diff --git a/mod/assign/yui/build/moodle-mod_assign-history/moodle-mod_assign-history-debug.js b/mod/assign/yui/build/moodle-mod_assign-history/moodle-mod_assign-history-debug.js
new file mode 100644
index 00000000000..73c93578fcd
--- /dev/null
+++ b/mod/assign/yui/build/moodle-mod_assign-history/moodle-mod_assign-history-debug.js
@@ -0,0 +1,73 @@
+YUI.add('moodle-mod_assign-history', function (Y, NAME) {
+
+// Define a function that will run in the context of a
+// Node instance:
+var CSS = {
+        LINK: 'mod-assign-history-link',
+        OPEN: 'mod-assign-history-link-open',
+        CLOSED: 'mod-assign-history-link-closed',
+        PANEL: 'mod-assign-history-panel'
+    },
+    COUNT = 0,
+    TOGGLE = function() {
+        var id = this.get('for'),
+            panel = Y.one('#' + id);
+        if (this.hasClass(CSS.OPEN)) {
+            this.removeClass(CSS.OPEN);
+            this.addClass(CSS.CLOSED);
+            this.setStyle('overflow', 'hidden');
+            panel.hide();
+        } else {
+            this.removeClass(CSS.CLOSED);
+            this.addClass(CSS.OPEN);
+            panel.show();
+        }
+    },
+    HISTORY = function() {
+        var link = null,
+            panel = null,
+            wrapper = null,
+            container = this;
+
+        // Loop through all the children of this container and turn
+        // every odd node to a link to open/close the following panel.
+        this.get('children').each(function () {
+            if (link) {
+                COUNT++;
+                // First convert the link to an anchor.
+                wrapper = Y.Node.create('<a/>');
+                panel = this;
+                container.insertBefore(wrapper, link);
+                link.remove(false);
+                wrapper.appendChild(link);
+
+                // Add a for attribute to the link to link to the id of the panel.
+                if (!panel.get('id')) {
+                    panel.set('id', CSS.PANEL + COUNT);
+                }
+                wrapper.set('for', panel.get('id'));
+                // Add an aria attribute for the live region.
+                panel.set('aria-live', 'polite');
+
+                wrapper.addClass(CSS.LINK);
+                wrapper.addClass(CSS.CLOSED);
+                panel.addClass(CSS.PANEL);
+                panel.hide();
+                link = null;
+            } else {
+                link = this;
+            }
+        });
+
+        // Setup event listeners.
+        this.delegate('click', TOGGLE, '.' + CSS.LINK);
+    };
+
+// Use addMethod to add history to the Node prototype:
+Y.Node.addMethod("history", HISTORY);
+
+// Extend this functionality to NodeLists.
+Y.NodeList.importMethod(Y.Node.prototype, "history");
+
+
+}, '@VERSION@', {"requires": ["node", "transition"]});
diff --git a/mod/assign/yui/build/moodle-mod_assign-history/moodle-mod_assign-history-min.js b/mod/assign/yui/build/moodle-mod_assign-history/moodle-mod_assign-history-min.js
new file mode 100644
index 00000000000..81dd1a95e0e
--- /dev/null
+++ b/mod/assign/yui/build/moodle-mod_assign-history/moodle-mod_assign-history-min.js
@@ -0,0 +1 @@
+YUI.add("moodle-mod_assign-history",function(e,t){var n={LINK:"mod-assign-history-link",OPEN:"mod-assign-history-link-open",CLOSED:"mod-assign-history-link-closed",PANEL:"mod-assign-history-panel"},r=0,i=function(){var t=this.get("for"),r=e.one("#"+t);this.hasClass(n.OPEN)?(this.removeClass(n.OPEN),this.addClass(n.CLOSED),this.setStyle("overflow","hidden"),r.hide()):(this.removeClass(n.CLOSED),this.addClass(n.OPEN),r.show())},s=function(){var t=null,s=null,o=null,u=this;this.get("children").each(function(){t?(r++,o=e.Node.create("<a/>"),s=this,u.insertBefore(o,t),t.remove(!1),o.appendChild(t),s.get("id")||s.set("id",n.PANEL+r),o.set("for",s.get("id")),s.set("aria-live","polite"),o.addClass(n.LINK),o.addClass(n.CLOSED),s.addClass(n.PANEL),s.hide(),t=null):t=this}),this.delegate("click",i,"."+n.LINK)};e.Node.addMethod("history",s),e.NodeList.importMethod(e.Node.prototype,"history")},"@VERSION@",{requires:["node","transition"]});
diff --git a/mod/assign/yui/build/moodle-mod_assign-history/moodle-mod_assign-history.js b/mod/assign/yui/build/moodle-mod_assign-history/moodle-mod_assign-history.js
new file mode 100644
index 00000000000..73c93578fcd
--- /dev/null
+++ b/mod/assign/yui/build/moodle-mod_assign-history/moodle-mod_assign-history.js
@@ -0,0 +1,73 @@
+YUI.add('moodle-mod_assign-history', function (Y, NAME) {
+
+// Define a function that will run in the context of a
+// Node instance:
+var CSS = {
+        LINK: 'mod-assign-history-link',
+        OPEN: 'mod-assign-history-link-open',
+        CLOSED: 'mod-assign-history-link-closed',
+        PANEL: 'mod-assign-history-panel'
+    },
+    COUNT = 0,
+    TOGGLE = function() {
+        var id = this.get('for'),
+            panel = Y.one('#' + id);
+        if (this.hasClass(CSS.OPEN)) {
+            this.removeClass(CSS.OPEN);
+            this.addClass(CSS.CLOSED);
+            this.setStyle('overflow', 'hidden');
+            panel.hide();
+        } else {
+            this.removeClass(CSS.CLOSED);
+            this.addClass(CSS.OPEN);
+            panel.show();
+        }
+    },
+    HISTORY = function() {
+        var link = null,
+            panel = null,
+            wrapper = null,
+            container = this;
+
+        // Loop through all the children of this container and turn
+        // every odd node to a link to open/close the following panel.
+        this.get('children').each(function () {
+            if (link) {
+                COUNT++;
+                // First convert the link to an anchor.
+                wrapper = Y.Node.create('<a/>');
+                panel = this;
+                container.insertBefore(wrapper, link);
+                link.remove(false);
+                wrapper.appendChild(link);
+
+                // Add a for attribute to the link to link to the id of the panel.
+                if (!panel.get('id')) {
+                    panel.set('id', CSS.PANEL + COUNT);
+                }
+                wrapper.set('for', panel.get('id'));
+                // Add an aria attribute for the live region.
+                panel.set('aria-live', 'polite');
+
+                wrapper.addClass(CSS.LINK);
+                wrapper.addClass(CSS.CLOSED);
+                panel.addClass(CSS.PANEL);
+                panel.hide();
+                link = null;
+            } else {
+                link = this;
+            }
+        });
+
+        // Setup event listeners.
+        this.delegate('click', TOGGLE, '.' + CSS.LINK);
+    };
+
+// Use addMethod to add history to the Node prototype:
+Y.Node.addMethod("history", HISTORY);
+
+// Extend this functionality to NodeLists.
+Y.NodeList.importMethod(Y.Node.prototype, "history");
+
+
+}, '@VERSION@', {"requires": ["node", "transition"]});
diff --git a/mod/assign/yui/history/history.js b/mod/assign/yui/history/history.js
deleted file mode 100644
index 85ddeb7b6ba..00000000000
--- a/mod/assign/yui/history/history.js
+++ /dev/null
@@ -1,70 +0,0 @@
-YUI.add('moodle-mod_assign-history', function (Y) {
-    // Define a function that will run in the context of a
-    // Node instance:
-    var CSS = {
-            LINK: 'mod-assign-history-link',
-            OPEN: 'mod-assign-history-link-open',
-            CLOSED: 'mod-assign-history-link-closed',
-            PANEL: 'mod-assign-history-panel'
-        },
-        COUNT = 0,
-        TOGGLE = function() {
-            var id = this.get('for'),
-                panel = Y.one('#' + id);
-            if (this.hasClass(CSS.OPEN)) {
-                this.removeClass(CSS.OPEN);
-                this.addClass(CSS.CLOSED);
-                this.setStyle('overflow', 'hidden');
-                panel.hide();
-            } else {
-                this.removeClass(CSS.CLOSED);
-                this.addClass(CSS.OPEN);
-                panel.show();
-            }
-        },
-        HISTORY = function() {
-            var link = null,
-                panel = null,
-                wrapper = null,
-                container = this;
-
-            // Loop through all the children of this container and turn
-            // every odd node to a link to open/close the following panel.
-            this.get('children').each(function () {
-                if (link) {
-                    COUNT++;
-                    // First convert the link to an anchor.
-                    wrapper = Y.Node.create('<a/>');
-                    panel = this;
-                    container.insertBefore(wrapper, link);
-                    link.remove(false);
-                    wrapper.appendChild(link);
-
-                    // Add a for attribute to the link to link to the id of the panel.
-                    if (!panel.get('id')) {
-                        panel.set('id', CSS.PANEL + COUNT);
-                    }
-                    wrapper.set('for', panel.get('id'));
-                    // Add an aria attribute for the live region.
-                    panel.set('aria-live', 'polite');
-
-                    wrapper.addClass(CSS.LINK);
-                    wrapper.addClass(CSS.CLOSED);
-                    panel.addClass(CSS.PANEL);
-                    panel.hide();
-                    link = null;
-                } else {
-                    link = this;
-                }
-            });
-
-            // Setup event listeners.
-            this.delegate('click', TOGGLE, '.' + CSS.LINK);
-        };
-
-    // Use addMethod to add history to the Node prototype:
-    Y.Node.addMethod("history", HISTORY);
-
-    // Extend this functionality to NodeLists.
-    Y.NodeList.importMethod(Y.Node.prototype, "history");
-}, '@VERSION@', { requires: ['node', 'transition'] });
diff --git a/mod/assign/yui/src/history/build.json b/mod/assign/yui/src/history/build.json
new file mode 100644
index 00000000000..e99de89adb2
--- /dev/null
+++ b/mod/assign/yui/src/history/build.json
@@ -0,0 +1,10 @@
+{
+    "name": "moodle-mod_assign-history",
+    "builds": {
+        "moodle-mod_assign-history": {
+            "jsfiles": [
+                "history.js"
+            ]
+        }
+    }
+}
diff --git a/mod/assign/yui/src/history/js/history.js b/mod/assign/yui/src/history/js/history.js
new file mode 100644
index 00000000000..9dbafafe0d2
--- /dev/null
+++ b/mod/assign/yui/src/history/js/history.js
@@ -0,0 +1,68 @@
+// Define a function that will run in the context of a
+// Node instance:
+var CSS = {
+        LINK: 'mod-assign-history-link',
+        OPEN: 'mod-assign-history-link-open',
+        CLOSED: 'mod-assign-history-link-closed',
+        PANEL: 'mod-assign-history-panel'
+    },
+    COUNT = 0,
+    TOGGLE = function() {
+        var id = this.get('for'),
+            panel = Y.one('#' + id);
+        if (this.hasClass(CSS.OPEN)) {
+            this.removeClass(CSS.OPEN);
+            this.addClass(CSS.CLOSED);
+            this.setStyle('overflow', 'hidden');
+            panel.hide();
+        } else {
+            this.removeClass(CSS.CLOSED);
+            this.addClass(CSS.OPEN);
+            panel.show();
+        }
+    },
+    HISTORY = function() {
+        var link = null,
+            panel = null,
+            wrapper = null,
+            container = this;
+
+        // Loop through all the children of this container and turn
+        // every odd node to a link to open/close the following panel.
+        this.get('children').each(function () {
+            if (link) {
+                COUNT++;
+                // First convert the link to an anchor.
+                wrapper = Y.Node.create('<a/>');
+                panel = this;
+                container.insertBefore(wrapper, link);
+                link.remove(false);
+                wrapper.appendChild(link);
+
+                // Add a for attribute to the link to link to the id of the panel.
+                if (!panel.get('id')) {
+                    panel.set('id', CSS.PANEL + COUNT);
+                }
+                wrapper.set('for', panel.get('id'));
+                // Add an aria attribute for the live region.
+                panel.set('aria-live', 'polite');
+
+                wrapper.addClass(CSS.LINK);
+                wrapper.addClass(CSS.CLOSED);
+                panel.addClass(CSS.PANEL);
+                panel.hide();
+                link = null;
+            } else {
+                link = this;
+            }
+        });
+
+        // Setup event listeners.
+        this.delegate('click', TOGGLE, '.' + CSS.LINK);
+    };
+
+// Use addMethod to add history to the Node prototype:
+Y.Node.addMethod("history", HISTORY);
+
+// Extend this functionality to NodeLists.
+Y.NodeList.importMethod(Y.Node.prototype, "history");
diff --git a/mod/assign/yui/src/history/meta/history.json b/mod/assign/yui/src/history/meta/history.json
new file mode 100644
index 00000000000..a096c4a642b
--- /dev/null
+++ b/mod/assign/yui/src/history/meta/history.json
@@ -0,0 +1,8 @@
+{
+    "moodle-mod_assign-history": {
+        "requires": [
+            "node",
+            "transition"
+        ]
+    }
+}