diff -r d3ad50b40a4e -r f9743b13de6d hgext3rd/topic/__init__.py
--- a/hgext3rd/topic/__init__.py	Thu Oct 10 08:22:41 2019 +0700
+++ b/hgext3rd/topic/__init__.py	Sun Oct 06 02:30:12 2019 -0400
@@ -634,7 +634,8 @@
         (b'', b'age', False, b'show when you last touched the topics'),
         (b'', b'current', None, b'display the current topic only'),
     ] + commands.formatteropts,
-    _(b'hg topics [TOPIC]'))
+    _(b'hg topics [TOPIC]'),
+    **compat.helpcategorykwargs('CATEGORY_CHANGE_ORGANIZATION'))
 def topics(ui, repo, topic=None, **opts):
     """View current topic, set current topic, change topic for a set of revisions, or see all topics.
 
@@ -777,7 +778,8 @@
         (b'c', b'children', None,
             _(b'display data about children outside of the stack'))
     ] + commands.formatteropts,
-    _(b'hg stack [TOPIC]'))
+    _(b'hg stack [TOPIC]'),
+    **compat.helpcategorykwargs('CATEGORY_CHANGE_NAVIGATION'))
 def cmdstack(ui, repo, topic=b'', **opts):
     """list all changesets in a topic and other information