diff --git a/collects/framework/private/mode.ss b/collects/framework/private/mode.ss
new file mode 100644
index 00000000..abbc8adb
--- /dev/null
+++ b/collects/framework/private/mode.ss
@@ -0,0 +1,53 @@
+(module mode mzscheme
+  (require (lib "delegate.ss")
+           (lib "unitsig.ss")
+           "sig.ss")
+  
+  (provide mode@)
+  
+  (define mode@
+    (unit/sig framework:mode^
+      (import)
+      
+      (define-values (delegating-text-mixin text% text<%>)
+        (delegate
+         (on-change ())
+         (on-char (event))
+         (on-default-char (event))
+         (on-default-event (event))
+         (on-display-size ())
+         (on-edit-sequence ())
+         (on-event (event))
+         (on-focus (on?))
+         (on-load-file (filename format))
+         (on-local-char (event))
+         (on-local-event (event))
+         (on-new-box (type))
+         (on-new-image-snip (filename kind relative-path? inline?))
+         (on-paint (before? dc left top right bottom dx dy draw-caret))
+         (on-save-file (filename format))
+         (on-snip-modified (snip modified?))
+         
+         (on-change-style (start len))
+         (on-delete (start len))
+         (on-insert (start len))
+         (on-new-string-snip ())
+         (on-new-tab-snip ())
+         (on-set-size-constraint ())
+         
+         (after-change-style (start len))
+         (after-delete (start len))
+         (after-insert (start len))
+         (after-set-position ())
+         (after-set-size-constraint ())
+         (after-edit-sequence ())
+         (after-load-file (success?))
+         (after-save-file (success?))
+         
+         (can-change-style? (start len))
+         (can-delete? (start len))
+         (can-insert? (start len))
+         (can-set-size-constraint? ())
+         (can-do-edit-operation? (op recursive?))
+         (can-load-file? (filename format))
+         (can-save-file? (filename format)))))))
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