Took a look at MSC2088 (room-subtyping)

proposals/4036-room-organization-by-promoting-threads.md

@@ -1,4 +1,4 @@
-# MSC436: Room oranization by promoting threads
+# MSC436: Room organization by promoting threads
 
 Sometimes, having a discussion in a busy room can be difficult.
 People are often simply replying with a message event which is technically not related (`m.relates_to`) using replies (`m.in_reply_to`) or threads (`m.thread`) with the previous messages of the conversation making separation of one conversation from others difficult.
@@ -10,7 +10,7 @@ This MSC solely proposes client-side behavior.
 
 ## Proposal
 
-Standardize a room state `m.promote_threads` (`dev.coffeeco.promote_threads` for non-finalized implementations of this MSC) with a Boolean value or an object, defaulting to `false`.
+Standardize a room state `m.promote_threads` (`dev.coffeeco.MSC4036.promote_threads` for non-finalized implementations of this MSC) with a Boolean value or an object, defaulting to `false`.
 
 The value SHOULD NOT be set to an object
 but clients MUST consider an object as implicating a value of `true` (possibly with additional behavior changes)
@@ -56,15 +56,31 @@ The object may contain a strings,
 for example to specify the label of the button to access the message input box outside the scope of a thread
 (e.g. "Ask a new question", "Open a new issue").
 
+[MSC3088: room-subtyping](https://github.com/matrix-org/matrix-spec-proposals/blob/travis/msc/mutable-subtypes/proposals/3088-room-subtyping.md)
+proposes specification for room purposes,
+e.g. data-driven spaces or DM rooms.
+The proposed behavior of this MSC could be applied to a further room purpose, a `m.discussions` (or `dev.coffeeco.MSC4036.discussions`).
+E.g. like:
+```json
+{
+  "type": "m.room.purpose",
+  "state_key": "m.discussions",
+  "content": {
+    "m.promote_threads": true
+  }
+}
+```
+
 ## Security considerations
 
 Not applicable
 
 ## Unstable prefix
 
 For the proposed `m.promote_threads` state key,
-the unstable `dev.coffeeco.promote_threads` shall be used.
+the unstable `dev.coffeeco.MSC4036.promote_threads` shall be used.
 
 ## Dependencies
 
-None
+Potentially [MSC3088: room-subtyping](https://github.com/matrix-org/matrix-spec-proposals/blob/travis/msc/mutable-subtypes/proposals/3088-room-subtyping.md),
+if seen as an extension of it as depicted in the alternatives section.