diff --git a/subcmds/diff.py b/subcmds/diff.py
new file mode 100644
index 0000000..e024714
--- /dev/null
+++ b/subcmds/diff.py
@@ -0,0 +1,27 @@
+#
+# Copyright (C) 2008 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from command import PagedCommand
+
+class Diff(PagedCommand):
+  common = True
+  helpSummary = "Show changes between commit and working tree"
+  helpUsage = """
+%prog [<project>...]
+"""
+
+  def Execute(self, opt, args):
+    for project in self.GetProjects(args):
+      project.PrintWorkTreeDiff()