Two new event types for watchers

on_title_change and on_set_user_var

docs/changelog.rst

@@ -68,6 +68,8 @@ Detailed list of changes
 
 - Fix a regression that broke ``kitten update-self`` (:iss:`6729`)
 
+- Two new event types for :ref:`watchers <watchers>`, :code:`on_title_change` and :code:`on_set_user_var`
+
 
 0.30.1 [2023-10-05]
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

docs/launch.rst

@@ -133,8 +133,17 @@ functions for the events you are interested in, for example:
 
     def on_close(boss: Boss, window: Window, data: Dict[str, Any])-> None:
         # called when window is closed, typically when the program running in
-        # it exits.
+        # it exits
 
+    def on_set_user_var(boss: Boss, window: Window, data: Dict[str, Any]) -> None:
+        # called when a "user variable" is set or deleted on a window. Here
+        # data will contain key and value
+
+    def on_title_change(boss: Boss, window: Window, data: Dict[str, Any]) -> None:
+        # called when the window title is changed on a window. Here
+        # data will contain title and from_child. from_child will be True
+        # when a title change was requested via escape code from the program
+        # running in the terminal
 
 Every callback is passed a reference to the global ``Boss`` object as well as
 the ``Window`` object the action is occurring on. The ``data`` object is a dict