diff --git a/lib/shared/mention-utils.js b/lib/shared/mention-utils.js
--- a/lib/shared/mention-utils.js
+++ b/lib/shared/mention-utils.js
@@ -11,6 +11,7 @@
 import {
   type ThreadInfo,
   type RelativeMemberInfo,
+  type ResolvedThreadInfo,
 } from '../types/thread-types.js';
 
 export type TypeaheadMatchedStrings = {
@@ -28,7 +29,14 @@
   +userInfo: RelativeMemberInfo,
 };
 
-export type MentionTypeaheadSuggestionItem = MentionTypeaheadUserSuggestionItem;
+type MentionTypeaheadChatSuggestionItem = {
+  +type: 'chat',
+  +chat: ResolvedThreadInfo,
+};
+
+export type MentionTypeaheadSuggestionItem =
+  | MentionTypeaheadUserSuggestionItem
+  | MentionTypeaheadChatSuggestionItem;
 
 export type TypeaheadTooltipActionItem<SuggestionItemType> = {
   +key: string,
diff --git a/native/chat/chat-input-bar.react.js b/native/chat/chat-input-bar.react.js
--- a/native/chat/chat-input-bar.react.js
+++ b/native/chat/chat-input-bar.react.js
@@ -69,11 +69,11 @@
 } from 'lib/types/message-types.js';
 import type { Dispatch } from 'lib/types/redux-types.js';
 import { threadPermissions } from 'lib/types/thread-permission-types.js';
-import {
-  type ThreadInfo,
-  type ClientThreadJoinRequest,
-  type ThreadJoinPayload,
-  type RelativeMemberInfo,
+import type {
+  ThreadInfo,
+  ClientThreadJoinRequest,
+  ThreadJoinPayload,
+  RelativeMemberInfo,
 } from 'lib/types/thread-types.js';
 import { type UserInfos } from 'lib/types/user-types.js';
 import {
diff --git a/native/utils/typeahead-utils.js b/native/utils/typeahead-utils.js
--- a/native/utils/typeahead-utils.js
+++ b/native/utils/typeahead-utils.js
@@ -6,6 +6,7 @@
 import { oldValidUsernameRegexString } from 'lib/shared/account-utils.js';
 import {
   getNewTextAndSelection,
+  encodeChatMentionText,
   type Selection,
   type TypeaheadTooltipActionItem,
   type MentionTypeaheadSuggestionItem,
@@ -65,6 +66,30 @@
           userInfo,
         },
       });
+    } else if (suggestion.type === 'chat') {
+      const { chat } = suggestion;
+      const mentionText = `@[[${chat.id}:${encodeChatMentionText(
+        chat.uiName,
+      )}]]`;
+      actions.push({
+        key: chat.id,
+        execute: () => {
+          const { newText, newSelectionStart } = getNewTextAndSelection(
+            textBeforeAtSymbol,
+            text,
+            textPrefix,
+            mentionText,
+          );
+          focusAndUpdateTextAndSelection(newText, {
+            start: newSelectionStart,
+            end: newSelectionStart,
+          });
+        },
+        actionButtonContent: {
+          type: 'chat',
+          chat,
+        },
+      });
     }
   }
   return actions;