diff --git a/module.json b/module.json
index cd3692f..c189a12 100644
--- a/module.json
+++ b/module.json
@@ -82,6 +82,18 @@
       "why": "the eef client site over http; reached by the proxy here under the eef route"
     }
   ],
+  "data": {
+    "kept-by": {
+      "s3-bucket": {
+        "class": "irreplaceable",
+        "why": "the photos themselves, uploaded by the people the sites serve: the operator's ranking (2026-10-06) — whatever their own backups, the mesh protects what it holds"
+      },
+      "mongodb-database": {
+        "class": "irreplaceable",
+        "why": "the albums, captions and order the photos are shown in"
+      }
+    }
+  },
   "resources": [
     {
       "id": "state",