From 621b291da16f8fb55a2bc30a1e50da157d846c03 Mon Sep 17 00:00:00 2001
From: Evgeny <evgeny@poberezkin.com>
Date: Wed, 29 Jan 2025 13:04:48 +0000
Subject: [PATCH] core: member mentions, types and rfc (#5555)

* core: member mentions, types and rfc

* update

* update rfc

* save/get mentions (WIP)

* markdown

* store received mentions and userMention flag

* sent mentions

* update message with mentions

* db queries

* CLI mentions, test passes

* use maps for mentions

* tests

* comment

* save mentions on sent messages

* postresql schema

* refactor

* M.empty

* include both displayName and localAlias into MentionedMemberInfo

* fix saving sent mentions

* include mentions in previews

* update plans
---
 .../src/Directory/Events.hs                   |   9 +-
 docs/rfcs/2025-01-20-member-mentions.md       |  60 +++++
 .../typescript/src/command.ts                 |   9 -
 simplex-chat.cabal                            |   1 +
 src/Simplex/Chat/Bot.hs                       |   6 +-
 src/Simplex/Chat/Controller.hs                |  40 ++--
 src/Simplex/Chat/Library/Commands.hs          | 220 ++++++++++--------
 src/Simplex/Chat/Library/Internal.hs          | 174 ++++++++++----
 src/Simplex/Chat/Library/Subscriber.hs        |  89 ++++---
 src/Simplex/Chat/Markdown.hs                  |  27 ++-
 src/Simplex/Chat/Messages.hs                  |  51 ++--
 src/Simplex/Chat/Protocol.hs                  |  46 +++-
 src/Simplex/Chat/Store/Groups.hs              |  35 ++-
 src/Simplex/Chat/Store/Messages.hs            | 113 ++++++---
 .../Postgres/Migrations/M20241220_initial.hs  |  14 +-
 src/Simplex/Chat/Store/SQLite/Migrations.hs   |   4 +-
 .../SQLite/Migrations/M20250126_mentions.hs   |  37 +++
 .../SQLite/Migrations/chat_query_plans.txt    |  52 ++++-
 .../Store/SQLite/Migrations/chat_schema.sql   |  22 +-
 src/Simplex/Chat/Store/Shared.hs              |   2 +
 src/Simplex/Chat/Terminal/Output.hs           |   6 +-
 src/Simplex/Chat/Types.hs                     |   7 +-
 src/Simplex/Chat/Util.hs                      |   8 +-
 src/Simplex/Chat/View.hs                      |  19 +-
 tests/ChatTests/Direct.hs                     |   6 +-
 tests/ChatTests/Files.hs                      |   4 +-
 tests/ChatTests/Groups.hs                     |  72 +++++-
 tests/MarkdownTests.hs                        |  22 +-
 tests/ProtocolTests.hs                        |  14 +-
 tests/SchemaDump.hs                           |   4 +-
 tests/ValidNames.hs                           |   1 +
 31 files changed, 858 insertions(+), 316 deletions(-)
 create mode 100644 docs/rfcs/2025-01-20-member-mentions.md
 create mode 100644 src/Simplex/Chat/Store/SQLite/Migrations/M20250126_mentions.hs

diff --git a/apps/simplex-directory-service/src/Directory/Events.hs b/apps/simplex-directory-service/src/Directory/Events.hs
index 19c9405358..77f21337f7 100644
--- a/apps/simplex-directory-service/src/Directory/Events.hs
+++ b/apps/simplex-directory-service/src/Directory/Events.hs
@@ -30,6 +30,7 @@ import qualified Data.Text as T
 import Data.Text.Encoding (encodeUtf8)
 import Directory.Store
 import Simplex.Chat.Controller
+import Simplex.Chat.Markdown (displayNameTextP)
 import Simplex.Chat.Messages
 import Simplex.Chat.Messages.CIContent
 import Simplex.Chat.Protocol (MsgContent (..))
@@ -222,13 +223,7 @@ directoryCmdP =
       DCInviteOwnerToGroup_ -> gc DCInviteOwnerToGroup
       DCExecuteCommand_ -> DCExecuteCommand . T.unpack <$> (A.space *> A.takeText)
       where
-        gc f = f <$> (A.space *> A.decimal <* A.char ':') <*> displayNameP
-        displayNameP = quoted '\'' <|> takeNameTill (== ' ')
-        takeNameTill p =
-          A.peekChar' >>= \c ->
-            if refChar c then A.takeTill p else fail "invalid first character in display name"
-        quoted c = A.char c *> takeNameTill (== c) <* A.char c
-        refChar c = c > ' ' && c /= '#' && c /= '@'
+        gc f = f <$> (A.space *> A.decimal <* A.char ':') <*> displayNameTextP
 
 viewName :: Text -> Text
 viewName n = if any (== ' ') (T.unpack n) then "'" <> n <> "'" else n
diff --git a/docs/rfcs/2025-01-20-member-mentions.md b/docs/rfcs/2025-01-20-member-mentions.md
new file mode 100644
index 0000000000..fdb35c608b
--- /dev/null
+++ b/docs/rfcs/2025-01-20-member-mentions.md
@@ -0,0 +1,60 @@
+# Member mentions
+
+## Problem
+
+Mention members in the messages.
+
+There are several UX objectives that mentions must deliver:
+- to notify the user about the messages that mention the user or to reply to user's messages - groups must have this notification mode (already present in the API),
+- to allow the user to navigate to unread mentions and replies,
+- to highlight mentions and allow all users to open mentioned member profile - this is the least important objective.
+
+## Solution
+
+Message text should include the reference to the shared member display name:
+
+```
+Hello @name
+```
+
+or
+
+```
+Hello @'member name'
+```
+
+This is the same format that people already use and that is currently supported in the API. The name in the message should use the display name at the time of mention, both for backwards compatibility and for better view in compose field, and the message should additionally include the mapping from used display names to shared group member IDs, and the UI would show the current display name (at the time of loading the message to the view).
+
+For this mapping the message JSON will include the array of mentions, as objects with properties `displayName` and `memberId`. This is to ensure the intent and that the fragments of text are treated as mentions.
+
+Using an immutable `memberId` would prevent any race conditions and duplicate display names. The receiving client would show a local view name (display name or an alias), and might open a correct member card when mention is tapped.
+
+As display names are not unique in the group, we should convert them to locally-unique names (per message), by appending _1, _2, as necessary, and the same locally unique names should be used in the mapping to member IDs. These locally unique names must NOT use local user aliases, and must NOT use localDisplayName, as otherwise it may leak information that is known only to the user's client.
+
+There should be a reasonable limit on the number of mentions per message, e.g. 3. This is to prevent abuse, expensive processing both in the client and in super-peers that would have to forward member profiles if they were not forwarded before. This limit has to be enforced both on sending and receiving ends.
+
+## UX for sending mentions
+
+When a member types '@' character in the entry field, the app would show the paginated list of most recently active members, with search. This requires a separate API, and the same API can be used to show a paginated member list - loading the full list is already quite expensive with groups over 1-2k members.
+
+## UX for navigating to mentions
+
+The current circles with unread messages should indicate the number of unread mentions (including replies) above and below the view. Tapping the circle should navigate to the next unread mention, and not to the bottom/top of the conversation. Long-pressing the circle should offer the option to navigate to the top/bottom. In the absense of mentions, tapping circles would navigate to top/bottom.
+
+## Message UI
+
+Item text will include markdown elements for mentioned members. This will be used when rendering to show member display names or local aliases.
+
+Chat items data will include the list of members used in the chat item, including view names and member IDs.
+
+## Forwarding and saving to local items
+
+When forwarding to another conversation or saving to notes a message with mentions the app should use:
+- current display names instead of display names used in the message.
+- remove mentions mapping from the message data.
+
+## Schema
+
+Two new columns for chat_items table:
+- user_mention - 0 or 1 to indicate whether a message is a reply to user's message or mentions user.
+- member_mentions - the object mapping display names to member IDs, either as JSON, or in a more economical comma-separated list of "ID:name" strings (or "ID:'member name'). This field can be processed to load mention information, with the limit of 3 mentions per message it's sufficient.
diff --git a/packages/simplex-chat-client/typescript/src/command.ts b/packages/simplex-chat-client/typescript/src/command.ts
index e512e06672..135dc41ba7 100644
--- a/packages/simplex-chat-client/typescript/src/command.ts
+++ b/packages/simplex-chat-client/typescript/src/command.ts
@@ -29,7 +29,6 @@ export type ChatCommand =
   | APIRejectContact
   | APIUpdateProfile
   | APISetContactAlias
-  | APIParseMarkdown
   | NewGroup
   | APIAddMember
   | APIJoinGroup
@@ -128,7 +127,6 @@ type ChatCommandTag =
   | "apiRejectContact"
   | "apiUpdateProfile"
   | "apiSetContactAlias"
-  | "apiParseMarkdown"
   | "newGroup"
   | "apiAddMember"
   | "apiJoinGroup"
@@ -355,11 +353,6 @@ export interface APISetContactAlias extends IChatCommand {
   localAlias: string
 }
 
-export interface APIParseMarkdown extends IChatCommand {
-  type: "apiParseMarkdown"
-  text: string
-}
-
 export interface NewGroup extends IChatCommand {
   type: "newGroup"
   groupProfile: GroupProfile
@@ -732,8 +725,6 @@ export function cmdString(cmd: ChatCommand): string {
       return `/_profile ${cmd.userId} ${JSON.stringify(cmd.profile)}`
     case "apiSetContactAlias":
       return `/_set alias @${cmd.contactId} ${cmd.localAlias.trim()}`
-    case "apiParseMarkdown":
-      return `/_parse ${cmd.text}`
     case "newGroup":
       return `/_group ${JSON.stringify(cmd.groupProfile)}`
     case "apiAddMember":
diff --git a/simplex-chat.cabal b/simplex-chat.cabal
index 59385080d4..1df50de1a6 100644
--- a/simplex-chat.cabal
+++ b/simplex-chat.cabal
@@ -221,6 +221,7 @@ library
           Simplex.Chat.Store.SQLite.Migrations.M20250105_indexes
           Simplex.Chat.Store.SQLite.Migrations.M20250115_chat_ttl
           Simplex.Chat.Store.SQLite.Migrations.M20250122_chat_items_include_in_history
+          Simplex.Chat.Store.SQLite.Migrations.M20250126_mentions
   other-modules:
       Paths_simplex_chat
   hs-source-dirs:
diff --git a/src/Simplex/Chat/Bot.hs b/src/Simplex/Chat/Bot.hs
index 2f7e2f2abd..e1f5ce1ef9 100644
--- a/src/Simplex/Chat/Bot.hs
+++ b/src/Simplex/Chat/Bot.hs
@@ -11,7 +11,7 @@ import Control.Concurrent.Async
 import Control.Concurrent.STM
 import Control.Monad
 import qualified Data.ByteString.Char8 as B
-import Data.List.NonEmpty (NonEmpty (..))
+import qualified Data.Map.Strict as M
 import Data.Text (Text)
 import qualified Data.Text as T
 import Simplex.Chat.Controller
@@ -69,8 +69,8 @@ sendComposedMessage cc = sendComposedMessage' cc . contactId'
 
 sendComposedMessage' :: ChatController -> ContactId -> Maybe ChatItemId -> MsgContent -> IO ()
 sendComposedMessage' cc ctId quotedItemId msgContent = do
-  let cm = ComposedMessage {fileSource = Nothing, quotedItemId, msgContent}
-  sendChatCmd cc (APISendMessages (ChatRef CTDirect ctId) False Nothing (cm :| [])) >>= \case
+  let cm = ComposedMessage {fileSource = Nothing, quotedItemId, msgContent, mentions = M.empty}
+  sendChatCmd cc (APISendMessages (ChatRef CTDirect ctId) False Nothing [cm]) >>= \case
     CRNewChatItems {} -> printLog cc CLLInfo $ "sent message to contact ID " <> show ctId
     r -> putStrLn $ "unexpected send message response: " <> show r
 
diff --git a/src/Simplex/Chat/Controller.hs b/src/Simplex/Chat/Controller.hs
index 4ff29d6d6a..68c1bd2e92 100644
--- a/src/Simplex/Chat/Controller.hs
+++ b/src/Simplex/Chat/Controller.hs
@@ -39,6 +39,7 @@ import Data.Int (Int64)
 import Data.List.NonEmpty (NonEmpty)
 import Data.Map.Strict (Map)
 import qualified Data.Map.Strict as M
+import Data.Maybe (fromMaybe)
 import Data.String
 import Data.Text (Text)
 import Data.Text.Encoding (decodeLatin1)
@@ -313,7 +314,7 @@ data ChatCommand
   | APICreateChatItems {noteFolderId :: NoteFolderId, composedMessages :: NonEmpty ComposedMessage}
   | APIReportMessage {groupId :: GroupId, chatItemId :: ChatItemId, reportReason :: ReportReason, reportText :: Text}
   | ReportMessage {groupName :: GroupName, contactName_ :: Maybe ContactName, reportReason :: ReportReason, reportedMessage :: Text}
-  | APIUpdateChatItem {chatRef :: ChatRef, chatItemId :: ChatItemId, liveMessage :: Bool, msgContent :: MsgContent}
+  | APIUpdateChatItem {chatRef :: ChatRef, chatItemId :: ChatItemId, liveMessage :: Bool, updatedMessage :: UpdatedMessage}
   | APIDeleteChatItem ChatRef (NonEmpty ChatItemId) CIDeleteMode
   | APIDeleteMemberChatItem GroupId (NonEmpty ChatItemId)
   | APIChatItemReaction {chatRef :: ChatRef, chatItemId :: ChatItemId, add :: Bool, reaction :: MsgReaction}
@@ -346,7 +347,6 @@ data ChatCommand
   | APISetConnectionAlias Int64 LocalAlias
   | APISetUserUIThemes UserId (Maybe UIThemeEntityOverrides)
   | APISetChatUIThemes ChatRef (Maybe UIThemeEntityOverrides)
-  | APIParseMarkdown Text
   | APIGetNtfToken
   | APIRegisterToken DeviceToken NotificationsMode
   | APIVerifyToken DeviceToken C.CbNonce ByteString
@@ -1085,22 +1085,16 @@ data UserProfileUpdateSummary = UserProfileUpdateSummary
 data ComposedMessage = ComposedMessage
   { fileSource :: Maybe CryptoFile,
     quotedItemId :: Maybe ChatItemId,
-    msgContent :: MsgContent
+    msgContent :: MsgContent,
+    mentions :: Map MemberName GroupMemberId
   }
   deriving (Show)
 
--- This instance is needed for backward compatibility, can be removed in v6.0
-instance FromJSON ComposedMessage where
-  parseJSON (J.Object v) = do
-    fileSource <-
-      (v .:? "fileSource") >>= \case
-        Nothing -> CF.plain <$$> (v .:? "filePath")
-        f -> pure f
-    quotedItemId <- v .:? "quotedItemId"
-    msgContent <- v .: "msgContent"
-    pure ComposedMessage {fileSource, quotedItemId, msgContent}
-  parseJSON invalid =
-    JT.prependFailure "bad ComposedMessage, " (JT.typeMismatch "Object" invalid)
+data UpdatedMessage = UpdatedMessage
+  { msgContent :: MsgContent,
+    mentions :: Map MemberName GroupMemberId
+  }
+  deriving (Show)
 
 data ChatTagData = ChatTagData
   { emoji :: Maybe Text,
@@ -1273,7 +1267,6 @@ data ChatErrorType
   | CEFileNotApproved {fileId :: FileTransferId, unknownServers :: [XFTPServer]}
   | CEFallbackToSMPProhibited {fileId :: FileTransferId}
   | CEInlineFileProhibited {fileId :: FileTransferId}
-  | CEInvalidQuote
   | CEInvalidForward
   | CEInvalidChatItemUpdate
   | CEInvalidChatItemDelete
@@ -1635,4 +1628,19 @@ $(JQ.deriveFromJSON defaultJSON ''DBEncryptionConfig)
 
 $(JQ.deriveToJSON defaultJSON ''ComposedMessage)
 
+instance FromJSON ComposedMessage where
+  parseJSON (J.Object v) = do
+    fileSource <-
+      (v .:? "fileSource") >>= \case
+        Nothing -> CF.plain <$$> (v .:? "filePath")
+        f -> pure f
+    quotedItemId <- v .:? "quotedItemId"
+    msgContent <- v .: "msgContent"
+    mentions <- fromMaybe M.empty <$> v .:? "mentions"
+    pure ComposedMessage {fileSource, quotedItemId, msgContent, mentions}
+  parseJSON invalid =
+    JT.prependFailure "bad ComposedMessage, " (JT.typeMismatch "Object" invalid)
+
+$(JQ.deriveJSON defaultJSON ''UpdatedMessage)
+
 $(JQ.deriveToJSON defaultJSON ''ChatTagData)
diff --git a/src/Simplex/Chat/Library/Commands.hs b/src/Simplex/Chat/Library/Commands.hs
index 587f948941..7c2e6134c7 100644
--- a/src/Simplex/Chat/Library/Commands.hs
+++ b/src/Simplex/Chat/Library/Commands.hs
@@ -37,7 +37,7 @@ import Data.Either (fromRight, partitionEithers, rights)
 import Data.Foldable (foldr')
 import Data.Functor (($>))
 import Data.Int (Int64)
-import Data.List (find, foldl', isSuffixOf, partition, sortOn, zipWith4)
+import Data.List (find, foldl', isSuffixOf, partition, sortOn, zipWith5)
 import Data.List.NonEmpty (NonEmpty (..))
 import qualified Data.List.NonEmpty as L
 import Data.Map.Strict (Map)
@@ -80,7 +80,7 @@ import Simplex.Chat.Store.Shared
 import Simplex.Chat.Types
 import Simplex.Chat.Types.Preferences
 import Simplex.Chat.Types.Shared
-import Simplex.Chat.Util (liftIOEither)
+import Simplex.Chat.Util (liftIOEither, neUnzip3)
 import qualified Simplex.Chat.Util as U
 import Simplex.FileTransfer.Description (FileDescriptionURI (..), maxFileSize, maxFileSizeHard)
 import Simplex.Messaging.Agent as Agent
@@ -537,12 +537,13 @@ processChatCommand' vr = \case
           Just <$> withFastStore (\db -> getAChatItem db vr user (ChatRef CTGroup gId) fwdItemId)
         _ -> pure Nothing
   APISendMessages (ChatRef cType chatId) live itemTTL cms -> withUser $ \user -> mapM_ assertAllowedContent' cms >> case cType of
-    CTDirect ->
+    CTDirect -> do
+      mapM_ assertNoMentions cms
       withContactLock "sendMessage" chatId $
-        sendContactContentMessages user chatId live itemTTL (L.map (,Nothing) cms)
+        sendContactContentMessages user chatId live itemTTL (L.map composedMessageReq cms)
     CTGroup ->
       withGroupLock "sendMessage" chatId $
-        sendGroupContentMessages user chatId live itemTTL (L.map (,Nothing) cms)
+        sendGroupContentMessages user chatId live itemTTL (L.map composedMessageReq cms)
     CTLocal -> pure $ chatCmdError (Just user) "not supported"
     CTContactRequest -> pure $ chatCmdError (Just user) "not supported"
     CTContactConnection -> pure $ chatCmdError (Just user) "not supported"
@@ -567,8 +568,8 @@ processChatCommand' vr = \case
     withFastStore' $ \db -> reorderChatTags db user $ L.toList tagIds
     ok user
   APICreateChatItems folderId cms -> withUser $ \user -> do
-    mapM_ assertAllowedContent' cms
-    createNoteFolderContentItems user folderId (L.map (,Nothing) cms)
+    forM_ cms $ \cm -> assertAllowedContent' cm >> assertNoMentions cm
+    createNoteFolderContentItems user folderId (L.map composedMessageReq cms)
   APIReportMessage gId reportedItemId reportReason reportText -> withUser $ \user ->
     withGroupLock "reportMessage" gId $ do
       (gInfo, ms) <-
@@ -577,9 +578,9 @@ processChatCommand' vr = \case
           (gInfo,) <$> liftIO (getGroupModerators db vr user gInfo)
       let ms' = filter compatibleModerator ms
           mc = MCReport reportText reportReason
-          cm = ComposedMessage {fileSource = Nothing, quotedItemId = Just reportedItemId, msgContent = mc}
+          cm = ComposedMessage {fileSource = Nothing, quotedItemId = Just reportedItemId, msgContent = mc, mentions = M.empty}
       when (null ms') $ throwChatError $ CECommandError "no moderators support receiving reports"
-      sendGroupContentMessages_ user gInfo ms' False Nothing [(cm, Nothing)]
+      sendGroupContentMessages_ user gInfo ms' False Nothing [composedMessageReq cm]
     where
       compatibleModerator GroupMember {activeConn, memberChatVRange} =
         maxVersion (maybe memberChatVRange peerChatVRange activeConn) >= contentReportsVersion
@@ -587,8 +588,9 @@ processChatCommand' vr = \case
     gId <- withFastStore $ \db -> getGroupIdByName db user groupName
     reportedItemId <- withFastStore $ \db -> getGroupChatItemIdByText db user gId contactName_ reportedMessage
     processChatCommand $ APIReportMessage gId reportedItemId reportReason ""
-  APIUpdateChatItem (ChatRef cType chatId) itemId live mc -> withUser $ \user -> assertAllowedContent mc >> case cType of
+  APIUpdateChatItem (ChatRef cType chatId) itemId live (UpdatedMessage mc mentions) -> withUser $ \user -> assertAllowedContent mc >> case cType of
     CTDirect -> withContactLock "updateChatItem" chatId $ do
+      unless (null mentions) $ throwChatError $ CECommandError "mentions are not supported in this chat"
       ct@Contact {contactId} <- withFastStore $ \db -> getContact db vr user chatId
       assertDirectAllowed user MDSnd ct XMsgUpdate_
       cci <- withFastStore $ \db -> getDirectCIWithReactions db user ct itemId
@@ -599,7 +601,7 @@ processChatCommand' vr = \case
               let changed = mc /= oldMC
               if changed || fromMaybe False itemLive
                 then do
-                  (SndMessage {msgId}, _) <- sendDirectContactMessage user ct (XMsgUpdate itemSharedMId mc (ttl' <$> itemTimed) (justTrue . (live &&) =<< itemLive))
+                  (SndMessage {msgId}, _) <- sendDirectContactMessage user ct (XMsgUpdate itemSharedMId mc M.empty (ttl' <$> itemTimed) (justTrue . (live &&) =<< itemLive))
                   ci' <- withFastStore' $ \db -> do
                     currentTs <- liftIO getCurrentTime
                     when changed $
@@ -614,7 +616,8 @@ processChatCommand' vr = \case
     CTGroup -> withGroupLock "updateChatItem" chatId $ do
       Group gInfo@GroupInfo {groupId, membership} ms <- withFastStore $ \db -> getGroup db vr user chatId
       assertUserGroupRole gInfo GRAuthor
-      if prohibitedSimplexLinks gInfo membership mc
+      let (_, ft_) = msgContentTexts mc
+      if prohibitedSimplexLinks gInfo membership ft_
         then pure $ chatCmdError (Just user) ("feature not allowed " <> T.unpack (groupFeatureNameText GFSimplexLinks))
         else do
           cci <- withFastStore $ \db -> getGroupCIWithReactions db user gInfo itemId
@@ -625,19 +628,22 @@ processChatCommand' vr = \case
                   let changed = mc /= oldMC
                   if changed || fromMaybe False itemLive
                     then do
-                      SndMessage {msgId} <- sendGroupMessage user gInfo ms (XMsgUpdate itemSharedMId mc (ttl' <$> itemTimed) (justTrue . (live &&) =<< itemLive))
+                      (mentionedMembers, mentions') <- withFastStore $ \db -> getMentionedMembers db user gInfo ft_ mentions
+                      SndMessage {msgId} <- sendGroupMessage user gInfo ms (XMsgUpdate itemSharedMId mc mentions' (ttl' <$> itemTimed) (justTrue . (live &&) =<< itemLive))
                       ci' <- withFastStore' $ \db -> do
                         currentTs <- liftIO getCurrentTime
                         when changed $
                           addInitialAndNewCIVersions db itemId (chatItemTs' ci, oldMC) (currentTs, mc)
                         let edited = itemLive /= Just True
-                        updateGroupChatItem db user groupId ci (CISndMsgContent mc) edited live $ Just msgId
+                        ci' <- updateGroupChatItem db user groupId ci (CISndMsgContent mc) edited live $ Just msgId
+                        updateGroupCIMentions db gInfo ci' mentionedMembers
                       startUpdatedTimedItemThread user (ChatRef CTGroup groupId) ci ci'
                       pure $ CRChatItemUpdated user (AChatItem SCTGroup SMDSnd (GroupChat gInfo) ci')
                     else pure $ CRChatItemNotChanged user (AChatItem SCTGroup SMDSnd (GroupChat gInfo) ci)
                 _ -> throwChatError CEInvalidChatItemUpdate
             CChatItem SMDRcv _ -> throwChatError CEInvalidChatItemUpdate
     CTLocal -> do
+      unless (null mentions) $ throwChatError $ CECommandError "mentions are not supported in this chat"
       (nf@NoteFolder {noteFolderId}, cci) <- withFastStore $ \db -> (,) <$> getNoteFolder db user chatId <*> getLocalChatItem db user chatId itemId
       case cci of
         CChatItem SMDSnd ci@ChatItem {content = CISndMsgContent oldMC}
@@ -699,7 +705,7 @@ processChatCommand' vr = \case
       itemsMsgIds :: [CChatItem c] -> [SharedMsgId]
       itemsMsgIds = mapMaybe (\(CChatItem _ ChatItem {meta = CIMeta {itemSharedMsgId}}) -> itemSharedMsgId)
   APIDeleteMemberChatItem gId itemIds -> withUser $ \user -> withGroupLock "deleteChatItem" gId $ do
-    (gInfo@GroupInfo {membership}, items) <- getCommandGroupChatItems user gId itemIds
+    (gInfo, items) <- getCommandGroupChatItems user gId itemIds
     ms <- withFastStore' $ \db -> getGroupMembers db vr user gInfo
     assertDeletable gInfo items
     assertUserGroupRole gInfo GRAdmin -- TODO GRModerator when most users migrate
@@ -849,31 +855,33 @@ processChatCommand' vr = \case
     CTContactRequest -> pure $ chatCmdError (Just user) "not supported"
     CTContactConnection -> pure $ chatCmdError (Just user) "not supported"
     where
-      prepareForward :: User -> CM [ComposeMessageReq]
+      prepareForward :: User -> CM [ComposedMessageReq]
       prepareForward user = case fromCType of
         CTDirect -> withContactLock "forwardChatItem, from contact" fromChatId $ do
           (ct, items) <- getCommandDirectChatItems user fromChatId itemIds
           catMaybes <$> mapM (\ci -> ciComposeMsgReq ct ci <$$> prepareMsgReq ci) items
           where
-            ciComposeMsgReq :: Contact -> CChatItem 'CTDirect -> (MsgContent, Maybe CryptoFile) -> ComposeMessageReq
+            ciComposeMsgReq :: Contact -> CChatItem 'CTDirect -> (MsgContent, Maybe CryptoFile) -> ComposedMessageReq
             ciComposeMsgReq ct (CChatItem md ci) (mc', file) =
               let itemId = chatItemId' ci
                   ciff = forwardCIFF ci $ Just (CIFFContact (forwardName ct) (toMsgDirection md) (Just fromChatId) (Just itemId))
-               in (ComposedMessage file Nothing mc', ciff)
+               in (composedMessage file mc', ciff, msgContentTexts mc')
               where
                 forwardName :: Contact -> ContactName
                 forwardName Contact {profile = LocalProfile {displayName, localAlias}}
                   | localAlias /= "" = localAlias
                   | otherwise = displayName
         CTGroup -> withGroupLock "forwardChatItem, from group" fromChatId $ do
+          -- TODO [mentions] forward to the same group should retain mentions, and shouldn't read them again
+          -- update names?
           (gInfo, items) <- getCommandGroupChatItems user fromChatId itemIds
           catMaybes <$> mapM (\ci -> ciComposeMsgReq gInfo ci <$$> prepareMsgReq ci) items
           where
-            ciComposeMsgReq :: GroupInfo -> CChatItem 'CTGroup -> (MsgContent, Maybe CryptoFile) -> ComposeMessageReq
+            ciComposeMsgReq :: GroupInfo -> CChatItem 'CTGroup -> (MsgContent, Maybe CryptoFile) -> ComposedMessageReq
             ciComposeMsgReq gInfo (CChatItem md ci) (mc', file) = do
               let itemId = chatItemId' ci
                   ciff = forwardCIFF ci $ Just (CIFFGroup (forwardName gInfo) (toMsgDirection md) (Just fromChatId) (Just itemId))
-               in (ComposedMessage file Nothing mc', ciff)
+               in (composedMessage file mc', ciff, msgContentTexts mc')
               where
                 forwardName :: GroupInfo -> ContactName
                 forwardName GroupInfo {groupProfile = GroupProfile {displayName}} = displayName
@@ -881,10 +889,10 @@ processChatCommand' vr = \case
           (_, items) <- getCommandLocalChatItems user fromChatId itemIds
           catMaybes <$> mapM (\ci -> ciComposeMsgReq ci <$$> prepareMsgReq ci) items
           where
-            ciComposeMsgReq :: CChatItem 'CTLocal -> (MsgContent, Maybe CryptoFile) -> ComposeMessageReq
+            ciComposeMsgReq :: CChatItem 'CTLocal -> (MsgContent, Maybe CryptoFile) -> ComposedMessageReq
             ciComposeMsgReq (CChatItem _ ci) (mc', file) =
               let ciff = forwardCIFF ci Nothing
-               in (ComposedMessage file Nothing mc', ciff)
+               in (composedMessage file mc', ciff, msgContentTexts mc')
         CTContactRequest -> throwChatError $ CECommandError "not supported"
         CTContactConnection -> throwChatError $ CECommandError "not supported"
         where
@@ -1288,7 +1296,6 @@ processChatCommand' vr = \case
         liftIO $ setGroupUIThemes db user g uiThemes
       ok user
     _ -> pure $ chatCmdError (Just user) "not supported"
-  APIParseMarkdown text -> pure . CRApiParsedMarkdown $ parseMaybeMarkdownList text
   APIGetNtfToken -> withUser' $ \_ -> crNtfToken <$> withAgent getNtfToken
   APIRegisterToken token mode -> withUser $ \_ ->
     CRNtfTokenStatus <$> withAgent (\a -> registerNtfToken a token mode)
@@ -1844,7 +1851,7 @@ processChatCommand' vr = \case
         withFastStore' (\db -> runExceptT $ getContactIdByName db user name) >>= \case
           Right ctId -> do
             let chatRef = ChatRef CTDirect ctId
-            processChatCommand $ APISendMessages chatRef False Nothing (ComposedMessage Nothing Nothing mc :| [])
+            processChatCommand $ APISendMessages chatRef False Nothing [composedMessage Nothing mc]
           Left _ ->
             withFastStore' (\db -> runExceptT $ getActiveMembersByName db vr user name) >>= \case
               Right [(gInfo, member)] -> do
@@ -1856,13 +1863,15 @@ processChatCommand' vr = \case
               _ ->
                 throwChatError $ CEContactNotFound name Nothing
       CTGroup -> do
-        gId <- withFastStore $ \db -> getGroupIdByName db user name
+        (gId, mentions) <- withFastStore $ \db -> do
+          gId <- getGroupIdByName db user name
+          (gId,) <$> liftIO (getMessageMentions db user gId msg)
         let chatRef = ChatRef CTGroup gId
-        processChatCommand $ APISendMessages chatRef False Nothing (ComposedMessage Nothing Nothing mc :| [])
+        processChatCommand $ APISendMessages chatRef False Nothing [ComposedMessage Nothing Nothing mc mentions]
       CTLocal
         | name == "" -> do
             folderId <- withFastStore (`getUserNoteFolderId` user)
-            processChatCommand $ APICreateChatItems folderId (ComposedMessage Nothing Nothing mc :| [])
+            processChatCommand $ APICreateChatItems folderId [composedMessage Nothing mc]
         | otherwise -> throwChatError $ CECommandError "not supported"
       _ -> throwChatError $ CECommandError "not supported"
   SendMemberContactMessage gName mName msg -> withUser $ \user -> do
@@ -1881,11 +1890,11 @@ processChatCommand' vr = \case
           cr -> pure cr
       Just ctId -> do
         let chatRef = ChatRef CTDirect ctId
-        processChatCommand $ APISendMessages chatRef False Nothing (ComposedMessage Nothing Nothing mc :| [])
+        processChatCommand $ APISendMessages chatRef False Nothing [composedMessage Nothing mc]
   SendLiveMessage chatName msg -> withUser $ \user -> do
-    chatRef <- getChatRef user chatName
+    (chatRef, mentions) <- getChatRefAndMentions user chatName msg
     let mc = MCText msg
-    processChatCommand $ APISendMessages chatRef True Nothing (ComposedMessage Nothing Nothing mc :| [])
+    processChatCommand $ APISendMessages chatRef True Nothing [ComposedMessage Nothing Nothing mc mentions]
   SendMessageBroadcast msg -> withUser $ \user -> do
     contacts <- withFastStore' $ \db -> getUserContacts db vr user
     withChatLock "sendMessageBroadcast" . procCmd $ do
@@ -1926,7 +1935,7 @@ processChatCommand' vr = \case
     contactId <- withFastStore $ \db -> getContactIdByName db user cName
     quotedItemId <- withFastStore $ \db -> getDirectChatItemIdByText db userId contactId msgDir quotedMsg
     let mc = MCText msg
-    processChatCommand $ APISendMessages (ChatRef CTDirect contactId) False Nothing (ComposedMessage Nothing (Just quotedItemId) mc :| [])
+    processChatCommand $ APISendMessages (ChatRef CTDirect contactId) False Nothing [ComposedMessage Nothing (Just quotedItemId) mc M.empty]
   DeleteMessage chatName deletedMsg -> withUser $ \user -> do
     chatRef <- getChatRef user chatName
     deletedItemId <- getSentChatItemIdByText user chatRef deletedMsg
@@ -1936,14 +1945,14 @@ processChatCommand' vr = \case
     deletedItemId <- withFastStore $ \db -> getGroupChatItemIdByText db user gId (Just mName) deletedMsg
     processChatCommand $ APIDeleteMemberChatItem gId (deletedItemId :| [])
   EditMessage chatName editedMsg msg -> withUser $ \user -> do
-    chatRef <- getChatRef user chatName
+    (chatRef, mentions) <- getChatRefAndMentions user chatName msg
     editedItemId <- getSentChatItemIdByText user chatRef editedMsg
     let mc = MCText msg
-    processChatCommand $ APIUpdateChatItem chatRef editedItemId False mc
+    processChatCommand $ APIUpdateChatItem chatRef editedItemId False $ UpdatedMessage mc mentions
   UpdateLiveMessage chatName chatItemId live msg -> withUser $ \user -> do
-    chatRef <- getChatRef user chatName
+    (chatRef, mentions) <- getChatRefAndMentions user chatName msg
     let mc = MCText msg
-    processChatCommand $ APIUpdateChatItem chatRef chatItemId live mc
+    processChatCommand $ APIUpdateChatItem chatRef chatItemId live $ UpdatedMessage mc mentions
   ReactToMessage add reaction chatName msg -> withUser $ \user -> do
     chatRef <- getChatRef user chatName
     chatItemId <- getChatItemIdByText user chatRef msg
@@ -2213,10 +2222,13 @@ processChatCommand' vr = \case
     groupId <- withFastStore $ \db -> getGroupIdByName db user gName
     processChatCommand $ APIGetGroupLink groupId
   SendGroupMessageQuote gName cName quotedMsg msg -> withUser $ \user -> do
-    groupId <- withFastStore $ \db -> getGroupIdByName db user gName
-    quotedItemId <- withFastStore $ \db -> getGroupChatItemIdByText db user groupId cName quotedMsg
+    (groupId, quotedItemId, mentions) <-
+      withFastStore $ \db -> do
+        gId <- getGroupIdByName db user gName
+        qiId <- getGroupChatItemIdByText db user gId cName quotedMsg
+        (gId, qiId,) <$> liftIO (getMessageMentions db user gId msg)
     let mc = MCText msg
-    processChatCommand $ APISendMessages (ChatRef CTGroup groupId) False Nothing (ComposedMessage Nothing (Just quotedItemId) mc :| [])
+    processChatCommand $ APISendMessages (ChatRef CTGroup groupId) False Nothing [ComposedMessage Nothing (Just quotedItemId) mc mentions]
   ClearNoteFolder -> withUser $ \user -> do
     folderId <- withFastStore (`getUserNoteFolderId` user)
     processChatCommand $ APIClearChat (ChatRef CTLocal folderId)
@@ -2256,8 +2268,8 @@ processChatCommand' vr = \case
   SendFile chatName f -> withUser $ \user -> do
     chatRef <- getChatRef user chatName
     case chatRef of
-      ChatRef CTLocal folderId -> processChatCommand $ APICreateChatItems folderId (ComposedMessage (Just f) Nothing (MCFile "") :| [])
-      _ -> processChatCommand $ APISendMessages chatRef False Nothing (ComposedMessage (Just f) Nothing (MCFile "") :| [])
+      ChatRef CTLocal folderId -> processChatCommand $ APICreateChatItems folderId [composedMessage (Just f) (MCFile "")]
+      _ -> processChatCommand $ APISendMessages chatRef False Nothing [composedMessage (Just f) (MCFile "")]
   SendImage chatName f@(CryptoFile fPath _) -> withUser $ \user -> do
     chatRef <- getChatRef user chatName
     filePath <- lift $ toFSFilePath fPath
@@ -2265,7 +2277,7 @@ processChatCommand' vr = \case
     fileSize <- getFileSize filePath
     unless (fileSize <= maxImageSize) $ throwChatError CEFileImageSize {filePath}
     -- TODO include file description for preview
-    processChatCommand $ APISendMessages chatRef False Nothing (ComposedMessage (Just f) Nothing (MCImage "" fixedImagePreview) :| [])
+    processChatCommand $ APISendMessages chatRef False Nothing [composedMessage (Just f) (MCImage "" fixedImagePreview)]
   ForwardFile chatName fileId -> forwardFile chatName fileId SendFile
   ForwardImage chatName fileId -> forwardFile chatName fileId SendImage
   SendFileDescription _chatName _f -> pure $ chatCmdError Nothing "TODO"
@@ -2486,6 +2498,12 @@ processChatCommand' vr = \case
           | name == "" -> withFastStore (`getUserNoteFolderId` user)
           | otherwise -> throwChatError $ CECommandError "not supported"
         _ -> throwChatError $ CECommandError "not supported"
+    getChatRefAndMentions :: User -> ChatName -> Text -> CM (ChatRef, Map MemberName GroupMemberId)
+    getChatRefAndMentions user cName msg = do
+      chatRef@(ChatRef cType chatId) <- getChatRef user cName
+      (chatRef,) <$> case cType of
+        CTGroup -> withFastStore' $ \db -> getMessageMentions db user chatId msg
+        _ -> pure []
 #if !defined(dbPostgres)
     checkChatStopped :: CM ChatResponse -> CM ChatResponse
     checkChatStopped a = asks agentAsync >>= readTVarIO >>= maybe a (const $ throwChatError CEChatNotStopped)
@@ -2935,12 +2953,13 @@ processChatCommand' vr = \case
         cReqHashes :: (ConnReqUriHash, ConnReqUriHash)
         cReqHashes = bimap hash hash cReqSchemas
         hash = ConnReqUriHash . C.sha256Hash . strEncode
+    updateCIGroupInvitationStatus :: User -> GroupInfo -> CIGroupInvitationStatus -> CM ()
     updateCIGroupInvitationStatus user GroupInfo {groupId} newStatus = do
       AChatItem _ _ cInfo ChatItem {content, meta = CIMeta {itemId}} <- withFastStore $ \db -> getChatItemByGroupId db vr user groupId
       case (cInfo, content) of
         (DirectChat ct@Contact {contactId}, CIRcvGroupInvitation ciGroupInv@CIGroupInvitation {status} memRole)
           | status == CIGISPending -> do
-              let aciContent = ACIContent SMDRcv $ CIRcvGroupInvitation ciGroupInv {status = newStatus} memRole
+              let aciContent = ACIContent SMDRcv $ CIRcvGroupInvitation (ciGroupInv {status = newStatus} :: CIGroupInvitation) memRole
               timed_ <- contactCITimed ct
               updateDirectChatItemView user ct itemId aciContent False False timed_ Nothing
               forM_ (timed_ >>= timedDeleteAt') $
@@ -2951,8 +2970,12 @@ processChatCommand' vr = \case
       MCReport {} -> throwChatError $ CECommandError "sending reports via this API is not supported"
       _ -> pure ()
     assertAllowedContent' :: ComposedMessage -> CM ()
-    assertAllowedContent' ComposedMessage {msgContent} = assertAllowedContent msgContent        
-    sendContactContentMessages :: User -> ContactId -> Bool -> Maybe Int -> NonEmpty ComposeMessageReq -> CM ChatResponse
+    assertAllowedContent' ComposedMessage {msgContent} = assertAllowedContent msgContent
+    assertNoMentions :: ComposedMessage -> CM ()
+    assertNoMentions ComposedMessage {mentions}
+      | null mentions = pure ()
+      | otherwise = throwChatError $ CECommandError "mentions are not supported in this chat"
+    sendContactContentMessages :: User -> ContactId -> Bool -> Maybe Int -> NonEmpty ComposedMessageReq -> CM ChatResponse
     sendContactContentMessages user contactId live itemTTL cmrs = do
       assertMultiSendable live cmrs
       ct@Contact {contactUsed} <- withFastStore $ \db -> getContact db vr user contactId
@@ -2963,15 +2986,15 @@ processChatCommand' vr = \case
       where
         assertVoiceAllowed :: Contact -> CM ()
         assertVoiceAllowed ct =
-          when (not (featureAllowed SCFVoice forUser ct) && any (\(ComposedMessage {msgContent}, _) -> isVoice msgContent) cmrs) $
+          when (not (featureAllowed SCFVoice forUser ct) && any (\(ComposedMessage {msgContent}, _, _) -> isVoice msgContent) cmrs) $
             throwChatError (CECommandError $ "feature not allowed " <> T.unpack (chatFeatureNameText CFVoice))
         processComposedMessages :: Contact -> CM ChatResponse
         processComposedMessages ct = do
           (fInvs_, ciFiles_) <- L.unzip <$> setupSndFileTransfers
           timed_ <- sndContactCITimed live ct itemTTL
-          (msgContainers, quotedItems_) <- L.unzip <$> prepareMsgs (L.zip cmrs fInvs_) timed_
+          (msgContainers, quotedItems_, mms) <- neUnzip3 <$> prepareMsgs (L.zip cmrs fInvs_) timed_
           msgs_ <- sendDirectContactMessages user ct $ L.map XMsgNew msgContainers
-          let itemsData = prepareSndItemsData msgs_ cmrs ciFiles_ quotedItems_
+          let itemsData = prepareSndItemsData (L.toList cmrs) (L.toList mms) (L.toList ciFiles_) (L.toList quotedItems_) msgs_
           when (length itemsData /= length cmrs) $ logError "sendContactContentMessages: cmrs and itemsData length mismatch"
           r@(_, cis) <- partitionEithers <$> saveSndChatItems user (CDDirectSnd ct) itemsData timed_ live
           processSendErrs user r
@@ -2982,39 +3005,40 @@ processChatCommand' vr = \case
           where
             setupSndFileTransfers :: CM (NonEmpty (Maybe FileInvitation, Maybe (CIFile 'MDSnd)))
             setupSndFileTransfers =
-              forM cmrs $ \(ComposedMessage {fileSource = file_}, _) -> case file_ of
+              forM cmrs $ \(ComposedMessage {fileSource = file_}, _, _) -> case file_ of
                 Just file -> do
                   fileSize <- checkSndFile file
                   (fInv, ciFile) <- xftpSndFileTransfer user file fileSize 1 $ CGContact ct
                   pure (Just fInv, Just ciFile)
                 Nothing -> pure (Nothing, Nothing)
-            prepareMsgs :: NonEmpty (ComposeMessageReq, Maybe FileInvitation) -> Maybe CITimed -> CM (NonEmpty (MsgContainer, Maybe (CIQuote 'CTDirect)))
-            prepareMsgs cmsFileInvs timed_ =
-              forM cmsFileInvs $ \((ComposedMessage {quotedItemId, msgContent = mc}, itemForwarded), fInv_) ->
+            prepareMsgs :: NonEmpty (ComposedMessageReq, Maybe FileInvitation) -> Maybe CITimed -> CM (NonEmpty (MsgContainer, Maybe (CIQuote 'CTDirect), (Map MemberName MentionedMember, Map MemberName MemberMention)))
+            prepareMsgs cmsFileInvs timed_ = withFastStore $ \db ->
+              forM cmsFileInvs $ \((ComposedMessage {quotedItemId, msgContent = mc}, itemForwarded, _), fInv_) -> do
+                let mms = (M.empty, M.empty)
                 case (quotedItemId, itemForwarded) of
-                  (Nothing, Nothing) -> pure (MCSimple (ExtMsgContent mc fInv_ (ttl' <$> timed_) (justTrue live)), Nothing)
-                  (Nothing, Just _) -> pure (MCForward (ExtMsgContent mc fInv_ (ttl' <$> timed_) (justTrue live)), Nothing)
+                  (Nothing, Nothing) -> pure (MCSimple (ExtMsgContent mc M.empty fInv_ (ttl' <$> timed_) (justTrue live)), Nothing, mms)
+                  (Nothing, Just _) -> pure (MCForward (ExtMsgContent mc M.empty fInv_ (ttl' <$> timed_) (justTrue live)), Nothing, mms)
                   (Just qiId, Nothing) -> do
                     CChatItem _ qci@ChatItem {meta = CIMeta {itemTs, itemSharedMsgId}, formattedText, file} <-
-                      withFastStore $ \db -> getDirectChatItem db user contactId qiId
+                      getDirectChatItem db user contactId qiId
                     (origQmc, qd, sent) <- quoteData qci
                     let msgRef = MsgRef {msgId = itemSharedMsgId, sentAt = itemTs, sent, memberId = Nothing}
                         qmc = quoteContent mc origQmc file
                         quotedItem = CIQuote {chatDir = qd, itemId = Just qiId, sharedMsgId = itemSharedMsgId, sentAt = itemTs, content = qmc, formattedText}
-                    pure (MCQuote QuotedMsg {msgRef, content = qmc} (ExtMsgContent mc fInv_ (ttl' <$> timed_) (justTrue live)), Just quotedItem)
-                  (Just _, Just _) -> throwChatError CEInvalidQuote
+                    pure (MCQuote QuotedMsg {msgRef, content = qmc} (ExtMsgContent mc M.empty fInv_ (ttl' <$> timed_) (justTrue live)), Just quotedItem, mms)
+                  (Just _, Just _) -> throwError SEInvalidQuote
               where
-                quoteData :: ChatItem c d -> CM (MsgContent, CIQDirection 'CTDirect, Bool)
-                quoteData ChatItem {meta = CIMeta {itemDeleted = Just _}} = throwChatError CEInvalidQuote
+                quoteData :: ChatItem c d -> ExceptT StoreError IO (MsgContent, CIQDirection 'CTDirect, Bool)
+                quoteData ChatItem {meta = CIMeta {itemDeleted = Just _}} = throwError SEInvalidQuote
                 quoteData ChatItem {content = CISndMsgContent qmc} = pure (qmc, CIQDirectSnd, True)
                 quoteData ChatItem {content = CIRcvMsgContent qmc} = pure (qmc, CIQDirectRcv, False)
-                quoteData _ = throwChatError CEInvalidQuote
-    sendGroupContentMessages :: User -> GroupId -> Bool -> Maybe Int -> NonEmpty ComposeMessageReq -> CM ChatResponse
+                quoteData _ = throwError SEInvalidQuote
+    sendGroupContentMessages :: User -> GroupId -> Bool -> Maybe Int -> NonEmpty ComposedMessageReq -> CM ChatResponse
     sendGroupContentMessages user groupId live itemTTL cmrs = do
       assertMultiSendable live cmrs
       Group gInfo ms <- withFastStore $ \db -> getGroup db vr user groupId
       sendGroupContentMessages_ user gInfo ms live itemTTL cmrs
-    sendGroupContentMessages_ :: User -> GroupInfo -> [GroupMember] -> Bool -> Maybe Int -> NonEmpty ComposeMessageReq -> CM ChatResponse
+    sendGroupContentMessages_ :: User -> GroupInfo -> [GroupMember] -> Bool -> Maybe Int -> NonEmpty ComposedMessageReq -> CM ChatResponse
     sendGroupContentMessages_ user gInfo@GroupInfo {groupId, membership} ms live itemTTL cmrs = do
       assertUserGroupRole gInfo GRAuthor
       assertGroupContentAllowed
@@ -3026,18 +3050,18 @@ processChatCommand' vr = \case
             Just f -> throwChatError (CECommandError $ "feature not allowed " <> T.unpack (groupFeatureNameText f))
             Nothing -> pure ()
           where
-            findProhibited :: [ComposeMessageReq] -> Maybe GroupFeature
+            findProhibited :: [ComposedMessageReq] -> Maybe GroupFeature
             findProhibited =
               foldr'
-                (\(ComposedMessage {fileSource, msgContent = mc}, _) acc -> prohibitedGroupContent gInfo membership mc fileSource <|> acc)
+                (\(ComposedMessage {fileSource, msgContent = mc}, _, (_, ft)) acc -> prohibitedGroupContent gInfo membership mc ft fileSource <|> acc)
                 Nothing
         processComposedMessages :: CM ChatResponse
         processComposedMessages = do
           (fInvs_, ciFiles_) <- L.unzip <$> setupSndFileTransfers (length $ filter memberCurrent ms)
           timed_ <- sndGroupCITimed live gInfo itemTTL
-          (msgContainers, quotedItems_) <- L.unzip <$> prepareMsgs (L.zip cmrs fInvs_) timed_
+          (msgContainers, quotedItems_, mms) <- neUnzip3 <$> prepareMsgs (L.zip cmrs fInvs_) timed_
           (msgs_, gsr) <- sendGroupMessages user gInfo ms $ L.map XMsgNew msgContainers
-          let itemsData = prepareSndItemsData (L.toList msgs_) cmrs ciFiles_ quotedItems_
+          let itemsData = prepareSndItemsData (L.toList cmrs) (L.toList mms) (L.toList ciFiles_) (L.toList quotedItems_) (L.toList msgs_)
           cis_ <- saveSndChatItems user (CDGroupSnd gInfo) itemsData timed_ live
           when (length itemsData /= length cmrs) $ logError "sendGroupContentMessages: cmrs and cis_ length mismatch"
           createMemberSndStatuses cis_ msgs_ gsr
@@ -3050,16 +3074,16 @@ processChatCommand' vr = \case
           where
             setupSndFileTransfers :: Int -> CM (NonEmpty (Maybe FileInvitation, Maybe (CIFile 'MDSnd)))
             setupSndFileTransfers n =
-              forM cmrs $ \(ComposedMessage {fileSource = file_}, _) -> case file_ of
+              forM cmrs $ \(ComposedMessage {fileSource = file_}, _, _) -> case file_ of
                 Just file -> do
                   fileSize <- checkSndFile file
                   (fInv, ciFile) <- xftpSndFileTransfer user file fileSize n $ CGGroup gInfo ms
                   pure (Just fInv, Just ciFile)
                 Nothing -> pure (Nothing, Nothing)
-            prepareMsgs :: NonEmpty (ComposeMessageReq, Maybe FileInvitation) -> Maybe CITimed -> CM (NonEmpty (MsgContainer, Maybe (CIQuote 'CTGroup)))
-            prepareMsgs cmsFileInvs timed_ =
-              forM cmsFileInvs $ \((ComposedMessage {quotedItemId, msgContent = mc}, itemForwarded), fInv_) ->
-                prepareGroupMsg user gInfo mc quotedItemId itemForwarded fInv_ timed_ live
+            prepareMsgs :: NonEmpty (ComposedMessageReq, Maybe FileInvitation) -> Maybe CITimed -> CM (NonEmpty (MsgContainer, Maybe (CIQuote 'CTGroup), (Map MemberName MentionedMember, Map MemberName MemberMention)))
+            prepareMsgs cmsFileInvs timed_ = withFastStore $ \db ->
+              forM cmsFileInvs $ \((ComposedMessage {quotedItemId, msgContent = mc, mentions}, itemForwarded, (_, ft_)), fInv_) ->
+                prepareGroupMsg db user gInfo mc ft_ mentions quotedItemId itemForwarded fInv_ timed_ live
             createMemberSndStatuses ::
               [Either ChatError (ChatItem 'CTGroup 'MDSnd)] ->
               NonEmpty (Either ChatError SndMessage) ->
@@ -3095,7 +3119,7 @@ processChatCommand' vr = \case
                         Right _ -> GSSInactive
                         Left e -> GSSError $ SndErrOther $ tshow e
                   forM_ ciId_ $ \ciId -> createGroupSndStatus db ciId mId status
-    assertMultiSendable :: Bool -> NonEmpty ComposeMessageReq -> CM ()
+    assertMultiSendable :: Bool -> NonEmpty ComposedMessageReq -> CM ()
     assertMultiSendable live cmrs
       | length cmrs == 1 = pure ()
       | otherwise =
@@ -3103,7 +3127,7 @@ processChatCommand' vr = \case
           -- This is to support case of sending multiple attachments while also quoting another message.
           -- UI doesn't allow composing with multiple quotes, so api prohibits it as well, and doesn't bother
           -- batching retrieval of quoted messages (prepareMsgs).
-          when (live || length (L.filter (\(ComposedMessage {quotedItemId}, _) -> isJust quotedItemId) cmrs) > 1) $
+          when (live || length (L.filter (\(ComposedMessage {quotedItemId}, _, _) -> isJust quotedItemId) cmrs) > 1) $
             throwChatError (CECommandError "invalid multi send: live and more than one quote not supported")
     xftpSndFileTransfer :: User -> CryptoFile -> Integer -> Int -> ContactOrGroup -> CM (FileInvitation, CIFile 'MDSnd)
     xftpSndFileTransfer user file fileSize n contactOrGroup = do
@@ -3121,19 +3145,16 @@ processChatCommand' vr = \case
             saveMemberFD _ = pure ()
       pure (fInv, ciFile)
     prepareSndItemsData ::
+      [ComposedMessageReq] ->
+      [(Map MemberName MentionedMember, Map MemberName MemberMention)] ->
+      [Maybe (CIFile 'MDSnd)] ->
+      [Maybe (CIQuote c)] ->
       [Either ChatError SndMessage] ->
-      NonEmpty ComposeMessageReq ->
-      NonEmpty (Maybe (CIFile 'MDSnd)) ->
-      NonEmpty (Maybe (CIQuote c)) ->
       [Either ChatError (NewSndChatItemData c)]
-    prepareSndItemsData msgs_ cmrs' ciFiles_ quotedItems_ =
-      [ ( case msg_ of
-            Right msg -> Right $ NewSndChatItemData msg (CISndMsgContent msgContent) f q itemForwarded
-            Left e -> Left e -- step over original error
-        )
-        | (msg_, (ComposedMessage {msgContent}, itemForwarded), f, q) <-
-            zipWith4 (,,,) msgs_ (L.toList cmrs') (L.toList ciFiles_) (L.toList quotedItems_)
-      ]
+    prepareSndItemsData =
+      zipWith5 $ \(ComposedMessage {msgContent}, itemForwarded, ts) mm f q -> \case
+        Right msg -> Right $ NewSndChatItemData msg (CISndMsgContent msgContent) ts mm f q itemForwarded
+        Left e -> Left e -- step over original error
     processSendErrs :: User -> ([ChatError], [ChatItem c d]) -> CM ()
     processSendErrs user = \case
       -- no errors
@@ -3178,7 +3199,7 @@ processChatCommand' vr = \case
     forwardMsgContent ChatItem {content = CISndMsgContent fmc} = pure $ Just fmc
     forwardMsgContent ChatItem {content = CIRcvMsgContent fmc} = pure $ Just fmc
     forwardMsgContent _ = throwChatError CEInvalidForward
-    createNoteFolderContentItems :: User -> NoteFolderId -> NonEmpty ComposeMessageReq -> CM ChatResponse
+    createNoteFolderContentItems :: User -> NoteFolderId -> NonEmpty ComposedMessageReq -> CM ChatResponse
     createNoteFolderContentItems user folderId cmrs = do
       assertNoQuotes
       nf <- withFastStore $ \db -> getNoteFolder db user folderId
@@ -3190,11 +3211,11 @@ processChatCommand' vr = \case
       where
         assertNoQuotes :: CM ()
         assertNoQuotes =
-          when (any (\(ComposedMessage {quotedItemId}, _) -> isJust quotedItemId) cmrs) $
+          when (any (\(ComposedMessage {quotedItemId}, _, _) -> isJust quotedItemId) cmrs) $
             throwChatError (CECommandError "createNoteFolderContentItems: quotes not supported")
         createLocalFiles :: NoteFolder -> UTCTime -> CM (NonEmpty (Maybe (CIFile 'MDSnd)))
         createLocalFiles nf createdAt =
-          forM cmrs $ \(ComposedMessage {fileSource = file_}, _) ->
+          forM cmrs $ \(ComposedMessage {fileSource = file_}, _, _) ->
             forM file_ $ \cf@CryptoFile {filePath, cryptoArgs} -> do
               fsFilePath <- lift $ toFSFilePath filePath
               fileSize <- liftIO $ CF.getFileContentsSize $ CryptoFile fsFilePath cryptoArgs
@@ -3203,13 +3224,12 @@ processChatCommand' vr = \case
                 fileId <- createLocalFile CIFSSndStored db user nf createdAt cf fileSize chunkSize
                 pure CIFile {fileId, fileName = takeFileName filePath, fileSize, fileSource = Just cf, fileStatus = CIFSSndStored, fileProtocol = FPLocal}
         prepareLocalItemsData ::
-          NonEmpty ComposeMessageReq ->
+          NonEmpty ComposedMessageReq ->
           NonEmpty (Maybe (CIFile 'MDSnd)) ->
-          [(CIContent 'MDSnd, Maybe (CIFile 'MDSnd), Maybe CIForwardedFrom)]
-        prepareLocalItemsData cmrs' ciFiles_ =
-          [ (CISndMsgContent mc, f, itemForwarded)
-            | ((ComposedMessage {msgContent = mc}, itemForwarded), f) <- zip (L.toList cmrs') (L.toList ciFiles_)
-          ]
+          NonEmpty (CIContent 'MDSnd, Maybe (CIFile 'MDSnd), Maybe CIForwardedFrom, (Text, Maybe MarkdownList))
+        prepareLocalItemsData =
+          L.zipWith $ \(ComposedMessage {msgContent = mc}, itemForwarded, ts) f ->
+            (CISndMsgContent mc, f, itemForwarded, ts)
     getConnQueueInfo user Connection {connId, agentConnId = AgentConnId acId} = do
       msgInfo <- withFastStore' (`getLastRcvMsgInfo` connId)
       CRQueueInfo user msgInfo <$> withAgent (`getConnectionQueueInfo` acId)
@@ -3231,7 +3251,13 @@ updatedServers p' srvs UserOperatorServers {operator, smpServers, xftpServers} =
     disableSrv srv@UserServer {preset} =
       AUS SDBStored $ if preset then srv {enabled = False} else srv {deleted = True}
 
-type ComposeMessageReq = (ComposedMessage, Maybe CIForwardedFrom)
+type ComposedMessageReq = (ComposedMessage, Maybe CIForwardedFrom, (Text, Maybe MarkdownList))
+
+composedMessage :: Maybe CryptoFile -> MsgContent -> ComposedMessage
+composedMessage f mc = ComposedMessage {fileSource = f, quotedItemId = Nothing, msgContent = mc, mentions = M.empty}
+
+composedMessageReq :: ComposedMessage -> ComposedMessageReq
+composedMessageReq cm@ComposedMessage {msgContent = mc} = (cm, Nothing, msgContentTexts mc)
 
 data ChangedProfileContact = ChangedProfileContact
   { ct :: Contact,
@@ -3692,7 +3718,7 @@ chatCommandP =
       "/_create *" *> (APICreateChatItems <$> A.decimal <*> (" json " *> jsonP <|> " text " *> composedMessagesTextP)),
       "/_report #" *> (APIReportMessage <$> A.decimal <* A.space <*> A.decimal <*> (" reason=" *> strP) <*> (A.space *> textP <|> pure "")),
       "/report #" *> (ReportMessage <$> displayNameP <*> optional (" @" *> displayNameP) <*> _strP <* A.space <*> msgTextP),
-      "/_update item " *> (APIUpdateChatItem <$> chatRefP <* A.space <*> A.decimal <*> liveMessageP <* A.space <*> msgContentP),
+      "/_update item " *> (APIUpdateChatItem <$> chatRefP <* A.space <*> A.decimal <*> liveMessageP <*> (" json" *> jsonP <|> " text " *> updatedMessagesTextP)),
       "/_delete item " *> (APIDeleteChatItem <$> chatRefP <*> _strP <*> _strP),
       "/_delete member item #" *> (APIDeleteMemberChatItem <$> A.decimal <*> _strP),
       "/_reaction " *> (APIChatItemReaction <$> chatRefP <* A.space <*> A.decimal <* A.space <*> onOffP <* A.space <*> jsonP),
@@ -3725,7 +3751,6 @@ chatCommandP =
       "/_set prefs @" *> (APISetContactPrefs <$> A.decimal <* A.space <*> jsonP),
       "/_set theme user " *> (APISetUserUIThemes <$> A.decimal <*> optional (A.space *> jsonP)),
       "/_set theme " *> (APISetChatUIThemes <$> chatRefP <*> optional (A.space *> jsonP)),
-      "/_parse " *> (APIParseMarkdown . safeDecodeUtf8 <$> A.takeByteString),
       "/_ntf get" $> APIGetNtfToken,
       "/_ntf register " *> (APIRegisterToken <$> strP_ <*> strP),
       "/_ntf verify " *> (APIVerifyToken <$> strP <* A.space <*> strP <* A.space <*> strP),
@@ -4003,7 +4028,8 @@ chatCommandP =
       c -> c
     composedMessagesTextP = do
       text <- mcTextP
-      pure $ (ComposedMessage Nothing Nothing text) :| []
+      pure [composedMessage Nothing text]
+    updatedMessagesTextP = (`UpdatedMessage` []) <$> mcTextP
     liveMessageP = " live=" *> onOffP <|> pure False
     sendMessageTTLP = " ttl=" *> ((Just <$> A.decimal) <|> ("default" $> Nothing)) <|> pure Nothing
     receiptSettings = do
@@ -4123,7 +4149,7 @@ displayNameP = safeDecodeUtf8 <$> (quoted '\'' <|> takeNameTill (\c -> isSpace c
       A.peekChar' >>= \c ->
         if refChar c then A.takeTill p else fail "invalid first character in display name"
     quoted c = A.char c *> takeNameTill (== c) <* A.char c
-    refChar c = c > ' ' && c /= '#' && c /= '@'
+    refChar c = c > ' ' && c /= '#' && c /= '@' && c /= '\''
 
 mkValidName :: String -> String
 mkValidName = reverse . dropWhile isSpace . fst3 . foldl' addChar ("", '\NUL', 0 :: Int)
diff --git a/src/Simplex/Chat/Library/Internal.hs b/src/Simplex/Chat/Library/Internal.hs
index 1bcbf9f20d..1c641d165c 100644
--- a/src/Simplex/Chat/Library/Internal.hs
+++ b/src/Simplex/Chat/Library/Internal.hs
@@ -29,6 +29,7 @@ import Crypto.Random (ChaChaDRG)
 import Data.Bifunctor (first)
 import Data.ByteString.Char8 (ByteString)
 import qualified Data.ByteString.Char8 as B
+import Data.Containers.ListUtils (nubOrd)
 import Data.Either (partitionEithers, rights)
 import Data.Fixed (div')
 import Data.Foldable (foldr')
@@ -102,6 +103,12 @@ import UnliftIO.STM
 maxMsgReactions :: Int
 maxMsgReactions = 3
 
+maxRcvMentions :: Int
+maxRcvMentions = 5
+
+maxSndMentions :: Int
+maxSndMentions = 3
+
 withChatLock :: String -> CM a -> CM a
 withChatLock name action = asks chatLock >>= \l -> withLock l name action
 
@@ -181,25 +188,76 @@ toggleNtf user m ntfOn =
     forM_ (memberConnId m) $ \connId ->
       withAgent (\a -> toggleConnectionNtfs a connId ntfOn) `catchChatError` (toView . CRChatError (Just user))
 
-prepareGroupMsg :: User -> GroupInfo -> MsgContent -> Maybe ChatItemId -> Maybe CIForwardedFrom -> Maybe FileInvitation -> Maybe CITimed -> Bool -> CM (MsgContainer, Maybe (CIQuote 'CTGroup))
-prepareGroupMsg user GroupInfo {groupId, membership} mc quotedItemId_ itemForwarded fInv_ timed_ live = case (quotedItemId_, itemForwarded) of
-  (Nothing, Nothing) -> pure (MCSimple (ExtMsgContent mc fInv_ (ttl' <$> timed_) (justTrue live)), Nothing)
-  (Nothing, Just _) -> pure (MCForward (ExtMsgContent mc fInv_ (ttl' <$> timed_) (justTrue live)), Nothing)
+prepareGroupMsg :: DB.Connection -> User -> GroupInfo -> MsgContent -> Maybe MarkdownList -> Map MemberName GroupMemberId -> Maybe ChatItemId -> Maybe CIForwardedFrom -> Maybe FileInvitation -> Maybe CITimed -> Bool -> ExceptT StoreError IO (MsgContainer, Maybe (CIQuote 'CTGroup), (Map MemberName MentionedMember, Map MemberName MemberMention))
+prepareGroupMsg db user g@GroupInfo {groupId, membership} mc ft_ memberMentions quotedItemId_ itemForwarded fInv_ timed_ live = case (quotedItemId_, itemForwarded) of
+  (Nothing, Nothing) -> do
+    mms@(_, mentions) <- getMentionedMembers db user g ft_ memberMentions
+    pure (MCSimple (ExtMsgContent mc mentions fInv_ (ttl' <$> timed_) (justTrue live)), Nothing, mms)
+  (Nothing, Just _) ->
+    pure (MCForward (ExtMsgContent mc M.empty fInv_ (ttl' <$> timed_) (justTrue live)), Nothing, (M.empty, M.empty))
   (Just quotedItemId, Nothing) -> do
+    mms@(_, mentions) <- getMentionedMembers db user g ft_ memberMentions
     CChatItem _ qci@ChatItem {meta = CIMeta {itemTs, itemSharedMsgId}, formattedText, file} <-
-      withStore $ \db -> getGroupChatItem db user groupId quotedItemId
+      getGroupChatItem db user groupId quotedItemId
     (origQmc, qd, sent, GroupMember {memberId}) <- quoteData qci membership
     let msgRef = MsgRef {msgId = itemSharedMsgId, sentAt = itemTs, sent, memberId = Just memberId}
         qmc = quoteContent mc origQmc file
         quotedItem = CIQuote {chatDir = qd, itemId = Just quotedItemId, sharedMsgId = itemSharedMsgId, sentAt = itemTs, content = qmc, formattedText}
-    pure (MCQuote QuotedMsg {msgRef, content = qmc} (ExtMsgContent mc fInv_ (ttl' <$> timed_) (justTrue live)), Just quotedItem)
-  (Just _, Just _) -> throwChatError CEInvalidQuote
+    pure (MCQuote QuotedMsg {msgRef, content = qmc} (ExtMsgContent mc mentions fInv_ (ttl' <$> timed_) (justTrue live)), Just quotedItem, mms)
+  (Just _, Just _) -> throwError SEInvalidQuote
   where
-    quoteData :: ChatItem c d -> GroupMember -> CM (MsgContent, CIQDirection 'CTGroup, Bool, GroupMember)
-    quoteData ChatItem {meta = CIMeta {itemDeleted = Just _}} _ = throwChatError CEInvalidQuote
+    quoteData :: ChatItem c d -> GroupMember -> ExceptT StoreError IO (MsgContent, CIQDirection 'CTGroup, Bool, GroupMember)
+    quoteData ChatItem {meta = CIMeta {itemDeleted = Just _}} _ = throwError SEInvalidQuote
     quoteData ChatItem {chatDir = CIGroupSnd, content = CISndMsgContent qmc} membership' = pure (qmc, CIQGroupSnd, True, membership')
     quoteData ChatItem {chatDir = CIGroupRcv m, content = CIRcvMsgContent qmc} _ = pure (qmc, CIQGroupRcv $ Just m, False, m)
-    quoteData _ _ = throwChatError CEInvalidQuote
+    quoteData _ _ = throwError SEInvalidQuote
+
+getMentionedMembers :: DB.Connection -> User -> GroupInfo -> Maybe MarkdownList -> Map MemberName GroupMemberId -> ExceptT StoreError IO (Map MemberName MentionedMember, Map MemberName MemberMention)
+getMentionedMembers db user GroupInfo {groupId} ft_ mentions = case ft_ of
+  Just ft | not (null mentions) -> do
+    let msgMentions = S.fromList $ mentionedNames ft
+        n = M.size mentions
+    -- prevent "invisible" and repeated-with-different-name mentions (when the same member is mentioned via another name)
+    unless (n <= maxSndMentions && all (`S.member` msgMentions) (M.keys mentions) && S.size (S.fromList $ M.elems mentions) == n) $
+      throwError SEInvalidMention
+    mentionedMembers <- mapM (getMentionedGroupMember db user groupId) mentions
+    let mentions' = M.map (\MentionedMember {memberId} -> MemberMention {memberId}) mentionedMembers
+    pure (mentionedMembers, mentions')
+  _ -> pure (M.empty, M.empty)
+
+getRcvMentionedMembers :: DB.Connection -> User -> GroupInfo -> Maybe MarkdownList -> Map MemberName MemberMention -> IO (Map MemberName MentionedMember)
+getRcvMentionedMembers db user GroupInfo {groupId} ft_ mentions = case ft_ of
+  Just ft | not (null mentions) ->
+    let mentions' = uniqueMsgMentions maxRcvMentions mentions $ mentionedNames ft
+     in mapM (getMentionedMemberByMemberId db user groupId) mentions'
+  _ -> pure M.empty
+
+-- prevent "invisible" and repeated-with-different-name mentions
+uniqueMsgMentions :: Int -> Map MemberName MemberMention -> [ContactName] -> Map MemberName MemberMention
+uniqueMsgMentions maxMentions mentions = go M.empty S.empty 0
+  where
+    go acc _ _ [] = acc
+    go acc seen n (name : rest)
+      | n >= maxMentions = acc
+      | otherwise = case M.lookup name mentions of
+          Just mm@MemberMention {memberId} | S.notMember memberId seen -> 
+            go (M.insert name mm acc) (S.insert memberId seen) (n + 1) rest
+          _ -> go acc seen n rest
+
+getMessageMentions :: DB.Connection -> User -> GroupId -> Text -> IO (Map MemberName GroupMemberId)
+getMessageMentions db user gId msg = case parseMaybeMarkdownList msg of
+  Just ft -> M.fromList . catMaybes <$> mapM get (nubOrd $ mentionedNames ft)
+  Nothing -> pure M.empty
+  where
+    get name =
+      fmap (name,) . eitherToMaybe
+        <$> runExceptT (getGroupMemberIdByName db user gId name)
+
+msgContentTexts :: MsgContent -> (Text, Maybe MarkdownList)
+msgContentTexts mc = let t = msgContentText mc in (t, parseMaybeMarkdownList t)
+
+ciContentTexts :: CIContent d -> (Text, Maybe MarkdownList)
+ciContentTexts content = let t = ciContentToText content in (t, parseMaybeMarkdownList t)
 
 quoteContent :: forall d. MsgContent -> MsgContent -> Maybe (CIFile d) -> MsgContent
 quoteContent mc qmc ciFile_
@@ -228,17 +286,17 @@ quoteContent mc qmc ciFile_
     qFileName = maybe qText (T.pack . getFileName) ciFile_
     qTextOrFile = if T.null qText then qFileName else qText
 
-prohibitedGroupContent :: GroupInfo -> GroupMember -> MsgContent -> Maybe f -> Maybe GroupFeature
-prohibitedGroupContent gInfo m mc file_
+prohibitedGroupContent :: GroupInfo -> GroupMember -> MsgContent -> Maybe MarkdownList -> Maybe f -> Maybe GroupFeature
+prohibitedGroupContent gInfo m mc ft file_
   | isVoice mc && not (groupFeatureMemberAllowed SGFVoice m gInfo) = Just GFVoice
   | not (isVoice mc) && isJust file_ && not (groupFeatureMemberAllowed SGFFiles m gInfo) = Just GFFiles
-  | prohibitedSimplexLinks gInfo m mc = Just GFSimplexLinks
+  | prohibitedSimplexLinks gInfo m ft = Just GFSimplexLinks
   | otherwise = Nothing
 
-prohibitedSimplexLinks :: GroupInfo -> GroupMember -> MsgContent -> Bool
-prohibitedSimplexLinks gInfo m mc =
+prohibitedSimplexLinks :: GroupInfo -> GroupMember -> Maybe MarkdownList -> Bool
+prohibitedSimplexLinks gInfo m ft =
   not (groupFeatureMemberAllowed SGFSimplexLinks m gInfo)
-    && maybe False (any ftIsSimplexLink) (parseMaybeMarkdownList $ msgContentText mc)
+    && maybe False (any ftIsSimplexLink) ft
   where
     ftIsSimplexLink :: FormattedText -> Bool
     ftIsSimplexLink FormattedText {format} = maybe False isSimplexLink format
@@ -863,9 +921,6 @@ startUpdatedTimedItemThread user chatRef ci ci' =
 metaBrokerTs :: MsgMeta -> UTCTime
 metaBrokerTs MsgMeta {broker = (_, brokerTs)} = brokerTs
 
-sameMemberId :: MemberId -> GroupMember -> Bool
-sameMemberId memId GroupMember {memberId} = memId == memberId
-
 createContactPQSndItem :: User -> Contact -> Connection -> PQEncryption -> CM (Contact, Connection)
 createContactPQSndItem user ct conn@Connection {pqSndEnabled} pqSndEnabled' =
   flip catchChatError (const $ pure (ct, conn)) $ case (pqSndEnabled, pqSndEnabled') of
@@ -1549,15 +1604,20 @@ saveGroupFwdRcvMsg user groupId forwardingMember refAuthorMember@GroupMember {me
 saveSndChatItem :: ChatTypeI c => User -> ChatDirection c 'MDSnd -> SndMessage -> CIContent 'MDSnd -> CM (ChatItem c 'MDSnd)
 saveSndChatItem user cd msg content = saveSndChatItem' user cd msg content Nothing Nothing Nothing Nothing False
 
+-- TODO [mentions] optimize by avoiding unnecesary parsing of control messages
 saveSndChatItem' :: ChatTypeI c => User -> ChatDirection c 'MDSnd -> SndMessage -> CIContent 'MDSnd -> Maybe (CIFile 'MDSnd) -> Maybe (CIQuote c) -> Maybe CIForwardedFrom -> Maybe CITimed -> Bool -> CM (ChatItem c 'MDSnd)
-saveSndChatItem' user cd msg content ciFile quotedItem itemForwarded itemTimed live =
-  saveSndChatItems user cd [Right NewSndChatItemData {msg, content, ciFile, quotedItem, itemForwarded}] itemTimed live >>= \case
+saveSndChatItem' user cd msg content ciFile quotedItem itemForwarded itemTimed live = do
+  let itemTexts = ciContentTexts content
+      itemMentions = (M.empty, M.empty)
+  saveSndChatItems user cd [Right NewSndChatItemData {msg, content, itemTexts, itemMentions, ciFile, quotedItem, itemForwarded}] itemTimed live >>= \case
     [Right ci] -> pure ci
     _ -> throwChatError $ CEInternalError "saveSndChatItem': expected 1 item"
 
 data NewSndChatItemData c = NewSndChatItemData
   { msg :: SndMessage,
     content :: CIContent 'MDSnd,
+    itemTexts :: (Text, Maybe MarkdownList),
+    itemMentions :: (Map MemberName MentionedMember, Map MemberName MemberMention),
     ciFile :: Maybe (CIFile 'MDSnd),
     quotedItem :: Maybe (CIQuote c),
     itemForwarded :: Maybe CIForwardedFrom
@@ -1579,31 +1639,57 @@ saveSndChatItems user cd itemsData itemTimed live = do
   lift $ withStoreBatch (\db -> map (bindRight $ createItem db createdAt) itemsData)
   where
     createItem :: DB.Connection -> UTCTime -> NewSndChatItemData c -> IO (Either ChatError (ChatItem c 'MDSnd))
-    createItem db createdAt NewSndChatItemData {msg = msg@SndMessage {sharedMsgId}, content, ciFile, quotedItem, itemForwarded} = do
+    createItem db createdAt NewSndChatItemData {msg = msg@SndMessage {sharedMsgId}, content, itemTexts, itemMentions, ciFile, quotedItem, itemForwarded} = do
       ciId <- createNewSndChatItem db user cd msg content quotedItem itemForwarded itemTimed live createdAt
       forM_ ciFile $ \CIFile {fileId} -> updateFileTransferChatItemId db fileId ciId createdAt
-      pure $ Right $ mkChatItem cd ciId content ciFile quotedItem (Just sharedMsgId) itemForwarded itemTimed live createdAt Nothing createdAt
+      let ci = mkChatItem_ cd ciId content itemTexts ciFile quotedItem (Just sharedMsgId) itemForwarded itemTimed live False createdAt Nothing createdAt
+          mentions = fst itemMentions
+      Right <$> case cd of
+        CDGroupSnd g | not (null mentions) -> createGroupCIMentions db g ci mentions
+        _ -> pure ci
 
-saveRcvChatItem :: (ChatTypeI c, ChatTypeQuotable c) => User -> ChatDirection c 'MDRcv -> RcvMessage -> UTCTime -> CIContent 'MDRcv -> CM (ChatItem c 'MDRcv)
+saveRcvChatItemNoParse :: (ChatTypeI c, ChatTypeQuotable c) => User -> ChatDirection c 'MDRcv -> RcvMessage -> UTCTime -> CIContent 'MDRcv -> CM (ChatItem c 'MDRcv)
+saveRcvChatItemNoParse user cd msg brokerTs = saveRcvChatItem user cd msg brokerTs . ciContentNoParse
+
+saveRcvChatItem :: (ChatTypeI c, ChatTypeQuotable c) => User -> ChatDirection c 'MDRcv -> RcvMessage -> UTCTime -> (CIContent 'MDRcv, (Text, Maybe MarkdownList)) -> CM (ChatItem c 'MDRcv)
 saveRcvChatItem user cd msg@RcvMessage {sharedMsgId_} brokerTs content =
-  saveRcvChatItem' user cd msg sharedMsgId_ brokerTs content Nothing Nothing False
+  saveRcvChatItem' user cd msg sharedMsgId_ brokerTs content Nothing Nothing False M.empty
 
-saveRcvChatItem' :: (ChatTypeI c, ChatTypeQuotable c) => User -> ChatDirection c 'MDRcv -> RcvMessage -> Maybe SharedMsgId -> UTCTime -> CIContent 'MDRcv -> Maybe (CIFile 'MDRcv) -> Maybe CITimed -> Bool -> CM (ChatItem c 'MDRcv)
-saveRcvChatItem' user cd msg@RcvMessage {forwardedByMember} sharedMsgId_ brokerTs content ciFile itemTimed live = do
+ciContentNoParse :: CIContent 'MDRcv -> (CIContent 'MDRcv, (Text, Maybe MarkdownList))
+ciContentNoParse content = (content, (ciContentToText content, Nothing))
+
+saveRcvChatItem' :: (ChatTypeI c, ChatTypeQuotable c) => User -> ChatDirection c 'MDRcv -> RcvMessage -> Maybe SharedMsgId -> UTCTime -> (CIContent 'MDRcv, (Text, Maybe MarkdownList)) -> Maybe (CIFile 'MDRcv) -> Maybe CITimed -> Bool -> Map MemberName MemberMention -> CM (ChatItem c 'MDRcv)
+saveRcvChatItem' user cd msg@RcvMessage {chatMsgEvent, forwardedByMember} sharedMsgId_ brokerTs (content, (t, ft_)) ciFile itemTimed live mentions = do
   createdAt <- liftIO getCurrentTime
-  (ciId, quotedItem, itemForwarded) <- withStore' $ \db -> do
+  withStore' $ \db -> do
     when (ciRequiresAttention content || contactChatDeleted cd) $ updateChatTs db user cd createdAt
-    r@(ciId, _, _) <- createNewRcvChatItem db user cd msg sharedMsgId_ content itemTimed live brokerTs createdAt
+    (mentions' :: Map MemberName MentionedMember, userMention) <- case cd of
+      CDGroupRcv g@GroupInfo {membership} _ -> do
+        mentions' <- getRcvMentionedMembers db user g ft_ mentions
+        let userReply = case cmToQuotedMsg chatMsgEvent of
+              Just QuotedMsg {msgRef = MsgRef {memberId = Just mId}} -> sameMemberId mId membership
+              _ -> False
+            userMention' = userReply || any (\MentionedMember {memberId} -> sameMemberId memberId membership) mentions'
+         in pure (mentions', userMention')
+      CDDirectRcv _ -> pure (M.empty, False)
+    (ciId, quotedItem, itemForwarded) <- createNewRcvChatItem db user cd msg sharedMsgId_ content itemTimed live userMention brokerTs createdAt
     forM_ ciFile $ \CIFile {fileId} -> updateFileTransferChatItemId db fileId ciId createdAt
-    pure r
-  pure $ mkChatItem cd ciId content ciFile quotedItem sharedMsgId_ itemForwarded itemTimed live brokerTs forwardedByMember createdAt
+    let ci = mkChatItem_ cd ciId content (t, ft_) ciFile quotedItem sharedMsgId_ itemForwarded itemTimed live userMention brokerTs forwardedByMember createdAt
+    case cd of
+      CDGroupRcv g _ | not (null mentions') -> createGroupCIMentions db g ci mentions'
+      _ -> pure ci
 
-mkChatItem :: (ChatTypeI c, MsgDirectionI d) => ChatDirection c d -> ChatItemId -> CIContent d -> Maybe (CIFile d) -> Maybe (CIQuote c) -> Maybe SharedMsgId -> Maybe CIForwardedFrom -> Maybe CITimed -> Bool -> ChatItemTs -> Maybe GroupMemberId -> UTCTime -> ChatItem c d
-mkChatItem cd ciId content file quotedItem sharedMsgId itemForwarded itemTimed live itemTs forwardedByMember currentTs =
-  let itemText = ciContentToText content
-      itemStatus = ciCreateStatus content
-      meta = mkCIMeta ciId content itemText itemStatus Nothing sharedMsgId itemForwarded Nothing False itemTimed (justTrue live) currentTs itemTs forwardedByMember currentTs currentTs
-   in ChatItem {chatDir = toCIDirection cd, meta, content, formattedText = parseMaybeMarkdownList itemText, quotedItem, reactions = [], file}
+-- TODO [mentions] optimize by avoiding unnecessary parsing
+mkChatItem :: (ChatTypeI c, MsgDirectionI d) => ChatDirection c d -> ChatItemId -> CIContent d -> Maybe (CIFile d) -> Maybe (CIQuote c) -> Maybe SharedMsgId -> Maybe CIForwardedFrom -> Maybe CITimed -> Bool -> Bool -> ChatItemTs -> Maybe GroupMemberId -> UTCTime -> ChatItem c d
+mkChatItem cd ciId content file quotedItem sharedMsgId itemForwarded itemTimed live userMention itemTs forwardedByMember currentTs =
+  let ts = ciContentTexts content
+   in mkChatItem_ cd ciId content ts file quotedItem sharedMsgId itemForwarded itemTimed live userMention itemTs forwardedByMember currentTs
+
+mkChatItem_ :: (ChatTypeI c, MsgDirectionI d) => ChatDirection c d -> ChatItemId -> CIContent d -> (Text, Maybe MarkdownList) -> Maybe (CIFile d) -> Maybe (CIQuote c) -> Maybe SharedMsgId -> Maybe CIForwardedFrom -> Maybe CITimed -> Bool -> Bool -> ChatItemTs -> Maybe GroupMemberId -> UTCTime -> ChatItem c d
+mkChatItem_ cd ciId content (itemText, formattedText) file quotedItem sharedMsgId itemForwarded itemTimed live userMention itemTs forwardedByMember currentTs =
+  let itemStatus = ciCreateStatus content
+      meta = mkCIMeta ciId content itemText itemStatus Nothing sharedMsgId itemForwarded Nothing False itemTimed (justTrue live) userMention currentTs itemTs forwardedByMember currentTs currentTs
+   in ChatItem {chatDir = toCIDirection cd, meta, content, mentions = M.empty, formattedText, quotedItem, reactions = [], file}
 
 createAgentConnectionAsync :: ConnectionModeI c => User -> CommandFunction -> Bool -> SConnectionMode c -> SubscriptionMode -> CM (CommandId, ConnId)
 createAgentConnectionAsync user cmdFunction enableNtfs cMode subMode = do
@@ -1815,26 +1901,26 @@ createInternalItemsForChats user itemTs_ dirsCIContents = do
     createACIs :: DB.Connection -> UTCTime -> UTCTime -> ChatDirection c d -> [CIContent d] -> [IO AChatItem]
     createACIs db itemTs createdAt cd = map $ \content -> do
       ciId <- createNewChatItemNoMsg db user cd content itemTs createdAt
-      let ci = mkChatItem cd ciId content Nothing Nothing Nothing Nothing Nothing False itemTs Nothing createdAt
+      let ci = mkChatItem cd ciId content Nothing Nothing Nothing Nothing Nothing False False itemTs Nothing createdAt
       pure $ AChatItem (chatTypeI @c) (msgDirection @d) (toChatInfo cd) ci
 
 createLocalChatItems ::
   User ->
   ChatDirection 'CTLocal 'MDSnd ->
-  [(CIContent 'MDSnd, Maybe (CIFile 'MDSnd), Maybe CIForwardedFrom)] ->
+  NonEmpty (CIContent 'MDSnd, Maybe (CIFile 'MDSnd), Maybe CIForwardedFrom, (Text, Maybe MarkdownList)) ->
   UTCTime ->
   CM [ChatItem 'CTLocal 'MDSnd]
 createLocalChatItems user cd itemsData createdAt = do
   withStore' $ \db -> updateChatTs db user cd createdAt
-  (errs, items) <- lift $ partitionEithers <$> withStoreBatch' (\db -> map (createItem db) itemsData)
+  (errs, items) <- lift $ partitionEithers <$> withStoreBatch' (\db -> map (createItem db) $ L.toList itemsData)
   unless (null errs) $ toView $ CRChatErrors (Just user) errs
   pure items
   where
-    createItem :: DB.Connection -> (CIContent 'MDSnd, Maybe (CIFile 'MDSnd), Maybe CIForwardedFrom) -> IO (ChatItem 'CTLocal 'MDSnd)
-    createItem db (content, ciFile, itemForwarded) = do
-      ciId <- createNewChatItem_ db user cd Nothing Nothing content (Nothing, Nothing, Nothing, Nothing, Nothing) itemForwarded Nothing False createdAt Nothing createdAt
+    createItem :: DB.Connection -> (CIContent 'MDSnd, Maybe (CIFile 'MDSnd), Maybe CIForwardedFrom, (Text, Maybe MarkdownList)) -> IO (ChatItem 'CTLocal 'MDSnd)
+    createItem db (content, ciFile, itemForwarded, ts) = do
+      ciId <- createNewChatItem_ db user cd Nothing Nothing content (Nothing, Nothing, Nothing, Nothing, Nothing) itemForwarded Nothing False False createdAt Nothing createdAt
       forM_ ciFile $ \CIFile {fileId} -> updateFileTransferChatItemId db fileId ciId createdAt
-      pure $ mkChatItem cd ciId content ciFile Nothing Nothing itemForwarded Nothing False createdAt Nothing createdAt
+      pure $ mkChatItem_ cd ciId content ts ciFile Nothing Nothing itemForwarded Nothing False False createdAt Nothing createdAt
 
 withUser' :: (User -> CM ChatResponse) -> CM ChatResponse
 withUser' action =
diff --git a/src/Simplex/Chat/Library/Subscriber.hs b/src/Simplex/Chat/Library/Subscriber.hs
index abef8b579b..3293e6b208 100644
--- a/src/Simplex/Chat/Library/Subscriber.hs
+++ b/src/Simplex/Chat/Library/Subscriber.hs
@@ -31,6 +31,7 @@ import Data.Int (Int64)
 import Data.List (foldl', partition)
 import Data.List.NonEmpty (NonEmpty (..), (<|))
 import qualified Data.List.NonEmpty as L
+import Data.Map.Strict (Map)
 import qualified Data.Map.Strict as M
 import Data.Maybe (catMaybes, fromMaybe, isJust, isNothing, mapMaybe)
 import Data.Text (Text)
@@ -500,7 +501,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
               case event of
                 XMsgNew mc -> newContentMessage ct'' mc msg msgMeta
                 XMsgFileDescr sharedMsgId fileDescr -> messageFileDescription ct'' sharedMsgId fileDescr
-                XMsgUpdate sharedMsgId mContent ttl live -> messageUpdate ct'' sharedMsgId mContent msg msgMeta ttl live
+                XMsgUpdate sharedMsgId mContent _ ttl live -> messageUpdate ct'' sharedMsgId mContent msg msgMeta ttl live
                 XMsgDel sharedMsgId _ -> messageDelete ct'' sharedMsgId msg msgMeta
                 XMsgReact sharedMsgId _ reaction add -> directMsgReaction ct'' sharedMsgId reaction add msg msgMeta
                 -- TODO discontinue XFile
@@ -900,7 +901,9 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
                         let CIMeta {itemTs, itemSharedMsgId, itemTimed} = meta
                             quotedItemId_ = quoteItemId =<< quotedItem
                             fInv_ = fst <$> fInvDescr_
-                        (msgContainer, _) <- prepareGroupMsg user gInfo mc quotedItemId_ Nothing fInv_ itemTimed False
+                        -- TODO [mentions] history?
+                        let (_t, ft_) = msgContentTexts mc
+                        (msgContainer, _, _) <- withStore $ \db -> prepareGroupMsg db user gInfo mc ft_ M.empty quotedItemId_ Nothing fInv_ itemTimed False
                         let senderVRange = memberChatVRange' sender
                             xMsgNewChatMsg = ChatMessage {chatVRange = senderVRange, msgId = itemSharedMsgId, chatMsgEvent = XMsgNew msgContainer}
                         fileDescrEvents <- case (snd <$> fInvDescr_, itemSharedMsgId) of
@@ -966,7 +969,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
             case event of
               XMsgNew mc -> memberCanSend m' $ newGroupContentMessage gInfo m' mc msg brokerTs False
               XMsgFileDescr sharedMsgId fileDescr -> memberCanSend m' $ groupMessageFileDescription gInfo m' sharedMsgId fileDescr
-              XMsgUpdate sharedMsgId mContent ttl live -> memberCanSend m' $ groupMessageUpdate gInfo m' sharedMsgId mContent msg brokerTs ttl live
+              XMsgUpdate sharedMsgId mContent mentions ttl live -> memberCanSend m' $ groupMessageUpdate gInfo m' sharedMsgId mContent mentions msg brokerTs ttl live
               XMsgDel sharedMsgId memberId -> groupMessageDelete gInfo m' sharedMsgId memberId msg brokerTs
               XMsgReact sharedMsgId (Just memberId) reaction add -> groupMsgReaction gInfo m' sharedMsgId memberId reaction add msg brokerTs
               -- TODO discontinue XFile
@@ -1539,7 +1542,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
     newContentMessage :: Contact -> MsgContainer -> RcvMessage -> MsgMeta -> CM ()
     newContentMessage ct@Contact {contactUsed} mc msg@RcvMessage {sharedMsgId_} msgMeta = do
       unless contactUsed $ withStore' $ \db -> updateContactUsed db user ct
-      let ExtMsgContent content fInv_ _ _ = mcExtMsgContent mc
+      let ExtMsgContent content _ fInv_ _ _ = mcExtMsgContent mc
       -- Uncomment to test stuck delivery on errors - see test testDirectMessageDelete
       -- case content of
       --   MCText "hello 111" ->
@@ -1548,18 +1551,18 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
       --   _ -> pure ()
       if isVoice content && not (featureAllowed SCFVoice forContact ct)
         then do
-          void $ newChatItem (CIRcvChatFeatureRejected CFVoice) Nothing Nothing False
+          void $ newChatItem (ciContentNoParse $ CIRcvChatFeatureRejected CFVoice) Nothing Nothing False
         else do
-          let ExtMsgContent _ _ itemTTL live_ = mcExtMsgContent mc
+          let ExtMsgContent _ _ _ itemTTL live_ = mcExtMsgContent mc
               timed_ = rcvContactCITimed ct itemTTL
               live = fromMaybe False live_
           file_ <- processFileInvitation fInv_ content $ \db -> createRcvFileTransfer db userId ct
-          newChatItem (CIRcvMsgContent content) (snd <$> file_) timed_ live
+          newChatItem (CIRcvMsgContent content, msgContentTexts content) (snd <$> file_) timed_ live
           autoAcceptFile file_
       where
         brokerTs = metaBrokerTs msgMeta
-        newChatItem ciContent ciFile_ timed_ live = do
-          ci <- saveRcvChatItem' user (CDDirectRcv ct) msg sharedMsgId_ brokerTs ciContent ciFile_ timed_ live
+        newChatItem content ciFile_ timed_ live = do
+          ci <- saveRcvChatItem' user (CDDirectRcv ct) msg sharedMsgId_ brokerTs content ciFile_ timed_ live M.empty
           reactions <- maybe (pure []) (\sharedMsgId -> withStore' $ \db -> getDirectCIReactions db ct sharedMsgId) sharedMsgId_
           toView $ CRNewChatItems user [AChatItem SCTDirect SMDRcv (DirectChat ct) ci {reactions}]
 
@@ -1625,7 +1628,8 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
         -- received an update from the sender, so that it can be referenced later (e.g. by broadcast delete).
         -- Chat item and update message which created it will have different sharedMsgId in this case...
         let timed_ = rcvContactCITimed ct ttl
-        ci <- saveRcvChatItem' user (CDDirectRcv ct) msg (Just sharedMsgId) brokerTs content Nothing timed_ live
+            ts = ciContentTexts content
+        ci <- saveRcvChatItem' user (CDDirectRcv ct) msg (Just sharedMsgId) brokerTs (content, ts) Nothing timed_ live M.empty
         ci' <- withStore' $ \db -> do
           createChatItemVersion db (chatItemId' ci) brokerTs mc
           updateDirectChatItem' db user contactId ci content True live Nothing Nothing
@@ -1728,7 +1732,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
     newGroupContentMessage :: GroupInfo -> GroupMember -> MsgContainer -> RcvMessage -> UTCTime -> Bool -> CM ()
     newGroupContentMessage gInfo m@GroupMember {memberId, memberRole} mc msg@RcvMessage {sharedMsgId_} brokerTs forwarded
       | blockedByAdmin m = createBlockedByAdmin
-      | otherwise = case prohibitedGroupContent gInfo m content fInv_ of
+      | otherwise = case prohibitedGroupContent gInfo m content ft_ fInv_ of
           Just f -> rejected f
           Nothing ->
             withStore' (\db -> getCIModeration db vr user gInfo memberId sharedMsgId_) >>= \case
@@ -1737,13 +1741,14 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
                 withStore' $ \db -> deleteCIModeration db gInfo memberId sharedMsgId_
               Nothing -> createContentItem
       where
-        rejected f = void $ newChatItem (CIRcvGroupFeatureRejected f) Nothing Nothing False
+        rejected f = void $ newChatItem (ciContentNoParse $ CIRcvGroupFeatureRejected f) Nothing Nothing False
         timed' = if forwarded then rcvCITimed_ (Just Nothing) itemTTL else rcvGroupCITimed gInfo itemTTL
         live' = fromMaybe False live_
-        ExtMsgContent content fInv_ itemTTL live_ = mcExtMsgContent mc
+        ExtMsgContent content mentions fInv_ itemTTL live_ = mcExtMsgContent mc
+        ts@(_, ft_) = msgContentTexts content
         createBlockedByAdmin
           | groupFeatureAllowed SGFFullDelete gInfo = do -- ignores member role when blocked by admin
-              ci <- saveRcvChatItem' user (CDGroupRcv gInfo m) msg sharedMsgId_ brokerTs CIRcvBlocked Nothing timed' False
+              ci <- saveRcvChatItem' user (CDGroupRcv gInfo m) msg sharedMsgId_ brokerTs (ciContentNoParse CIRcvBlocked) Nothing timed' False M.empty
               ci' <- withStore' $ \db -> updateGroupCIBlockedByAdmin db user gInfo ci brokerTs
               groupMsgToView gInfo ci'
           | otherwise = do
@@ -1755,7 +1760,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
           | moderatorRole < GRModerator || moderatorRole < memberRole =
               createContentItem
           | groupFeatureMemberAllowed SGFFullDelete moderator gInfo = do
-              ci <- saveRcvChatItem' user (CDGroupRcv gInfo m) msg sharedMsgId_ brokerTs CIRcvModerated Nothing timed' False
+              ci <- saveRcvChatItem' user (CDGroupRcv gInfo m) msg sharedMsgId_ brokerTs (ciContentNoParse CIRcvModerated) Nothing timed' False M.empty
               ci' <- withStore' $ \db -> updateGroupChatItemModerated db user gInfo ci moderator moderatedAt
               groupMsgToView gInfo ci'
           | otherwise = do
@@ -1763,22 +1768,23 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
               ci <- createNonLive file_
               toView =<< markGroupCIsDeleted user gInfo [CChatItem SMDRcv ci] False (Just moderator) moderatedAt
         createNonLive file_ =
-          saveRcvChatItem' user (CDGroupRcv gInfo m) msg sharedMsgId_ brokerTs (CIRcvMsgContent content) (snd <$> file_) timed' False
+          saveRcvChatItem' user (CDGroupRcv gInfo m) msg sharedMsgId_ brokerTs (CIRcvMsgContent content, ts) (snd <$> file_) timed' False mentions
         createContentItem = do
           file_ <- processFileInv
-          newChatItem (CIRcvMsgContent content) (snd <$> file_) timed' live'
+          newChatItem (CIRcvMsgContent content, ts) (snd <$> file_) timed' live'
           when (showMessages $ memberSettings m) $ autoAcceptFile file_
         processFileInv =
           processFileInvitation fInv_ content $ \db -> createRcvGroupFileTransfer db userId m
         newChatItem ciContent ciFile_ timed_ live = do
-          ci <- saveRcvChatItem' user (CDGroupRcv gInfo m) msg sharedMsgId_ brokerTs ciContent ciFile_ timed_ live
+          let mentions' = if showMessages (memberSettings m) then mentions else []
+          ci <- saveRcvChatItem' user (CDGroupRcv gInfo m) msg sharedMsgId_ brokerTs ciContent ciFile_ timed_ live mentions'
           ci' <- blockedMember m ci $ withStore' $ \db -> markGroupChatItemBlocked db user gInfo ci
           reactions <- maybe (pure []) (\sharedMsgId -> withStore' $ \db -> getGroupCIReactions db gInfo memberId sharedMsgId) sharedMsgId_
           groupMsgToView gInfo ci' {reactions}
 
-    groupMessageUpdate :: GroupInfo -> GroupMember -> SharedMsgId -> MsgContent -> RcvMessage -> UTCTime -> Maybe Int -> Maybe Bool -> CM ()
-    groupMessageUpdate gInfo@GroupInfo {groupId} m@GroupMember {groupMemberId, memberId} sharedMsgId mc msg@RcvMessage {msgId} brokerTs ttl_ live_
-      | prohibitedSimplexLinks gInfo m mc =
+    groupMessageUpdate :: GroupInfo -> GroupMember -> SharedMsgId -> MsgContent -> Map MemberName MemberMention -> RcvMessage -> UTCTime -> Maybe Int -> Maybe Bool -> CM ()
+    groupMessageUpdate gInfo@GroupInfo {groupId} m@GroupMember {groupMemberId, memberId} sharedMsgId mc mentions msg@RcvMessage {msgId} brokerTs ttl_ live_
+      | prohibitedSimplexLinks gInfo m ft_ =
           messageWarning $ "x.msg.update ignored: feature not allowed " <> groupFeatureNameText GFSimplexLinks
       | otherwise = do
           updateRcvChatItem `catchCINotFound` \_ -> do
@@ -1786,7 +1792,8 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
             -- received an update from the sender, so that it can be referenced later (e.g. by broadcast delete).
             -- Chat item and update message which created it will have different sharedMsgId in this case...
             let timed_ = rcvGroupCITimed gInfo ttl_
-            ci <- saveRcvChatItem' user (CDGroupRcv gInfo m) msg (Just sharedMsgId) brokerTs content Nothing timed_ live
+                mentions' = if showMessages (memberSettings m) then mentions else []
+            ci <- saveRcvChatItem' user (CDGroupRcv gInfo m) msg (Just sharedMsgId) brokerTs (content, ts) Nothing timed_ live mentions'
             ci' <- withStore' $ \db -> do
               createChatItemVersion db (chatItemId' ci) brokerTs mc
               ci' <- updateGroupChatItem db user groupId ci content True live Nothing
@@ -1794,6 +1801,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
             toView $ CRChatItemUpdated user (AChatItem SCTGroup SMDRcv (GroupChat gInfo) ci')
       where
         content = CIRcvMsgContent mc
+        ts@(_, ft_) = msgContentTexts mc
         live = fromMaybe False live_
         updateRcvChatItem = do
           cci <- withStore $ \db -> getGroupChatItemBySharedMsgId db user groupId groupMemberId sharedMsgId
@@ -1809,7 +1817,9 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
                           addInitialAndNewCIVersions db (chatItemId' ci) (chatItemTs' ci, oldMC) (brokerTs, mc)
                         reactions <- getGroupCIReactions db gInfo memberId sharedMsgId
                         let edited = itemLive /= Just True
-                        updateGroupChatItem db user groupId ci {reactions} content edited live $ Just msgId
+                        mentionedMembers <- getRcvMentionedMembers db user gInfo ft_ mentions
+                        ci' <- updateGroupChatItem db user groupId ci {reactions} content edited live $ Just msgId
+                        updateGroupCIMentions db gInfo ci' mentionedMembers
                       toView $ CRChatItemUpdated user (AChatItem SCTGroup SMDRcv (GroupChat gInfo) ci')
                       startUpdatedTimedItemThread user (ChatRef CTGroup groupId) ci ci'
                     else toView $ CRChatItemNotChanged user (AChatItem SCTGroup SMDRcv (GroupChat gInfo) ci)
@@ -1870,7 +1880,8 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
       RcvFileTransfer {fileId, xftpRcvFile} <- withStore $ \db -> createRcvFileTransfer db userId ct fInv inline fileChunkSize
       let fileProtocol = if isJust xftpRcvFile then FPXFTP else FPSMP
           ciFile = Just $ CIFile {fileId, fileName, fileSize, fileSource = Nothing, fileStatus = CIFSRcvInvitation, fileProtocol}
-      ci <- saveRcvChatItem' user (CDDirectRcv ct) msg sharedMsgId_ brokerTs (CIRcvMsgContent $ MCFile "") ciFile Nothing False
+          content = ciContentNoParse $ CIRcvMsgContent $ MCFile ""
+      ci <- saveRcvChatItem' user (CDDirectRcv ct) msg sharedMsgId_ brokerTs content ciFile Nothing False M.empty
       toView $ CRNewChatItems user [AChatItem SCTDirect SMDRcv (DirectChat ct) ci]
       where
         brokerTs = metaBrokerTs msgMeta
@@ -1883,7 +1894,8 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
       RcvFileTransfer {fileId, xftpRcvFile} <- withStore $ \db -> createRcvGroupFileTransfer db userId m fInv inline fileChunkSize
       let fileProtocol = if isJust xftpRcvFile then FPXFTP else FPSMP
           ciFile = Just $ CIFile {fileId, fileName, fileSize, fileSource = Nothing, fileStatus = CIFSRcvInvitation, fileProtocol}
-      ci <- saveRcvChatItem' user (CDGroupRcv gInfo m) msg sharedMsgId_ brokerTs (CIRcvMsgContent $ MCFile "") ciFile Nothing False
+          content = ciContentNoParse $ CIRcvMsgContent $ MCFile ""
+      ci <- saveRcvChatItem' user (CDGroupRcv gInfo m) msg sharedMsgId_ brokerTs content ciFile Nothing False M.empty
       ci' <- blockedMember m ci $ withStore' $ \db -> markGroupChatItemBlocked db user gInfo ci
       groupMsgToView gInfo ci'
 
@@ -2063,7 +2075,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
             toView $ CRUserAcceptedGroupSent user gInfo {membership = membership {memberStatus = GSMemAccepted}} (Just ct)
           else do
             let content = CIRcvGroupInvitation (CIGroupInvitation {groupId, groupMemberId, localDisplayName, groupProfile, status = CIGISPending}) memRole
-            ci <- saveRcvChatItem user (CDDirectRcv ct) msg brokerTs content
+            ci <- saveRcvChatItemNoParse user (CDDirectRcv ct) msg brokerTs content
             withStore' $ \db -> setGroupInvitationChatItemId db user groupId (chatItemId' ci)
             toView $ CRNewChatItems user [AChatItem SCTDirect SMDRcv (DirectChat ct) ci]
             toView $ CRReceivedGroupInvitation {user, groupInfo = gInfo, contact = ct, fromMemberRole = fromRole, memberRole = memRole}
@@ -2091,7 +2103,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
           forM_ contactConns $ \conn -> withStore' $ \db -> updateConnectionStatus db conn ConnDeleted
           activeConn' <- forM (contactConn ct') $ \conn -> pure conn {connStatus = ConnDeleted}
           let ct'' = ct' {activeConn = activeConn'} :: Contact
-          ci <- saveRcvChatItem user (CDDirectRcv ct'') msg brokerTs (CIRcvDirectEvent RDEContactDeleted)
+          ci <- saveRcvChatItemNoParse user (CDDirectRcv ct'') msg brokerTs (CIRcvDirectEvent RDEContactDeleted)
           toView $ CRNewChatItems user [AChatItem SCTDirect SMDRcv (DirectChat ct'') ci]
           toView $ CRContactDeletedByContact user ct''
         else do
@@ -2300,9 +2312,10 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
         else featureRejected CFCalls
       where
         brokerTs = metaBrokerTs msgMeta
-        saveCallItem status = saveRcvChatItem user (CDDirectRcv ct) msg brokerTs (CIRcvCall status 0)
+        saveCallItem status = saveRcvChatItemNoParse user (CDDirectRcv ct) msg brokerTs (CIRcvCall status 0)
         featureRejected f = do
-          ci <- saveRcvChatItem' user (CDDirectRcv ct) msg sharedMsgId_ brokerTs (CIRcvChatFeatureRejected f) Nothing Nothing False
+          let content = ciContentNoParse $ CIRcvChatFeatureRejected f
+          ci <- saveRcvChatItem' user (CDDirectRcv ct) msg sharedMsgId_ brokerTs content Nothing Nothing False M.empty
           toView $ CRNewChatItems user [AChatItem SCTDirect SMDRcv (DirectChat ct) ci]
 
     -- to party initiating call
@@ -2480,7 +2493,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
       where
         memberAnnouncedToView announcedMember@GroupMember {groupMemberId, memberProfile} = do
           let event = RGEMemberAdded groupMemberId (fromLocalProfile memberProfile)
-          ci <- saveRcvChatItem user (CDGroupRcv gInfo m) msg brokerTs (CIRcvGroupEvent event)
+          ci <- saveRcvChatItemNoParse user (CDGroupRcv gInfo m) msg brokerTs (CIRcvGroupEvent event)
           groupMsgToView gInfo ci
           toView $ CRJoinedGroupMemberConnecting user gInfo m announcedMember
 
@@ -2567,7 +2580,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
           | senderRole < GRAdmin || senderRole < fromRole = messageError "x.grp.mem.role with insufficient member permissions"
           | otherwise = do
               withStore' $ \db -> updateGroupMemberRole db user member memRole
-              ci <- saveRcvChatItem user (CDGroupRcv gInfo m) msg brokerTs (CIRcvGroupEvent gEvent)
+              ci <- saveRcvChatItemNoParse user (CDGroupRcv gInfo m) msg brokerTs (CIRcvGroupEvent gEvent)
               groupMsgToView gInfo ci
               toView CRMemberRole {user, groupInfo = gInfo', byMember = m, member = member {memberRole = memRole}, fromRole, toRole = memRole}
 
@@ -2594,7 +2607,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
                     bm' <- setMemberBlocked bmId
                     toggleNtf user bm' (not blocked)
                     let ciContent = CIRcvGroupEvent $ RGEMemberBlocked bmId (fromLocalProfile bmp) blocked
-                    ci <- saveRcvChatItem user (CDGroupRcv gInfo m) msg brokerTs ciContent
+                    ci <- saveRcvChatItemNoParse user (CDGroupRcv gInfo m) msg brokerTs ciContent
                     groupMsgToView gInfo ci
                     toView CRMemberBlockedForAll {user, groupInfo = gInfo, byMember = m, member = bm, blocked}
               Left (SEGroupMemberNotFoundByMemberId _) -> do
@@ -2679,7 +2692,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
               messageError "x.grp.mem.del with insufficient member permissions"
           | otherwise = a
         deleteMemberItem gEvent = do
-          ci <- saveRcvChatItem user (CDGroupRcv gInfo m) msg brokerTs (CIRcvGroupEvent gEvent)
+          ci <- saveRcvChatItemNoParse user (CDGroupRcv gInfo m) msg brokerTs (CIRcvGroupEvent gEvent)
           groupMsgToView gInfo ci
 
     xGrpLeave :: GroupInfo -> GroupMember -> RcvMessage -> UTCTime -> CM ()
@@ -2687,7 +2700,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
       deleteMemberConnection user m
       -- member record is not deleted to allow creation of "member left" chat item
       withStore' $ \db -> updateGroupMemberStatus db userId m GSMemLeft
-      ci <- saveRcvChatItem user (CDGroupRcv gInfo m) msg brokerTs (CIRcvGroupEvent RGEMemberLeft)
+      ci <- saveRcvChatItemNoParse user (CDGroupRcv gInfo m) msg brokerTs (CIRcvGroupEvent RGEMemberLeft)
       groupMsgToView gInfo ci
       toView $ CRLeftMember user gInfo m {memberStatus = GSMemLeft}
 
@@ -2700,7 +2713,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
         pure members
       -- member records are not deleted to keep history
       deleteMembersConnections user ms
-      ci <- saveRcvChatItem user (CDGroupRcv gInfo m) msg brokerTs (CIRcvGroupEvent RGEGroupDeleted)
+      ci <- saveRcvChatItemNoParse user (CDGroupRcv gInfo m) msg brokerTs (CIRcvGroupEvent RGEGroupDeleted)
       groupMsgToView gInfo ci
       toView $ CRGroupDeleted user gInfo {membership = membership {memberStatus = GSMemGroupDeleted}} m
 
@@ -2713,7 +2726,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
             toView $ CRGroupUpdated user g g' (Just m)
             let cd = CDGroupRcv g' m
             unless (sameGroupProfileInfo p p') $ do
-              ci <- saveRcvChatItem user cd msg brokerTs (CIRcvGroupEvent $ RGEGroupUpdated p')
+              ci <- saveRcvChatItemNoParse user cd msg brokerTs (CIRcvGroupEvent $ RGEGroupUpdated p')
               groupMsgToView g' ci
             createGroupFeatureChangedItems user cd CIRcvGroupFeature g g'
           Just _ -> updateGroupPrefs_ g m $ fromMaybe defaultBusinessGroupPrefs $ groupPreferences p'
@@ -2772,7 +2785,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
           createInternalChatItem user (CDGroupRcv g m') (CIRcvGroupEvent RGEMemberCreatedContact) Nothing
           toView $ CRNewMemberContactReceivedInv user mCt' g m'
           forM_ mContent_ $ \mc -> do
-            ci <- saveRcvChatItem user (CDDirectRcv mCt') msg brokerTs (CIRcvMsgContent mc)
+            ci <- saveRcvChatItem user (CDDirectRcv mCt') msg brokerTs (CIRcvMsgContent mc, msgContentTexts mc)
             toView $ CRNewChatItems user [AChatItem SCTDirect SMDRcv (DirectChat mCt') ci]
 
     securityCodeChanged :: Contact -> CM ()
@@ -2799,7 +2812,7 @@ processAgentMessageConn vr user@User {userId} corrId agentConnId agentMessage =
           case event of
             XMsgNew mc -> memberCanSend author $ newGroupContentMessage gInfo author mc rcvMsg msgTs True
             XMsgFileDescr sharedMsgId fileDescr -> memberCanSend author $ groupMessageFileDescription gInfo author sharedMsgId fileDescr
-            XMsgUpdate sharedMsgId mContent ttl live -> memberCanSend author $ groupMessageUpdate gInfo author sharedMsgId mContent rcvMsg msgTs ttl live
+            XMsgUpdate sharedMsgId mContent mentions ttl live -> memberCanSend author $ groupMessageUpdate gInfo author sharedMsgId mContent mentions rcvMsg msgTs ttl live
             XMsgDel sharedMsgId memId -> groupMessageDelete gInfo author sharedMsgId memId rcvMsg msgTs
             XMsgReact sharedMsgId (Just memId) reaction add -> groupMsgReaction gInfo author sharedMsgId memId reaction add rcvMsg msgTs
             XFileCancel sharedMsgId -> xFileCancelGroup gInfo author sharedMsgId
diff --git a/src/Simplex/Chat/Markdown.hs b/src/Simplex/Chat/Markdown.hs
index 8e82bfe727..9b6359b4ae 100644
--- a/src/Simplex/Chat/Markdown.hs
+++ b/src/Simplex/Chat/Markdown.hs
@@ -22,7 +22,7 @@ import Data.Functor (($>))
 import Data.List (foldl', intercalate)
 import Data.List.NonEmpty (NonEmpty)
 import qualified Data.List.NonEmpty as L
-import Data.Maybe (fromMaybe, isNothing)
+import Data.Maybe (fromMaybe, isNothing, mapMaybe)
 import Data.Semigroup (sconcat)
 import Data.String
 import Data.Text (Text)
@@ -50,18 +50,28 @@ data Format
   | Colored {color :: FormatColor}
   | Uri
   | SimplexLink {linkType :: SimplexLinkType, simplexUri :: Text, smpHosts :: NonEmpty Text}
+  | Mention {memberName :: Text}
   | Email
   | Phone
   deriving (Eq, Show)
 
+mentionedNames :: MarkdownList -> [Text]
+mentionedNames = mapMaybe (\(FormattedText f _) -> mentionedName =<< f)
+  where
+    mentionedName = \case
+      Mention name -> Just name
+      _ -> Nothing
+
 data SimplexLinkType = XLContact | XLInvitation | XLGroup
   deriving (Eq, Show)
 
 colored :: Color -> Format
 colored = Colored . FormatColor
+{-# INLINE colored #-}
 
 markdown :: Format -> Text -> Markdown
 markdown = Markdown . Just
+{-# INLINE markdown #-}
 
 instance Semigroup Markdown where
   m <> (Markdown _ "") = m
@@ -163,6 +173,7 @@ markdownP = mconcat <$> A.many' fragmentP
           '`' -> formattedP '`' Snippet
           '#' -> A.char '#' *> secretP
           '!' -> coloredP <|> wordP
+          '@' -> mentionP
           _
             | isDigit c -> phoneP <|> wordP
             | otherwise -> wordP
@@ -192,6 +203,11 @@ markdownP = mconcat <$> A.many' fragmentP
       if T.null s || T.last s == ' '
         then fail "not colored"
         else pure $ markdown (colored clr) s
+    mentionP = do
+      c <- A.char '@' *> A.peekChar'
+      name <- displayNameTextP
+      let sName = if c == '\'' then '\'' `T.cons` name `T.snoc` '\'' else name
+      pure $ markdown (Mention name) ('@' `T.cons` sName)
     colorP =
       A.anyChar >>= \case
         'r' -> "ed" $> Red <|> pure Red
@@ -251,6 +267,15 @@ markdownP = mconcat <$> A.many' fragmentP
           Just (CRDataGroup _) -> XLGroup
           Nothing -> XLContact
 
+displayNameTextP :: Parser Text
+displayNameTextP = quoted '\'' <|> takeNameTill (== ' ')
+  where
+    takeNameTill p =
+      A.peekChar' >>= \c ->
+        if refChar c then A.takeTill p else fail "invalid first character in display name"
+    quoted c = A.char c *> takeNameTill (== c) <* A.char c
+    refChar c = c > ' ' && c /= '#' && c /= '@' && c /= '\''
+
 $(JQ.deriveJSON (enumJSON $ dropPrefix "XL") ''SimplexLinkType)
 
 $(JQ.deriveJSON (sumTypeJSON fstToLower) ''Format)
diff --git a/src/Simplex/Chat/Messages.hs b/src/Simplex/Chat/Messages.hs
index 55542b1d2f..2010e4b4a6 100644
--- a/src/Simplex/Chat/Messages.hs
+++ b/src/Simplex/Chat/Messages.hs
@@ -31,6 +31,7 @@ import Data.Char (isSpace)
 import Data.Int (Int64)
 import Data.Kind (Constraint)
 import Data.List.NonEmpty (NonEmpty)
+import Data.Map.Strict (Map)
 import Data.Maybe (fromMaybe, isJust, isNothing)
 import Data.Text (Text)
 import qualified Data.Text as T
@@ -46,6 +47,7 @@ import Simplex.Chat.Options.DB (FromField (..), ToField (..))
 import Simplex.Chat.Protocol
 import Simplex.Chat.Types
 import Simplex.Chat.Types.Preferences
+import Simplex.Chat.Types.Shared
 import Simplex.Chat.Types.Util (textParseJSON)
 import Simplex.Messaging.Agent.Protocol (AgentMsgId, MsgMeta (..), MsgReceiptStatus (..))
 import Simplex.Messaging.Crypto.File (CryptoFile (..))
@@ -150,6 +152,9 @@ data ChatItem (c :: ChatType) (d :: MsgDirection) = ChatItem
   { chatDir :: CIDirection c d,
     meta :: CIMeta c d,
     content :: CIContent d,
+    -- The `mentions` map prevents loading all members from UI.
+    -- The key is a name used in the message text, used to look up MentionedMember.
+    mentions :: Map MemberName MentionedMember,
     formattedText :: Maybe MarkdownList,
     quotedItem :: Maybe (CIQuote c),
     reactions :: [CIReactionCount],
@@ -157,18 +162,24 @@ data ChatItem (c :: ChatType) (d :: MsgDirection) = ChatItem
   }
   deriving (Show)
 
-isMention :: ChatItem c d -> Bool
-isMention ChatItem {chatDir, quotedItem} = case chatDir of
-  CIDirectRcv -> userItem quotedItem
-  CIGroupRcv _ -> userItem quotedItem
-  _ -> False
-  where
-    userItem = \case
-      Nothing -> False
-      Just CIQuote {chatDir = cd} -> case cd of
-        CIQDirectSnd -> True
-        CIQGroupSnd -> True
-        _ -> False
+data MentionedMember = MentionedMember
+  { memberId :: MemberId,
+    -- member record can be created later than the mention is received
+    -- TODO [mentions] should we create member record for "unknown member" in this case?
+    memberRef :: Maybe MentionedMemberInfo
+  }
+  deriving (Eq, Show)
+
+data MentionedMemberInfo = MentionedMemberInfo
+  { groupMemberId :: GroupMemberId,
+    displayName :: Text, -- use `displayName` in copy/share actions
+    localAlias :: Maybe Text, -- use `fromMaybe displayName localAlias` in chat view
+    memberRole :: GroupMemberRole -- shown for admins/owners in the message
+  }
+  deriving (Eq, Show)
+
+isUserMention :: ChatItem c d -> Bool
+isUserMention ChatItem {meta = CIMeta {userMention}} = userMention
 
 data CIDirection (c :: ChatType) (d :: MsgDirection) where
   CIDirectSnd :: CIDirection 'CTDirect 'MDSnd
@@ -364,6 +375,7 @@ data CIMeta (c :: ChatType) (d :: MsgDirection) = CIMeta
     itemEdited :: Bool,
     itemTimed :: Maybe CITimed,
     itemLive :: Maybe Bool,
+    userMention :: Bool, -- True for messages that mention user or reply to user messages
     deletable :: Bool,
     editable :: Bool,
     forwardedByMember :: Maybe GroupMemberId,
@@ -372,11 +384,11 @@ data CIMeta (c :: ChatType) (d :: MsgDirection) = CIMeta
   }
   deriving (Show)
 
-mkCIMeta :: forall c d. ChatTypeI c => ChatItemId -> CIContent d -> Text -> CIStatus d -> Maybe Bool -> Maybe SharedMsgId -> Maybe CIForwardedFrom -> Maybe (CIDeleted c) -> Bool -> Maybe CITimed -> Maybe Bool -> UTCTime -> ChatItemTs -> Maybe GroupMemberId -> UTCTime -> UTCTime -> CIMeta c d
-mkCIMeta itemId itemContent itemText itemStatus sentViaProxy itemSharedMsgId itemForwarded itemDeleted itemEdited itemTimed itemLive currentTs itemTs forwardedByMember createdAt updatedAt =
+mkCIMeta :: forall c d. ChatTypeI c => ChatItemId -> CIContent d -> Text -> CIStatus d -> Maybe Bool -> Maybe SharedMsgId -> Maybe CIForwardedFrom -> Maybe (CIDeleted c) -> Bool -> Maybe CITimed -> Maybe Bool -> Bool -> UTCTime -> ChatItemTs -> Maybe GroupMemberId -> UTCTime -> UTCTime -> CIMeta c d
+mkCIMeta itemId itemContent itemText itemStatus sentViaProxy itemSharedMsgId itemForwarded itemDeleted itemEdited itemTimed itemLive userMention currentTs itemTs forwardedByMember createdAt updatedAt =
   let deletable = deletable' itemContent itemDeleted itemTs nominalDay currentTs
       editable = deletable && isNothing itemForwarded
-   in CIMeta {itemId, itemTs, itemText, itemStatus, sentViaProxy, itemSharedMsgId, itemForwarded, itemDeleted, itemEdited, itemTimed, itemLive, deletable, editable, forwardedByMember, createdAt, updatedAt}
+   in CIMeta {itemId, itemTs, itemText, itemStatus, sentViaProxy, itemSharedMsgId, itemForwarded, itemDeleted, itemEdited, itemTimed, itemLive, userMention, deletable, editable, forwardedByMember, createdAt, updatedAt}
 
 deletable' :: forall c d. ChatTypeI c => CIContent d -> Maybe (CIDeleted c) -> UTCTime -> NominalDiffTime -> UTCTime -> Bool
 deletable' itemContent itemDeleted itemTs allowedInterval currentTs =
@@ -401,6 +413,7 @@ dummyMeta itemId ts itemText =
       itemEdited = False,
       itemTimed = Nothing,
       itemLive = Nothing,
+      userMention = False,
       deletable = False,
       editable = False,
       forwardedByMember = Nothing,
@@ -1247,14 +1260,14 @@ data ChatItemVersion = ChatItemVersion
   deriving (Eq, Show)
 
 mkItemVersion :: ChatItem c d -> Maybe ChatItemVersion
-mkItemVersion ChatItem {content, meta} = version <$> ciMsgContent content
+mkItemVersion ChatItem {content, formattedText, meta} = version <$> ciMsgContent content
   where
     CIMeta {itemId, itemTs, createdAt} = meta
     version mc =
       ChatItemVersion
         { chatItemVersionId = itemId,
           msgContent = mc,
-          formattedText = parseMaybeMarkdownList $ msgContentText mc,
+          formattedText,
           itemVersionTs = itemTs,
           createdAt = createdAt
         }
@@ -1387,6 +1400,10 @@ $(JQ.deriveToJSON defaultJSON ''CIQuote)
 
 $(JQ.deriveJSON defaultJSON ''CIReactionCount)
 
+$(JQ.deriveJSON defaultJSON ''MentionedMemberInfo)
+
+$(JQ.deriveJSON defaultJSON ''MentionedMember)
+
 instance (ChatTypeI c, MsgDirectionI d) => FromJSON (ChatItem c d) where
   parseJSON = $(JQ.mkParseJSON defaultJSON ''ChatItem)
 
diff --git a/src/Simplex/Chat/Protocol.hs b/src/Simplex/Chat/Protocol.hs
index 9cbc63b0e2..0a9b378a6b 100644
--- a/src/Simplex/Chat/Protocol.hs
+++ b/src/Simplex/Chat/Protocol.hs
@@ -35,6 +35,8 @@ import Data.ByteString.Internal (c2w, w2c)
 import qualified Data.ByteString.Lazy.Char8 as LB
 import Data.List.NonEmpty (NonEmpty (..))
 import qualified Data.List.NonEmpty as L
+import Data.Map.Strict (Map)
+import qualified Data.Map.Strict as M
 import Data.Maybe (fromMaybe, mapMaybe)
 import Data.String
 import Data.Text (Text)
@@ -310,7 +312,7 @@ data AChatMessage = forall e. MsgEncodingI e => ACMsg (SMsgEncoding e) (ChatMess
 data ChatMsgEvent (e :: MsgEncoding) where
   XMsgNew :: MsgContainer -> ChatMsgEvent 'Json
   XMsgFileDescr :: {msgId :: SharedMsgId, fileDescr :: FileDescr} -> ChatMsgEvent 'Json
-  XMsgUpdate :: {msgId :: SharedMsgId, content :: MsgContent, ttl :: Maybe Int, live :: Maybe Bool} -> ChatMsgEvent 'Json
+  XMsgUpdate :: {msgId :: SharedMsgId, content :: MsgContent, mentions :: Map MemberName MemberMention, ttl :: Maybe Int, live :: Maybe Bool} -> ChatMsgEvent 'Json
   XMsgDel :: SharedMsgId -> Maybe MemberId -> ChatMsgEvent 'Json
   XMsgDeleted :: ChatMsgEvent 'Json
   XMsgReact :: {msgId :: SharedMsgId, memberId :: Maybe MemberId, reaction :: MsgReaction, add :: Bool} -> ChatMsgEvent 'Json
@@ -531,6 +533,11 @@ mcExtMsgContent = \case
   MCComment _ c -> c
   MCForward c -> c
 
+isMCForward :: MsgContainer -> Bool
+isMCForward = \case
+  MCForward _ -> True
+  _ -> False
+
 data MsgContent
   = MCText Text
   | MCLink {text :: Text, preview :: LinkPreview}
@@ -589,9 +596,23 @@ msgContentTag = \case
   MCReport {} -> MCReport_
   MCUnknown {tag} -> MCUnknown_ tag
 
-data ExtMsgContent = ExtMsgContent {content :: MsgContent, file :: Maybe FileInvitation, ttl :: Maybe Int, live :: Maybe Bool}
+data ExtMsgContent = ExtMsgContent
+  { content :: MsgContent,
+    -- the key used in mentions is a locally (per message) unique display name of member.
+    -- Suffixes _1, _2 should be appended to make names locally unique.
+    -- It should be done in the UI, as they will be part of the text, and validated in the API.
+    mentions :: Map MemberName MemberMention,
+    file :: Maybe FileInvitation,
+    ttl :: Maybe Int,
+    live :: Maybe Bool
+  }
   deriving (Eq, Show)
 
+data MemberMention = MemberMention {memberId :: MemberId}
+  deriving (Eq, Show)
+
+$(JQ.deriveJSON defaultJSON ''MemberMention)
+
 $(JQ.deriveJSON defaultJSON ''QuotedMsg)
 
 -- this limit reserves space for metadata in forwarded messages
@@ -657,10 +678,16 @@ parseMsgContainer v =
     <|> (MCForward <$> ((v .: "forward" :: JT.Parser J.Object) *> mc))
     <|> MCSimple <$> mc
   where
-    mc = ExtMsgContent <$> v .: "content" <*> v .:? "file" <*> v .:? "ttl" <*> v .:? "live"
+    mc = do
+      content <- v .: "content"
+      file <- v .:? "file"
+      ttl <- v .:? "ttl"
+      live <- v .:? "live"
+      mentions <- fromMaybe M.empty <$> (v .:? "mentions")
+      pure ExtMsgContent {content, mentions, file, ttl, live}
 
 extMsgContent :: MsgContent -> Maybe FileInvitation -> ExtMsgContent
-extMsgContent mc file = ExtMsgContent mc file Nothing Nothing
+extMsgContent mc file = ExtMsgContent mc M.empty file Nothing Nothing
 
 justTrue :: Bool -> Maybe Bool
 justTrue True = Just True
@@ -709,7 +736,12 @@ msgContainerJSON = \case
   MCSimple mc -> o $ msgContent mc
   where
     o = JM.fromList
-    msgContent (ExtMsgContent c file ttl live) = ("file" .=? file) $ ("ttl" .=? ttl) $ ("live" .=? live) ["content" .= c]
+    msgContent ExtMsgContent {content, mentions, file, ttl, live} =
+      ("file" .=? file) $ ("ttl" .=? ttl) $ ("live" .=? live) $ ("mentions" .=? nonEmptyMap mentions) ["content" .= content]
+
+nonEmptyMap :: Map k v -> Maybe (Map k v)
+nonEmptyMap m = if M.null m then Nothing else Just m
+{-# INLINE nonEmptyMap #-}
 
 instance ToJSON MsgContent where
   toJSON = \case
@@ -994,7 +1026,7 @@ appJsonToCM AppMessageJson {v, msgId, event, params} = do
     msg = \case
       XMsgNew_ -> XMsgNew <$> JT.parseEither parseMsgContainer params
       XMsgFileDescr_ -> XMsgFileDescr <$> p "msgId" <*> p "fileDescr"
-      XMsgUpdate_ -> XMsgUpdate <$> p "msgId" <*> p "content" <*> opt "ttl" <*> opt "live"
+      XMsgUpdate_ -> XMsgUpdate <$> p "msgId" <*> p "content" <*> (fromMaybe M.empty <$> opt "mentions") <*> opt "ttl" <*> opt "live"
       XMsgDel_ -> XMsgDel <$> p "msgId" <*> opt "memberId"
       XMsgDeleted_ -> pure XMsgDeleted
       XMsgReact_ -> XMsgReact <$> p "msgId" <*> opt "memberId" <*> p "reaction" <*> p "add"
@@ -1056,7 +1088,7 @@ chatToAppMessage ChatMessage {chatVRange, msgId, chatMsgEvent} = case encoding @
     params = \case
       XMsgNew container -> msgContainerJSON container
       XMsgFileDescr msgId' fileDescr -> o ["msgId" .= msgId', "fileDescr" .= fileDescr]
-      XMsgUpdate msgId' content ttl live -> o $ ("ttl" .=? ttl) $ ("live" .=? live) ["msgId" .= msgId', "content" .= content]
+      XMsgUpdate msgId' content mentions ttl live -> o $ ("ttl" .=? ttl) $ ("live" .=? live) $ ("mentions" .=? nonEmptyMap mentions) ["msgId" .= msgId', "content" .= content]
       XMsgDel msgId' memberId -> o $ ("memberId" .=? memberId) ["msgId" .= msgId']
       XMsgDeleted -> JM.empty
       XMsgReact msgId' memberId reaction add -> o $ ("memberId" .=? memberId) ["msgId" .= msgId', "reaction" .= reaction, "add" .= add]
diff --git a/src/Simplex/Chat/Store/Groups.hs b/src/Simplex/Chat/Store/Groups.hs
index eb820eb66d..3010841b44 100644
--- a/src/Simplex/Chat/Store/Groups.hs
+++ b/src/Simplex/Chat/Store/Groups.hs
@@ -47,6 +47,8 @@ module Simplex.Chat.Store.Groups
     getActiveMembersByName,
     getGroupInfoByName,
     getGroupMember,
+    getMentionedGroupMember,
+    getMentionedMemberByMemberId,
     getGroupMemberById,
     getGroupMemberByMemberId,
     getGroupMembers,
@@ -148,7 +150,7 @@ import Data.Ord (Down (..))
 import Data.Text (Text)
 import Data.Time.Clock (UTCTime (..), getCurrentTime)
 import Simplex.Chat.Messages
-import Simplex.Chat.Protocol (groupForwardVersion)
+import Simplex.Chat.Protocol (MemberMention (..), groupForwardVersion)
 import Simplex.Chat.Store.Direct
 import Simplex.Chat.Store.Shared
 import Simplex.Chat.Types
@@ -798,6 +800,37 @@ getGroupMember db vr user@User {userId} groupId groupMemberId =
       (groupMemberQuery <> " WHERE m.group_id = ? AND m.group_member_id = ? AND m.user_id = ?")
       (userId, groupId, groupMemberId, userId)
 
+getMentionedGroupMember :: DB.Connection -> User -> GroupId -> GroupMemberId -> ExceptT StoreError IO MentionedMember
+getMentionedGroupMember db User {userId} groupId gmId =
+  ExceptT $ firstRow toMentionedMember (SEGroupMemberNotFound gmId) $
+    DB.query
+      db
+      (mentionedMemberQuery <> " WHERE m.group_id = ? AND m.group_member_id = ? AND m.user_id = ?")
+      (groupId, gmId, userId)
+
+getMentionedMemberByMemberId :: DB.Connection -> User -> GroupId -> MemberMention -> IO MentionedMember
+getMentionedMemberByMemberId db User {userId} groupId MemberMention {memberId} =
+  fmap (fromMaybe mentionedMember) $ maybeFirstRow toMentionedMember $
+    DB.query
+      db
+      (mentionedMemberQuery <> " WHERE m.group_id = ? AND m.member_id = ? AND m.user_id = ?")
+      (groupId, memberId, userId)
+  where
+    mentionedMember = MentionedMember {memberId, memberRef = Nothing}
+
+mentionedMemberQuery :: Query
+mentionedMemberQuery =
+  [sql|
+    SELECT m.group_member_id, m.member_id, m.member_role, p.display_name, p.local_alias
+    FROM group_members m
+    JOIN contact_profiles p ON p.contact_profile_id = COALESCE(m.member_profile_id, m.contact_profile_id)
+  |]
+
+toMentionedMember :: (GroupMemberId, MemberId, GroupMemberRole, Text, Maybe Text) -> MentionedMember
+toMentionedMember (groupMemberId, memberId, memberRole, displayName, localAlias) =
+  let memberRef = Just MentionedMemberInfo {groupMemberId, displayName, localAlias, memberRole}
+   in MentionedMember {memberId, memberRef}
+
 getGroupMemberById :: DB.Connection -> VersionRangeChat -> User -> GroupMemberId -> ExceptT StoreError IO GroupMember
 getGroupMemberById db vr user@User {userId} groupMemberId =
   ExceptT . firstRow (toContactMember vr user) (SEGroupMemberNotFound groupMemberId) $
diff --git a/src/Simplex/Chat/Store/Messages.hs b/src/Simplex/Chat/Store/Messages.hs
index 58877210dc..9b8b7d3b20 100644
--- a/src/Simplex/Chat/Store/Messages.hs
+++ b/src/Simplex/Chat/Store/Messages.hs
@@ -53,6 +53,8 @@ module Simplex.Chat.Store.Messages
     markDirectChatItemDeleted,
     updateGroupChatItemStatus,
     updateGroupChatItem,
+    createGroupCIMentions,
+    updateGroupCIMentions,
     deleteGroupChatItem,
     updateGroupChatItemModerated,
     updateGroupCIBlockedByAdmin,
@@ -136,6 +138,8 @@ import Data.Int (Int64)
 import Data.List (sortBy)
 import Data.List.NonEmpty (NonEmpty)
 import qualified Data.List.NonEmpty as L
+import Data.Map.Strict (Map)
+import qualified Data.Map.Strict as M
 import Data.Maybe (catMaybes, fromMaybe, isJust, mapMaybe)
 import Data.Ord (Down (..), comparing)
 import Data.Text (Text)
@@ -152,6 +156,7 @@ import Simplex.Chat.Store.Groups
 import Simplex.Chat.Store.NoteFolders
 import Simplex.Chat.Store.Shared
 import Simplex.Chat.Types
+import Simplex.Chat.Types.Shared
 import Simplex.Messaging.Agent.Protocol (AgentMsgId, ConnId, MsgMeta (..), UserId)
 import Simplex.Messaging.Agent.Store.AgentStore (firstRow, firstRow', maybeFirstRow)
 import Simplex.Messaging.Agent.Store.DB (BoolInt (..))
@@ -367,7 +372,7 @@ updateChatTs db User {userId} chatDirection chatTs = case toChatInfo chatDirecti
 
 createNewSndChatItem :: DB.Connection -> User -> ChatDirection c 'MDSnd -> SndMessage -> CIContent 'MDSnd -> Maybe (CIQuote c) -> Maybe CIForwardedFrom -> Maybe CITimed -> Bool -> UTCTime -> IO ChatItemId
 createNewSndChatItem db user chatDirection SndMessage {msgId, sharedMsgId} ciContent quotedItem itemForwarded timed live createdAt =
-  createNewChatItem_ db user chatDirection createdByMsgId (Just sharedMsgId) ciContent quoteRow itemForwarded timed live createdAt Nothing createdAt
+  createNewChatItem_ db user chatDirection createdByMsgId (Just sharedMsgId) ciContent quoteRow itemForwarded timed live False createdAt Nothing createdAt
   where
     createdByMsgId = if msgId == 0 then Nothing else Just msgId
     quoteRow :: NewQuoteRow
@@ -381,9 +386,9 @@ createNewSndChatItem db user chatDirection SndMessage {msgId, sharedMsgId} ciCon
           CIQGroupRcv (Just GroupMember {memberId}) -> (Just False, Just memberId)
           CIQGroupRcv Nothing -> (Just False, Nothing)
 
-createNewRcvChatItem :: ChatTypeQuotable c => DB.Connection -> User -> ChatDirection c 'MDRcv -> RcvMessage -> Maybe SharedMsgId -> CIContent 'MDRcv -> Maybe CITimed -> Bool -> UTCTime -> UTCTime -> IO (ChatItemId, Maybe (CIQuote c), Maybe CIForwardedFrom)
-createNewRcvChatItem db user chatDirection RcvMessage {msgId, chatMsgEvent, forwardedByMember} sharedMsgId_ ciContent timed live itemTs createdAt = do
-  ciId <- createNewChatItem_ db user chatDirection (Just msgId) sharedMsgId_ ciContent quoteRow itemForwarded timed live itemTs forwardedByMember createdAt
+createNewRcvChatItem :: ChatTypeQuotable c => DB.Connection -> User -> ChatDirection c 'MDRcv -> RcvMessage -> Maybe SharedMsgId -> CIContent 'MDRcv -> Maybe CITimed -> Bool -> Bool -> UTCTime -> UTCTime -> IO (ChatItemId, Maybe (CIQuote c), Maybe CIForwardedFrom)
+createNewRcvChatItem db user chatDirection RcvMessage {msgId, chatMsgEvent, forwardedByMember} sharedMsgId_ ciContent timed live userMention itemTs createdAt = do
+  ciId <- createNewChatItem_ db user chatDirection (Just msgId) sharedMsgId_ ciContent quoteRow itemForwarded timed live userMention itemTs forwardedByMember createdAt
   quotedItem <- mapM (getChatItemQuote_ db user chatDirection) quotedMsg
   pure (ciId, quotedItem, itemForwarded)
   where
@@ -400,13 +405,13 @@ createNewRcvChatItem db user chatDirection RcvMessage {msgId, chatMsgEvent, forw
 
 createNewChatItemNoMsg :: forall c d. MsgDirectionI d => DB.Connection -> User -> ChatDirection c d -> CIContent d -> UTCTime -> UTCTime -> IO ChatItemId
 createNewChatItemNoMsg db user chatDirection ciContent itemTs =
-  createNewChatItem_ db user chatDirection Nothing Nothing ciContent quoteRow Nothing Nothing False itemTs Nothing
+  createNewChatItem_ db user chatDirection Nothing Nothing ciContent quoteRow Nothing Nothing False False itemTs Nothing
   where
     quoteRow :: NewQuoteRow
     quoteRow = (Nothing, Nothing, Nothing, Nothing, Nothing)
 
-createNewChatItem_ :: forall c d. MsgDirectionI d => DB.Connection -> User -> ChatDirection c d -> Maybe MessageId -> Maybe SharedMsgId -> CIContent d -> NewQuoteRow -> Maybe CIForwardedFrom -> Maybe CITimed -> Bool -> UTCTime -> Maybe GroupMemberId -> UTCTime -> IO ChatItemId
-createNewChatItem_ db User {userId} chatDirection msgId_ sharedMsgId ciContent quoteRow itemForwarded timed live itemTs forwardedByMember createdAt = do
+createNewChatItem_ :: forall c d. MsgDirectionI d => DB.Connection -> User -> ChatDirection c d -> Maybe MessageId -> Maybe SharedMsgId -> CIContent d -> NewQuoteRow -> Maybe CIForwardedFrom -> Maybe CITimed -> Bool -> Bool -> UTCTime -> Maybe GroupMemberId -> UTCTime -> IO ChatItemId
+createNewChatItem_ db User {userId} chatDirection msgId_ sharedMsgId ciContent quoteRow itemForwarded timed live userMention itemTs forwardedByMember createdAt = do
   DB.execute
     db
     [sql|
@@ -415,20 +420,20 @@ createNewChatItem_ db User {userId} chatDirection msgId_ sharedMsgId ciContent q
         user_id, created_by_msg_id, contact_id, group_id, group_member_id, note_folder_id,
         -- meta
         item_sent, item_ts, item_content, item_content_tag, item_text, item_status, msg_content_tag, shared_msg_id,
-        forwarded_by_group_member_id, include_in_history, created_at, updated_at, item_live, timed_ttl, timed_delete_at,
+        forwarded_by_group_member_id, include_in_history, created_at, updated_at, item_live, user_mention, timed_ttl, timed_delete_at,
         -- quote
         quoted_shared_msg_id, quoted_sent_at, quoted_content, quoted_sent, quoted_member_id,
         -- forwarded from
         fwd_from_tag, fwd_from_chat_name, fwd_from_msg_dir, fwd_from_contact_id, fwd_from_group_id, fwd_from_chat_item_id
-      ) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)
+      ) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)
     |]
     ((userId, msgId_) :. idsRow :. itemRow :. quoteRow' :. forwardedFromRow)
   ciId <- insertedRowId db
   forM_ msgId_ $ \msgId -> insertChatItemMessage_ db ciId msgId createdAt
   pure ciId
   where
-    itemRow :: (SMsgDirection d, UTCTime, CIContent d, Text, Text, CIStatus d, Maybe MsgContentTag, Maybe SharedMsgId, Maybe GroupMemberId, BoolInt) :. (UTCTime, UTCTime, Maybe BoolInt) :. (Maybe Int, Maybe UTCTime)
-    itemRow = (msgDirection @d, itemTs, ciContent, toCIContentTag ciContent, ciContentToText ciContent, ciCreateStatus ciContent, msgContentTag <$> ciMsgContent ciContent, sharedMsgId, forwardedByMember, BI includeInHistory) :. (createdAt, createdAt, BI <$> (justTrue live)) :. ciTimedRow timed
+    itemRow :: (SMsgDirection d, UTCTime, CIContent d, Text, Text, CIStatus d, Maybe MsgContentTag, Maybe SharedMsgId, Maybe GroupMemberId, BoolInt) :. (UTCTime, UTCTime, Maybe BoolInt, BoolInt) :. (Maybe Int, Maybe UTCTime)
+    itemRow = (msgDirection @d, itemTs, ciContent, toCIContentTag ciContent, ciContentToText ciContent, ciCreateStatus ciContent, msgContentTag <$> ciMsgContent ciContent, sharedMsgId, forwardedByMember, BI includeInHistory) :. (createdAt, createdAt, BI <$> (justTrue live), BI userMention) :. ciTimedRow timed
     quoteRow' = let (a, b, c, d, e) = quoteRow in (a, b, c, BI <$> d, e)
     idsRow :: (Maybe Int64, Maybe Int64, Maybe Int64, Maybe Int64)
     idsRow = case chatDirection of
@@ -766,7 +771,7 @@ getGroupChatPreview_ :: DB.Connection -> VersionRangeChat -> User -> ChatPreview
 getGroupChatPreview_ db vr user (GroupChatPD _ groupId lastItemId_ stats) = do
   groupInfo <- getGroupInfo db vr user groupId
   lastItem <- case lastItemId_ of
-    Just lastItemId -> (: []) <$> getGroupChatItem db user groupId lastItemId
+    Just lastItemId -> (: []) <$> getGroupCIWithReactions db user groupInfo lastItemId
     Nothing -> pure []
   pure $ AChat SCTGroup (Chat (GroupChat groupInfo) lastItem stats)
 
@@ -855,7 +860,7 @@ getLocalChatPreview_ db user (LocalChatPD _ noteFolderId lastItemId_ stats) = do
 
 -- this function can be changed so it never fails, not only avoid failure on invalid json
 toLocalChatItem :: UTCTime -> ChatItemRow -> Either StoreError (CChatItem 'CTLocal)
-toLocalChatItem currentTs ((itemId, itemTs, AMsgDirection msgDir, itemContentText, itemText, itemStatus, sentViaProxy, sharedMsgId) :. (itemDeleted, deletedTs, itemEdited, createdAt, updatedAt) :. forwardedFromRow :. (timedTTL, timedDeleteAt, itemLive) :. (fileId_, fileName_, fileSize_, filePath, fileKey, fileNonce, fileStatus_, fileProtocol_)) =
+toLocalChatItem currentTs ((itemId, itemTs, AMsgDirection msgDir, itemContentText, itemText, itemStatus, sentViaProxy, sharedMsgId) :. (itemDeleted, deletedTs, itemEdited, createdAt, updatedAt) :. forwardedFromRow :. (timedTTL, timedDeleteAt, itemLive, BI userMention) :. (fileId_, fileName_, fileSize_, filePath, fileKey, fileNonce, fileStatus_, fileProtocol_)) =
   chatItem $ fromRight invalid $ dbParseACIContent itemContentText
   where
     invalid = ACIContent msgDir $ CIInvalidJSON itemContentText
@@ -879,7 +884,7 @@ toLocalChatItem currentTs ((itemId, itemTs, AMsgDirection msgDir, itemContentTex
         _ -> Nothing
     cItem :: MsgDirectionI d => SMsgDirection d -> CIDirection 'CTLocal d -> CIStatus d -> CIContent d -> Maybe (CIFile d) -> CChatItem 'CTLocal
     cItem d chatDir ciStatus content file =
-      CChatItem d ChatItem {chatDir, meta = ciMeta content ciStatus, content, formattedText = parseMaybeMarkdownList itemText, quotedItem = Nothing, reactions = [], file}
+      CChatItem d ChatItem {chatDir, meta = ciMeta content ciStatus, content, mentions = M.empty, formattedText = parseMaybeMarkdownList itemText, quotedItem = Nothing, reactions = [], file}
     badItem = Left $ SEBadChatItem itemId (Just itemTs)
     ciMeta :: CIContent d -> CIStatus d -> CIMeta 'CTLocal d
     ciMeta content status =
@@ -888,7 +893,7 @@ toLocalChatItem currentTs ((itemId, itemTs, AMsgDirection msgDir, itemContentTex
             _ -> Just (CIDeleted @'CTLocal deletedTs)
           itemEdited' = maybe False unBI itemEdited
           itemForwarded = toCIForwardedFrom forwardedFromRow
-       in mkCIMeta itemId content itemText status (unBI <$> sentViaProxy) sharedMsgId itemForwarded itemDeleted' itemEdited' ciTimed (unBI <$> itemLive) currentTs itemTs Nothing createdAt updatedAt
+       in mkCIMeta itemId content itemText status (unBI <$> sentViaProxy) sharedMsgId itemForwarded itemDeleted' itemEdited' ciTimed (unBI <$> itemLive) userMention currentTs itemTs Nothing createdAt updatedAt
     ciTimed :: Maybe CITimed
     ciTimed = timedTTL >>= \ttl -> Just CITimed {ttl, deleteAt = timedDeleteAt}
 
@@ -1021,6 +1026,7 @@ safeToDirectItem currentTs itemId = \case
               { chatDir = CIDirectSnd,
                 meta = dummyMeta itemId ts errorText,
                 content = CIInvalidJSON errorText,
+                mentions = M.empty,
                 formattedText = Nothing,
                 quotedItem = Nothing,
                 reactions = [],
@@ -1276,6 +1282,7 @@ safeToGroupItem currentTs itemId = \case
               { chatDir = CIGroupSnd,
                 meta = dummyMeta itemId ts errorText,
                 content = CIInvalidJSON errorText,
+                mentions = M.empty,
                 formattedText = Nothing,
                 quotedItem = Nothing,
                 reactions = [],
@@ -1501,6 +1508,7 @@ safeToLocalItem currentTs itemId = \case
               { chatDir = CILocalSnd,
                 meta = dummyMeta itemId ts errorText,
                 content = CIInvalidJSON errorText,
+                mentions = M.empty,
                 formattedText = Nothing,
                 quotedItem = Nothing,
                 reactions = [],
@@ -1810,7 +1818,7 @@ updateLocalChatItemsRead db User {userId} noteFolderId = do
 
 type MaybeCIFIleRow = (Maybe Int64, Maybe String, Maybe Integer, Maybe FilePath, Maybe C.SbKey, Maybe C.CbNonce, Maybe ACIFileStatus, Maybe FileProtocol)
 
-type ChatItemModeRow = (Maybe Int, Maybe UTCTime, Maybe BoolInt)
+type ChatItemModeRow = (Maybe Int, Maybe UTCTime, Maybe BoolInt, BoolInt)
 
 type ChatItemForwardedFromRow = (Maybe CIForwardedFromTag, Maybe Text, Maybe MsgDirection, Maybe Int64, Maybe Int64, Maybe Int64)
 
@@ -1834,7 +1842,7 @@ toQuote (quotedItemId, quotedSharedMsgId, quotedSentAt, quotedMsgContent, _) dir
 
 -- this function can be changed so it never fails, not only avoid failure on invalid json
 toDirectChatItem :: UTCTime -> ChatItemRow :. QuoteRow -> Either StoreError (CChatItem 'CTDirect)
-toDirectChatItem currentTs (((itemId, itemTs, AMsgDirection msgDir, itemContentText, itemText, itemStatus, sentViaProxy, sharedMsgId) :. (itemDeleted, deletedTs, itemEdited, createdAt, updatedAt) :. forwardedFromRow :. (timedTTL, timedDeleteAt, itemLive) :. (fileId_, fileName_, fileSize_, filePath, fileKey, fileNonce, fileStatus_, fileProtocol_)) :. quoteRow) =
+toDirectChatItem currentTs (((itemId, itemTs, AMsgDirection msgDir, itemContentText, itemText, itemStatus, sentViaProxy, sharedMsgId) :. (itemDeleted, deletedTs, itemEdited, createdAt, updatedAt) :. forwardedFromRow :. (timedTTL, timedDeleteAt, itemLive, BI userMention) :. (fileId_, fileName_, fileSize_, filePath, fileKey, fileNonce, fileStatus_, fileProtocol_)) :. quoteRow) =
   chatItem $ fromRight invalid $ dbParseACIContent itemContentText
   where
     invalid = ACIContent msgDir $ CIInvalidJSON itemContentText
@@ -1858,7 +1866,7 @@ toDirectChatItem currentTs (((itemId, itemTs, AMsgDirection msgDir, itemContentT
         _ -> Nothing
     cItem :: MsgDirectionI d => SMsgDirection d -> CIDirection 'CTDirect d -> CIStatus d -> CIContent d -> Maybe (CIFile d) -> CChatItem 'CTDirect
     cItem d chatDir ciStatus content file =
-      CChatItem d ChatItem {chatDir, meta = ciMeta content ciStatus, content, formattedText = parseMaybeMarkdownList itemText, quotedItem = toDirectQuote quoteRow, reactions = [], file}
+      CChatItem d ChatItem {chatDir, meta = ciMeta content ciStatus, content, mentions = M.empty, formattedText = parseMaybeMarkdownList itemText, quotedItem = toDirectQuote quoteRow, reactions = [], file}
     badItem = Left $ SEBadChatItem itemId (Just itemTs)
     ciMeta :: CIContent d -> CIStatus d -> CIMeta 'CTDirect d
     ciMeta content status =
@@ -1867,7 +1875,7 @@ toDirectChatItem currentTs (((itemId, itemTs, AMsgDirection msgDir, itemContentT
             _ -> Just (CIDeleted @'CTDirect deletedTs)
           itemEdited' = maybe False unBI itemEdited
           itemForwarded = toCIForwardedFrom forwardedFromRow
-       in mkCIMeta itemId content itemText status (unBI <$> sentViaProxy) sharedMsgId itemForwarded itemDeleted' itemEdited' ciTimed (unBI <$> itemLive) currentTs itemTs Nothing createdAt updatedAt
+       in mkCIMeta itemId content itemText status (unBI <$> sentViaProxy) sharedMsgId itemForwarded itemDeleted' itemEdited' ciTimed (unBI <$> itemLive) userMention currentTs itemTs Nothing createdAt updatedAt
     ciTimed :: Maybe CITimed
     ciTimed = timedTTL >>= \ttl -> Just CITimed {ttl, deleteAt = timedDeleteAt}
 
@@ -1891,7 +1899,7 @@ toGroupQuote qr@(_, _, _, _, quotedSent) quotedMember_ = toQuote qr $ direction
 
 -- this function can be changed so it never fails, not only avoid failure on invalid json
 toGroupChatItem :: UTCTime -> Int64 -> ChatItemRow :. Only (Maybe GroupMemberId) :. MaybeGroupMemberRow :. GroupQuoteRow :. MaybeGroupMemberRow -> Either StoreError (CChatItem 'CTGroup)
-toGroupChatItem currentTs userContactId (((itemId, itemTs, AMsgDirection msgDir, itemContentText, itemText, itemStatus, sentViaProxy, sharedMsgId) :. (itemDeleted, deletedTs, itemEdited, createdAt, updatedAt) :. forwardedFromRow :. (timedTTL, timedDeleteAt, itemLive) :. (fileId_, fileName_, fileSize_, filePath, fileKey, fileNonce, fileStatus_, fileProtocol_)) :. Only forwardedByMember :. memberRow_ :. (quoteRow :. quotedMemberRow_) :. deletedByGroupMemberRow_) = do
+toGroupChatItem currentTs userContactId (((itemId, itemTs, AMsgDirection msgDir, itemContentText, itemText, itemStatus, sentViaProxy, sharedMsgId) :. (itemDeleted, deletedTs, itemEdited, createdAt, updatedAt) :. forwardedFromRow :. (timedTTL, timedDeleteAt, itemLive, BI userMention) :. (fileId_, fileName_, fileSize_, filePath, fileKey, fileNonce, fileStatus_, fileProtocol_)) :. Only forwardedByMember :. memberRow_ :. (quoteRow :. quotedMemberRow_) :. deletedByGroupMemberRow_) = do
   chatItem $ fromRight invalid $ dbParseACIContent itemContentText
   where
     member_ = toMaybeGroupMember userContactId memberRow_
@@ -1918,7 +1926,7 @@ toGroupChatItem currentTs userContactId (((itemId, itemTs, AMsgDirection msgDir,
         _ -> Nothing
     cItem :: MsgDirectionI d => SMsgDirection d -> CIDirection 'CTGroup d -> CIStatus d -> CIContent d -> Maybe (CIFile d) -> CChatItem 'CTGroup
     cItem d chatDir ciStatus content file =
-      CChatItem d ChatItem {chatDir, meta = ciMeta content ciStatus, content, formattedText = parseMaybeMarkdownList itemText, quotedItem = toGroupQuote quoteRow quotedMember_, reactions = [], file}
+      CChatItem d ChatItem {chatDir, meta = ciMeta content ciStatus, content, mentions = M.empty, formattedText = parseMaybeMarkdownList itemText, quotedItem = toGroupQuote quoteRow quotedMember_, reactions = [], file}
     badItem = Left $ SEBadChatItem itemId (Just itemTs)
     ciMeta :: CIContent d -> CIStatus d -> CIMeta 'CTGroup d
     ciMeta content status =
@@ -1929,7 +1937,7 @@ toGroupChatItem currentTs userContactId (((itemId, itemTs, AMsgDirection msgDir,
             _ -> Just (maybe (CIDeleted @'CTGroup deletedTs) (CIModerated deletedTs) deletedByGroupMember_)
           itemEdited' = maybe False unBI itemEdited
           itemForwarded = toCIForwardedFrom forwardedFromRow
-       in mkCIMeta itemId content itemText status (unBI <$> sentViaProxy) sharedMsgId itemForwarded itemDeleted' itemEdited' ciTimed (unBI <$> itemLive) currentTs itemTs forwardedByMember createdAt updatedAt
+       in mkCIMeta itemId content itemText status (unBI <$> sentViaProxy) sharedMsgId itemForwarded itemDeleted' itemEdited' ciTimed (unBI <$> itemLive) userMention currentTs itemTs forwardedByMember createdAt updatedAt
     ciTimed :: Maybe CITimed
     ciTimed = timedTTL >>= \ttl -> Just CITimed {ttl, deleteAt = timedDeleteAt}
 
@@ -2202,7 +2210,7 @@ getDirectChatItem db User {userId} contactId itemId = ExceptT $ do
             i.chat_item_id, i.item_ts, i.item_sent, i.item_content, i.item_text, i.item_status, i.via_proxy, i.shared_msg_id,
             i.item_deleted, i.item_deleted_ts, i.item_edited, i.created_at, i.updated_at,
             i.fwd_from_tag, i.fwd_from_chat_name, i.fwd_from_msg_dir, i.fwd_from_contact_id, i.fwd_from_group_id, i.fwd_from_chat_item_id,
-            i.timed_ttl, i.timed_delete_at, i.item_live,
+            i.timed_ttl, i.timed_delete_at, i.item_live, i.user_mention,
             -- CIFile
             f.file_id, f.file_name, f.file_size, f.file_path, f.file_crypto_key, f.file_crypto_nonce, f.ci_file_status, f.protocol,
             -- DirectQuote
@@ -2254,12 +2262,14 @@ getGroupCIWithReactions db user g@GroupInfo {groupId} itemId = do
   liftIO . groupCIWithReactions db g =<< getGroupChatItem db user groupId itemId
 
 groupCIWithReactions :: DB.Connection -> GroupInfo -> CChatItem 'CTGroup -> IO (CChatItem 'CTGroup)
-groupCIWithReactions db g cci@(CChatItem md ci@ChatItem {meta = CIMeta {itemSharedMsgId}}) = case itemSharedMsgId of
-  Just sharedMsgId -> do
-    let GroupMember {memberId} = chatItemMember g ci
-    reactions <- getGroupCIReactions db g memberId sharedMsgId
-    pure $ CChatItem md ci {reactions}
-  Nothing -> pure cci
+groupCIWithReactions db g cci@(CChatItem md ci@ChatItem {meta = CIMeta {itemId, itemSharedMsgId}}) = do
+  mentions <- getGroupCIMentions db itemId
+  case itemSharedMsgId of
+    Just sharedMsgId -> do
+      let GroupMember {memberId} = chatItemMember g ci
+      reactions <- getGroupCIReactions db g memberId sharedMsgId
+      pure $ CChatItem md ci {reactions, mentions}
+    Nothing -> pure $ if null mentions then cci else CChatItem md ci {mentions}
 
 updateGroupChatItem :: MsgDirectionI d => DB.Connection -> User -> Int64 -> ChatItem 'CTGroup d -> CIContent d -> Bool -> Bool -> Maybe MessageId -> IO (ChatItem 'CTGroup d)
 updateGroupChatItem db user groupId ci newContent edited live msgId_ = do
@@ -2285,6 +2295,25 @@ updateGroupChatItem_ db User {userId} groupId ChatItem {content, meta} msgId_ =
     ((content, itemText, itemStatus, BI itemDeleted', itemDeletedTs', BI itemEdited, BI <$> itemLive, updatedAt) :. ciTimedRow itemTimed :. (userId, groupId, itemId))
   forM_ msgId_ $ \msgId -> insertChatItemMessage_ db itemId msgId updatedAt
 
+createGroupCIMentions :: forall d. DB.Connection -> GroupInfo -> ChatItem 'CTGroup d -> Map MemberName MentionedMember -> IO (ChatItem 'CTGroup d)
+createGroupCIMentions db GroupInfo {groupId} ci mentions = do
+  DB.executeMany db "INSERT INTO chat_item_mentions (chat_item_id, group_id, member_id, display_name) VALUES (?, ?, ?, ?)" rows
+  pure (ci :: ChatItem 'CTGroup d) {mentions}
+  where
+    rows = map (\(name, MentionedMember {memberId}) -> (ciId, groupId, memberId, name)) $ M.assocs mentions
+    ciId = chatItemId' ci
+
+updateGroupCIMentions :: DB.Connection -> GroupInfo -> ChatItem 'CTGroup d -> Map MemberName MentionedMember -> IO (ChatItem 'CTGroup d)
+updateGroupCIMentions db g ci@ChatItem {mentions} mentions'
+  | mentions' == mentions = pure ci
+  | otherwise = do
+      unless (null mentions) $ deleteMentions
+      if null mentions'
+        then pure ci
+        else createGroupCIMentions db g ci mentions'
+  where
+    deleteMentions = DB.execute db "DELETE FROM chat_item_mentions WHERE chat_item_id = ?" (Only $ chatItemId' ci)
+
 deleteGroupChatItem :: DB.Connection -> User -> GroupInfo -> ChatItem 'CTGroup d -> IO ()
 deleteGroupChatItem db User {userId} g@GroupInfo {groupId} ci = do
   let itemId = chatItemId' ci
@@ -2458,7 +2487,7 @@ getGroupChatItem db User {userId, userContactId} groupId itemId = ExceptT $ do
             i.chat_item_id, i.item_ts, i.item_sent, i.item_content, i.item_text, i.item_status, i.via_proxy, i.shared_msg_id,
             i.item_deleted, i.item_deleted_ts, i.item_edited, i.created_at, i.updated_at,
             i.fwd_from_tag, i.fwd_from_chat_name, i.fwd_from_msg_dir, i.fwd_from_contact_id, i.fwd_from_group_id, i.fwd_from_chat_item_id,
-            i.timed_ttl, i.timed_delete_at, i.item_live,
+            i.timed_ttl, i.timed_delete_at, i.item_live, i.user_mention,
             -- CIFile
             f.file_id, f.file_name, f.file_size, f.file_path, f.file_crypto_key, f.file_crypto_nonce, f.ci_file_status, f.protocol,
             -- CIMeta forwardedByMember
@@ -2562,7 +2591,7 @@ getLocalChatItem db User {userId} folderId itemId = ExceptT $ do
             i.chat_item_id, i.item_ts, i.item_sent, i.item_content, i.item_text, i.item_status, i.via_proxy, i.shared_msg_id,
             i.item_deleted, i.item_deleted_ts, i.item_edited, i.created_at, i.updated_at,
             i.fwd_from_tag, i.fwd_from_chat_name, i.fwd_from_msg_dir, i.fwd_from_contact_id, i.fwd_from_group_id, i.fwd_from_chat_item_id,
-            i.timed_ttl, i.timed_delete_at, i.item_live,
+            i.timed_ttl, i.timed_delete_at, i.item_live, i.user_mention,
             -- CIFile
             f.file_id, f.file_name, f.file_size, f.file_path, f.file_crypto_key, f.file_crypto_nonce, f.ci_file_status, f.protocol
           FROM chat_items i
@@ -2760,6 +2789,28 @@ getGroupCIReactions db GroupInfo {groupId} itemMemberId itemSharedMsgId =
       |]
       (groupId, itemMemberId, itemSharedMsgId)
 
+getGroupCIMentions :: DB.Connection -> ChatItemId -> IO (Map MemberName MentionedMember)
+getGroupCIMentions db ciId =
+  M.fromList . map mentionedMember
+    <$> DB.query
+      db
+      [sql|
+        SELECT r.display_name, r.member_id, m.group_member_id, m.member_role, p.display_name, p.local_alias
+        FROM chat_item_mentions r
+        LEFT JOIN group_members m ON r.group_id = m.group_id AND r.member_id = m.member_id
+        LEFT JOIN contact_profiles p ON p.contact_profile_id = COALESCE(m.member_profile_id, m.contact_profile_id) 
+        WHERE r.chat_item_id = ?
+      |]
+      (Only ciId)
+  where
+    mentionedMember :: (ContactName, MemberId, Maybe GroupMemberId, Maybe GroupMemberRole, Maybe Text, Maybe Text) -> (ContactName, MentionedMember)
+    mentionedMember (name, memberId, gmId_, mRole_, displayName_, localAlias) =
+      let memberRef = case (gmId_, mRole_, displayName_) of
+            (Just groupMemberId, Just memberRole, Just displayName) ->
+              Just MentionedMemberInfo {groupMemberId, displayName, localAlias, memberRole}
+            _ -> Nothing
+       in (name, MentionedMember {memberId, memberRef})
+
 getACIReactions :: DB.Connection -> AChatItem -> IO AChatItem
 getACIReactions db aci@(AChatItem _ md chat ci@ChatItem {meta = CIMeta {itemSharedMsgId}}) = case itemSharedMsgId of
   Just itemSharedMId -> case chat of
diff --git a/src/Simplex/Chat/Store/Postgres/Migrations/M20241220_initial.hs b/src/Simplex/Chat/Store/Postgres/Migrations/M20241220_initial.hs
index 60a2ace8f3..48d35b23d2 100644
--- a/src/Simplex/Chat/Store/Postgres/Migrations/M20241220_initial.hs
+++ b/src/Simplex/Chat/Store/Postgres/Migrations/M20241220_initial.hs
@@ -426,7 +426,8 @@ CREATE TABLE chat_items(
   fwd_from_chat_item_id BIGINT REFERENCES chat_items ON DELETE SET NULL,
   via_proxy SMALLINT,
   msg_content_tag TEXT,
-  include_in_history SMALLINT NOT NULL DEFAULT 0
+  include_in_history SMALLINT NOT NULL DEFAULT 0,
+  user_mention SMALLINT NOT NULL DEFAULT 0
 );
 ALTER TABLE groups
 ADD CONSTRAINT fk_groups_chat_items
@@ -676,6 +677,13 @@ CREATE TABLE chat_tags_chats(
   group_id BIGINT REFERENCES groups ON DELETE CASCADE,
   chat_tag_id BIGINT NOT NULL REFERENCES chat_tags ON DELETE CASCADE
 );
+CREATE TABLE chat_item_mentions (
+  chat_item_mention_id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+  chat_item_id BIGINT NOT NULL REFERENCES chat_items ON DELETE CASCADE,
+  group_id BIGINT NOT NULL REFERENCES groups ON DELETE CASCADE,
+  member_id BYTEA NOT NULL,
+  display_name TEXT NOT NULL
+);
 CREATE INDEX contact_profiles_index ON contact_profiles(
   display_name,
   full_name
@@ -1025,4 +1033,8 @@ CREATE INDEX idx_group_snd_item_statuses_chat_item_id_group_member_id ON group_s
   chat_item_id,
   group_member_id
 );
+CREATE INDEX idx_chat_item_mentions_group_id ON chat_item_mentions(group_id);
+CREATE INDEX idx_chat_item_mentions_chat_item_id ON chat_item_mentions(chat_item_id);
+CREATE UNIQUE INDEX idx_chat_item_mentions_display_name ON chat_item_mentions(chat_item_id, display_name);
+CREATE UNIQUE INDEX idx_chat_item_mentions_member_id ON chat_item_mentions(chat_item_id, member_id);
 |]
diff --git a/src/Simplex/Chat/Store/SQLite/Migrations.hs b/src/Simplex/Chat/Store/SQLite/Migrations.hs
index c4d4237f98..29dab148dc 100644
--- a/src/Simplex/Chat/Store/SQLite/Migrations.hs
+++ b/src/Simplex/Chat/Store/SQLite/Migrations.hs
@@ -125,6 +125,7 @@ import Simplex.Chat.Store.SQLite.Migrations.M20241230_reports
 import Simplex.Chat.Store.SQLite.Migrations.M20250105_indexes
 import Simplex.Chat.Store.SQLite.Migrations.M20250115_chat_ttl
 import Simplex.Chat.Store.SQLite.Migrations.M20250122_chat_items_include_in_history
+import Simplex.Chat.Store.SQLite.Migrations.M20250126_mentions
 import Simplex.Messaging.Agent.Store.Shared (Migration (..))
 
 schemaMigrations :: [(String, Query, Maybe Query)]
@@ -249,7 +250,8 @@ schemaMigrations =
     ("20241230_reports", m20241230_reports, Just down_m20241230_reports),
     ("20250105_indexes", m20250105_indexes, Just down_m20250105_indexes),
     ("20250115_chat_ttl", m20250115_chat_ttl, Just down_m20250115_chat_ttl),
-    ("20250122_chat_items_include_in_history", m20250122_chat_items_include_in_history, Just down_m20250122_chat_items_include_in_history)
+    ("20250122_chat_items_include_in_history", m20250122_chat_items_include_in_history, Just down_m20250122_chat_items_include_in_history),
+    ("20250126_mentions", m20250126_mentions, Just down_m20250126_mentions)
   ]
 
 -- | The list of migrations in ascending order by date
diff --git a/src/Simplex/Chat/Store/SQLite/Migrations/M20250126_mentions.hs b/src/Simplex/Chat/Store/SQLite/Migrations/M20250126_mentions.hs
new file mode 100644
index 0000000000..f5f5e24fe0
--- /dev/null
+++ b/src/Simplex/Chat/Store/SQLite/Migrations/M20250126_mentions.hs
@@ -0,0 +1,37 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Simplex.Chat.Store.SQLite.Migrations.M20250126_mentions where
+
+import Database.SQLite.Simple (Query)
+import Database.SQLite.Simple.QQ (sql)
+
+m20250126_mentions :: Query
+m20250126_mentions =
+  [sql|
+ALTER TABLE chat_items ADD COLUMN user_mention INTEGER NOT NULL DEFAULT 0;
+
+CREATE TABLE chat_item_mentions (
+  chat_item_mention_id INTEGER PRIMARY KEY AUTOINCREMENT,
+  group_id INTEGER NOT NULL REFERENCES groups ON DELETE CASCADE,
+  member_id BLOB NOT NULL,
+  chat_item_id INTEGER NOT NULL REFERENCES chat_items ON DELETE CASCADE,
+  display_name TEXT NOT NULL
+);
+
+CREATE INDEX idx_chat_item_mentions_group_id ON chat_item_mentions(group_id);
+CREATE INDEX idx_chat_item_mentions_chat_item_id ON chat_item_mentions(chat_item_id);
+CREATE UNIQUE INDEX idx_chat_item_mentions_display_name ON chat_item_mentions(chat_item_id, display_name);
+CREATE UNIQUE INDEX idx_chat_item_mentions_member_id ON chat_item_mentions(chat_item_id, member_id);
+|]
+
+down_m20250126_mentions :: Query
+down_m20250126_mentions =
+  [sql|
+DROP INDEX idx_chat_item_mentions_group_id;
+DROP INDEX idx_chat_item_mentions_chat_item_id;
+DROP INDEX idx_chat_item_mentions_display_name;
+DROP INDEX idx_chat_item_mentions_member_id;
+
+DROP TABLE chat_item_mentions;
+ALTER TABLE chat_items DROP COLUMN user_mention;
+|]
diff --git a/src/Simplex/Chat/Store/SQLite/Migrations/chat_query_plans.txt b/src/Simplex/Chat/Store/SQLite/Migrations/chat_query_plans.txt
index a58775429d..f9c19d31b5 100644
--- a/src/Simplex/Chat/Store/SQLite/Migrations/chat_query_plans.txt
+++ b/src/Simplex/Chat/Store/SQLite/Migrations/chat_query_plans.txt
@@ -714,7 +714,7 @@ Query:
             i.chat_item_id, i.item_ts, i.item_sent, i.item_content, i.item_text, i.item_status, i.via_proxy, i.shared_msg_id,
             i.item_deleted, i.item_deleted_ts, i.item_edited, i.created_at, i.updated_at,
             i.fwd_from_tag, i.fwd_from_chat_name, i.fwd_from_msg_dir, i.fwd_from_contact_id, i.fwd_from_group_id, i.fwd_from_chat_item_id,
-            i.timed_ttl, i.timed_delete_at, i.item_live,
+            i.timed_ttl, i.timed_delete_at, i.item_live, i.user_mention,
             -- CIFile
             f.file_id, f.file_name, f.file_size, f.file_path, f.file_crypto_key, f.file_crypto_nonce, f.ci_file_status, f.protocol
           FROM chat_items i
@@ -731,7 +731,7 @@ Query:
             i.chat_item_id, i.item_ts, i.item_sent, i.item_content, i.item_text, i.item_status, i.via_proxy, i.shared_msg_id,
             i.item_deleted, i.item_deleted_ts, i.item_edited, i.created_at, i.updated_at,
             i.fwd_from_tag, i.fwd_from_chat_name, i.fwd_from_msg_dir, i.fwd_from_contact_id, i.fwd_from_group_id, i.fwd_from_chat_item_id,
-            i.timed_ttl, i.timed_delete_at, i.item_live,
+            i.timed_ttl, i.timed_delete_at, i.item_live, i.user_mention,
             -- CIFile
             f.file_id, f.file_name, f.file_size, f.file_path, f.file_crypto_key, f.file_crypto_nonce, f.ci_file_status, f.protocol,
             -- CIMeta forwardedByMember
@@ -778,7 +778,7 @@ Query:
             i.chat_item_id, i.item_ts, i.item_sent, i.item_content, i.item_text, i.item_status, i.via_proxy, i.shared_msg_id,
             i.item_deleted, i.item_deleted_ts, i.item_edited, i.created_at, i.updated_at,
             i.fwd_from_tag, i.fwd_from_chat_name, i.fwd_from_msg_dir, i.fwd_from_contact_id, i.fwd_from_group_id, i.fwd_from_chat_item_id,
-            i.timed_ttl, i.timed_delete_at, i.item_live,
+            i.timed_ttl, i.timed_delete_at, i.item_live, i.user_mention,
             -- CIFile
             f.file_id, f.file_name, f.file_size, f.file_path, f.file_crypto_key, f.file_crypto_nonce, f.ci_file_status, f.protocol,
             -- DirectQuote
@@ -3295,6 +3295,18 @@ SEARCH r USING INDEX idx_received_probes_user_id (user_id=?)
 SEARCH m USING INTEGER PRIMARY KEY (rowid=?) LEFT-JOIN
 SEARCH g USING INTEGER PRIMARY KEY (rowid=?) LEFT-JOIN
 
+Query: 
+        SELECT r.display_name, r.member_id, m.group_member_id, m.member_role, p.display_name, p.local_alias
+        FROM chat_item_mentions r
+        LEFT JOIN group_members m ON r.group_id = m.group_id AND r.member_id = m.member_id
+        LEFT JOIN contact_profiles p ON p.contact_profile_id = COALESCE(m.member_profile_id, m.contact_profile_id) 
+        WHERE r.chat_item_id = ?
+      
+Plan:
+SEARCH r USING INDEX idx_chat_item_mentions_chat_item_id (chat_item_id=?)
+SEARCH m USING INDEX sqlite_autoindex_group_members_1 (group_id=? AND member_id=?) LEFT-JOIN
+SEARCH p USING INTEGER PRIMARY KEY (rowid=?) LEFT-JOIN
+
 Query: 
         SELECT re_group_member_id
         FROM group_member_intros
@@ -3489,6 +3501,7 @@ Query:
     
 Plan:
 SEARCH chat_items USING INTEGER PRIMARY KEY (rowid=?)
+SEARCH chat_item_mentions USING COVERING INDEX idx_chat_item_mentions_chat_item_id (chat_item_id=?)
 SEARCH group_snd_item_statuses USING COVERING INDEX idx_group_snd_item_statuses_chat_item_id (chat_item_id=?)
 SEARCH chat_item_versions USING COVERING INDEX idx_chat_item_versions_chat_item_id (chat_item_id=?)
 SEARCH calls USING COVERING INDEX idx_calls_chat_item_id (chat_item_id=?)
@@ -3503,6 +3516,7 @@ Query:
     
 Plan:
 SEARCH chat_items USING INTEGER PRIMARY KEY (rowid=?)
+SEARCH chat_item_mentions USING COVERING INDEX idx_chat_item_mentions_chat_item_id (chat_item_id=?)
 SEARCH group_snd_item_statuses USING COVERING INDEX idx_group_snd_item_statuses_chat_item_id (chat_item_id=?)
 SEARCH chat_item_versions USING COVERING INDEX idx_chat_item_versions_chat_item_id (chat_item_id=?)
 SEARCH calls USING COVERING INDEX idx_calls_chat_item_id (chat_item_id=?)
@@ -3517,6 +3531,7 @@ Query:
     
 Plan:
 SEARCH chat_items USING INTEGER PRIMARY KEY (rowid=?)
+SEARCH chat_item_mentions USING COVERING INDEX idx_chat_item_mentions_chat_item_id (chat_item_id=?)
 SEARCH group_snd_item_statuses USING COVERING INDEX idx_group_snd_item_statuses_chat_item_id (chat_item_id=?)
 SEARCH chat_item_versions USING COVERING INDEX idx_chat_item_versions_chat_item_id (chat_item_id=?)
 SEARCH calls USING COVERING INDEX idx_calls_chat_item_id (chat_item_id=?)
@@ -3964,12 +3979,12 @@ Query:
         user_id, created_by_msg_id, contact_id, group_id, group_member_id, note_folder_id,
         -- meta
         item_sent, item_ts, item_content, item_content_tag, item_text, item_status, msg_content_tag, shared_msg_id,
-        forwarded_by_group_member_id, include_in_history, created_at, updated_at, item_live, timed_ttl, timed_delete_at,
+        forwarded_by_group_member_id, include_in_history, created_at, updated_at, item_live, user_mention, timed_ttl, timed_delete_at,
         -- quote
         quoted_shared_msg_id, quoted_sent_at, quoted_content, quoted_sent, quoted_member_id,
         -- forwarded from
         fwd_from_tag, fwd_from_chat_name, fwd_from_msg_dir, fwd_from_contact_id, fwd_from_group_id, fwd_from_chat_item_id
-      ) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)
+      ) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)
     
 Plan:
 
@@ -4690,6 +4705,24 @@ Plan:
 SEARCH i USING COVERING INDEX idx_chat_items_notes_created_at (user_id=? AND note_folder_id=?)
 SEARCH f USING INDEX idx_files_chat_item_id (chat_item_id=?)
 
+Query: 
+    SELECT m.group_member_id, m.member_id, m.member_role, p.display_name, p.local_alias
+    FROM group_members m
+    JOIN contact_profiles p ON p.contact_profile_id = COALESCE(m.member_profile_id, m.contact_profile_id)
+   WHERE m.group_id = ? AND m.group_member_id = ? AND m.user_id = ?
+Plan:
+SEARCH m USING INTEGER PRIMARY KEY (rowid=?)
+SEARCH p USING INTEGER PRIMARY KEY (rowid=?)
+
+Query: 
+    SELECT m.group_member_id, m.member_id, m.member_role, p.display_name, p.local_alias
+    FROM group_members m
+    JOIN contact_profiles p ON p.contact_profile_id = COALESCE(m.member_profile_id, m.contact_profile_id)
+   WHERE m.group_id = ? AND m.member_id = ? AND m.user_id = ?
+Plan:
+SEARCH m USING INDEX sqlite_autoindex_group_members_1 (group_id=? AND member_id=?)
+SEARCH p USING INTEGER PRIMARY KEY (rowid=?)
+
 Query: 
     SELECT remote_ctrl_id, ctrl_device_name, ca_key, ca_cert, ctrl_fingerprint, id_pub, dh_priv_key, prev_dh_priv_key
     FROM remote_controllers
@@ -4957,6 +4990,7 @@ SEARCH chat_item_versions USING COVERING INDEX idx_chat_item_versions_chat_item_
 Query: DELETE FROM chat_items WHERE user_id = ? AND contact_id = ?
 Plan:
 SEARCH chat_items USING COVERING INDEX idx_chat_items_contacts_created_at (user_id=? AND contact_id=?)
+SEARCH chat_item_mentions USING COVERING INDEX idx_chat_item_mentions_chat_item_id (chat_item_id=?)
 SEARCH group_snd_item_statuses USING COVERING INDEX idx_group_snd_item_statuses_chat_item_id (chat_item_id=?)
 SEARCH chat_item_versions USING COVERING INDEX idx_chat_item_versions_chat_item_id (chat_item_id=?)
 SEARCH calls USING COVERING INDEX idx_calls_chat_item_id (chat_item_id=?)
@@ -4968,6 +5002,7 @@ SEARCH groups USING COVERING INDEX idx_groups_chat_item_id (chat_item_id=?)
 Query: DELETE FROM chat_items WHERE user_id = ? AND contact_id = ? AND created_at <= ?
 Plan:
 SEARCH chat_items USING COVERING INDEX idx_chat_items_contacts_created_at (user_id=? AND contact_id=? AND created_at<?)
+SEARCH chat_item_mentions USING COVERING INDEX idx_chat_item_mentions_chat_item_id (chat_item_id=?)
 SEARCH group_snd_item_statuses USING COVERING INDEX idx_group_snd_item_statuses_chat_item_id (chat_item_id=?)
 SEARCH chat_item_versions USING COVERING INDEX idx_chat_item_versions_chat_item_id (chat_item_id=?)
 SEARCH calls USING COVERING INDEX idx_calls_chat_item_id (chat_item_id=?)
@@ -4979,6 +5014,7 @@ SEARCH groups USING COVERING INDEX idx_groups_chat_item_id (chat_item_id=?)
 Query: DELETE FROM chat_items WHERE user_id = ? AND group_id = ?
 Plan:
 SEARCH chat_items USING COVERING INDEX idx_chat_items_groups_item_ts (user_id=? AND group_id=?)
+SEARCH chat_item_mentions USING COVERING INDEX idx_chat_item_mentions_chat_item_id (chat_item_id=?)
 SEARCH group_snd_item_statuses USING COVERING INDEX idx_group_snd_item_statuses_chat_item_id (chat_item_id=?)
 SEARCH chat_item_versions USING COVERING INDEX idx_chat_item_versions_chat_item_id (chat_item_id=?)
 SEARCH calls USING COVERING INDEX idx_calls_chat_item_id (chat_item_id=?)
@@ -4990,6 +5026,7 @@ SEARCH groups USING COVERING INDEX idx_groups_chat_item_id (chat_item_id=?)
 Query: DELETE FROM chat_items WHERE user_id = ? AND group_id = ? AND group_member_id = ?
 Plan:
 SEARCH chat_items USING COVERING INDEX idx_chat_items_group_shared_msg_id (user_id=? AND group_id=? AND group_member_id=?)
+SEARCH chat_item_mentions USING COVERING INDEX idx_chat_item_mentions_chat_item_id (chat_item_id=?)
 SEARCH group_snd_item_statuses USING COVERING INDEX idx_group_snd_item_statuses_chat_item_id (chat_item_id=?)
 SEARCH chat_item_versions USING COVERING INDEX idx_chat_item_versions_chat_item_id (chat_item_id=?)
 SEARCH calls USING COVERING INDEX idx_calls_chat_item_id (chat_item_id=?)
@@ -5001,6 +5038,7 @@ SEARCH groups USING COVERING INDEX idx_groups_chat_item_id (chat_item_id=?)
 Query: DELETE FROM chat_items WHERE user_id = ? AND note_folder_id = ?
 Plan:
 SEARCH chat_items USING COVERING INDEX idx_chat_items_notes_created_at (user_id=? AND note_folder_id=?)
+SEARCH chat_item_mentions USING COVERING INDEX idx_chat_item_mentions_chat_item_id (chat_item_id=?)
 SEARCH group_snd_item_statuses USING COVERING INDEX idx_group_snd_item_statuses_chat_item_id (chat_item_id=?)
 SEARCH chat_item_versions USING COVERING INDEX idx_chat_item_versions_chat_item_id (chat_item_id=?)
 SEARCH calls USING COVERING INDEX idx_calls_chat_item_id (chat_item_id=?)
@@ -5155,6 +5193,7 @@ SEARCH contacts USING COVERING INDEX idx_contacts_contact_group_member_id (conta
 Query: DELETE FROM groups WHERE user_id = ? AND group_id = ?
 Plan:
 SEARCH groups USING INTEGER PRIMARY KEY (rowid=?)
+SEARCH chat_item_mentions USING COVERING INDEX idx_chat_item_mentions_group_id (group_id=?)
 SEARCH chat_tags_chats USING COVERING INDEX idx_chat_tags_chats_chat_tag_id_group_id (group_id=?)
 SEARCH chat_item_moderations USING COVERING INDEX idx_chat_item_moderations_group_id (group_id=?)
 SEARCH chat_item_reactions USING COVERING INDEX idx_chat_item_reactions_group_id (group_id=?)
@@ -5293,6 +5332,9 @@ Plan:
 Query: INSERT INTO app_settings (app_settings) VALUES (?)
 Plan:
 
+Query: INSERT INTO chat_item_mentions (chat_item_id, group_id, member_id, display_name) VALUES (?, ?, ?, ?)
+Plan:
+
 Query: INSERT INTO chat_item_messages (chat_item_id, message_id, created_at, updated_at) VALUES (?,?,?,?)
 Plan:
 
diff --git a/src/Simplex/Chat/Store/SQLite/Migrations/chat_schema.sql b/src/Simplex/Chat/Store/SQLite/Migrations/chat_schema.sql
index 0fef1b43d2..b1bdecd1e4 100644
--- a/src/Simplex/Chat/Store/SQLite/Migrations/chat_schema.sql
+++ b/src/Simplex/Chat/Store/SQLite/Migrations/chat_schema.sql
@@ -407,7 +407,8 @@ CREATE TABLE chat_items(
   fwd_from_chat_item_id INTEGER REFERENCES chat_items ON DELETE SET NULL,
   via_proxy INTEGER,
   msg_content_tag TEXT,
-  include_in_history INTEGER NOT NULL DEFAULT 0
+  include_in_history INTEGER NOT NULL DEFAULT 0,
+  user_mention INTEGER NOT NULL DEFAULT 0
 );
 CREATE TABLE sqlite_sequence(name,seq);
 CREATE TABLE chat_item_messages(
@@ -642,6 +643,13 @@ CREATE TABLE chat_tags_chats(
   group_id INTEGER REFERENCES groups ON DELETE CASCADE,
   chat_tag_id INTEGER NOT NULL REFERENCES chat_tags ON DELETE CASCADE
 );
+CREATE TABLE chat_item_mentions(
+  chat_item_mention_id INTEGER PRIMARY KEY AUTOINCREMENT,
+  group_id INTEGER NOT NULL REFERENCES groups ON DELETE CASCADE,
+  member_id BLOB NOT NULL,
+  chat_item_id INTEGER NOT NULL REFERENCES chat_items ON DELETE CASCADE,
+  display_name TEXT NOT NULL
+);
 CREATE INDEX contact_profiles_index ON contact_profiles(
   display_name,
   full_name
@@ -991,3 +999,15 @@ CREATE INDEX idx_group_snd_item_statuses_chat_item_id_group_member_id ON group_s
   chat_item_id,
   group_member_id
 );
+CREATE INDEX idx_chat_item_mentions_group_id ON chat_item_mentions(group_id);
+CREATE INDEX idx_chat_item_mentions_chat_item_id ON chat_item_mentions(
+  chat_item_id
+);
+CREATE UNIQUE INDEX idx_chat_item_mentions_display_name ON chat_item_mentions(
+  chat_item_id,
+  display_name
+);
+CREATE UNIQUE INDEX idx_chat_item_mentions_member_id ON chat_item_mentions(
+  chat_item_id,
+  member_id
+);
diff --git a/src/Simplex/Chat/Store/Shared.hs b/src/Simplex/Chat/Store/Shared.hs
index fab4c344bf..5a50ae25d3 100644
--- a/src/Simplex/Chat/Store/Shared.hs
+++ b/src/Simplex/Chat/Store/Shared.hs
@@ -140,6 +140,8 @@ data StoreError
   | SEProhibitedDeleteUser {userId :: UserId, contactId :: ContactId}
   | SEOperatorNotFound {serverOperatorId :: Int64}
   | SEUsageConditionsNotFound
+  | SEInvalidQuote
+  | SEInvalidMention
   deriving (Show, Exception)
 
 $(J.deriveJSON (sumTypeJSON $ dropPrefix "SE") ''StoreError)
diff --git a/src/Simplex/Chat/Terminal/Output.hs b/src/Simplex/Chat/Terminal/Output.hs
index 6c914c7c6d..3694b20c67 100644
--- a/src/Simplex/Chat/Terminal/Output.hs
+++ b/src/Simplex/Chat/Terminal/Output.hs
@@ -161,7 +161,7 @@ runTerminalOutput ct cc@ChatController {outputQ, showLiveItems, logFilePath} Cha
     responseNotification ct cc r
   where
     markChatItemRead u (AChatItem _ _ chat ci@ChatItem {chatDir, meta = CIMeta {itemStatus}}) =
-      case (chatDirNtf u chat chatDir (isMention ci), itemStatus) of
+      case (chatDirNtf u chat chatDir (isUserMention ci), itemStatus) of
         (True, CISRcvNew) -> do
           let itemId = chatItemId' ci
               chatRef = chatInfoToRef chat
@@ -178,7 +178,7 @@ responseNotification :: ChatTerminal -> ChatController -> ChatResponse -> IO ()
 responseNotification t@ChatTerminal {sendNotification} cc = \case
   -- At the moment of writing received items are created one at a time
   CRNewChatItems u ((AChatItem _ SMDRcv cInfo ci@ChatItem {chatDir, content = CIRcvMsgContent mc, formattedText}) : _) ->
-    when (chatDirNtf u cInfo chatDir $ isMention ci) $ do
+    when (chatDirNtf u cInfo chatDir $ isUserMention ci) $ do
       whenCurrUser cc u $ setActiveChat t cInfo
       case (cInfo, chatDir) of
         (DirectChat ct, _) -> sendNtf (viewContactName ct <> "> ", text)
@@ -187,7 +187,7 @@ responseNotification t@ChatTerminal {sendNotification} cc = \case
     where
       text = msgText mc formattedText
   CRChatItemUpdated u (AChatItem _ SMDRcv cInfo ci@ChatItem {chatDir, content = CIRcvMsgContent _}) ->
-    whenCurrUser cc u $ when (chatDirNtf u cInfo chatDir $ isMention ci) $ setActiveChat t cInfo
+    whenCurrUser cc u $ when (chatDirNtf u cInfo chatDir $ isUserMention ci) $ setActiveChat t cInfo
   CRContactConnected u ct _ -> when (contactNtf u ct False) $ do
     whenCurrUser cc u $ setActiveContact t ct
     sendNtf (viewContactName ct <> "> ", "connected")
diff --git a/src/Simplex/Chat/Types.hs b/src/Simplex/Chat/Types.hs
index d137e54d23..9c425c059b 100644
--- a/src/Simplex/Chat/Types.hs
+++ b/src/Simplex/Chat/Types.hs
@@ -366,6 +366,8 @@ type UserName = Text
 
 type ContactName = Text
 
+type MemberName = Text
+
 type GroupName = Text
 
 optionalFullName :: ContactName -> Text -> Text
@@ -800,6 +802,9 @@ memberConn GroupMember {activeConn} = activeConn
 memberConnId :: GroupMember -> Maybe ConnId
 memberConnId GroupMember {activeConn} = aConnId <$> activeConn
 
+sameMemberId :: MemberId -> GroupMember -> Bool
+sameMemberId memId GroupMember {memberId} = memId == memberId
+
 memberChatVRange' :: GroupMember -> VersionRangeChat
 memberChatVRange' GroupMember {activeConn, memberChatVRange} = case activeConn of
   Just Connection {peerChatVRange} -> peerChatVRange
@@ -839,7 +844,7 @@ data NewGroupMember = NewGroupMember
   }
 
 newtype MemberId = MemberId {unMemberId :: ByteString}
-  deriving (Eq, Show)
+  deriving (Eq, Ord, Show)
   deriving newtype (FromField)
 
 instance ToField MemberId where toField (MemberId m) = toField $ Binary m
diff --git a/src/Simplex/Chat/Util.hs b/src/Simplex/Chat/Util.hs
index 3f7d19fd6d..506829befc 100644
--- a/src/Simplex/Chat/Util.hs
+++ b/src/Simplex/Chat/Util.hs
@@ -4,7 +4,7 @@
 {-# LANGUAGE TupleSections #-}
 {-# OPTIONS_GHC -Wno-orphans #-}
 
-module Simplex.Chat.Util (week, encryptFile, chunkSize, liftIOEither, shuffle) where
+module Simplex.Chat.Util (week, encryptFile, chunkSize, liftIOEither, shuffle, neUnzip3) where
 
 import Control.Exception (Exception)
 import Control.Monad
@@ -15,6 +15,7 @@ import Control.Monad.Reader
 import Data.Bifunctor (first)
 import qualified Data.ByteString.Lazy as LB
 import Data.List (sortBy)
+import Data.List.NonEmpty (NonEmpty (..))
 import Data.Ord (comparing)
 import Data.Time (NominalDiffTime)
 import Data.Word (Word16)
@@ -56,6 +57,11 @@ liftIOEither :: (MonadIO m, MonadError e m) => IO (Either e a) -> m a
 liftIOEither a = liftIO a >>= liftEither
 {-# INLINE liftIOEither #-}
 
+neUnzip3 :: NonEmpty (a, b, c) -> (NonEmpty a, NonEmpty b, NonEmpty c)
+neUnzip3 ((a, b, c) :| xs) =
+  let (as, bs, cs) = unzip3 xs
+   in (a :| as, b :| bs, c :| cs)
+
 newtype InternalException e = InternalException {unInternalException :: e}
   deriving (Eq, Show)
 
diff --git a/src/Simplex/Chat/View.hs b/src/Simplex/Chat/View.hs
index 21cd9a6636..2025979d45 100644
--- a/src/Simplex/Chat/View.hs
+++ b/src/Simplex/Chat/View.hs
@@ -499,7 +499,7 @@ responseToView hu@(currentRH, user_) ChatConfig {logLevel, showReactions, showRe
     contactList :: [ContactRef] -> String
     contactList cs = T.unpack . T.intercalate ", " $ map (\ContactRef {localDisplayName = n} -> "@" <> n) cs
     unmuted :: User -> ChatInfo c -> ChatItem c d -> [StyledString] -> [StyledString]
-    unmuted u chat ci@ChatItem {chatDir} = unmuted' u chat chatDir $ isMention ci
+    unmuted u chat ci@ChatItem {chatDir} = unmuted' u chat chatDir $ isUserMention ci
     unmutedReaction :: User -> ChatInfo c -> CIReaction c d -> [StyledString] -> [StyledString]
     unmutedReaction u chat CIReaction {chatDir} = unmuted' u chat chatDir False
     unmuted' :: User -> ChatInfo c -> CIDirection c d -> Bool -> [StyledString] -> [StyledString]
@@ -588,7 +588,7 @@ viewChats ts tz = concatMap chatPreview . reverse
           _ -> []
 
 viewChatItem :: forall c d. MsgDirectionI d => ChatInfo c -> ChatItem c d -> Bool -> CurrentTime -> TimeZone -> [StyledString]
-viewChatItem chat ci@ChatItem {chatDir, meta = meta@CIMeta {itemForwarded, forwardedByMember}, content, quotedItem, file} doShow ts tz =
+viewChatItem chat ci@ChatItem {chatDir, meta = meta@CIMeta {itemForwarded, forwardedByMember, userMention}, content, quotedItem, file} doShow ts tz =
   withGroupMsgForwarded . withItemDeleted <$> viewCI
   where
     viewCI = case chat of
@@ -627,7 +627,7 @@ viewChatItem chat ci@ChatItem {chatDir, meta = meta@CIMeta {itemForwarded, forwa
           CIRcvBlocked {} -> receivedWithTime_ ts tz (ttyFromGroup g m) context meta [plainContent content] False
           _ -> showRcvItem from
           where
-            from = ttyFromGroup g m
+            from = ttyFromGroupAttention g m userMention
         where
           context =
             maybe
@@ -2178,7 +2178,6 @@ viewChatError isCmd logLevel testView = \case
     CEFileNotApproved fileId unknownSrvs -> ["file " <> sShow fileId <> " aborted, unknwon XFTP servers:"] <> map (plain . show) unknownSrvs
     CEFallbackToSMPProhibited fileId -> ["recipient tried to accept file " <> sShow fileId <> " via old protocol, prohibited"]
     CEInlineFileProhibited _ -> ["A small file sent without acceptance - you can enable receiving such files with -f option."]
-    CEInvalidQuote -> ["cannot reply to this message"]
     CEInvalidForward -> ["cannot forward message(s)"]
     CEInvalidChatItemUpdate -> ["cannot update this item"]
     CEInvalidChatItemDelete -> ["cannot delete this item"]
@@ -2373,7 +2372,10 @@ ttyFullGroup GroupInfo {localDisplayName = g, groupProfile = GroupProfile {fullN
   ttyGroup g <> optFullName g fullName
 
 ttyFromGroup :: GroupInfo -> GroupMember -> StyledString
-ttyFromGroup g m = membershipIncognito g <> ttyFrom (fromGroup_ g m)
+ttyFromGroup g m = ttyFromGroupAttention g m False
+
+ttyFromGroupAttention :: GroupInfo -> GroupMember -> Bool -> StyledString
+ttyFromGroupAttention g m attention = membershipIncognito g <> ttyFrom (fromGroupAttention_ g m attention)
 
 ttyFromGroupEdited :: GroupInfo -> GroupMember -> StyledString
 ttyFromGroupEdited g m = membershipIncognito g <> ttyFrom (fromGroup_ g m <> "[edited] ")
@@ -2383,7 +2385,12 @@ ttyFromGroupDeleted g m deletedText_ =
   membershipIncognito g <> ttyFrom (fromGroup_ g m <> maybe "" (\t -> "[" <> t <> "] ") deletedText_)
 
 fromGroup_ :: GroupInfo -> GroupMember -> Text
-fromGroup_ g m = "#" <> viewGroupName g <> " " <> viewMemberName m <> "> "
+fromGroup_ g m = fromGroupAttention_ g m False
+
+fromGroupAttention_ :: GroupInfo -> GroupMember -> Bool -> Text
+fromGroupAttention_ g m attention =
+  let attn = if attention then "!" else ""
+   in "#" <> viewGroupName g <> " " <> viewMemberName m <> attn <> "> "
 
 ttyFrom :: Text -> StyledString
 ttyFrom = styled $ colored Yellow
diff --git a/tests/ChatTests/Direct.hs b/tests/ChatTests/Direct.hs
index a930246106..ea4a30b412 100644
--- a/tests/ChatTests/Direct.hs
+++ b/tests/ChatTests/Direct.hs
@@ -1620,7 +1620,7 @@ testMuteGroup =
       cath <## "      hello too!"
       concurrentlyN_
         [ do
-            bob <# "#team cath> > bob hello <muted>"
+            bob <# "#team cath!> > bob hello <muted>"
             bob <## "      hello too! <muted>",
           do
             alice <# "#team cath> > bob hello"
@@ -1633,7 +1633,7 @@ testMuteGroup =
       alice <## "      hey bob!"
       concurrentlyN_
         [ do
-            bob <# "#team alice> > bob hello"
+            bob <# "#team alice!> > bob hello"
             bob <## "      hey bob!",
           do
             cath <# "#team alice> > bob hello"
@@ -1647,7 +1647,7 @@ testMuteGroup =
             bob <# "#team alice> > cath hello too! <muted>"
             bob <## "      hey cath! <muted>",
           do
-            cath <# "#team alice> > cath hello too!"
+            cath <# "#team alice!> > cath hello too!"
             cath <## "      hey cath!"
         ]
       bob ##> "/gs"
diff --git a/tests/ChatTests/Files.hs b/tests/ChatTests/Files.hs
index cceb91c77c..c573a1957a 100644
--- a/tests/ChatTests/Files.hs
+++ b/tests/ChatTests/Files.hs
@@ -372,9 +372,9 @@ testGroupSendImageWithTextAndQuote =
       alice <## "use /fc 1 to cancel sending"
       concurrentlyN_
         [ do
-            bob <# "#team alice> > bob hi team"
+            bob <# "#team alice!> > bob hi team"
             bob <## "      hey bob"
-            bob <# "#team alice> sends file test.jpg (136.5 KiB / 139737 bytes)"
+            bob <# "#team alice!> sends file test.jpg (136.5 KiB / 139737 bytes)"
             bob <## "use /fr 1 [<dir>/ | <path>] to receive it",
           do
             cath <# "#team alice> > bob hi team"
diff --git a/tests/ChatTests/Groups.hs b/tests/ChatTests/Groups.hs
index 4bf5003a31..8db304791f 100644
--- a/tests/ChatTests/Groups.hs
+++ b/tests/ChatTests/Groups.hs
@@ -15,14 +15,17 @@ import ChatTests.Utils
 import Control.Concurrent (threadDelay)
 import Control.Concurrent.Async (concurrently_)
 import Control.Monad (forM_, void, when)
+import Data.Bifunctor (second)
 import qualified Data.ByteString.Char8 as B
 import Data.List (intercalate, isInfixOf)
+import qualified Data.Map.Strict as M
 import qualified Data.Text as T
 import Simplex.Chat.Controller (ChatConfig (..))
+import Simplex.Chat.Library.Internal (uniqueMsgMentions)
 import Simplex.Chat.Messages (ChatItemId)
 import Simplex.Chat.Options
-import Simplex.Chat.Protocol (supportedChatVRange)
-import Simplex.Chat.Types (VersionRangeChat)
+import Simplex.Chat.Protocol (MemberMention (..), supportedChatVRange)
+import Simplex.Chat.Types (MemberId (..), VersionRangeChat)
 import Simplex.Chat.Types.Shared (GroupMemberRole (..))
 import Simplex.Messaging.Agent.Env.SQLite
 import Simplex.Messaging.Agent.RetryInterval
@@ -186,6 +189,9 @@ chatGroupTests = do
     it "mark member inactive on reaching quota" testGroupMemberInactive
   describe "group member reports" $ do
     it "should send report to group owner, admins and moderators, but not other users" testGroupMemberReports
+  describe "group member mentions" $ do
+    it "should send messages with member mentions" testMemberMention
+    describe "uniqueMsgMentions" testUniqueMsgMentions
   where
     _0 = supportedChatVRange -- don't create direct connections
     _1 = groupCreateDirectVRange
@@ -1044,7 +1050,7 @@ testGroupMessageQuotedReply =
       bob <## "      hello, all good, you?"
       concurrently_
         ( do
-            alice <# "#team bob> > alice hello! how are you?"
+            alice <# "#team bob!> > alice hello! how are you?"
             alice <## "      hello, all good, you?"
         )
         ( do
@@ -1079,7 +1085,7 @@ testGroupMessageQuotedReply =
             alice <## "      hi there!"
         )
         ( do
-            bob <# "#team cath> > bob hello, all good, you?"
+            bob <# "#team cath!> > bob hello, all good, you?"
             bob <## "      hi there!"
         )
       cath #$> ("/_get chat #1 count=1", chat', [((1, "hi there!"), Just (0, "hello, all good, you?"))])
@@ -1090,7 +1096,7 @@ testGroupMessageQuotedReply =
       alice <## "      go on"
       concurrently_
         ( do
-            bob <# "#team alice> > bob will tell more"
+            bob <# "#team alice!> > bob will tell more"
             bob <## "      go on"
         )
         ( do
@@ -1131,7 +1137,7 @@ testGroupMessageUpdate =
       bob <## "      hi alice"
       concurrently_
         ( do
-            alice <# "#team bob> > alice hey 👋"
+            alice <# "#team bob!> > alice hey 👋"
             alice <## "      hi alice"
         )
         ( do
@@ -1158,7 +1164,7 @@ testGroupMessageUpdate =
       cath <## "      greetings!"
       concurrently_
         ( do
-            alice <# "#team cath> > alice greetings 🤝"
+            alice <# "#team cath!> > alice greetings 🤝"
             alice <## "      greetings!"
         )
         ( do
@@ -1272,7 +1278,7 @@ testGroupMessageDelete =
       bob <## "      hi alic"
       concurrently_
         ( do
-            alice <# "#team bob> > alice hello!"
+            alice <# "#team bob!> > alice hello!"
             alice <## "      hi alic"
         )
         ( do
@@ -5423,7 +5429,7 @@ testGroupHistoryQuotes =
       alice `send` "> #team @bob (BOB) 2"
       alice <# "#team > bob BOB"
       alice <## "      2"
-      bob <# "#team alice> > bob BOB"
+      bob <# "#team alice!> > bob BOB"
       bob <## "      2"
 
       threadDelay 1000000
@@ -5431,7 +5437,7 @@ testGroupHistoryQuotes =
       bob `send` "> #team @alice (ALICE) 3"
       bob <# "#team > alice ALICE"
       bob <## "      3"
-      alice <# "#team bob> > alice ALICE"
+      alice <# "#team bob!> > alice ALICE"
       alice <## "      3"
 
       threadDelay 1000000
@@ -6651,3 +6657,49 @@ testGroupMemberReports =
       alice #$> ("/_get chat #1 content=report count=100", chat, [(0, "report content [marked deleted by you]")])
       bob #$> ("/_get chat #1 content=report count=100", chat, [(0, "report content [marked deleted by alice]")])
       dan #$> ("/_get chat #1 content=report count=100", chat, [(1, "report content [marked deleted by alice]")])
+
+testMemberMention :: HasCallStack => TestParams -> IO ()
+testMemberMention =
+  testChat3 aliceProfile bobProfile cathProfile $
+    \alice bob cath -> do
+      createGroup3 "team" alice bob cath
+      alice #> "#team hello!"
+      concurrentlyN_
+        [ bob <# "#team alice> hello!",
+          cath <# "#team alice> hello!"
+        ]
+      bob #> "#team hello @alice"
+      concurrentlyN_
+        [ alice <# "#team bob!> hello @alice",
+          cath <# "#team bob> hello @alice"
+        ]
+      alice #> "#team hello @bob @bob @cath"
+      concurrentlyN_
+        [ bob <# "#team alice!> hello @bob @bob @cath",
+          cath <# "#team alice!> hello @bob @bob @cath"
+        ]
+      cath #> "#team hello @Alice" -- not a mention
+      concurrentlyN_
+        [ alice <# "#team cath> hello @Alice",
+          bob <# "#team cath> hello @Alice"
+        ]
+
+testUniqueMsgMentions :: SpecWith TestParams
+testUniqueMsgMentions = do
+  it "1 correct mention" $ \_ ->
+    uniqueMsgMentions 2 (mm [("alice", "abcd")]) ["alice"]
+      `shouldBe` (mm [("alice", "abcd")])
+  it "2 correct mentions" $ \_ ->
+    uniqueMsgMentions 2 (mm [("alice", "abcd"), ("bob", "efgh")]) ["alice", "bob"]
+      `shouldBe` (mm [("alice", "abcd"), ("bob", "efgh")])
+  it "2 correct mentions with repetition" $ \_ ->
+    uniqueMsgMentions 2 (mm [("alice", "abcd"), ("bob", "efgh")]) ["alice", "alice", "alice", "bob", "bob", "bob"]
+      `shouldBe` (mm [("alice", "abcd"), ("bob", "efgh")])
+  it "too many mentions - drop extras" $ \_ ->
+    uniqueMsgMentions 3 (mm [("a", "abcd"), ("b", "efgh"), ("c", "1234"), ("d", "5678")]) ["a", "a", "a", "b", "b", "c", "d"]
+      `shouldBe` (mm [("a", "abcd"), ("b", "efgh"), ("c", "1234")])
+  it "repeated-with-different name - drop extras" $ \_ ->
+    uniqueMsgMentions 2 (mm [("alice", "abcd"), ("alice2", "abcd"), ("bob", "efgh"), ("bob2", "efgh")]) ["alice", "alice2", "bob", "bob2"]
+      `shouldBe` (mm [("alice", "abcd"), ("bob", "efgh")])
+  where
+    mm = M.fromList . map (second $ MemberMention . MemberId)
diff --git a/tests/MarkdownTests.hs b/tests/MarkdownTests.hs
index 615edc02c4..3f3b5adbc2 100644
--- a/tests/MarkdownTests.hs
+++ b/tests/MarkdownTests.hs
@@ -19,6 +19,7 @@ markdownTests = do
   textWithUri
   textWithEmail
   textWithPhone
+  textWithMentions
   multilineMarkdownList
 
 textFormat :: Spec
@@ -180,8 +181,10 @@ textWithEmail = describe "text with Email" do
     parseMarkdown "chat@simplex.chat test" `shouldBe` email "chat@simplex.chat" <> " test"
     parseMarkdown "test1 chat@simplex.chat test2" `shouldBe` "test1 " <> email "chat@simplex.chat" <> " test2"
   it "ignored as markdown" do
-    parseMarkdown "chat @simplex.chat" `shouldBe` "chat @simplex.chat"
-    parseMarkdown "this is chat @simplex.chat" `shouldBe` "this is chat @simplex.chat"
+    parseMarkdown "chat @simplex.chat" `shouldBe` "chat " <> mention "simplex.chat" "@simplex.chat"
+    parseMarkdown "this is chat @simplex.chat" `shouldBe` "this is chat " <> mention "simplex.chat" "@simplex.chat"
+    parseMarkdown "this is chat@ simplex.chat" `shouldBe` "this is chat@ simplex.chat"
+    parseMarkdown "this is chat @ simplex.chat" `shouldBe` "this is chat @ simplex.chat"
 
 phone :: Text -> Markdown
 phone = Markdown $ Just Phone
@@ -204,6 +207,21 @@ textWithPhone = describe "text with Phone" do
   it "ignored as markdown (double spaces)" $
     parseMarkdown "test 07777  777  777 test" `shouldBe` "test 07777  777  777 test"
 
+mention :: Text -> Text -> Markdown
+mention = Markdown . Just . Mention
+
+textWithMentions :: Spec
+textWithMentions = describe "text with mentions" do
+  it "correct markdown" do
+    parseMarkdown "@alice" `shouldBe` mention "alice" "@alice"
+    parseMarkdown "hello @alice" `shouldBe` "hello " <> mention "alice" "@alice"
+    parseMarkdown "hello @alice !" `shouldBe` "hello " <> mention "alice" "@alice" <> " !"
+    parseMarkdown "@'alice jones'" `shouldBe` mention "alice jones" "@'alice jones'"
+    parseMarkdown "hello @'alice jones'!" `shouldBe` "hello " <> mention "alice jones" "@'alice jones'" <> "!"
+  it "ignored as markdown" $ do
+    parseMarkdown "hello @'alice jones!" `shouldBe` "hello @'alice jones!"
+    parseMarkdown "hello @ alice!" `shouldBe` "hello @ alice!"
+
 uri' :: Text -> FormattedText
 uri' = FormattedText $ Just Uri
 
diff --git a/tests/ProtocolTests.hs b/tests/ProtocolTests.hs
index aba67ed034..4f191384ae 100644
--- a/tests/ProtocolTests.hs
+++ b/tests/ProtocolTests.hs
@@ -116,10 +116,10 @@ decodeChatMessageTest = describe "Chat message encoding/decoding" $ do
       #==# XMsgNew (MCSimple (extMsgContent (MCText "hello") Nothing))
   it "x.msg.new simple text - timed message TTL" $
     "{\"v\":\"1\",\"event\":\"x.msg.new\",\"params\":{\"content\":{\"text\":\"hello\",\"type\":\"text\"},\"ttl\":3600}}"
-      #==# XMsgNew (MCSimple (ExtMsgContent (MCText "hello") Nothing (Just 3600) Nothing))
+      #==# XMsgNew (MCSimple (ExtMsgContent (MCText "hello") [] Nothing (Just 3600) Nothing))
   it "x.msg.new simple text - live message" $
     "{\"v\":\"1\",\"event\":\"x.msg.new\",\"params\":{\"content\":{\"text\":\"hello\",\"type\":\"text\"},\"live\":true}}"
-      #==# XMsgNew (MCSimple (ExtMsgContent (MCText "hello") Nothing Nothing (Just True)))
+      #==# XMsgNew (MCSimple (ExtMsgContent (MCText "hello") [] Nothing Nothing (Just True)))
   it "x.msg.new simple link" $
     "{\"v\":\"1\",\"event\":\"x.msg.new\",\"params\":{\"content\":{\"text\":\"https://simplex.chat\",\"type\":\"link\",\"preview\":{\"description\":\"SimpleX Chat\",\"image\":\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgA\",\"title\":\"SimpleX Chat\",\"uri\":\"https://simplex.chat\"}}}}"
       #==# XMsgNew (MCSimple (extMsgContent (MCLink "https://simplex.chat" $ LinkPreview {uri = "https://simplex.chat", title = "SimpleX Chat", description = "SimpleX Chat", image = ImageData "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgA", content = Nothing}) Nothing))
@@ -146,22 +146,22 @@ decodeChatMessageTest = describe "Chat message encoding/decoding" $ do
       ##==## ChatMessage
         chatInitialVRange
         (Just $ SharedMsgId "\1\2\3\4")
-        (XMsgNew (MCQuote quotedMsg (ExtMsgContent (MCText "hello to you too") Nothing (Just 3600) Nothing)))
+        (XMsgNew (MCQuote quotedMsg (ExtMsgContent (MCText "hello to you too") [] Nothing (Just 3600) Nothing)))
   it "x.msg.new quote - live message" $
     "{\"v\":\"1\",\"msgId\":\"AQIDBA==\",\"event\":\"x.msg.new\",\"params\":{\"content\":{\"text\":\"hello to you too\",\"type\":\"text\"},\"quote\":{\"content\":{\"text\":\"hello there!\",\"type\":\"text\"},\"msgRef\":{\"msgId\":\"BQYHCA==\",\"sent\":true,\"sentAt\":\"1970-01-01T00:00:01.000000001Z\"}},\"live\":true}}"
       ##==## ChatMessage
         chatInitialVRange
         (Just $ SharedMsgId "\1\2\3\4")
-        (XMsgNew (MCQuote quotedMsg (ExtMsgContent (MCText "hello to you too") Nothing Nothing (Just True))))
+        (XMsgNew (MCQuote quotedMsg (ExtMsgContent (MCText "hello to you too") [] Nothing Nothing (Just True))))
   it "x.msg.new forward" $
     "{\"v\":\"1\",\"msgId\":\"AQIDBA==\",\"event\":\"x.msg.new\",\"params\":{\"content\":{\"text\":\"hello\",\"type\":\"text\"},\"forward\":true}}"
       ##==## ChatMessage chatInitialVRange (Just $ SharedMsgId "\1\2\3\4") (XMsgNew $ MCForward (extMsgContent (MCText "hello") Nothing))
   it "x.msg.new forward - timed message TTL" $
     "{\"v\":\"1\",\"msgId\":\"AQIDBA==\",\"event\":\"x.msg.new\",\"params\":{\"content\":{\"text\":\"hello\",\"type\":\"text\"},\"forward\":true,\"ttl\":3600}}"
-      ##==## ChatMessage chatInitialVRange (Just $ SharedMsgId "\1\2\3\4") (XMsgNew $ MCForward (ExtMsgContent (MCText "hello") Nothing (Just 3600) Nothing))
+      ##==## ChatMessage chatInitialVRange (Just $ SharedMsgId "\1\2\3\4") (XMsgNew $ MCForward (ExtMsgContent (MCText "hello") [] Nothing (Just 3600) Nothing))
   it "x.msg.new forward - live message" $
     "{\"v\":\"1\",\"msgId\":\"AQIDBA==\",\"event\":\"x.msg.new\",\"params\":{\"content\":{\"text\":\"hello\",\"type\":\"text\"},\"forward\":true,\"live\":true}}"
-      ##==## ChatMessage chatInitialVRange (Just $ SharedMsgId "\1\2\3\4") (XMsgNew $ MCForward (ExtMsgContent (MCText "hello") Nothing Nothing (Just True)))
+      ##==## ChatMessage chatInitialVRange (Just $ SharedMsgId "\1\2\3\4") (XMsgNew $ MCForward (ExtMsgContent (MCText "hello") [] Nothing Nothing (Just True)))
   it "x.msg.new simple text with file" $
     "{\"v\":\"1\",\"event\":\"x.msg.new\",\"params\":{\"content\":{\"text\":\"hello\",\"type\":\"text\"},\"file\":{\"fileSize\":12345,\"fileName\":\"photo.jpg\"}}}"
       #==# XMsgNew (MCSimple (extMsgContent (MCText "hello") (Just FileInvitation {fileName = "photo.jpg", fileSize = 12345, fileDigest = Nothing, fileConnReq = Nothing, fileInline = Nothing, fileDescr = Nothing})))
@@ -193,7 +193,7 @@ decodeChatMessageTest = describe "Chat message encoding/decoding" $ do
       ##==## ChatMessage chatInitialVRange (Just $ SharedMsgId "\1\2\3\4") (XMsgNew $ MCForward (extMsgContent (MCText "hello") (Just FileInvitation {fileName = "photo.jpg", fileSize = 12345, fileDigest = Nothing, fileConnReq = Nothing, fileInline = Nothing, fileDescr = Nothing})))
   it "x.msg.update" $
     "{\"v\":\"1\",\"event\":\"x.msg.update\",\"params\":{\"msgId\":\"AQIDBA==\", \"content\":{\"text\":\"hello\",\"type\":\"text\"}}}"
-      #==# XMsgUpdate (SharedMsgId "\1\2\3\4") (MCText "hello") Nothing Nothing
+      #==# XMsgUpdate (SharedMsgId "\1\2\3\4") (MCText "hello") [] Nothing Nothing
   it "x.msg.del" $
     "{\"v\":\"1\",\"event\":\"x.msg.del\",\"params\":{\"msgId\":\"AQIDBA==\"}}"
       #==# XMsgDel (SharedMsgId "\1\2\3\4") Nothing
diff --git a/tests/SchemaDump.hs b/tests/SchemaDump.hs
index a6ce19da87..a2dde191cb 100644
--- a/tests/SchemaDump.hs
+++ b/tests/SchemaDump.hs
@@ -158,8 +158,8 @@ saveQueryPlans = it "verify and overwrite query plans" $ \TestParams {chatQueryS
       agentQueryStats
       (createAgentStore (DBOpts testAgentDB "" False True TQOff) MCError)
       (const $ pure ())
-  chatSavedPlans' `shouldBe` chatSavedPlans
-  agentSavedPlans' `shouldBe` agentSavedPlans
+  chatSavedPlans' == chatSavedPlans `shouldBe` True
+  agentSavedPlans' == agentSavedPlans `shouldBe` True
   removeFile testDB
   removeFile testAgentDB
   where
diff --git a/tests/ValidNames.hs b/tests/ValidNames.hs
index bbc9c853ea..03089b1721 100644
--- a/tests/ValidNames.hs
+++ b/tests/ValidNames.hs
@@ -21,6 +21,7 @@ testMkValidName = do
   mkValidName "J . . Doe" `shouldBe` "J . Doe"
   mkValidName "@alice" `shouldBe` "alice"
   mkValidName "#alice" `shouldBe` "alice"
+  mkValidName "'alice" `shouldBe` "alice"
   mkValidName " alice" `shouldBe` "alice"
   mkValidName "alice " `shouldBe` "alice"
   mkValidName "John  Doe" `shouldBe` "John Doe"