diff --git a/data/cos-join-registry.json b/data/cos-join-registry.json
index bd9cc3a2..0d954c2c 100644
--- a/data/cos-join-registry.json
+++ b/data/cos-join-registry.json
@@ -3,7 +3,7 @@
     "version": "1.0",
     "description": "COS桶自动接入注册表 · 团队成员COS配置",
     "created": "2026-04-07T10:00:00Z",
-    "updated": "2026-04-19T14:40:33.425Z",
+    "updated": "2026-04-20T04:54:24.934Z",
     "sovereign": "冰朔 · TCS-0002∞",
     "guardian": "铸渊 · ICE-GL-ZY001",
     "note": "肥猫已配置COS桶 · 其他成员逐步配置 · Agent自动检测接入"
@@ -17,7 +17,7 @@
       "region": "ap-singapore",
       "registered_at": "2026-04-07T10:00:00Z",
       "connection_status": "no_credentials",
-      "last_check": "2026-04-19T14:40:33.424Z",
+      "last_check": "2026-04-20T04:54:24.933Z",
       "first_connected": null,
       "last_message": "未配置COS密钥"
     },
@@ -29,7 +29,7 @@
       "region": "ap-singapore",
       "registered_at": "2026-04-07T10:00:00Z",
       "connection_status": "no_credentials",
-      "last_check": "2026-04-19T14:40:33.424Z",
+      "last_check": "2026-04-20T04:54:24.933Z",
       "first_connected": null,
       "last_message": "未配置COS密钥"
     },
@@ -41,7 +41,7 @@
       "region": "ap-singapore",
       "registered_at": "2026-04-07T10:00:00Z",
       "connection_status": "no_credentials",
-      "last_check": "2026-04-19T14:40:33.424Z",
+      "last_check": "2026-04-20T04:54:24.933Z",
       "first_connected": null,
       "last_message": "未配置COS密钥"
     },
@@ -53,7 +53,7 @@
       "region": "ap-singapore",
       "registered_at": "2026-04-07T10:00:00Z",
       "connection_status": "no_credentials",
-      "last_check": "2026-04-19T14:40:33.424Z",
+      "last_check": "2026-04-20T04:54:24.933Z",
       "first_connected": null,
       "last_message": "未配置COS密钥"
     },
@@ -65,7 +65,7 @@
       "region": "ap-singapore",
       "registered_at": "2026-04-07T10:00:00Z",
       "connection_status": "no_credentials",
-      "last_check": "2026-04-19T14:40:33.424Z",
+      "last_check": "2026-04-20T04:54:24.933Z",
       "first_connected": null,
       "last_message": "未配置COS密钥"
     },
@@ -77,7 +77,7 @@
       "region": "ap-singapore",
       "registered_at": "2026-04-07T10:00:00Z",
       "connection_status": "no_credentials",
-      "last_check": "2026-04-19T14:40:33.424Z",
+      "last_check": "2026-04-20T04:54:24.933Z",
       "first_connected": null,
       "last_message": "未配置COS密钥"
     },
@@ -89,7 +89,7 @@
       "region": "ap-singapore",
       "registered_at": "2026-04-07T10:00:00Z",
       "connection_status": "no_credentials",
-      "last_check": "2026-04-19T14:40:33.425Z",
+      "last_check": "2026-04-20T04:54:24.933Z",
       "first_connected": null,
       "last_message": "未配置COS密钥"
     },
@@ -101,7 +101,7 @@
       "region": "ap-singapore",
       "registered_at": "2026-04-07T10:00:00Z",
       "connection_status": "no_credentials",
-      "last_check": "2026-04-19T14:40:33.425Z",
+      "last_check": "2026-04-20T04:54:24.934Z",
       "first_connected": null,
       "last_message": "未配置COS密钥"
     },
@@ -113,7 +113,7 @@
       "region": "ap-singapore",
       "registered_at": "2026-04-07T10:00:00Z",
       "connection_status": "no_credentials",
-      "last_check": "2026-04-19T14:40:33.425Z",
+      "last_check": "2026-04-20T04:54:24.934Z",
       "first_connected": null,
       "last_message": "未配置COS密钥"
     }
diff --git a/signal-log/cos-join-2026-04-20.json b/signal-log/cos-join-2026-04-20.json
new file mode 100644
index 00000000..62e1cc31
--- /dev/null
+++ b/signal-log/cos-join-2026-04-20.json
@@ -0,0 +1,56 @@
+[
+  {
+    "timestamp": "2026-04-20T04:54:24.934Z",
+    "action": "check",
+    "total": 9,
+    "connected": 0,
+    "pending": 9,
+    "results": [
+      {
+        "persona_id": "shushu",
+        "status": "no_credentials",
+        "message": "未配置COS密钥"
+      },
+      {
+        "persona_id": "qiuqiu",
+        "status": "no_credentials",
+        "message": "未配置COS密钥"
+      },
+      {
+        "persona_id": "ounomiya",
+        "status": "no_credentials",
+        "message": "未配置COS密钥"
+      },
+      {
+        "persona_id": "jiyao",
+        "status": "no_credentials",
+        "message": "未配置COS密钥"
+      },
+      {
+        "persona_id": "xiaotanheshu",
+        "status": "no_credentials",
+        "message": "未配置COS密钥"
+      },
+      {
+        "persona_id": "chenxing",
+        "status": "no_credentials",
+        "message": "未配置COS密钥"
+      },
+      {
+        "persona_id": "tangxingyun",
+        "status": "no_credentials",
+        "message": "未配置COS密钥"
+      },
+      {
+        "persona_id": "yaochu",
+        "status": "no_credentials",
+        "message": "未配置COS密钥"
+      },
+      {
+        "persona_id": "zhiqiu",
+        "status": "no_credentials",
+        "message": "未配置COS密钥"
+      }
+    ]
+  }
+]
\ No newline at end of file