diff --git a/core/core.library.yml b/core/core.library.yml
index 3ae72a4..74ee00aa 100644
--- a/core/core.library.yml
+++ b/core/core.library.yml
@@ -1,7 +1,12 @@
+ckeditor:
+  version: VERSION
+  js:
+    - { file: assets/vendor/ckeditor/ckeditor.js, preprocess: false }
+
 drupal:
   version: VERSION
   js:
-    - { file: /misc/drupal.js, group: -100, weight: -18 }
+    - { file: misc/drupal.js, group: -100, weight: -18 }
   dependencies:
     - core/domready
 
@@ -13,7 +18,7 @@ drupalSettings:
 drupal.ajax:
   version: VERSION
   js:
-    - { file: /misc/ajax.js, group: -100, weight: 2 }
+    - { file: misc/ajax.js, group: -100, weight: 2 }
   dependencies:
     - core/jquery
     - core/drupal
@@ -24,7 +29,7 @@ drupal.ajax:
 drupal.announce:
   version: VERSION
   js:
-    - { file: /misc/announce.js, group: -100 }
+    - { file: misc/announce.js, group: -100 }
   dependencies:
     - core/drupal
     - core/drupal.debounce
@@ -32,7 +37,7 @@ drupal.announce:
 drupal.batch:
   version: VERSION
   js:
-    - { file: /misc/batch.js, group: 0, cache: false }
+    - { file: misc/batch.js, group: 0, cache: false }
   dependencies:
     - core/jquery
     - core/drupal
@@ -44,7 +49,7 @@ drupal.batch:
 drupal.progress:
   version: VERSION
   js:
-    - { file: /misc/progress.js, group: 0 }
+    - { file: misc/progress.js, group: 0 }
   dependencies:
     - core/drupal
     - core/jquery
@@ -53,7 +58,7 @@ drupal.progress:
 drupal.form:
   version: VERSION
   js:
-    - { file: /misc/form.js, group: -100, weight: 1 }
+    - { file: misc/form.js, group: -100, weight: 1 }
   dependencies:
     - core/jquery
     - core/drupal
@@ -63,10 +68,10 @@ drupal.form:
 drupal.dialog:
   version: VERSION
   js:
-    - { file: /misc/dialog.js, group: -100 }
-    - { file: /misc/dialog.position.js, group: -100 }
+    - { file: misc/dialog.js, group: -100 }
+    - { file: misc/dialog.position.js, group: -100 }
   css:
-    - { file: /misc/dialog.theme.css, weight: 1 }
+    - { file: misc/dialog.theme.css, weight: 1 }
   dependencies:
     - core/jquery
     - core/drupal
@@ -78,7 +83,7 @@ drupal.dialog:
 drupal.dialog.ajax:
   version: VERSION
   js:
-    - { file: /misc/dialog.ajax.js, group: -100, weight: 3 }
+    - { file: misc/dialog.ajax.js, group: -100, weight: 3 }
   dependencies:
     - core/jquery
     - core/drupal
@@ -89,7 +94,7 @@ drupal.dialog.ajax:
 drupal.states:
   version: VERSION
   js:
-    - { file: /misc/states.js, group: -100, weight: 1 }
+    - { file: misc/states.js, group: -100, weight: 1 }
   dependencies:
     - core/jquery
     - core/drupal
@@ -99,7 +104,7 @@ drupal.states:
 drupal.tabledrag:
   version: VERSION
   js:
-    - { file: /misc/tabledrag.js, group: -100, weight: -1 }
+    - { file: misc/tabledrag.js, group: -100, weight: -1 }
   dependencies:
     - core/jquery
     - core/modernizr
@@ -111,7 +116,7 @@ drupal.tabledrag:
 drupal.tableresponsive:
   version: VERSION
   js:
-    - { file: /misc/tableresponsive.js, group: -100 }
+    - { file: misc/tableresponsive.js, group: -100 }
   dependencies:
     - core/jquery
     - core/drupal
@@ -120,7 +125,7 @@ drupal.tableresponsive:
 drupal.collapse:
   version: VERSION
   js:
-    - { file: /misc/collapse.js, group: 0 }
+    - { file: misc/collapse.js, group: 0 }
   dependencies:
     - core/jquery
     - core/modernizr
@@ -131,7 +136,7 @@ drupal.collapse:
 drupal.autocomplete:
   version: VERSION
   js:
-    - { file: /misc/autocomplete.js, group: 0, weight: -1 }
+    - { file: misc/autocomplete.js, group: 0, weight: -1 }
   dependencies:
     - core/jquery
     - core/drupal
@@ -142,7 +147,7 @@ drupal.autocomplete:
 drupal.displace:
   version: VERSION
   js:
-    - { file: /misc/displace.js, group: -100 }
+    - { file: misc/displace.js, group: -100 }
   dependencies:
     - core/jquery
     - core/drupal
@@ -151,7 +156,7 @@ drupal.displace:
 drupal.tabbingmanager:
   version: VERSION
   js:
-    - { file: /misc/tabbingmanager.js, group: -100 }
+    - { file: misc/tabbingmanager.js, group: -100 }
   dependencies:
     - core/jquery
     - core/jquery.ui.core
@@ -160,7 +165,7 @@ drupal.tabbingmanager:
 drupal.debounce:
   version: VERSION
   js:
-    - { file: /misc/debounce.js, group: -100 }
+    - { file: misc/debounce.js, group: -100 }
   dependencies:
     - core/drupal
 
@@ -199,10 +204,10 @@ jquery.bbq:
 drupal.dropbutton:
   version: VERSION
   js:
-    - { file: /misc/dropbutton/dropbutton.js }
+    - { file: misc/dropbutton/dropbutton.js }
   css:
-    - { file: /misc/dropbutton/dropbutton.css }
-    - { file: /misc/dropbutton/dropbutton.theme.css }
+    - { file: misc/dropbutton/dropbutton.css }
+    - { file: misc/dropbutton/dropbutton.theme.css }
   dependencies:
     - core/jquery
     - core/drupal
@@ -212,9 +217,9 @@ drupal.dropbutton:
 drupal.vertical-tabs:
   version: VERSION
   js:
-    - { file: /misc/vertical-tabs.js }
+    - { file: misc/vertical-tabs.js }
   css:
-    - { file: /misc/vertical-tabs.css }
+    - { file: misc/vertical-tabs.css }
   dependencies:
     - core/jquery
     - core/drupal
@@ -224,7 +229,7 @@ drupal.vertical-tabs:
 matchmedia:
   version: VERSION
   js:
-    - { file: /misc/matchmedia.js }
+    - { file: misc/matchmedia.js }
   dependencies:
     - core/drupal.debounce
 
@@ -573,7 +578,7 @@ jquery.cookie:
 drupal.tableselect:
   version: VERSION
   js:
-    - { file: /misc/tableselect.js }
+    - { file: misc/tableselect.js }
   dependencies:
     - core/drupal
     - core/jquery
@@ -581,7 +586,7 @@ drupal.tableselect:
 drupal.tableheader:
   version: VERSION
   js:
-    - { file: /misc/tableheader.js }
+    - { file: misc/tableheader.js }
   dependencies:
     - core/jquery
     - core/drupal
@@ -592,7 +597,7 @@ drupal.tableheader:
 drupal.timezone:
   version: VERSION
   js:
-    - { file: /misc/timezone.js }
+    - { file: misc/timezone.js }
   dependencies:
     - core/jquery
     - core/drupal
@@ -600,7 +605,7 @@ drupal.timezone:
 drupal.machine-name:
   version: VERSION
   js:
-    - { file: /misc/machine-name.js }
+    - { file: misc/machine-name.js }
   dependencies:
     - core/jquery
     - core/jquery.once
diff --git a/core/includes/common.inc b/core/includes/common.inc
index e6f7f65..fd274b8 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -2765,6 +2765,8 @@ function drupal_get_library($module, $name = NULL) {
     $library_info = 'core/core.library.yml';
   }
   else {
+    // @todo Add a $type argument OR automatically figure out the type based on
+    //   current extension data, possibly using a module->theme fallback mechanism.
     $module_path = drupal_get_path('module', $module);
     if (in_array($module, array('seven', 'bartik'))) {
       $module_path = drupal_get_path('theme', $module);
diff --git a/core/modules/ckeditor/ckeditor.library.yml b/core/modules/ckeditor/ckeditor.library.yml
index 674a201..e747149 100644
--- a/core/modules/ckeditor/ckeditor.library.yml
+++ b/core/modules/ckeditor/ckeditor.library.yml
@@ -9,7 +9,7 @@ drupal.ckeditor:
     - core/jquery
     - core/drupal
     - core/drupal.debounce
-    - ckeditor/ckeditor
+    - core/ckeditor
     - editor/drupal.editor
 drupal.ckeditor.admin:
   version: VERSION
@@ -17,7 +17,7 @@ drupal.ckeditor.admin:
     - { file: js/ckeditor.admin.js }
   css:
     - { file: css/ckeditor.admin.css }
-    - { asset: ckeditor/skins/moono/editor.css }
+    - { file: /core/assets/vendor/ckeditor/skins/moono/editor.css }
   dependencies:
     - core/jquery
     - core/drupal
@@ -29,7 +29,7 @@ drupal.ckeditor.admin:
     - core/backbone
     - core/drupal.dialog
     - core/drupal.announce
-    - ckeditor/ckeditor
+    - core/ckeditor
     - editor/drupal.editor.admin
     - core/drupal.vertical-tabs
 drupal.ckeditor.drupalimage.admin:
@@ -57,8 +57,4 @@ drupal.ckeditor.drupalimagecaption-theme:
   js:
     - { file: js/plugins/drupalimagecaption/theme.js }
   dependencies:
-    - ckeditor/ckeditor
-ckeditor:
-  version: VERSION
-  js:
-    - { asset: ckeditor/ckeditor.js, preprocess: false }
+    - core/ckeditor