diff --git a/backend/src/app/binfile/v3.clj b/backend/src/app/binfile/v3.clj
index 70a9960e69..f90ff08621 100644
--- a/backend/src/app/binfile/v3.clj
+++ b/backend/src/app/binfile/v3.clj
@@ -54,7 +54,7 @@
   [:map {:title "Manifest"}
    [:version ::sm/int]
    [:type :string]
-
+   [:referer {:optional true} :string]
    [:generated-by {:optional true} :string]
 
    [:files
diff --git a/library/src/lib/builder.cljs b/library/src/lib/builder.cljs
index f77f6f8ae5..c7b87d32c3 100644
--- a/library/src/lib/builder.cljs
+++ b/library/src/lib/builder.cljs
@@ -271,11 +271,19 @@
     (fn []
       (json/->js @state))))
 
+(def ^:private schema:context-options
+  [:map {:title "ContextOptions"}
+   [:referer {:optional true} ::sm/text]])
+
+(def ^:private decode-context-options
+  (sm/decoder schema:context-options sm/json-transformer))
+
 (defn create-build-context
   "Create an empty builder state context."
-  []
-  (let [state (atom {})
-        api   (create-builder-api state)]
+  [options]
+  (let [options (some-> options decode-params decode-context-options)
+        state   (atom {:options options})
+        api     (create-builder-api state)]
 
     (specify! api
       cljs.core/IDeref
diff --git a/library/src/lib/export.cljs b/library/src/lib/export.cljs
index 7fee373440..1d5d5cfcb6 100644
--- a/library/src/lib/export.cljs
+++ b/library/src/lib/export.cljs
@@ -183,17 +183,22 @@
 
 (defn- generate-manifest-procs
   [state]
-  (let [files (->> (get state ::fb/files)
-                   (mapv (fn [[file-id file]]
-                           {:id file-id
-                            :name (:name file)
-                            :features (:features file)})))
+  (let [opts   (get state :options)
+        files  (->> (get state ::fb/files)
+                    (mapv (fn [[file-id file]]
+                            {:id file-id
+                             :name (:name file)
+                             :features (:features file)})))
         params {:type "penpot/export-files"
                 :version 1
                 :generated-by "penpot-library/%version%"
+                :referer (get opts :referer)
                 :files files
-                :relations []}]
-    ["manifest.json" (delay (json/encode params))]))
+                :relations []}
+        params (d/without-nils params)]
+
+    ["manifest.json"
+     (delay (json/encode params))]))
 
 (defn- generate-procs
   [state]