@@ -157,6 +176,11 @@ jobs:
     needs: lint
     timeout-minutes: 15
     steps:
+      - name: "Clean Runner Diagnostics"
+        run: |
+          RUNNER_ROOT=$(dirname "$(dirname "$RUNNER_TEMP")")
+          rm -rf "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          mkdir -p "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
       - uses: actions/checkout@v4
 
       - name: Setup pnpm
@@ -199,6 +223,11 @@ jobs:
     needs: pre-flight
     timeout-minutes: 5
     steps:
+      - name: "Clean Runner Diagnostics"
+        run: |
+          RUNNER_ROOT=$(dirname "$(dirname "$RUNNER_TEMP")")
+          rm -rf "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          mkdir -p "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
       - uses: actions/checkout@v4
 
       - name: Setup Python
@@ -227,6 +256,11 @@ jobs:
     needs: api-lint
     timeout-minutes: 10
     steps:
+      - name: "Clean Runner Diagnostics"
+        run: |
+          RUNNER_ROOT=$(dirname "$(dirname "$RUNNER_TEMP")")
+          rm -rf "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          mkdir -p "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
       - uses: actions/checkout@v4
 
       - name: Setup Python
@@ -255,6 +289,11 @@ jobs:
     timeout-minutes: 5
     continue-on-error: true  # 不阻塞主 Pipeline
     steps:
+      - name: "Clean Runner Diagnostics"
+        run: |
+          RUNNER_ROOT=$(dirname "$(dirname "$RUNNER_TEMP")")
+          rm -rf "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          mkdir -p "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
       - uses: actions/checkout@v4
 
       - name: Test Ollama Connectivity
@@ -320,6 +359,11 @@ jobs:
     needs: pre-flight
     timeout-minutes: 3
     steps:
+      - name: "Clean Runner Diagnostics"
+        run: |
+          RUNNER_ROOT=$(dirname "$(dirname "$RUNNER_TEMP")")
+          rm -rf "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          mkdir -p "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
       - uses: actions/checkout@v4
 
       - name: Setup Node.js
@@ -346,6 +390,11 @@ jobs:
       matrix:
         app: [web, api]
     steps:
+      - name: "Clean Runner Diagnostics"
+        run: |
+          RUNNER_ROOT=$(dirname "$(dirname "$RUNNER_TEMP")")
+          rm -rf "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          mkdir -p "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
       - uses: actions/checkout@v4
 
       - name: Set up Docker Buildx
diff --git a/.github/workflows/daily-e2e-health.yaml b/.github/workflows/daily-e2e-health.yaml
index ed2e4c40..e45fee1c 100644
--- a/.github/workflows/daily-e2e-health.yaml
+++ b/.github/workflows/daily-e2e-health.yaml
@@ -48,6 +48,13 @@ jobs:
     runs-on: [self-hosted, harbor, k8s]
     timeout-minutes: 15
     steps:
+      # 2026-03-29 Claude Code: 修復 _diag/pages 檔案衝突
+      - name: "Clean Runner Diagnostics"
+        run: |
+          RUNNER_ROOT=$(dirname "$(dirname "$RUNNER_TEMP")")
+          rm -rf "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          mkdir -p "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+
       - uses: actions/checkout@v4
 
       - name: Setup Python
diff --git a/.github/workflows/nightly-llm.yaml b/.github/workflows/nightly-llm.yaml
index 8e4492d4..f29bff0c 100644
--- a/.github/workflows/nightly-llm.yaml
+++ b/.github/workflows/nightly-llm.yaml
@@ -38,6 +38,13 @@ jobs:
     runs-on: [self-hosted, harbor, k8s]
     timeout-minutes: 60  # 1 小時超時
     steps:
+      # 2026-03-29 Claude Code: 修復 _diag/pages 檔案衝突
+      - name: "Clean Runner Diagnostics"
+        run: |
+          RUNNER_ROOT=$(dirname "$(dirname "$RUNNER_TEMP")")
+          rm -rf "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          mkdir -p "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+
       - uses: actions/checkout@v4
 
       - name: Setup Python
diff --git a/.github/workflows/runner-healthcheck.yml b/.github/workflows/runner-healthcheck.yml
index 71929907..7c60529e 100644
--- a/.github/workflows/runner-healthcheck.yml
+++ b/.github/workflows/runner-healthcheck.yml
@@ -36,6 +36,17 @@ jobs:
     timeout-minutes: 5
 
     steps:
+      # =================================================================
+      # 2026-03-29 Claude Code: 修復 _diag/pages 檔案衝突
+      # 根本原因: GitHub Actions Runner 診斷檔案沒有自動清理
+      # =================================================================
+      - name: "Clean Runner Diagnostics"
+        run: |
+          RUNNER_ROOT=$(dirname "$(dirname "$RUNNER_TEMP")")
+          rm -rf "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          mkdir -p "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          echo "✅ Cleaned _diag/pages"
+
       - name: "Check Docker Service"
         id: docker
         run: |
@@ -83,7 +94,7 @@ jobs:
         id: k8s
         run: |
           if timeout 10 ssh -o StrictHostKeyChecking=no -o ConnectTimeout=5 \
-            wooo@192.168.0.120 "kubectl get nodes" 2>/dev/null; then
+            wooo@192.168.0.125 "kubectl get nodes" 2>/dev/null; then
             echo "k8s_status=healthy" >> $GITHUB_OUTPUT
           else
             echo "k8s_status=unhealthy" >> $GITHUB_OUTPUT
@@ -131,6 +142,12 @@ jobs:
     runs-on: [self-hosted, harbor, k8s]
 
     steps:
+      - name: "Clean Runner Diagnostics"
+        run: |
+          RUNNER_ROOT=$(dirname "$(dirname "$RUNNER_TEMP")")
+          rm -rf "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+          mkdir -p "$RUNNER_ROOT/_diag/pages" 2>/dev/null || true
+
       - name: "Attempt Docker Cleanup"
         run: |
           echo "=== 嘗試清理 Docker ==="