diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -439,6 +439,24 @@
         return self._changeset.date
     def files(self):
         return self._changeset.files
+    def modified(self):
+        modified = set(self.files())
+        modified.difference_update(self.added())
+        modified.difference_update(self.removed())
+        return sorted(modified)
+    def added(self):
+        added = []
+        for f in self.files():
+            if not any(f in p for p in self.parents()):
+                added.append(f)
+        return added
+    def removed(self):
+        removed = []
+        for f in self.files():
+            if f not in self:
+                removed.append(f)
+        return removed
+
     @propertycache
     def _copies(self):
         source = self._repo.ui.config('experimental', 'copies.read-from')