diff --git a/docs/hub-protocol.md b/docs/hub-protocol.md
index c47b9bf..a3ef0e5 100644
--- a/docs/hub-protocol.md
+++ b/docs/hub-protocol.md
@@ -96,7 +96,8 @@ X-Hub-Signature: <hex HMAC-SHA256(installSecret, timestamp + "." + rawBody)>
     "checkIns": { "last30d": 96 },
     "messages": { "email30d": 610, "whatsapp30d": 233 },
     "paymentProviders": ["yoco", "payfast"],
-    "campuses": false,
+    "campuses": false,                                 // Site settings → Campuses on/off
+    "campusCount": 0,                                  // active campuses (0 while off; Cross Events 1.43.0+)
     "income": { "last30d": "R5 001–R20 000", "allTime": "over R100 000" }
   }
 }