Add provisional API notes

redbot/core/utils/menus.py

@@ -76,6 +76,12 @@ async def menu(
     This parameter should be the 7th one, and none of the
     parameters in the handling functions are optional.
 
+    .. warning::
+
+        The ``user`` parameter is considered provisional.
+        If no issues arise, we plan on including it under developer guarantees
+        in the first release made after 2024-05-18.
+
     .. warning::
 
         If you're using the ``user`` param, you need to pass it
@@ -158,6 +164,12 @@ async def control_no(*args, **kwargs):
     user: Optional[discord.User]
         The user allowed to interact with the menu. Defaults to ``ctx.author``.
 
+        .. warning::
+
+            This parameter is provisional.
+            If no issues arise, we plan on including it under developer guarantees
+            in the first release made after 2024-05-18.
+
     Raises
     ------
     RuntimeError

redbot/core/utils/views.py

@@ -245,13 +245,25 @@ async def start(
         """
         Used to start the menu displaying the first page requested.
 
+        .. warning::
+
+            The ``user`` parameter is considered provisional.
+            If no issues arise, we plan on including it under developer guarantees
+            in the first release made after 2024-05-18.
+
         Parameters
         ----------
             ctx: `commands.Context`
                 The context to start the menu in.
             user: discord.User
                 The user allowed to interact with the menu.
                 If this is ``None``, ``ctx.author`` will be able to interact with the menu.
+
+                .. warning::
+
+                    This parameter is provisional.
+                    If no issues arise, we plan on including it under developer guarantees
+                    in the first release made after 2024-05-18.
             ephemeral: `bool`
                 Send the message ephemerally. This only works
                 if the context is from a slash command interaction.