diff --git a/docs/manifest-format.md b/docs/manifest-format.md
index 71fa04c54..06d370a3e 100644
--- a/docs/manifest-format.md
+++ b/docs/manifest-format.md
@@ -98,7 +98,9 @@ following DTD:
   <!ATTLIST linkfile src CDATA #REQUIRED>
   <!ATTLIST linkfile dest CDATA #REQUIRED>
 
-  <!ELEMENT extend-project EMPTY>
+  <!ELEMENT extend-project (annotation*,
+                            copyfile*,
+                            linkfile*)>
   <!ATTLIST extend-project name CDATA #REQUIRED>
   <!ATTLIST extend-project path CDATA #IMPLIED>
   <!ATTLIST extend-project dest-path CDATA #IMPLIED>
@@ -427,19 +429,20 @@ Same syntax as the corresponding element of `project`.
 ### Element annotation
 
 Zero or more annotation elements may be specified as children of a
-project or remote element. Each element describes a name-value pair.
-For projects, this name-value pair will be exported into each project's
-environment during a 'forall' command, prefixed with `REPO__`.  In addition,
-there is an optional attribute "keep" which accepts the case insensitive values
-"true" (default) or "false".  This attribute determines whether or not the
+project element, an extend-project element, or a remote element. Each
+element describes a name-value pair. For projects, this name-value pair
+will be exported into each project's environment during a 'forall'
+command, prefixed with `REPO__`.  In addition, there is an optional
+attribute "keep" which accepts the case insensitive values "true"
+(default) or "false". This attribute determines whether or not the
 annotation will be kept when exported with the manifest subcommand.
 
 ### Element copyfile
 
 Zero or more copyfile elements may be specified as children of a
-project element. Each element describes a src-dest pair of files;
-the "src" file will be copied to the "dest" place during `repo sync`
-command.
+project element, or an extend-project element. Each element describes a
+src-dest pair of files; the "src" file will be copied to the "dest"
+place during `repo sync` command.
 
 "src" is project relative, "dest" is relative to the top of the tree.
 Copying from paths outside of the project or to paths outside of the repo
diff --git a/manifest_xml.py b/manifest_xml.py
index 30c5b590b..5e0b53b99 100644
--- a/manifest_xml.py
+++ b/manifest_xml.py
@@ -1509,6 +1509,14 @@ https://gerrit.googlesource.com/git-repo/+/HEAD/docs/manifest-format.md
                         p.UpdatePaths(relpath, worktree, gitdir, objdir)
                         self._paths[p.relpath] = p
 
+                    for n in node.childNodes:
+                        if n.nodeName == "copyfile":
+                            self._ParseCopyFile(p, n)
+                        elif n.nodeName == "linkfile":
+                            self._ParseLinkFile(p, n)
+                        elif n.nodeName == "annotation":
+                            self._ParseAnnotation(p, n)
+
             if node.nodeName == "repo-hooks":
                 # Only one project can be the hooks project
                 if repo_hooks_project is not None:
@@ -1963,11 +1971,11 @@ https://gerrit.googlesource.com/git-repo/+/HEAD/docs/manifest-format.md
         for n in node.childNodes:
             if n.nodeName == "copyfile":
                 self._ParseCopyFile(project, n)
-            if n.nodeName == "linkfile":
+            elif n.nodeName == "linkfile":
                 self._ParseLinkFile(project, n)
-            if n.nodeName == "annotation":
+            elif n.nodeName == "annotation":
                 self._ParseAnnotation(project, n)
-            if n.nodeName == "project":
+            elif n.nodeName == "project":
                 project.subprojects.append(
                     self._ParseProject(n, parent=project)
                 )
diff --git a/tests/test_manifest_xml.py b/tests/test_manifest_xml.py
index ebc0ce58f..07939e168 100644
--- a/tests/test_manifest_xml.py
+++ b/tests/test_manifest_xml.py
@@ -1214,6 +1214,84 @@ class ExtendProjectElementTests(ManifestParseTestCase):
         self.assertEqual(len(manifest.projects), 1)
         self.assertEqual(manifest.projects[0].upstream, "bar")
 
+    def test_extend_project_copyfiles(self):
+        manifest = self.getXmlManifest(
+            """
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <project name="myproject" />
+  <extend-project name="myproject">
+    <copyfile src="foo" dest="bar" />
+  </extend-project>
+</manifest>
+"""
+        )
+        self.assertEqual(manifest.projects[0].copyfiles[0].src, "foo")
+        self.assertEqual(manifest.projects[0].copyfiles[0].dest, "bar")
+        self.assertEqual(
+            sort_attributes(manifest.ToXml().toxml()),
+            '<?xml version="1.0" ?><manifest>'
+            '<remote fetch="http://localhost" name="default-remote"/>'
+            '<default remote="default-remote" revision="refs/heads/main"/>'
+            '<project name="myproject">'
+            '<copyfile dest="bar" src="foo"/>'
+            "</project>"
+            "</manifest>",
+        )
+
+    def test_extend_project_linkfiles(self):
+        manifest = self.getXmlManifest(
+            """
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <project name="myproject" />
+  <extend-project name="myproject">
+    <linkfile src="foo" dest="bar" />
+  </extend-project>
+</manifest>
+"""
+        )
+        self.assertEqual(manifest.projects[0].linkfiles[0].src, "foo")
+        self.assertEqual(manifest.projects[0].linkfiles[0].dest, "bar")
+        self.assertEqual(
+            sort_attributes(manifest.ToXml().toxml()),
+            '<?xml version="1.0" ?><manifest>'
+            '<remote fetch="http://localhost" name="default-remote"/>'
+            '<default remote="default-remote" revision="refs/heads/main"/>'
+            '<project name="myproject">'
+            '<linkfile dest="bar" src="foo"/>'
+            "</project>"
+            "</manifest>",
+        )
+
+    def test_extend_project_annotations(self):
+        manifest = self.getXmlManifest(
+            """
+<manifest>
+  <remote name="default-remote" fetch="http://localhost" />
+  <default remote="default-remote" revision="refs/heads/main" />
+  <project name="myproject" />
+  <extend-project name="myproject">
+    <annotation name="foo" value="bar" />
+  </extend-project>
+</manifest>
+"""
+        )
+        self.assertEqual(manifest.projects[0].annotations[0].name, "foo")
+        self.assertEqual(manifest.projects[0].annotations[0].value, "bar")
+        self.assertEqual(
+            sort_attributes(manifest.ToXml().toxml()),
+            '<?xml version="1.0" ?><manifest>'
+            '<remote fetch="http://localhost" name="default-remote"/>'
+            '<default remote="default-remote" revision="refs/heads/main"/>'
+            '<project name="myproject">'
+            '<annotation name="foo" value="bar"/>'
+            "</project>"
+            "</manifest>",
+        )
+
 
 class NormalizeUrlTests(ManifestParseTestCase):
     """Tests for normalize_url() in manifest_xml.py"""