2 files changed, 10 insertions, 16 deletions

diff --git a/29.md b/29.md
index b83d2db..0f4a579 100644
--- a/29.md
+++ b/29.md
@@ -52,29 +52,16 @@ This is the basic unit of a "microblog" root text note sent to a group.
   ...
 ```
 
-- *text reply note* (`kind:12`)
+- *threaded text reply* (`kind:12`)
 
-This is the basic unit of a "microblog" reply note sent to a group.
-
-```js
-  "kind": 12,
-  "content": "pizza is disgusting and you should be ashamed",
-  "tags": [
-    ["h", "<group-id>"],
-    ["e", "<reply-event-id>", "", "root"],
-    ["previous", "<event-id-first-chars>", "<event-id-first-chars>", ...]
-  ]
-  ...
-```
-
-Replies SHOULD use NIP-10 markers, leaving an empty relay url:
+This is the basic unit of a "microblog" reply note sent to a group. It's the same as `kind:11`, except for the fact that it must be used whenever it's in reply to some other note (either in reply to a `kind:11` or a `kind:12`). `kind:12` events SHOULD use NIP-10 markers, leaving an empty relay url:
 
 * `["e", "<kind-11-root-id>", "", "root"]`
 * `["e", "<kind-12-event-id>", "", "reply"]`
 
 - *chat message* (`kind:9`)
 
-Similar to `kind:11`, this is the basic unit of a chat message sent to a group.
+This is the basic unit of a _chat message_ sent to a group.
 
 ```js
   "kind": 9,
@@ -86,6 +73,12 @@ Similar to `kind:11`, this is the basic unit of a chat message sent to a group.
   ...
 ```
 
+- *chat message threaded reply* (`kind:10`)
+
+Similar to `kind:12`, this is the basic unit of a chat message sent to a group. This is intended for in-chat threads that may be hidden by default. Not all in-chat replies MUST use `kind:10`, only when the intention is to create a hidden thread that isn't part of the normal flow of the chat (although clients are free to display those by default too).
+
+`kind:10` SHOULD use NIP-10 markers, just like `kind:12`.
+
 - *join request* (`kind:9021`)
 
 Any user can send one of these events to the relay in order to be automatically or manually added to the group. If the group is `open` the relay will automatically issue a `kind:9000` in response adding this user. Otherwise group admins may choose to query for these requests and act upon them.
diff --git a/README.md b/README.md
index 0ee6039..3aa330d 100644
--- a/README.md
+++ b/README.md
@@ -94,6 +94,7 @@ They exist to document what may be implemented by [Nostr](https://github.com/nos
 | `7`           | Reaction                   | [25](25.md)              |
 | `8`           | Badge Award                | [58](58.md)              |
 | `9`           | Group Chat Message         | [29](29.md)              |
+| `10`          | Group Chat Threaded Reply  | [29](29.md)              |
 | `11`          | Group Thread               | [29](29.md)              |
 | `12`          | Group Thread Reply         | [29](29.md)              |
 | `13`          | Seal                       | [59](59.md)              |