wip

apps/ios/Shared/Model/AppAPITypes.swift

@@ -42,10 +42,12 @@ enum ChatCommand: ChatCmdProtocol {
     case apiGetSettings(settings: AppSettings)
     case apiGetChatTags(userId: Int64)
     case apiGetChats(userId: Int64)
-    case apiGetChat(chatId: ChatId, scope: GroupChatScope?, contentTag: MsgContentTag?, pagination: ChatPagination, search: String)
+    case apiGetChat(chatId: ChatId, scope: GroupChatScope?, contentTag: MsgContentTag?, pagination: ChatPagination, search: String, parentItemId: Int64? = nil)
     case apiGetChatContentTypes(chatId: ChatId, scope: GroupChatScope?)
     case apiGetChatItemInfo(type: ChatType, id: Int64, scope: GroupChatScope?, itemId: Int64)
     case apiSendMessages(type: ChatType, id: Int64, scope: GroupChatScope?, sendAsGroup: Bool, live: Bool, ttl: Int?, composedMessages: [ComposedMessage])
+    case apiSendComment(groupId: Int64, parentItemId: Int64, live: Bool, ttl: Int?, composedMessages: [ComposedMessage])
+    case apiSetCommentsDisabled(groupId: Int64, parentItemId: Int64, disabled: Bool)
     case apiCreateChatTag(tag: ChatTagData)
     case apiSetChatTags(type: ChatType, id: Int64, tagIds: [Int64])
     case apiDeleteChatTag(tagId: Int64)
@@ -231,9 +233,10 @@ enum ChatCommand: ChatCmdProtocol {
             case let .apiGetSettings(settings): return "/_get app settings \(encodeJSON(settings))"
             case let .apiGetChatTags(userId): return "/_get tags \(userId)"
             case let .apiGetChats(userId): return "/_get chats \(userId) pcc=on"
-            case let .apiGetChat(chatId, scope, contentTag, pagination, search):
+            case let .apiGetChat(chatId, scope, contentTag, pagination, search, parentItemId):
+                let parent = parentItemId != nil ? " parent=\(parentItemId!)" : ""
                 let tag = contentTag != nil ? " content=\(contentTag!.rawValue)" : ""
-                return "/_get chat \(chatId)\(scopeRef(scope))\(tag) \(pagination.cmdString)" + (search == "" ? "" : " search=\(search)")
+                return "/_get chat \(chatId)\(scopeRef(scope))\(parent)\(tag) \(pagination.cmdString)" + (search == "" ? "" : " search=\(search)")
             case let .apiGetChatContentTypes(chatId, scope): return "/_get content types \(chatId)\(scopeRef(scope))"
             case let .apiGetChatItemInfo(type, id, scope, itemId): return "/_get item info \(ref(type, id, scope: scope)) \(itemId)"
             case let .apiSendMessages(type, id, scope, sendAsGroup, live, ttl, composedMessages):
@@ -241,6 +244,12 @@ enum ChatCommand: ChatCmdProtocol {
                 let ttlStr = ttl != nil ? "\(ttl!)" : "default"
                 let asGroup = sendAsGroup ? "(as_group=on)" : ""
                 return "/_send \(ref(type, id, scope: scope))\(asGroup) live=\(onOff(live)) ttl=\(ttlStr) json \(msgs)"
+            case let .apiSendComment(groupId, parentItemId, live, ttl, composedMessages):
+                let msgs = encodeJSON(composedMessages)
+                let ttlStr = ttl != nil ? "\(ttl!)" : "default"
+                return "/_comment #\(groupId) \(parentItemId) live=\(onOff(live)) ttl=\(ttlStr) json \(msgs)"
+            case let .apiSetCommentsDisabled(groupId, parentItemId, disabled):
+                return "/_comments_disabled #\(groupId) \(parentItemId) \(onOff(disabled))"
             case let .apiCreateChatTag(tag): return "/_create tag \(encodeJSON(tag))"
             case let .apiSetChatTags(type, id, tagIds): return "/_tags \(ref(type, id, scope: nil)) \(tagIds.map({ "\($0)" }).joined(separator: ","))"
             case let .apiDeleteChatTag(tagId): return "/_delete tag \(tagId)"
@@ -442,6 +451,8 @@ enum ChatCommand: ChatCmdProtocol {
             case .apiGetChatContentTypes: return "apiGetChatContentTypes"
             case .apiGetChatItemInfo: return "apiGetChatItemInfo"
             case .apiSendMessages: return "apiSendMessages"
+            case .apiSendComment: return "apiSendComment"
+            case .apiSetCommentsDisabled: return "apiSetCommentsDisabled"
             case .apiCreateChatTag: return "apiCreateChatTag"
             case .apiSetChatTags: return "apiSetChatTags"
             case .apiDeleteChatTag: return "apiDeleteChatTag"

apps/ios/Shared/Model/ChatModel.swift

@@ -58,6 +58,10 @@ private func addTermItem(_ items: inout [TerminalItem], _ item: TerminalItem) {
 enum SecondaryItemsModelFilter {
     case groupChatScopeContext(groupScopeInfo: GroupChatScopeInfo)
     case msgContentTagContext(contentTag: MsgContentTag)
+    // Comments thread under a channel post. The parent ChatItem carries the
+    // toolbar preview text (slice 4) and the parent.id used to route inbound
+    // items (ci.parentChatItemId == parent.id).
+    case groupChannelMsgContext(parent: ChatItem)
 
     func descr() -> String {
         switch self {
@@ -65,6 +69,8 @@ enum SecondaryItemsModelFilter {
             return "groupChatScopeContext \(groupScopeInfo.toChatScope())"
         case let .msgContentTagContext(contentTag):
             return "msgContentTagContext \(contentTag.rawValue)"
+        case let .groupChannelMsgContext(parent):
+            return "groupChannelMsgContext parent=\(parent.id)"
         }
     }
 }
@@ -108,11 +114,58 @@ class ItemsModel: ObservableObject {
 
     // Spec: spec/state.md#loadSecondaryChat
     static func loadSecondaryChat(_ chatId: ChatId, chatFilter: SecondaryItemsModelFilter, willNavigate: @escaping () -> Void = {}) {
+        // Comments-thread context: fetch with parentItemId, then inject the local-only
+        // ChannelMsgInfo carrier into the returned ChatInfo (the wire shape has no
+        // channelMsgInfo field; the carrier is set here so views can read it from cInfo).
+        // The owner-side parent may briefly lack itemSharedMsgId during send — guard against that.
+        if case let .groupChannelMsgContext(parent) = chatFilter {
+            guard let sharedId = parent.meta.itemSharedMsgId else { return }
+            let im = ItemsModel(secondaryIMFilter: chatFilter)
+            ChatModel.shared.secondaryIM = im
+            Task {
+                do {
+                    let (chat, _) = try await apiGetChat(
+                        chatId: chatId,
+                        scope: nil,
+                        pagination: .last(count: loadItemsPerPage),
+                        parentItemId: parent.id
+                    )
+                    let rewritten = injectChannelMsgInfo(chat.chatInfo, parent: parent, sharedId: sharedId)
+                    await MainActor.run {
+                        im.reversedChatItems = chat.chatItems.reversed()
+                        ChatModel.shared.chatId = chatId
+                        // Replace the chat in the model with the rewritten info so views
+                        // querying secondaryIM.cInfo see the injected ChannelMsgInfo.
+                        if let i = ChatModel.shared.getChatIndex(chatId) {
+                            ChatModel.shared.chats[i].chatInfo = rewritten
+                        }
+                        willNavigate()
+                    }
+                } catch {
+                    logger.error("loadSecondaryChat (comments thread) failed: \(responseError(error))")
+                }
+            }
+            return
+        }
         let im = ItemsModel(secondaryIMFilter: chatFilter)
         ChatModel.shared.secondaryIM = im
         im.loadOpenChat(chatId, willNavigate: willNavigate)
     }
 
+    // Rewrites a ChatInfo.group's third associated value to embed the comments-thread
+    // carrier. Other ChatInfo cases (direct, local, contactRequest, contactConnection)
+    // are not comment contexts and pass through unchanged.
+    private static func injectChannelMsgInfo(_ cInfo: ChatInfo, parent: ChatItem, sharedId: String) -> ChatInfo {
+        if case let .group(groupInfo, groupChatScope, _) = cInfo {
+            return .group(
+                groupInfo: groupInfo,
+                groupChatScope: groupChatScope,
+                channelMsgInfo: ChannelMsgInfo(channelMsgItem: parent, channelMsgSharedId: sharedId)
+            )
+        }
+        return cInfo
+    }
+
     // Spec: spec/state.md#loadOpenChat
     func loadOpenChat(_ chatId: ChatId, willNavigate: @escaping () -> Void = {}) {
         navigationTimeoutTask?.cancel()
@@ -511,7 +564,7 @@ final class ChatModel: ObservableObject {
 
     func getGroupChat(_ groupId: Int64) -> Chat? {
         chats.first { chat in
-            if case let .group(groupInfo, _) = chat.chatInfo {
+            if case let .group(groupInfo, _, _) = chat.chatInfo {
                 return groupInfo.groupId == groupId
             } else {
                 return false
@@ -566,8 +619,8 @@ final class ChatModel: ObservableObject {
     // Spec: spec/state.md#updateChatInfo
     func updateChatInfo(_ cInfo: ChatInfo) {
         if let i = getChatIndex(cInfo.id) {
-            if case let .group(groupInfo, groupChatScope) = cInfo, groupChatScope != nil {
-                chats[i].chatInfo = .group(groupInfo: groupInfo, groupChatScope: nil)
+            if case let .group(groupInfo, groupChatScope, _) = cInfo, groupChatScope != nil {
+                chats[i].chatInfo = .group(groupInfo: groupInfo, groupChatScope: nil, channelMsgInfo: nil)
             } else {
                 chats[i].chatInfo = cInfo
             }
@@ -592,7 +645,7 @@ final class ChatModel: ObservableObject {
     }
 
     func updateGroup(_ groupInfo: GroupInfo) {
-        updateChat(.group(groupInfo: groupInfo, groupChatScope: nil))
+        updateChat(.group(groupInfo: groupInfo, groupChatScope: nil, channelMsgInfo: nil))
     }
 
     private func updateChat(_ cInfo: ChatInfo, addMissing: Bool = true) {
@@ -657,7 +710,7 @@ final class ChatModel: ObservableObject {
         // update chat list
         if let i = getChatIndex(cInfo.id) {
             // update preview
-            if cInfo.groupChatScope() == nil || cInfo.groupInfo?.membership.memberPending ?? false {
+            if (cInfo.groupChatScope() == nil && cInfo.channelMsgInfo() == nil) || cInfo.groupInfo?.membership.memberPending ?? false {
                 chats[i].chatItems = switch cInfo {
                 case .group:
                     if let currentPreviewItem = chats[i].chatItems.first {
@@ -679,7 +732,7 @@ final class ChatModel: ObservableObject {
             // pop chat
             popChatCollector.throttlePopChat(cInfo.id, currentPosition: i)
         } else {
-            if cInfo.groupChatScope() == nil {
+            if cInfo.groupChatScope() == nil && cInfo.channelMsgInfo() == nil {
                 addChat(Chat(chatInfo: cInfo, chatItems: [cItem]))
             } else {
                 addChat(Chat(chatInfo: cInfo, chatItems: []))
@@ -709,6 +762,15 @@ final class ChatModel: ObservableObject {
             default:
                 nil
             }
+        } else if cInfo.channelMsgInfo() != nil {
+            // Comments thread open. Inbound items lack channelMsgInfo on the wire (the
+            // carrier is local-only), so route by ci.parentChatItemId == parent.id.
+            switch secondaryIM?.secondaryIMFilter {
+            case let .some(.groupChannelMsgContext(parent)):
+                (cInfo.id == chatId && ci.parentChatItemId == parent.id) ? secondaryIM : nil
+            default:
+                nil
+            }
         } else {
             cInfo.id == chatId ? im : nil
         }
@@ -717,7 +779,7 @@ final class ChatModel: ObservableObject {
     func upsertChatItem(_ cInfo: ChatInfo, _ cItem: ChatItem) -> Bool {
         // update chat list
         var itemAdded: Bool = false
-        if cInfo.groupChatScope() == nil {
+        if cInfo.groupChatScope() == nil && cInfo.channelMsgInfo() == nil {
             if let chat = getChat(cInfo.id) {
                 if let pItem = chat.chatItems.last {
                     if pItem.id == cItem.id || (chatId == cInfo.id && im.reversedChatItems.first(where: { $0.id == cItem.id }) == nil) {
@@ -788,7 +850,7 @@ final class ChatModel: ObservableObject {
 
     func removeChatItem(_ cInfo: ChatInfo, _ cItem: ChatItem) {
         // update chat list
-        if cInfo.groupChatScope() == nil {
+        if cInfo.groupChatScope() == nil && cInfo.channelMsgInfo() == nil {
             if cItem.isRcvNew {
                 unreadCollector.changeUnreadCounter(cInfo.id, by: -1, unreadMentions: cItem.meta.userMention ? -1 : 0)
             }
@@ -1290,7 +1352,7 @@ final class ChatModel: ObservableObject {
     func removeWallpaperFilesFromChat(_ chat: Chat) {
         if case let .direct(contact) = chat.chatInfo {
             removeWallpaperFilesFromTheme(contact.uiThemes)
-        } else if case let .group(groupInfo, _) = chat.chatInfo {
+        } else if case let .group(groupInfo, _, _) = chat.chatInfo {
             removeWallpaperFilesFromTheme(groupInfo.uiThemes)
         }
     }
@@ -1356,7 +1418,7 @@ final class Chat: ObservableObject, Identifiable, ChatLike {
 
     var supportUnreadCount: Int {
         switch chatInfo {
-        case let .group(groupInfo, _):
+        case let .group(groupInfo, _, _):
             if groupInfo.canModerate {
                 return groupInfo.membersRequireAttention
             } else {

apps/ios/Shared/Model/SimpleXAPI.swift

@@ -450,8 +450,8 @@ func apiGetChatTagsAsync() async throws -> [ChatTag] {
 
 let loadItemsPerPage = 50
 
-func apiGetChat(chatId: ChatId, scope: GroupChatScope?, contentTag: MsgContentTag? = nil, pagination: ChatPagination, search: String = "") async throws -> (Chat, NavigationInfo) {
-    let r: ChatResponse0 = try await chatSendCmd(.apiGetChat(chatId: chatId, scope: scope, contentTag: contentTag, pagination: pagination, search: search))
+func apiGetChat(chatId: ChatId, scope: GroupChatScope?, contentTag: MsgContentTag? = nil, pagination: ChatPagination, search: String = "", parentItemId: Int64? = nil) async throws -> (Chat, NavigationInfo) {
+    let r: ChatResponse0 = try await chatSendCmd(.apiGetChat(chatId: chatId, scope: scope, contentTag: contentTag, pagination: pagination, search: search, parentItemId: parentItemId))
     if case let .apiChat(_, chat, navInfo) = r { return (Chat.init(chat), navInfo ?? NavigationInfo()) }
     throw r.unexpected
 }
@@ -547,6 +547,21 @@ func apiSendMessages(type: ChatType, id: Int64, scope: GroupChatScope?, sendAsGr
     return await processSendMessageCmd(toChatType: type, cmd: cmd)
 }
 
+// Send a comment on a channel post. The target chat is always a channel (group with useRelays);
+// the recipient is the relay, which forwards the comment to other subscribers.
+// Returns the locally-created ChatItem(s) for the sender's view; typically a singleton.
+func apiSendComment(groupId: Int64, parentItemId: Int64, live: Bool = false, ttl: Int? = nil, composedMessages: [ComposedMessage]) async -> [ChatItem]? {
+    let cmd: ChatCommand = .apiSendComment(groupId: groupId, parentItemId: parentItemId, live: live, ttl: ttl, composedMessages: composedMessages)
+    return await processSendMessageCmd(toChatType: .group, cmd: cmd)
+}
+
+// Toggle commentsDisabled on a channel post via XMsgUpdate.prefs. The Haskell handler
+// returns CRCmdOk; the local parent ChatItem update arrives via the owner's own echo
+// of XMsgUpdate.prefs through the standard receive pipeline. No item returned here.
+func apiSetCommentsDisabled(groupId: Int64, parentItemId: Int64, disabled: Bool) async throws {
+    try await sendCommandOkResp(.apiSetCommentsDisabled(groupId: groupId, parentItemId: parentItemId, disabled: disabled))
+}
+
 private func processSendMessageCmd(toChatType: ChatType, cmd: ChatCommand) async -> [ChatItem]? {
     let chatModel = ChatModel.shared
     let r: APIResult<ChatResponse1>
@@ -2919,7 +2934,7 @@ func groupChatItemsDeleted(_ user: UserRef, _ groupInfo: GroupInfo, _ chatItemID
         return
     }
     let im = ItemsModel.shared
-    let cInfo = ChatInfo.group(groupInfo: groupInfo, groupChatScope: nil)
+    let cInfo = ChatInfo.group(groupInfo: groupInfo, groupChatScope: nil, channelMsgInfo: nil)
     await MainActor.run {
         m.decreaseGroupReportsCounter(cInfo.id, by: chatItemIDs.count)
     }

apps/ios/Shared/Views/Chat/ChatInfoToolbar.swift

@@ -82,7 +82,7 @@ struct ChatInfoToolbar: View {
     }
 
     private var channelSubscriberCount: Int64? {
-        if case let .group(groupInfo, _) = chat.chatInfo,
+        if case let .group(groupInfo, _, _) = chat.chatInfo,
            groupInfo.useRelays,
            let count = groupInfo.groupSummary.publicMemberCount,
            count > 0 {

apps/ios/Shared/Views/Chat/ChatInfoView.swift

@@ -956,7 +956,7 @@ struct ChatWallpaperEditorSheet: View {
         self.chat = chat
         self.themes = if case let ChatInfo.direct(contact) = chat.chatInfo, let uiThemes = contact.uiThemes {
             uiThemes
-        } else if case let ChatInfo.group(groupInfo, _) = chat.chatInfo, let uiThemes = groupInfo.uiThemes {
+        } else if case let ChatInfo.group(groupInfo, _, _) = chat.chatInfo, let uiThemes = groupInfo.uiThemes {
             uiThemes
         } else {
             ThemeModeOverrides()
@@ -992,7 +992,7 @@ struct ChatWallpaperEditorSheet: View {
     private func themesFromChat(_ chat: Chat) -> ThemeModeOverrides {
         if case let ChatInfo.direct(contact) = chat.chatInfo, let uiThemes = contact.uiThemes {
             uiThemes
-        } else if case let ChatInfo.group(groupInfo, _) = chat.chatInfo, let uiThemes = groupInfo.uiThemes {
+        } else if case let ChatInfo.group(groupInfo, _, _) = chat.chatInfo, let uiThemes = groupInfo.uiThemes {
             uiThemes
         } else {
             ThemeModeOverrides()
@@ -1070,12 +1070,12 @@ struct ChatWallpaperEditorSheet: View {
                             chat.wrappedValue = Chat.init(chatInfo: ChatInfo.direct(contact: contact))
                             themes = themesFromChat(chat.wrappedValue)
                         }
-                    } else if case var ChatInfo.group(groupInfo, _) = chat.wrappedValue.chatInfo {
+                    } else if case var ChatInfo.group(groupInfo, _, _) = chat.wrappedValue.chatInfo {
                         groupInfo.uiThemes = changedThemesConstant
 
                         await MainActor.run {
-                            ChatModel.shared.updateChatInfo(ChatInfo.group(groupInfo: groupInfo, groupChatScope: nil))
-                            chat.wrappedValue = Chat.init(chatInfo: ChatInfo.group(groupInfo: groupInfo, groupChatScope: nil))
+                            ChatModel.shared.updateChatInfo(ChatInfo.group(groupInfo: groupInfo, groupChatScope: nil, channelMsgInfo: nil))
+                            chat.wrappedValue = Chat.init(chatInfo: ChatInfo.group(groupInfo: groupInfo, groupChatScope: nil, channelMsgInfo: nil))
                             themes = themesFromChat(chat.wrappedValue)
                         }
                     }

apps/ios/Shared/Views/Chat/ChatItem/CIRcvDecryptionError.swift

@@ -47,7 +47,7 @@ struct CIRcvDecryptionError: View {
         viewBody()
             .onAppear {
                 // for direct chat ConnectionStats are populated on opening chat, see ChatView onAppear
-                if case let .group(groupInfo, _) = chat.chatInfo,
+                if case let .group(groupInfo, _, _) = chat.chatInfo,
                    case let .groupRcv(groupMember) = chatItem.chatDir {
                     do {
                         let (member, stats) = try apiGroupMemberInfoSync(groupInfo.apiId, groupMember.groupMemberId)
@@ -85,7 +85,7 @@ struct CIRcvDecryptionError: View {
                 } else {
                     basicDecryptionErrorItem()
                 }
-            } else if case let .group(groupInfo, _) = chat.chatInfo,
+            } else if case let .group(groupInfo, _, _) = chat.chatInfo,
                       case let .groupRcv(groupMember) = chatItem.chatDir,
                       let mem = m.getGroupMember(groupMember.groupMemberId),
                       let memberStats = mem.wrapped.activeConn?.connectionStats {

apps/ios/Shared/Views/Chat/ChatItem/FramedItemView.swift

@@ -313,7 +313,7 @@ struct FramedItemView: View {
     
     private func membership() -> GroupMember? {
         switch chat.chatInfo {
-        case let .group(groupInfo: groupInfo, _): return groupInfo.membership
+        case let .group(groupInfo: groupInfo, _, _): return groupInfo.membership
         default: return nil
         }
     }

apps/ios/Shared/Views/Chat/ChatView.swift

@@ -85,7 +85,7 @@ struct ChatView: View {
     private var viewBody: some View {
         let cInfo = chat.chatInfo
         let memberSupportChat: (groupInfo: GroupInfo, member: GroupMember?)? =
-                if case let .group(groupInfo, .memberSupport(member)) = cInfo {
+                if case let .group(groupInfo, .memberSupport(member), _) = cInfo {
                     (groupInfo, member)
                 } else {
                     nil
@@ -156,7 +156,7 @@ struct ChatView: View {
                             showArchiveSelectedReports = true
                         },
                         moderateItems: {
-                            if case let .group(groupInfo, _) = chat.chatInfo {
+                            if case let .group(groupInfo, _, _) = chat.chatInfo {
                                 showModerateSelectedMessagesAlert(groupInfo)
                             }
                         },
@@ -167,7 +167,7 @@ struct ChatView: View {
             if im.showLoadingProgress == chat.id {
                 ProgressView().scaleEffect(2)
             }
-            if case let .group(groupInfo, _) = chat.chatInfo,
+            if case let .group(groupInfo, _, _) = chat.chatInfo,
                case let .groupChatScopeContext(groupScopeInfo) = im.secondaryIMFilter,
                case let .memberSupport(groupMember_) = groupScopeInfo,
                let groupMember = groupMember_ {
@@ -225,7 +225,7 @@ struct ChatView: View {
                     archiveReports(chat, selected.sorted(), false, deletedSelectedMessages)
                 }
             }
-            if case let ChatInfo.group(groupInfo, _) = chat.chatInfo, groupInfo.membership.memberActive {
+            if case let ChatInfo.group(groupInfo, _, _) = chat.chatInfo, groupInfo.membership.memberActive {
                 Button("For all moderators", role: .destructive) {
                     if let selected = selectedChatItems {
                         archiveReports(chat, selected.sorted(), true, deletedSelectedMessages)
@@ -236,7 +236,7 @@ struct ChatView: View {
         .appSheet(item: $selectedMember, onDismiss: {
             chatModel.secondaryIM = nil
         }) { member in
-            if case let .group(groupInfo, _) = chat.chatInfo {
+            if case let .group(groupInfo, _, _) = chat.chatInfo {
                 GroupMemberInfoView(
                     groupInfo: groupInfo,
                     chat: chat,
@@ -248,12 +248,12 @@ struct ChatView: View {
         }
         // it should be presented on top level in order to prevent a bug in SwiftUI on iOS 16 related to .focused() modifier in AddGroupMembersView's search field
         .appSheet(isPresented: $showAddMembersSheet) {
-            if case let .group(groupInfo, _) = cInfo {
+            if case let .group(groupInfo, _, _) = cInfo {
                 AddGroupMembersView(chat: chat, groupInfo: groupInfo)
             }
         }
         .appSheet(isPresented: $showGroupLinkSheet) {
-            if case let .group(groupInfo, _) = cInfo {
+            if case let .group(groupInfo, _, _) = cInfo {
                 GroupLinkView(
                     groupId: groupInfo.groupId,
                     groupLink: $groupLink,
@@ -292,7 +292,7 @@ struct ChatView: View {
         ) {
             if let groupInfo = cInfo.groupInfo {
                 SecondaryChatView(
-                    chat: Chat(chatInfo: .group(groupInfo: groupInfo, groupChatScope: userSupportScopeInfo), chatItems: [], chatStats: ChatStats()),
+                    chat: Chat(chatInfo: .group(groupInfo: groupInfo, groupChatScope: userSupportScopeInfo, channelMsgInfo: nil), chatItems: [], chatStats: ChatStats()),
                     scrollToItemId: $scrollToItemId
                 )
             }
@@ -314,7 +314,7 @@ struct ChatView: View {
                 }
             }
             // if this is the main chat of the group with the pending member (knocking)
-            if case let .group(groupInfo, nil) = chat.chatInfo,
+            if case let .group(groupInfo, nil, _) = chat.chatInfo,
                groupInfo.membership.memberPending {
                 ItemsModel.loadSecondaryChat(chat.id, chatFilter: .groupChatScopeContext(groupScopeInfo: userSupportScopeInfo)) {
                     showUserSupportChatSheet = true
@@ -492,7 +492,7 @@ struct ChatView: View {
                     onSearch: { focusSearch() }
                 )
             }
-        } else if case let .group(groupInfo, _) = cInfo {
+        } else if case let .group(groupInfo, _, _) = cInfo {
             Button {
                 Task { await chatModel.loadGroupMembers(groupInfo) { showChatInfoSheet = true } }
             } label: {
@@ -508,7 +508,7 @@ struct ChatView: View {
                     groupInfo: Binding(
                         get: { groupInfo },
                         set: { gInfo in
-                            chat.chatInfo = .group(groupInfo: gInfo, groupChatScope: nil)
+                            chat.chatInfo = .group(groupInfo: gInfo, groupChatScope: nil, channelMsgInfo: nil)
                             chat.created = Date.now
                         }
                     ),
@@ -588,7 +588,7 @@ struct ChatView: View {
                         Image(systemName: "ellipsis")
                     }
                 }
-            case let .group(groupInfo, _):
+            case let .group(groupInfo, _, _):
                 HStack {
                     contentFilterMenu(withLabel: false)
                     Menu {
@@ -736,7 +736,7 @@ struct ChatView: View {
                     }
                 }
             }
-            if case let .group(groupInfo, _) = cInfo, groupInfo.useRelays {
+            if case let .group(groupInfo, _, _) = cInfo, groupInfo.useRelays {
                 Task { await chatModel.loadGroupMembers(groupInfo) }
                 if groupInfo.membership.memberRole == .owner {
                     Task {
@@ -1047,7 +1047,7 @@ struct ChatView: View {
                         return ("SimpleX address", connLink)
                     }
                 }
-            case let .group(groupInfo, _):
+            case let .group(groupInfo, _, _):
                 if !groupInfo.nextConnectPrepared {
                     if let pg = groupInfo.preparedGroup {
                         let connLink = pg.connLinkToConnect.simplexChatUri()
@@ -1080,7 +1080,7 @@ struct ChatView: View {
                 } else {
                     "Your contact"
                 }
-            case let .group(groupInfo, _):
+            case let .group(groupInfo, _, _):
                 switch groupInfo.businessChat?.chatType {
                 case .none:
                     if groupInfo.nextConnectPrepared {
@@ -1116,7 +1116,7 @@ struct ChatView: View {
             } else {
                 nil
             }
-        case let .group(groupInfo, _):
+        case let .group(groupInfo, _, _):
             if groupInfo.useRelays {
                 nil
             } else {
@@ -1419,7 +1419,7 @@ struct ChatView: View {
 
     private func addMembersButton() -> some View {
         Button {
-            if case let .group(gInfo, _) = chat.chatInfo {
+            if case let .group(gInfo, _, _) = chat.chatInfo {
                 Task { await chatModel.loadGroupMembers(gInfo) { showAddMembersSheet = true } }
             }
         } label: {
@@ -1429,7 +1429,7 @@ struct ChatView: View {
 
     private func groupLinkButton() -> some View {
         Button {
-            if case let .group(gInfo, _) = chat.chatInfo {
+            if case let .group(gInfo, _, _) = chat.chatInfo {
                 Task {
                     do {
                         if let gLink = try apiGetGroupLink(gInfo.groupId) {
@@ -1443,7 +1443,7 @@ struct ChatView: View {
                 }
             }
         } label: {
-            if case let .group(gInfo, _) = chat.chatInfo, gInfo.useRelays {
+            if case let .group(gInfo, _, _) = chat.chatInfo, gInfo.useRelays {
                 Label("Channel link", systemImage: "link")
             } else {
                 Label("Group link", systemImage: "link.badge.plus")
@@ -1916,7 +1916,7 @@ struct ChatView: View {
         ) -> some View {
             let bottomPadding: Double = itemSeparation.largeGap ? 10 : 2
             if case .channelRcv = ci.chatDir,
-               case let .group(groupInfo, _) = chat.chatInfo {
+               case let .group(groupInfo, _, _) = chat.chatInfo {
                 if showAvatar {
                     VStack(alignment: .leading, spacing: 4) {
                         if ci.content.showMemberName {
@@ -1983,7 +1983,7 @@ struct ChatView: View {
                     .padding(.bottom, bottomPadding)
                 }
             } else if case let .groupRcv(member) = ci.chatDir,
-               case let .group(groupInfo, _) = chat.chatInfo {
+               case let .group(groupInfo, _, _) = chat.chatInfo {
                 if showAvatar {
                     VStack(alignment: .leading, spacing: 4) {
                         if ci.content.showMemberName {
@@ -2196,7 +2196,7 @@ struct ChatView: View {
                             self.archivingReports = []
                         }
                     }
-                    if case let ChatInfo.group(groupInfo, _) = chat.chatInfo, groupInfo.membership.memberActive {
+                    if case let ChatInfo.group(groupInfo, _, _) = chat.chatInfo, groupInfo.membership.memberActive {
                         Button("For all moderators", role: .destructive) {
                             if let reports = self.archivingReports {
                                 archiveReports(chat, reports.sorted(), true)
@@ -2246,7 +2246,7 @@ struct ChatView: View {
                         })
                     }
                     switch chat.chatInfo {
-                    case let .group(groupInfo, _):
+                    case let .group(groupInfo, _, _):
                         v.contextMenu {
                             ReactionContextMenu(
                                 groupInfo: groupInfo,
@@ -2269,7 +2269,7 @@ struct ChatView: View {
 
         @ViewBuilder
         private func menu(_ ci: ChatItem, _ range: ClosedRange<Int>?, live: Bool) -> some View {
-            if case let .group(gInfo, _) = chat.chatInfo, ci.isReport, ci.meta.itemDeleted == nil {
+            if case let .group(gInfo, _, _) = chat.chatInfo, ci.isReport, ci.meta.itemDeleted == nil {
                 if ci.chatDir != .groupSnd, gInfo.membership.memberRole >= .moderator {
                     archiveReportButton(ci)
                 }
@@ -2328,7 +2328,7 @@ struct ChatView: View {
                     if let (groupInfo, _) = ci.memberToModerate(chat.chatInfo) {
                         moderateButton(ci, groupInfo)
                     } else if ci.meta.itemDeleted == nil && chat.groupFeatureEnabled(.reports),
-                              case let .group(gInfo, _) = chat.chatInfo,
+                              case let .group(gInfo, _, _) = chat.chatInfo,
                               gInfo.membership.memberRole == .member
                                 && !live
                                 && composeState.voiceMessageRecordingState == .noRecording {
@@ -2557,7 +2557,7 @@ struct ChatView: View {
                         await MainActor.run {
                             chatItemInfo = ciInfo
                         }
-                        if case let .group(gInfo, _) = chat.chatInfo {
+                        if case let .group(gInfo, _, _) = chat.chatInfo {
                             await m.loadGroupMembers(gInfo)
                         }
                     } catch let error {
@@ -3054,7 +3054,7 @@ private func buildTheme() -> AppTheme {
     if let cId = ChatModel.shared.chatId, let chat = ChatModel.shared.getChat(cId) {
         let perChatTheme = if case let .direct(contact) = chat.chatInfo {
             contact.uiThemes?.preferredMode(!AppTheme.shared.colors.isLight)
-        } else if case let .group(groupInfo, _) = chat.chatInfo {
+        } else if case let .group(groupInfo, _, _) = chat.chatInfo {
             groupInfo.uiThemes?.preferredMode(!AppTheme.shared.colors.isLight)
         } else {
             nil as ThemeModeOverride?
@@ -3208,7 +3208,7 @@ func updateChatSettings(_ chat: Chat, chatSettings: ChatSettings) {
                 case var .direct(contact):
                     contact.chatSettings = chatSettings
                     ChatModel.shared.updateContact(contact)
-                case var .group(groupInfo, _):
+                case var .group(groupInfo, _, _):
                     groupInfo.chatSettings = chatSettings
                     ChatModel.shared.updateGroup(groupInfo)
                 default: ()

apps/ios/Shared/Views/Chat/Group/GroupChatInfoView.swift

@@ -699,7 +699,7 @@ struct GroupChatInfoView: View {
             let scopeInfo: GroupChatScopeInfo = .memberSupport(groupMember_: nil)
             NavigationLink(isActive: $navLinkActive) {
                 SecondaryChatView(
-                    chat: Chat(chatInfo: .group(groupInfo: groupInfo, groupChatScope: scopeInfo), chatItems: [], chatStats: ChatStats()),
+                    chat: Chat(chatInfo: .group(groupInfo: groupInfo, groupChatScope: scopeInfo, channelMsgInfo: nil), chatItems: [], chatStats: ChatStats()),
                     scrollToItemId: $scrollToItemId
                 )
             } label: {
@@ -750,7 +750,7 @@ struct GroupChatInfoView: View {
         var body: some View {
             NavigationLink(isActive: $navLinkActive) {
                 SecondaryChatView(
-                    chat: Chat(chatInfo: .group(groupInfo: groupInfo, groupChatScope: .reports), chatItems: [], chatStats: ChatStats()),
+                    chat: Chat(chatInfo: .group(groupInfo: groupInfo, groupChatScope: .reports, channelMsgInfo: nil), chatItems: [], chatStats: ChatStats()),
                     scrollToItemId: $scrollToItemId
                 )
             } label: {

apps/ios/Shared/Views/Chat/Group/GroupMemberInfoView.swift

@@ -352,7 +352,7 @@ struct GroupMemberInfoView: View {
             }
         }
         .onChange(of: chat.chatInfo) { c in
-            if case let .group(gI, _) = chat.chatInfo {
+            if case let .group(gI, _, _) = chat.chatInfo {
                 groupInfo = gI
             }
         }
@@ -566,7 +566,7 @@ struct GroupMemberInfoView: View {
             let scopeInfo: GroupChatScopeInfo = .memberSupport(groupMember_: member.wrapped)
             NavigationLink(isActive: $navLinkActive) {
                 SecondaryChatView(
-                    chat: Chat(chatInfo: .group(groupInfo: groupInfo, groupChatScope: scopeInfo), chatItems: [], chatStats: ChatStats()),
+                    chat: Chat(chatInfo: .group(groupInfo: groupInfo, groupChatScope: scopeInfo, channelMsgInfo: nil), chatItems: [], chatStats: ChatStats()),
                     scrollToItemId: $scrollToItemId
                 )
             } label: {

apps/ios/Shared/Views/Chat/Group/MemberSupportView.swift

@@ -83,7 +83,7 @@ struct MemberSupportView: View {
 
                 NavigationLink(isActive: $memberSupportChatNavLinkActive) {
                     SecondaryChatView(
-                        chat: Chat(chatInfo: .group(groupInfo: groupInfo, groupChatScope: scopeInfo), chatItems: [], chatStats: ChatStats()),
+                        chat: Chat(chatInfo: .group(groupInfo: groupInfo, groupChatScope: scopeInfo, channelMsgInfo: nil), chatItems: [], chatStats: ChatStats()),
                         scrollToItemId: $scrollToItemId
                     )
                 } label: {

apps/ios/Shared/Views/Chat/Group/SecondaryChatView.swift

@@ -35,7 +35,7 @@ struct SecondaryChatView: View {
 #Preview {
     SecondaryChatView(
         chat: Chat(
-            chatInfo: .group(groupInfo: GroupInfo.sampleData, groupChatScope: .memberSupport(groupMember_: GroupMember.sampleData)),
+            chatInfo: .group(groupInfo: GroupInfo.sampleData, groupChatScope: .memberSupport(groupMember_: GroupMember.sampleData), channelMsgInfo: nil),
             chatItems: [],
             chatStats: ChatStats()
         ),

apps/ios/Shared/Views/Chat/SelectableChatItemToolbars.swift

@@ -116,7 +116,7 @@ struct SelectedItemsBottomToolbar: View {
         deleteCountProhibited = count == 0 || count > 200
         forwardCountProhibited = count == 0 || count > 20
         canModerate = possibleToModerate(chatInfo)
-        let groupInfo: GroupInfo? = if case let ChatInfo.group(groupInfo: info, _) = chatInfo {
+        let groupInfo: GroupInfo? = if case let ChatInfo.group(groupInfo: info, _, _) = chatInfo {
             info
         } else {
              nil
@@ -145,7 +145,7 @@ struct SelectedItemsBottomToolbar: View {
 
     private func possibleToModerate(_ chatInfo: ChatInfo) -> Bool {
         return switch chatInfo {
-        case let .group(groupInfo, _):
+        case let .group(groupInfo, _, _):
             groupInfo.membership.memberRole >= .moderator
         default: false
         }

apps/ios/Shared/Views/ChatList/ChatListNavLink.swift

@@ -67,7 +67,7 @@ struct ChatListNavLink: View {
             switch chat.chatInfo {
             case let .direct(contact):
                 contactNavLink(contact)
-            case let .group(groupInfo, _):
+            case let .group(groupInfo, _, _):
                 groupNavLink(groupInfo)
             case let .local(noteFolder):
                 noteFolderNavLink(noteFolder)

apps/ios/Shared/Views/ChatList/ChatListView.swift

@@ -952,17 +952,17 @@ func presetTagMatchesChat(_ tag: PresetTag, _ chatInfo: ChatInfo, _ chatStats: C
         case let .direct(contact): !contact.isContactCard && !contact.chatDeleted
         case .contactRequest: true
         case .contactConnection: true
-        case let .group(groupInfo, _): groupInfo.businessChat?.chatType == .customer
+        case let .group(groupInfo, _, _): groupInfo.businessChat?.chatType == .customer
         default: false
         }
     case .groups:
         switch chatInfo {
-        case let .group(groupInfo, _): groupInfo.businessChat == nil && !groupInfo.isChannel
+        case let .group(groupInfo, _, _): groupInfo.businessChat == nil && !groupInfo.isChannel
         default: false
         }
     case .channels:
         switch chatInfo {
-        case let .group(groupInfo, _): groupInfo.isChannel
+        case let .group(groupInfo, _, _): groupInfo.isChannel
         default: false
         }
     case .business:

apps/ios/Shared/Views/ChatList/ChatPreviewView.swift

@@ -142,7 +142,7 @@ struct ChatPreviewView: View {
             } else {
                 EmptyView()
             }
-        case let .group(groupInfo, _):
+        case let .group(groupInfo, _, _):
             switch (groupInfo.membership.memberStatus) {
             case .memRejected: inactiveIcon()
             case .memLeft: inactiveIcon()
@@ -174,7 +174,7 @@ struct ChatPreviewView: View {
                 ? theme.colors.secondary
                 : nil
             previewTitle(contact.verified == true ? verifiedIcon + t : t).foregroundColor(color)
-        case let .group(groupInfo, _):
+        case let .group(groupInfo, _, _):
             let color = if deleting {
                 theme.colors.secondary
             } else {
@@ -377,7 +377,7 @@ struct ChatPreviewView: View {
             } else {
                 nil
             }
-        case let .group(groupInfo, _):
+        case let .group(groupInfo, _, _):
             if groupInfo.nextConnectPrepared {
                 if groupInfo.businessChat?.chatType == .business {
                     Text("Open to connect")

apps/ios/Shared/Views/NewChat/AddGroupView.swift

@@ -204,7 +204,7 @@ struct AddGroupView: View {
             Task {
                 await m.loadGroupMembers(gInfo)
             }
-            let c = Chat(chatInfo: .group(groupInfo: gInfo, groupChatScope: nil), chatItems: [])
+            let c = Chat(chatInfo: .group(groupInfo: gInfo, groupChatScope: nil, channelMsgInfo: nil), chatItems: [])
             m.addChat(c)
             withAnimation {
                 groupInfo = gInfo

apps/ios/Shared/Views/NewChat/NewChatView.swift

@@ -1202,7 +1202,7 @@ private func showPrepareGroupAlert(
                     let chat = try await apiPrepareGroup(connLink: connectionLink, directLink: groupShortLinkInfo?.direct ?? true, groupShortLinkData: groupShortLinkData)
                     await MainActor.run {
                         if let relays = groupShortLinkInfo?.groupRelays, !relays.isEmpty,
-                           case let .group(gInfo, _) = chat.chatInfo {
+                           case let .group(gInfo, _, _) = chat.chatInfo {
                             ChatModel.shared.channelRelayHostnames[gInfo.groupId] = relays
                         }
                         ChatModel.shared.addChat(Chat(chat))

apps/ios/SimpleXChat/ChatTypes.swift

@@ -1434,7 +1434,7 @@ public enum GroupFeatureEnabled: String, Codable, Identifiable, Hashable {
 // Spec: spec/state.md#ChatInfo
 public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
     case direct(contact: Contact)
-    case group(groupInfo: GroupInfo, groupChatScope: GroupChatScopeInfo?)
+    case group(groupInfo: GroupInfo, groupChatScope: GroupChatScopeInfo?, channelMsgInfo: ChannelMsgInfo?)
     case local(noteFolder: NoteFolder)
     case contactRequest(contactRequest: UserContactRequest)
     case contactConnection(contactConnection: PendingContactConnection)
@@ -1448,7 +1448,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
         get {
             switch self {
             case let .direct(contact): return contact.localDisplayName
-            case let .group(groupInfo, _): return groupInfo.localDisplayName
+            case let .group(groupInfo, _, _): return groupInfo.localDisplayName
             case .local: return ""
             case let .contactRequest(contactRequest): return contactRequest.localDisplayName
             case let .contactConnection(contactConnection): return contactConnection.localDisplayName
@@ -1461,7 +1461,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
         get {
             switch self {
             case let .direct(contact): return contact.displayName
-            case let .group(groupInfo, _): return groupInfo.displayName
+            case let .group(groupInfo, _, _): return groupInfo.displayName
             case .local: return ChatInfo.privateNotesChatName
             case let .contactRequest(contactRequest): return contactRequest.displayName
             case let .contactConnection(contactConnection): return contactConnection.displayName
@@ -1474,7 +1474,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
         get {
             switch self {
             case let .direct(contact): return contact.fullName
-            case let .group(groupInfo, _): return groupInfo.fullName
+            case let .group(groupInfo, _, _): return groupInfo.fullName
             case .local: return ""
             case let .contactRequest(contactRequest): return contactRequest.fullName
             case let .contactConnection(contactConnection): return contactConnection.fullName
@@ -1486,7 +1486,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
     public var shortDescr: String? {
         switch self {
         case let .direct(contact): contact.profile.shortDescr
-        case let .group(groupInfo, _): groupInfo.groupProfile.shortDescr
+        case let .group(groupInfo, _, _): groupInfo.groupProfile.shortDescr
         case .local: nil
         case let .contactRequest(contactRequest): contactRequest.profile.shortDescr
         case let .contactConnection(contactConnection): nil
@@ -1498,7 +1498,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
         get {
             switch self {
             case let .direct(contact): return contact.image
-            case let .group(groupInfo, _): return groupInfo.image
+            case let .group(groupInfo, _, _): return groupInfo.image
             case .local: return nil
             case let .contactRequest(contactRequest): return contactRequest.image
             case let .contactConnection(contactConnection): return contactConnection.image
@@ -1511,7 +1511,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
         get {
             switch self {
             case let .direct(contact): return contact.localAlias
-            case let .group(groupInfo, _): return groupInfo.localAlias
+            case let .group(groupInfo, _, _): return groupInfo.localAlias
             case .local: return ""
             case let .contactRequest(contactRequest): return contactRequest.localAlias
             case let .contactConnection(contactConnection): return contactConnection.localAlias
@@ -1524,7 +1524,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
         get {
             switch self {
             case let .direct(contact): return contact.id
-            case let .group(groupInfo, _): return groupInfo.id
+            case let .group(groupInfo, _, _): return groupInfo.id
             case let .local(noteFolder): return noteFolder.id
             case let .contactRequest(contactRequest): return contactRequest.id
             case let .contactConnection(contactConnection): return contactConnection.id
@@ -1550,7 +1550,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
         get {
             switch self {
             case let .direct(contact): return contact.apiId
-            case let .group(groupInfo, _): return groupInfo.apiId
+            case let .group(groupInfo, _, _): return groupInfo.apiId
             case let .local(noteFolder): return noteFolder.apiId
             case let .contactRequest(contactRequest): return contactRequest.apiId
             case let .contactConnection(contactConnection): return contactConnection.apiId
@@ -1563,7 +1563,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
         get {
             switch self {
             case let .direct(contact): return contact.ready
-            case let .group(groupInfo, _): return groupInfo.ready
+            case let .group(groupInfo, _, _): return groupInfo.ready
             case let .local(noteFolder): return noteFolder.ready
             case let .contactRequest(contactRequest): return contactRequest.ready
             case let .contactConnection(contactConnection): return contactConnection.ready
@@ -1575,7 +1575,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
     public var sndReady: Bool {
         switch self {
         case let .direct(contact): contact.sndReady
-        case let .group(groupInfo, groupScope):
+        case let .group(groupInfo, groupScope, _):
             groupInfo.membership.memberActive
                 && (groupScope != nil || (!groupInfo.membership.memberPending && groupInfo.membership.memberRole != .observer))
         case .local: true
@@ -1598,7 +1598,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
         get {
             switch self {
             case let .direct(contact): return contact.sendMsgToConnect
-            case let .group(groupInfo, _): return groupInfo.nextConnectPrepared
+            case let .group(groupInfo, _, _): return groupInfo.nextConnectPrepared
             default: return false
             }
         }
@@ -1608,7 +1608,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
         get {
             switch self {
             case let .direct(contact): return contact.nextConnectPrepared
-            case let .group(groupInfo, _): return groupInfo.nextConnectPrepared
+            case let .group(groupInfo, _, _): return groupInfo.nextConnectPrepared
             default: return false
             }
         }
@@ -1618,7 +1618,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
         get {
             switch self {
             case let .direct(contact): return contact.profileChangeProhibited
-            case let .group(groupInfo, _): return groupInfo.profileChangeProhibited
+            case let .group(groupInfo, _, _): return groupInfo.profileChangeProhibited
             default: return false
             }
         }
@@ -1634,7 +1634,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
                 if contact.activeConn?.connectionStats?.ratchetSyncSendProhibited ?? false { return ("not synchronized", nil) }
                 if contact.activeConn?.connDisabled ?? true { return ("contact disabled", nil) }
                 return nil
-            case let .group(groupInfo, groupChatScope):
+            case let .group(groupInfo, groupChatScope, _):
                 if groupInfo.membership.memberActive {
                     switch(groupChatScope) {
                     case .none:
@@ -1682,7 +1682,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
         get {
             switch self {
             case let .direct(contact): return contact.contactConnIncognito
-            case let .group(groupInfo, _): return groupInfo.membership.memberIncognito
+            case let .group(groupInfo, _, _): return groupInfo.membership.memberIncognito
             case .local: return false
             case .contactRequest: return false
             case let .contactConnection(contactConnection): return contactConnection.incognito
@@ -1707,7 +1707,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
 
     public var groupInfo: GroupInfo? {
         switch self {
-        case let .group(groupInfo, _): return groupInfo
+        case let .group(groupInfo, _, _): return groupInfo
         default: return nil
         }
     }
@@ -1729,7 +1729,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
             case .files: return cups.files.enabled.forUser
             case .calls: return cups.calls.enabled.forUser
             }
-        case let .group(groupInfo, _):
+        case let .group(groupInfo, _, _):
             let prefs = groupInfo.fullGroupPreferences
             switch feature {
             case .timedMessages: return prefs.timedMessages.on
@@ -1757,7 +1757,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
         case let .direct(contact):
             let pref = contact.mergedPreferences.timedMessages
             return pref.enabled.forUser ? pref.userPreference.preference.ttl : nil
-        case let .group(groupInfo, _):
+        case let .group(groupInfo, _, _):
             let pref = groupInfo.fullGroupPreferences.timedMessages
             return pref.on ? pref.ttl : nil
         default:
@@ -1782,7 +1782,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
             } else {
                 return .other
             }
-        case let .group(groupInfo, _):
+        case let .group(groupInfo, _, _):
             if !groupInfo.fullGroupPreferences.voice.on(for: groupInfo.membership) {
                 return .groupOwnerCan
             } else {
@@ -1816,7 +1816,16 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
 
     public func groupChatScope() -> GroupChatScope? {
         switch self {
-        case let .group(_, groupChatScope): groupChatScope?.toChatScope()
+        case let .group(_, groupChatScope, _): groupChatScope?.toChatScope()
+        default: nil
+        }
+    }
+
+    // Local-only carrier for the comments-thread view, embedded by
+    // ItemsModel.loadSecondaryChat. Nil for main-chat / member-support / direct / etc.
+    public func channelMsgInfo() -> ChannelMsgInfo? {
+        switch self {
+        case let .group(_, _, channelMsgInfo): channelMsgInfo
         default: nil
         }
     }
@@ -1848,7 +1857,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
     public var chatSettings: ChatSettings? {
         switch self {
         case let .direct(contact): return contact.chatSettings
-        case let .group(groupInfo, _): return groupInfo.chatSettings
+        case let .group(groupInfo, _, _): return groupInfo.chatSettings
         default: return nil
         }
     }
@@ -1864,7 +1873,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
     public var useCommands: Bool {
         switch self {
         case let .direct(c): c.isBot
-        case let .group(g, _): (g.groupProfile.groupPreferences?.commands?.count ?? 0) > 0
+        case let .group(g, _, _): (g.groupProfile.groupPreferences?.commands?.count ?? 0) > 0
         default: false
         }
     }
@@ -1872,7 +1881,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
     public var menuCommands: [ChatBotCommand] {
         switch self {
         case let .direct(c): c.isBot ? c.profile.preferences?.commands ?? [] : []
-        case let .group(g, _): g.groupProfile.groupPreferences?.commands ?? []
+        case let .group(g, _, _): g.groupProfile.groupPreferences?.commands ?? []
         default: []
         }
     }
@@ -1880,7 +1889,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
     public var chatTags: [Int64]? {
         switch self {
         case let .direct(contact): return contact.chatTags
-        case let .group(groupInfo, _): return groupInfo.chatTags
+        case let .group(groupInfo, _, _): return groupInfo.chatTags
         default: return nil
         }
     }
@@ -1888,7 +1897,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
     public var chatTs: Date {
         switch self {
         case let .direct(contact): return contact.chatTs ?? contact.updatedAt
-        case let .group(groupInfo, _): return groupInfo.chatTs ?? groupInfo.updatedAt
+        case let .group(groupInfo, _, _): return groupInfo.chatTs ?? groupInfo.updatedAt
         case let .local(noteFolder): return noteFolder.chatTs
         case let .contactRequest(contactRequest): return contactRequest.updatedAt
         case let .contactConnection(contactConnection): return contactConnection.updatedAt
@@ -1904,7 +1913,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
             } else {
                 ChatTTL.userDefault(globalTTL)
             }
-        case let .group(groupInfo, _):
+        case let .group(groupInfo, _, _):
             return if let ciTTL = groupInfo.chatItemTTL {
                 ChatTTL.chat(ChatItemTTL(ciTTL))
             } else {
@@ -1924,7 +1933,7 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
 
     public static var sampleData: ChatInfo.SampleData = SampleData(
         direct: ChatInfo.direct(contact: Contact.sampleData),
-        group: ChatInfo.group(groupInfo: GroupInfo.sampleData, groupChatScope: nil),
+        group: ChatInfo.group(groupInfo: GroupInfo.sampleData, groupChatScope: nil, channelMsgInfo: nil),
         local: ChatInfo.local(noteFolder: NoteFolder.sampleData),
         contactRequest: ChatInfo.contactRequest(contactRequest: UserContactRequest.sampleData),
         contactConnection: ChatInfo.contactConnection(contactConnection: PendingContactConnection.getSampleData())
@@ -2013,6 +2022,19 @@ public enum GroupChatScopeInfo: Decodable, Hashable {
     }
 }
 
+// Local-only carrier for the comments-thread view; not present on the wire.
+// Embedded in `ChatInfo.group`'s third associated value by `ItemsModel.loadSecondaryChat`
+// after fetching the chat by parent= pagination. See spec/state.md#ChannelMsgInfo.
+public struct ChannelMsgInfo: Decodable, Hashable {
+    public var channelMsgItem: ChatItem
+    public var channelMsgSharedId: String
+
+    public init(channelMsgItem: ChatItem, channelMsgSharedId: String) {
+        self.channelMsgItem = channelMsgItem
+        self.channelMsgSharedId = channelMsgSharedId
+    }
+}
+
 public struct Contact: Identifiable, Decodable, NamedChat, Hashable {
     public var contactId: Int64
     var localDisplayName: ContactName
@@ -3239,7 +3261,7 @@ public struct CIReaction: Decodable, Hashable {
 }
 
 public struct ChatItem: Identifiable, Decodable, Hashable {
-    public init(chatDir: CIDirection, meta: CIMeta, content: CIContent, formattedText: [FormattedText]? = nil, mentions: [String: CIMention]? = nil, quotedItem: CIQuote? = nil, reactions: [CIReactionCount] = [], file: CIFile? = nil) {
+    public init(chatDir: CIDirection, meta: CIMeta, content: CIContent, formattedText: [FormattedText]? = nil, mentions: [String: CIMention]? = nil, quotedItem: CIQuote? = nil, reactions: [CIReactionCount] = [], file: CIFile? = nil, parentChatItemId: Int64? = nil, commentsTotal: Int = 0, commentsDisabled: Bool = false) {
         self.chatDir = chatDir
         self.meta = meta
         self.content = content
@@ -3248,6 +3270,9 @@ public struct ChatItem: Identifiable, Decodable, Hashable {
         self.quotedItem = quotedItem
         self.reactions = reactions
         self.file = file
+        self.parentChatItemId = parentChatItemId
+        self.commentsTotal = commentsTotal
+        self.commentsDisabled = commentsDisabled
     }
 
     public var chatDir: CIDirection
@@ -3258,6 +3283,12 @@ public struct ChatItem: Identifiable, Decodable, Hashable {
     public var quotedItem: CIQuote?
     public var reactions: [CIReactionCount]
     public var file: CIFile?
+    // Slice-1 channel-comments fields. On the wire these live inside the `meta`
+    // object (Haskell `CIMeta`); for iOS caller ergonomics they are hoisted to
+    // ChatItem level. See spec/state.md#ChatItem and plan §5.1 item 4.
+    public var parentChatItemId: Int64? = nil
+    public var commentsTotal: Int = 0
+    public var commentsDisabled: Bool = false
 
     public var viewTimestamp = Date.now
     public var isLiveDummy: Bool = false
@@ -3266,8 +3297,37 @@ public struct ChatItem: Identifiable, Decodable, Hashable {
         case chatDir, meta, content, formattedText, mentions, quotedItem, reactions, file
     }
 
+    private enum MetaForwardKeys: String, CodingKey {
+        case parentChatItemId, commentsTotal, commentsDisabled
+    }
+
+    public init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        self.chatDir = try container.decode(CIDirection.self, forKey: .chatDir)
+        self.meta = try container.decode(CIMeta.self, forKey: .meta)
+        self.content = try container.decode(CIContent.self, forKey: .content)
+        self.formattedText = try container.decodeIfPresent([FormattedText].self, forKey: .formattedText)
+        self.mentions = try container.decodeIfPresent([String: CIMention].self, forKey: .mentions)
+        self.quotedItem = try container.decodeIfPresent(CIQuote.self, forKey: .quotedItem)
+        self.reactions = try container.decodeIfPresent([CIReactionCount].self, forKey: .reactions) ?? []
+        self.file = try container.decodeIfPresent(CIFile.self, forKey: .file)
+        // Hoist the three channel-comments fields from the nested `meta` object.
+        // Defaults mirror Haskell `omittedField`: nil / 0 / false.
+        let metaContainer = try container.nestedContainer(keyedBy: MetaForwardKeys.self, forKey: .meta)
+        self.parentChatItemId = try metaContainer.decodeIfPresent(Int64.self, forKey: .parentChatItemId)
+        self.commentsTotal = try metaContainer.decodeIfPresent(Int.self, forKey: .commentsTotal) ?? 0
+        self.commentsDisabled = try metaContainer.decodeIfPresent(Bool.self, forKey: .commentsDisabled) ?? false
+    }
+
     public var id: Int64 { meta.itemId }
 
+    // Subscriber-view helper: true iff this item came in on the channel-cast direction.
+    // Owner-side composers determine the equivalent locally (groupInfo.useRelays && chatDir == .groupSnd).
+    public var isChannelPost: Bool {
+        if case .channelRcv = chatDir { return true }
+        return false
+    }
+
     public var viewId: String { "\(meta.itemId) \(viewTimestamp.timeIntervalSince1970)" }
 
     public var timestampText: Text { meta.timestampText }
@@ -3444,12 +3504,12 @@ public struct ChatItem: Identifiable, Decodable, Hashable {
 
     public func memberToModerate(_ chatInfo: ChatInfo) -> (GroupInfo, GroupMember?)? {
         switch (chatInfo, chatDir) {
-        case let (.group(groupInfo, _), .groupRcv(groupMember)):
+        case let (.group(groupInfo, _, _), .groupRcv(groupMember)):
             let m = groupInfo.membership
             return m.memberRole >= .moderator && m.memberRole >= groupMember.memberRole && meta.itemDeleted == nil
                     ? (groupInfo, groupMember)
                     : nil
-        case let (.group(groupInfo, _), .groupSnd):
+        case let (.group(groupInfo, _, _), .groupSnd):
             let m = groupInfo.membership
             return m.memberRole >= .moderator ? (groupInfo, nil) : nil
         case (.group, .channelRcv):
@@ -3718,6 +3778,9 @@ public struct CIMeta: Decodable, Hashable {
     public var deletable: Bool
     public var editable: Bool
     public var showGroupAsSender: Bool
+    // Wire field present once an item has been propagated to the relay/peer.
+    // Optional because items in "sending" state may not yet have one.
+    public var itemSharedMsgId: String? = nil
 
     public var timestampText: Text { Text(formatTimestampMeta(itemTs)) }
     public var recent: Bool { updatedAt + 10 > .now }

apps/ios/SimpleXChat/ChatUtils.swift

@@ -14,7 +14,7 @@ public protocol ChatLike {
 
 extension ChatLike {
     public func groupFeatureEnabled(_ feature: GroupFeature) -> Bool {
-        if case let .group(groupInfo, _) = self.chatInfo {
+        if case let .group(groupInfo, _, _) = self.chatInfo {
             let p = groupInfo.fullGroupPreferences
             return switch feature {
             case .timedMessages: p.timedMessages.on
@@ -93,7 +93,7 @@ private func canForwardToChat(_ cInfo: ChatInfo) -> Bool {
 public func chatIconName(_ cInfo: ChatInfo) -> String {
     switch cInfo {
     case let .direct(contact): contact.chatIconName
-    case let .group(groupInfo, _): groupInfo.chatIconName
+    case let .group(groupInfo, _, _): groupInfo.chatIconName
     case .local: "folder.circle.fill"
     case .contactRequest: "person.crop.circle.fill"
     default:  "circle.fill"

apps/ios/SimpleXChat/Notifications.swift

@@ -66,7 +66,7 @@ public func createContactConnectedNtf(_ user: any UserLike, _ contact: Contact,
 public func createMessageReceivedNtf(_ user: any UserLike, _ cInfo: ChatInfo, _ cItem: ChatItem, _ badgeCount: Int) -> UNMutableNotificationContent {
     let previewMode = ntfPreviewModeGroupDefault.get()
     var title: String
-    if case let .group(groupInfo, _) = cInfo, case let .groupRcv(groupMember) = cItem.chatDir {
+    if case let .group(groupInfo, _, _) = cInfo, case let .groupRcv(groupMember) = cItem.chatDir {
         title = groupMsgNtfTitle(groupInfo, groupMember, hideContent: previewMode == .hidden)
     } else {
         title = previewMode == .hidden ? contactHidden : "\(cInfo.chatViewName):"

apps/ios/spec/api.md

@@ -81,19 +81,21 @@ The `ChatCommand` enum ([`AppAPITypes.swift` L15](../Shared/Model/AppAPITypes.sw
 | Command | Parameters | Description | Source |
 |---------|-----------|-------------|--------|
 | `apiGetChats` | `userId: Int64` | Get all chat previews for user | [L44](../Shared/Model/AppAPITypes.swift#L44) |
-| `apiGetChat` | `chatId, scope, contentTag, pagination, search` | Get messages for a chat | [L45](../Shared/Model/AppAPITypes.swift#L45) |
+| `apiGetChat` | `chatId, scope, contentTag, pagination, search, parentItemId` | Get messages for a chat. When `parentItemId` is non-nil, returns the comments thread under that channel post (mutually exclusive with `scope`). | [L45](../Shared/Model/AppAPITypes.swift#L45) |
 | `apiGetChatContentTypes` | `chatId, scope` | Get content type counts for a chat | [L46](../Shared/Model/AppAPITypes.swift#L46) |
 | `apiGetChatItemInfo` | `type, id, scope, itemId` | Get detailed info for a message | [L47](../Shared/Model/AppAPITypes.swift#L47) |
 | `apiSendMessages` | `type, id, scope, sendAsGroup, live, ttl, composedMessages` | Send one or more messages; `sendAsGroup` sends as channel owner | [L48](../Shared/Model/AppAPITypes.swift#L48) |
-| `apiCreateChatItems` | `noteFolderId, composedMessages` | Create items in notes folder | [L54](../Shared/Model/AppAPITypes.swift#L54) |
-| `apiUpdateChatItem` | `type, id, scope, itemId, updatedMessage, live` | Edit a sent message | [L56](../Shared/Model/AppAPITypes.swift#L56) |
-| `apiDeleteChatItem` | `type, id, scope, itemIds, mode` | Delete messages | [L57](../Shared/Model/AppAPITypes.swift#L57) |
-| `apiDeleteMemberChatItem` | `groupId, itemIds` | Moderate group messages | [L58](../Shared/Model/AppAPITypes.swift#L58) |
-| `apiChatItemReaction` | `type, id, scope, itemId, add, reaction` | Add/remove emoji reaction | [L61](../Shared/Model/AppAPITypes.swift#L61) |
-| `apiGetReactionMembers` | `userId, groupId, itemId, reaction` | Get who reacted | [L62](../Shared/Model/AppAPITypes.swift#L62) |
-| `apiPlanForwardChatItems` | `fromChatType, fromChatId, fromScope, itemIds` | Plan message forwarding | [L63](../Shared/Model/AppAPITypes.swift#L63) |
-| `apiForwardChatItems` | `toChatType, toChatId, toScope, sendAsGroup, from..., itemIds, ttl` | Forward messages; `sendAsGroup` forwards as channel owner | [L64](../Shared/Model/AppAPITypes.swift#L64) |
-| `apiReportMessage` | `groupId, chatItemId, reportReason, reportText` | Report group message | [L55](../Shared/Model/AppAPITypes.swift#L55) |
+| `apiSendComment` | `groupId, parentItemId, live, ttl, composedMessages` | Send one or more comments under a channel post. Maps to Haskell `/_comment #<groupId> <parentItemId>`; requires `useRelays' gInfo`. Outbound: only structural and content validation runs locally (quoted items must be in the same comment section). Authorization (role gate, `commentsDisabled` gate) is enforced at the receiver via the same XMsgNew/XMsgUpdate inbound gates that protect channel posts. | [L49](../Shared/Model/AppAPITypes.swift#L49) |
+| `apiSetCommentsDisabled` | `groupId, parentItemId, disabled` | Per-post comments override. Maps to Haskell `/_comments_disabled #<groupId> <parentItemId> on|off`; requires `useRelays' gInfo` and caller role at or above `GRModerator`. Returns `CRCmdOk` (the Swift wrapper is `async throws -> Void`). | [L50](../Shared/Model/AppAPITypes.swift#L50) |
+| `apiCreateChatItems` | `noteFolderId, composedMessages` | Create items in notes folder | [L56](../Shared/Model/AppAPITypes.swift#L56) |
+| `apiUpdateChatItem` | `type, id, scope, itemId, updatedMessage, live` | Edit a sent message | [L58](../Shared/Model/AppAPITypes.swift#L58) |
+| `apiDeleteChatItem` | `type, id, scope, itemIds, mode` | Delete messages | [L59](../Shared/Model/AppAPITypes.swift#L59) |
+| `apiDeleteMemberChatItem` | `groupId, itemIds` | Moderate group messages | [L60](../Shared/Model/AppAPITypes.swift#L60) |
+| `apiChatItemReaction` | `type, id, scope, itemId, add, reaction` | Add/remove emoji reaction (also valid on a comment item: reactions on comments are sent with `scope = nil` and reach all thread participants via the comment's `parent` chain) | [L63](../Shared/Model/AppAPITypes.swift#L63) |
+| `apiGetReactionMembers` | `userId, groupId, itemId, reaction` | Get who reacted | [L64](../Shared/Model/AppAPITypes.swift#L64) |
+| `apiPlanForwardChatItems` | `fromChatType, fromChatId, fromScope, itemIds` | Plan message forwarding | [L65](../Shared/Model/AppAPITypes.swift#L65) |
+| `apiForwardChatItems` | `toChatType, toChatId, toScope, sendAsGroup, from..., itemIds, ttl` | Forward messages; `sendAsGroup` forwards as channel owner | [L66](../Shared/Model/AppAPITypes.swift#L66) |
+| `apiReportMessage` | `groupId, chatItemId, reportReason, reportText` | Report group message | [L57](../Shared/Model/AppAPITypes.swift#L57) |
 | `apiChatRead` | `type, id, scope` | Mark entire chat as read | [L166](../Shared/Model/AppAPITypes.swift#L166) |
 | `apiChatItemsRead` | `type, id, scope, itemIds` | Mark specific items as read | [L167](../Shared/Model/AppAPITypes.swift#L167) |
 | `apiChatUnread` | `type, id, unreadChat` | Toggle unread badge | [L168](../Shared/Model/AppAPITypes.swift#L168) |
@@ -154,11 +156,11 @@ The `ChatCommand` enum ([`AppAPITypes.swift` L15](../Shared/Model/AppAPITypes.sw
 | Command | Parameters | Description | Source |
 |---------|-----------|-------------|--------|
 | `apiGetChatTags` | `userId` | Get all user tags | [L43](../Shared/Model/AppAPITypes.swift#L43) |
-| `apiCreateChatTag` | `tag: ChatTagData` | Create a new tag | [L49](../Shared/Model/AppAPITypes.swift#L49) |
-| `apiSetChatTags` | `type, id, tagIds` | Assign tags to a chat | [L50](../Shared/Model/AppAPITypes.swift#L50) |
-| `apiDeleteChatTag` | `tagId` | Delete a tag | [L51](../Shared/Model/AppAPITypes.swift#L51) |
-| `apiUpdateChatTag` | `tagId, tagData` | Update tag name/emoji | [L52](../Shared/Model/AppAPITypes.swift#L52) |
-| `apiReorderChatTags` | `tagIds` | Reorder tags | [L53](../Shared/Model/AppAPITypes.swift#L53) |
+| `apiCreateChatTag` | `tag: ChatTagData` | Create a new tag | [L51](../Shared/Model/AppAPITypes.swift#L51) |
+| `apiSetChatTags` | `type, id, tagIds` | Assign tags to a chat | [L52](../Shared/Model/AppAPITypes.swift#L52) |
+| `apiDeleteChatTag` | `tagId` | Delete a tag | [L53](../Shared/Model/AppAPITypes.swift#L53) |
+| `apiUpdateChatTag` | `tagId, tagData` | Update tag name/emoji | [L54](../Shared/Model/AppAPITypes.swift#L54) |
+| `apiReorderChatTags` | `tagIds` | Reorder tags | [L55](../Shared/Model/AppAPITypes.swift#L55) |
 
 ### 2.7 File Operations
 

apps/ios/spec/impact.md

@@ -46,14 +46,16 @@
 
 ## 1. Swift Source Impact
 
+[GAP] `product/views/comments.md` is not yet defined. Channel-comments slice 3 (data model + API surface) landed in `ChatTypes.swift`, `ChatModel.swift`, `AppAPITypes.swift`, `SimpleXAPI.swift` and ~16 view files (pattern-match cascade for the third `ChatInfo.group` associated value). The view-layer product concept will be created in slice 5 — see channel-comments plan §5.4. Until then, treat the channel-comments rows below as affecting PC31 (Channels) only.
+
 | Source File | Product Concepts Affected | Risk Level | Notes |
 |-------------|--------------------------|------------|-------|
 | Shared/ContentView.swift | PC1, PC2, PC3 | High | Root navigation — affects all chat access |
 | Shared/SimpleXApp.swift | PC1 through PC31 | High | App entry point — initialization affects everything |
 | Shared/AppDelegate.swift | PC18 | Medium | Push notification registration |
 | Shared/Views/ChatList/ChatListView.swift | PC1, PC28 | High | Main screen rendering and filtering |
-| Shared/Views/Chat/ChatView.swift | PC2, PC3, PC4, PC5, PC6, PC7, PC8, PC9, PC11, PC31 | High | Core conversation UI — most messaging features, channel message rendering |
-| Shared/Views/Chat/ComposeMessage/ComposeView.swift | PC4, PC6, PC9, PC11, PC31 | High | Message composition — send path for all messages, channel sendAsGroup |
+| Shared/Views/Chat/ChatView.swift | PC2, PC3, PC4, PC5, PC6, PC7, PC8, PC9, PC11, PC31 | High | Core conversation UI — most messaging features, channel message rendering. Slice 3: pattern-match cascade for `ChatInfo.group` third arg. [GAP] product/views/comments.md (slice 5). |
+| Shared/Views/Chat/ComposeMessage/ComposeView.swift | PC4, PC6, PC9, PC11, PC31 | High | Message composition — send path for all messages, channel sendAsGroup. Slice 3: pattern-match cascade for `ChatInfo.group` third arg (no compose logic changes yet — compose-as-comment lands in slice 4). [GAP] product/views/comments.md (slice 5). |
 | Shared/Views/Chat/ChatItem/ | PC2, PC3, PC5, PC7, PC8, PC9, PC10, PC11 | Medium | Individual message rendering components |
 | Shared/Views/Chat/ChatInfoView.swift | PC2, PC13, PC20 | Medium | Contact details and verification |
 | Shared/Views/Chat/Group/GroupChatInfoView.swift | PC3, PC14, PC15, PC16, PC30, PC31 | High | Group management hub, channel info adaptations |
@@ -75,13 +77,13 @@
 | Shared/Views/LocalAuth/ | PC22 | Medium | App lock functionality |
 | Shared/Views/Database/ | PC23, PC26 | High | Database encryption and export |
 | Shared/Views/Migration/ | PC26 | High | Device migration — data portability |
-| Shared/Model/ChatModel.swift | PC1 through PC31 | High | Central state — all features depend on it |
-| Shared/Model/SimpleXAPI.swift | PC1 through PC31 | High | FFI bridge — all commands flow through here |
-| Shared/Model/AppAPITypes.swift | PC1 through PC31 | High | Command/response types — all API communication |
+| Shared/Model/ChatModel.swift | PC1 through PC31 | High | Central state — all features depend on it. Slice 3: added `SecondaryItemsModelFilter.groupChannelMsgContext`, `ItemsModel.loadSecondaryChat` comments branch with `injectChannelMsgInfo`, `getCIItemsModel` comments-thread branch, four `cInfo.channelMsgInfo() == nil` gating sites. [GAP] product/views/comments.md (slice 5). |
+| Shared/Model/SimpleXAPI.swift | PC1 through PC31 | High | FFI bridge — all commands flow through here. Slice 3: added `apiSendComment`, `apiSetCommentsDisabled`, `apiGetChat(parentItemId:)` extension. [GAP] product/views/comments.md (slice 5). |
+| Shared/Model/AppAPITypes.swift | PC1 through PC31 | High | Command/response types — all API communication. Slice 3: added `apiSendComment` and `apiSetCommentsDisabled` enum cases, `parentItemId` parameter on `apiGetChat`. [GAP] product/views/comments.md (slice 5). |
 | Shared/Model/NtfManager.swift | PC18 | High | Notification delivery |
 | Shared/Model/BGManager.swift | PC18 | Medium | Background fetch scheduling |
 | Shared/Theme/ThemeManager.swift | PC24 | Medium | Theme resolution engine |
-| SimpleXChat/ChatTypes.swift | PC1 through PC31 | High | Core data types — all features use them |
+| SimpleXChat/ChatTypes.swift | PC1 through PC31 | High | Core data types — all features use them. Slice 3: extended `ChatInfo.group` to three associated values (added `ChannelMsgInfo?` carrier), added `ChannelMsgInfo` struct, added `ChatItem.parentChatItemId`/`commentsTotal`/`commentsDisabled` (hoisted from `meta` on decode), added `CIMeta.itemSharedMsgId`. [GAP] product/views/comments.md (slice 5). |
 | SimpleXChat/APITypes.swift | PC1 through PC31 | High | API result types and error handling |
 | SimpleXChat/CallTypes.swift | PC17 | Medium | Call-specific data types |
 | SimpleXChat/FileUtils.swift | PC10, PC23, PC26 | Medium | File paths and encryption utilities |

apps/ios/spec/state.md

@@ -1,6 +1,6 @@
 # SimpleX Chat iOS -- State Management
 
-**Source:** [`ChatModel.swift`](../Shared/Model/ChatModel.swift#L1-L1404) | [`ChatTypes.swift`](../SimpleXChat/ChatTypes.swift#L1-L5377)
+**Source:** [`ChatModel.swift`](../Shared/Model/ChatModel.swift#L1-L1483) | [`ChatTypes.swift`](../SimpleXChat/ChatTypes.swift#L1-L5377)
 
 > Technical specification for the app's state architecture: ChatModel, ItemsModel, Chat, ChatInfo, and preference storage.
 >
@@ -63,151 +63,152 @@ ChatTagsModel (singleton -- filter state)
 
 ---
 
-## 2. [ChatModel](../Shared/Model/ChatModel.swift#L353-L1289)
+## 2. [ChatModel](../Shared/Model/ChatModel.swift#L416-L1368)
 
 **Class**: `final class ChatModel: ObservableObject`
 **Singleton**: `ChatModel.shared`
-**Source**: [`Shared/Model/ChatModel.swift`](../Shared/Model/ChatModel.swift#L353)
+**Source**: [`Shared/Model/ChatModel.swift`](../Shared/Model/ChatModel.swift#L416)
 
 ### Key Published Properties
 
 #### App Lifecycle
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `onboardingStage` | `OnboardingStage?` | Current onboarding step | [L354](../Shared/Model/ChatModel.swift#L354) |
-| `chatInitialized` | `Bool` | Whether chat has been initialized | [L363](../Shared/Model/ChatModel.swift#L363) |
-| `chatRunning` | `Bool?` | Whether chat engine is running | [L364](../Shared/Model/ChatModel.swift#L364) |
-| `chatDbChanged` | `Bool` | Whether DB was changed externally | [L365](../Shared/Model/ChatModel.swift#L365) |
-| `chatDbEncrypted` | `Bool?` | Whether DB is encrypted | [L366](../Shared/Model/ChatModel.swift#L366) |
-| `chatDbStatus` | `DBMigrationResult?` | DB migration status | [L367](../Shared/Model/ChatModel.swift#L367) |
-| `ctrlInitInProgress` | `Bool` | Whether controller is initializing | [L368](../Shared/Model/ChatModel.swift#L368) |
-| `migrationState` | `MigrationToState?` | Device migration state | [L417](../Shared/Model/ChatModel.swift#L417) |
+| `onboardingStage` | `OnboardingStage?` | Current onboarding step | [L417](../Shared/Model/ChatModel.swift#L417) |
+| `chatInitialized` | `Bool` | Whether chat has been initialized | [L426](../Shared/Model/ChatModel.swift#L426) |
+| `chatRunning` | `Bool?` | Whether chat engine is running | [L427](../Shared/Model/ChatModel.swift#L427) |
+| `chatDbChanged` | `Bool` | Whether DB was changed externally | [L428](../Shared/Model/ChatModel.swift#L428) |
+| `chatDbEncrypted` | `Bool?` | Whether DB is encrypted | [L429](../Shared/Model/ChatModel.swift#L429) |
+| `chatDbStatus` | `DBMigrationResult?` | DB migration status | [L430](../Shared/Model/ChatModel.swift#L430) |
+| `ctrlInitInProgress` | `Bool` | Whether controller is initializing | [L431](../Shared/Model/ChatModel.swift#L431) |
+| `migrationState` | `MigrationToState?` | Device migration state | [L481](../Shared/Model/ChatModel.swift#L481) |
 
 #### User State
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `currentUser` | `User?` | Active user profile (triggers theme reapply on change) | [L357](../Shared/Model/ChatModel.swift#L357) |
-| `users` | `[UserInfo]` | All user profiles | [L362](../Shared/Model/ChatModel.swift#L362) |
-| `v3DBMigration` | `V3DBMigrationState` | Legacy DB migration state | [L356](../Shared/Model/ChatModel.swift#L356) |
+| `currentUser` | `User?` | Active user profile (triggers theme reapply on change) | [L420](../Shared/Model/ChatModel.swift#L420) |
+| `users` | `[UserInfo]` | All user profiles | [L425](../Shared/Model/ChatModel.swift#L425) |
+| `v3DBMigration` | `V3DBMigrationState` | Legacy DB migration state | [L419](../Shared/Model/ChatModel.swift#L419) |
 
 #### Chat List
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `chats` | `[Chat]` (private set) | All conversations for current user | [L374](../Shared/Model/ChatModel.swift#L374) |
-| `deletedChats` | `Set<String>` | Chat IDs pending deletion animation | [L375](../Shared/Model/ChatModel.swift#L375) |
+| `chats` | `[Chat]` (private set) | All conversations for current user | [L437](../Shared/Model/ChatModel.swift#L437) |
+| `deletedChats` | `Set<String>` | Chat IDs pending deletion animation | [L438](../Shared/Model/ChatModel.swift#L438) |
 
 #### Active Chat
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `chatId` | `String?` | Currently open chat ID | [L377](../Shared/Model/ChatModel.swift#L377) |
-| `chatAgentConnId` | `String?` | Agent connection ID for active chat | [L378](../Shared/Model/ChatModel.swift#L378) |
-| `chatSubStatus` | `SubscriptionStatus?` | Active chat subscription status | [L379](../Shared/Model/ChatModel.swift#L379) |
-| `openAroundItemId` | `ChatItem.ID?` | Item to scroll to when opening | [L380](../Shared/Model/ChatModel.swift#L380) |
-| `chatToTop` | `String?` | Chat to scroll to top | [L381](../Shared/Model/ChatModel.swift#L381) |
-| `groupMembers` | `[GMember]` | Members of active group | [L382](../Shared/Model/ChatModel.swift#L382) |
-| `groupMembersIndexes` | `[Int64: Int]` | Member ID to index mapping | [L383](../Shared/Model/ChatModel.swift#L383) |
-| `membersLoaded` | `Bool` | Whether members have been loaded | [L384](../Shared/Model/ChatModel.swift#L384) |
-| `secondaryIM` | `ItemsModel?` | Secondary items model (e.g. support chat scope) | [L435](../Shared/Model/ChatModel.swift#L435) |
+| `chatId` | `String?` | Currently open chat ID | [L440](../Shared/Model/ChatModel.swift#L440) |
+| `chatAgentConnId` | `String?` | Agent connection ID for active chat | [L441](../Shared/Model/ChatModel.swift#L441) |
+| `chatSubStatus` | `SubscriptionStatus?` | Active chat subscription status | [L442](../Shared/Model/ChatModel.swift#L442) |
+| `openAroundItemId` | `ChatItem.ID?` | Item to scroll to when opening | [L443](../Shared/Model/ChatModel.swift#L443) |
+| `chatToTop` | `String?` | Chat to scroll to top | [L444](../Shared/Model/ChatModel.swift#L444) |
+| `groupMembers` | `[GMember]` | Members of active group | [L446](../Shared/Model/ChatModel.swift#L446) |
+| `groupMembersIndexes` | `[Int64: Int]` | Member ID to index mapping | [L447](../Shared/Model/ChatModel.swift#L447) |
+| `membersLoaded` | `Bool` | Whether members have been loaded | [L448](../Shared/Model/ChatModel.swift#L448) |
+| `secondaryIM` | `ItemsModel?` | Secondary items model (member support scope, channel comments thread, or content-type filter) | [L499](../Shared/Model/ChatModel.swift#L499) |
 
 #### Authentication
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `contentViewAccessAuthenticated` | `Bool` | Whether user has passed authentication | [L371](../Shared/Model/ChatModel.swift#L371) |
-| `laRequest` | `LocalAuthRequest?` | Pending authentication request | [L372](../Shared/Model/ChatModel.swift#L372) |
+| `contentViewAccessAuthenticated` | `Bool` | Whether user has passed authentication | [L434](../Shared/Model/ChatModel.swift#L434) |
+| `laRequest` | `LocalAuthRequest?` | Pending authentication request | [L435](../Shared/Model/ChatModel.swift#L435) |
 
 #### Notifications
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `deviceToken` | `DeviceToken?` | Current APNs device token | [L395](../Shared/Model/ChatModel.swift#L395) |
-| `savedToken` | `DeviceToken?` | Previously saved token | [L396](../Shared/Model/ChatModel.swift#L396) |
-| `tokenRegistered` | `Bool` | Whether token is registered with server | [L397](../Shared/Model/ChatModel.swift#L397) |
-| `tokenStatus` | `NtfTknStatus?` | Token registration status | [L399](../Shared/Model/ChatModel.swift#L399) |
-| `notificationMode` | `NotificationsMode` | Current notification mode (.off/.periodic/.instant) | [L400](../Shared/Model/ChatModel.swift#L400) |
-| `notificationServer` | `String?` | Notification server URL | [L401](../Shared/Model/ChatModel.swift#L401) |
-| `notificationPreview` | `NotificationPreviewMode` | What to show in notifications | [L402](../Shared/Model/ChatModel.swift#L402) |
-| `notificationResponse` | `UNNotificationResponse?` | Pending notification action | [L369](../Shared/Model/ChatModel.swift#L369) |
-| `ntfContactRequest` | `NTFContactRequest?` | Pending contact request from notification | [L404](../Shared/Model/ChatModel.swift#L404) |
-| `ntfCallInvitationAction` | `(ChatId, NtfCallAction)?` | Pending call action from notification | [L405](../Shared/Model/ChatModel.swift#L405) |
+| `deviceToken` | `DeviceToken?` | Current APNs device token | [L459](../Shared/Model/ChatModel.swift#L459) |
+| `savedToken` | `DeviceToken?` | Previously saved token | [L460](../Shared/Model/ChatModel.swift#L460) |
+| `tokenRegistered` | `Bool` | Whether token is registered with server | [L461](../Shared/Model/ChatModel.swift#L461) |
+| `tokenStatus` | `NtfTknStatus?` | Token registration status | [L463](../Shared/Model/ChatModel.swift#L463) |
+| `notificationMode` | `NotificationsMode` | Current notification mode (.off/.periodic/.instant) | [L464](../Shared/Model/ChatModel.swift#L464) |
+| `notificationServer` | `String?` | Notification server URL | [L465](../Shared/Model/ChatModel.swift#L465) |
+| `notificationPreview` | `NotificationPreviewMode` | What to show in notifications | [L466](../Shared/Model/ChatModel.swift#L466) |
+| `notificationResponse` | `UNNotificationResponse?` | Pending notification action | [L432](../Shared/Model/ChatModel.swift#L432) |
+| `ntfContactRequest` | `NTFContactRequest?` | Pending contact request from notification | [L468](../Shared/Model/ChatModel.swift#L468) |
+| `ntfCallInvitationAction` | `(ChatId, NtfCallAction)?` | Pending call action from notification | [L469](../Shared/Model/ChatModel.swift#L469) |
 
 #### Calls
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `callInvitations` | `[ChatId: RcvCallInvitation]` | Pending incoming call invitations | [L407](../Shared/Model/ChatModel.swift#L407) |
-| `activeCall` | `Call?` | Currently active call | [L408](../Shared/Model/ChatModel.swift#L408) |
-| `callCommand` | `WebRTCCommandProcessor` | WebRTC command queue | [L409](../Shared/Model/ChatModel.swift#L409) |
-| `showCallView` | `Bool` | Whether to show full-screen call UI | [L410](../Shared/Model/ChatModel.swift#L410) |
-| `activeCallViewIsCollapsed` | `Bool` | Whether call view is in PiP mode | [L411](../Shared/Model/ChatModel.swift#L411) |
+| `callInvitations` | `[ChatId: RcvCallInvitation]` | Pending incoming call invitations | [L471](../Shared/Model/ChatModel.swift#L471) |
+| `activeCall` | `Call?` | Currently active call | [L472](../Shared/Model/ChatModel.swift#L472) |
+| `callCommand` | `WebRTCCommandProcessor` | WebRTC command queue | [L473](../Shared/Model/ChatModel.swift#L473) |
+| `showCallView` | `Bool` | Whether to show full-screen call UI | [L474](../Shared/Model/ChatModel.swift#L474) |
+| `activeCallViewIsCollapsed` | `Bool` | Whether call view is in PiP mode | [L475](../Shared/Model/ChatModel.swift#L475) |
 
 #### Remote Desktop
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `remoteCtrlSession` | `RemoteCtrlSession?` | Active remote desktop session | [L414](../Shared/Model/ChatModel.swift#L414) |
+| `remoteCtrlSession` | `RemoteCtrlSession?` | Active remote desktop session | [L478](../Shared/Model/ChatModel.swift#L478) |
 
 #### Misc
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `userAddress` | `UserContactLink?` | User's SimpleX address | [L391](../Shared/Model/ChatModel.swift#L391) |
-| `chatItemTTL` | `ChatItemTTL` | Global message TTL | [L392](../Shared/Model/ChatModel.swift#L392) |
-| `appOpenUrl` | `URL?` | URL opened while app active | [L393](../Shared/Model/ChatModel.swift#L393) |
-| `appOpenUrlLater` | `URL?` | URL opened while app inactive | [L394](../Shared/Model/ChatModel.swift#L394) |
-| `showingInvitation` | `ShowingInvitation?` | Currently displayed invitation | [L416](../Shared/Model/ChatModel.swift#L416) |
-| `draft` | `ComposeState?` | Saved compose draft | [L420](../Shared/Model/ChatModel.swift#L420) |
-| `draftChatId` | `String?` | Chat ID for saved draft | [L421](../Shared/Model/ChatModel.swift#L421) |
-| `networkInfo` | `UserNetworkInfo` | Current network type and status | [L422](../Shared/Model/ChatModel.swift#L422) |
-| `conditions` | `ServerOperatorConditions` | Server usage conditions | [L424](../Shared/Model/ChatModel.swift#L424) |
-| `stopPreviousRecPlay` | `URL?` | Currently playing audio source | [L419](../Shared/Model/ChatModel.swift#L419) |
+| `userAddress` | `UserContactLink?` | User's SimpleX address | [L455](../Shared/Model/ChatModel.swift#L455) |
+| `chatItemTTL` | `ChatItemTTL` | Global message TTL | [L456](../Shared/Model/ChatModel.swift#L456) |
+| `appOpenUrl` | `URL?` | URL opened while app active | [L457](../Shared/Model/ChatModel.swift#L457) |
+| `appOpenUrlLater` | `URL?` | URL opened while app inactive | [L458](../Shared/Model/ChatModel.swift#L458) |
+| `showingInvitation` | `ShowingInvitation?` | Currently displayed invitation | [L480](../Shared/Model/ChatModel.swift#L480) |
+| `draft` | `ComposeState?` | Saved compose draft | [L484](../Shared/Model/ChatModel.swift#L484) |
+| `draftChatId` | `String?` | Chat ID for saved draft | [L485](../Shared/Model/ChatModel.swift#L485) |
+| `networkInfo` | `UserNetworkInfo` | Current network type and status | [L486](../Shared/Model/ChatModel.swift#L486) |
+| `conditions` | `ServerOperatorConditions` | Server usage conditions | [L488](../Shared/Model/ChatModel.swift#L488) |
+| `stopPreviousRecPlay` | `URL?` | Currently playing audio source | [L483](../Shared/Model/ChatModel.swift#L483) |
 
 ### Non-Published Properties
 
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `messageDelivery` | `[Int64: () -> Void]` | Pending delivery confirmation callbacks | [L426](../Shared/Model/ChatModel.swift#L426) |
-| `filesToDelete` | `Set<URL>` | Files queued for deletion | [L428](../Shared/Model/ChatModel.swift#L428) |
-| `im` | `ItemsModel` | Reference to `ItemsModel.shared` | [L432](../Shared/Model/ChatModel.swift#L432) |
+| `messageDelivery` | `[Int64: () -> Void]` | Pending delivery confirmation callbacks | [L490](../Shared/Model/ChatModel.swift#L490) |
+| `filesToDelete` | `Set<URL>` | Files queued for deletion | [L492](../Shared/Model/ChatModel.swift#L492) |
+| `im` | `ItemsModel` | Reference to `ItemsModel.shared` | [L496](../Shared/Model/ChatModel.swift#L496) |
 
 ### Key Methods
 
 | Method | Description | Line |
 |--------|-------------|------|
-| `getUser(_ userId:)` | Find user by ID | [L455](../Shared/Model/ChatModel.swift#L455) |
-| `updateUser(_ user:)` | Update user in list and current | [L466](../Shared/Model/ChatModel.swift#L466) |
-| `removeUser(_ user:)` | Remove user from list | [L476](../Shared/Model/ChatModel.swift#L476) |
-| `getChat(_ id:)` | Find chat by ID | [L487](../Shared/Model/ChatModel.swift#L487) |
-| `addChat(_ chat:)` | Add chat to list | [L542](../Shared/Model/ChatModel.swift#L542) |
-| `updateChatInfo(_ cInfo:)` | Update chat metadata | [L556](../Shared/Model/ChatModel.swift#L556) |
-| `replaceChat(_ id:, _ chat:)` | Replace chat in list | [L608](../Shared/Model/ChatModel.swift#L608) |
-| `removeChat(_ id:)` | Remove chat from list | [L1217](../Shared/Model/ChatModel.swift#L1217) |
-| `popChat(_ id:)` | Move chat to top of list | [L1193](../Shared/Model/ChatModel.swift#L1193) |
-| `totalUnreadCountForAllUsers()` | Sum unread across all users | [L1093](../Shared/Model/ChatModel.swift#L1093) |
+| `getUser(_ userId:)` | Find user by ID | [L519](../Shared/Model/ChatModel.swift#L519) |
+| `updateUser(_ user:)` | Update user in list and current | [L530](../Shared/Model/ChatModel.swift#L530) |
+| `removeUser(_ user:)` | Remove user from list | [L540](../Shared/Model/ChatModel.swift#L540) |
+| `getChat(_ id:)` | Find chat by ID | [L551](../Shared/Model/ChatModel.swift#L551) |
+| `addChat(_ chat:)` | Add chat to list | [L606](../Shared/Model/ChatModel.swift#L606) |
+| `updateChatInfo(_ cInfo:)` | Update chat metadata | [L620](../Shared/Model/ChatModel.swift#L620) |
+| `replaceChat(_ id:, _ chat:)` | Replace chat in list | [L672](../Shared/Model/ChatModel.swift#L672) |
+| `getCIItemsModel(_ cInfo:_ ci:)` | Resolve which `ItemsModel` an incoming item belongs to (primary `im`, secondary `secondaryIM`, or `nil`). For the channel-comments thread it routes via `ci.parentChatItemId == parent.id`. | [L747](../Shared/Model/ChatModel.swift#L747) |
+| `removeChat(_ id:)` | Remove chat from list | [L1290](../Shared/Model/ChatModel.swift#L1290) |
+| `popChat(_ id:)` | Move chat to top of list | [L1266](../Shared/Model/ChatModel.swift#L1266) |
+| `totalUnreadCountForAllUsers()` | Sum unread across all users | [L1166](../Shared/Model/ChatModel.swift#L1166) |
 
 ---
 
-## 3. [ItemsModel](../Shared/Model/ChatModel.swift#L74-L174)
+## 3. [ItemsModel](../Shared/Model/ChatModel.swift#L80-L227)
 
 **Class**: `class ItemsModel: ObservableObject`
 **Primary singleton**: `ItemsModel.shared`
-**Secondary instances**: Created via `ItemsModel.loadSecondaryChat()` for scope-based views (e.g., group member support chat)
-**Source**: [`Shared/Model/ChatModel.swift`](../Shared/Model/ChatModel.swift#L74)
+**Secondary instances**: Created via `ItemsModel.loadSecondaryChat()` for scope-based views (member support chat, channel comments thread, reports filter).
+**Source**: [`Shared/Model/ChatModel.swift`](../Shared/Model/ChatModel.swift#L80)
 
 ### Properties
 
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `reversedChatItems` | `[ChatItem]` | Messages in reverse chronological order (newest first) | [L80](../Shared/Model/ChatModel.swift#L80) |
-| `itemAdded` | `Bool` | Flag indicating a new item was added | [L83](../Shared/Model/ChatModel.swift#L83) |
-| `chatState` | `ActiveChatState` | Pagination splits and loaded ranges | [L87](../Shared/Model/ChatModel.swift#L87) |
-| `isLoading` | `Bool` | Whether messages are currently loading | [L91](../Shared/Model/ChatModel.swift#L91) |
-| `showLoadingProgress` | `ChatId?` | Chat ID showing loading spinner | [L92](../Shared/Model/ChatModel.swift#L92) |
-| `preloadState` | `PreloadState` | State for infinite-scroll preloading | [L77](../Shared/Model/ChatModel.swift#L77) |
-| `secondaryIMFilter` | `SecondaryItemsModelFilter?` | Filter for secondary instances | [L76](../Shared/Model/ChatModel.swift#L76) |
+| `reversedChatItems` | `[ChatItem]` | Messages in reverse chronological order (newest first) | [L86](../Shared/Model/ChatModel.swift#L86) |
+| `itemAdded` | `Bool` | Flag indicating a new item was added | [L89](../Shared/Model/ChatModel.swift#L89) |
+| `chatState` | `ActiveChatState` | Pagination splits and loaded ranges | [L93](../Shared/Model/ChatModel.swift#L93) |
+| `isLoading` | `Bool` | Whether messages are currently loading | [L97](../Shared/Model/ChatModel.swift#L97) |
+| `showLoadingProgress` | `ChatId?` | Chat ID showing loading spinner | [L98](../Shared/Model/ChatModel.swift#L98) |
+| `preloadState` | `PreloadState` | State for infinite-scroll preloading | [L83](../Shared/Model/ChatModel.swift#L83) |
+| `secondaryIMFilter` | `SecondaryItemsModelFilter?` | Filter for secondary instances | [L82](../Shared/Model/ChatModel.swift#L82) |
 
 ### Computed Properties
 
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `lastItemsLoaded` | `Bool` | Whether the oldest messages have been loaded | [L97](../Shared/Model/ChatModel.swift#L97) |
-| `contentTag` | `MsgContentTag?` | Content type filter (if secondary) | [L159](../Shared/Model/ChatModel.swift#L159) |
-| `groupScopeInfo` | `GroupChatScopeInfo?` | Group scope filter (if secondary) | [L167](../Shared/Model/ChatModel.swift#L167) |
+| `lastItemsLoaded` | `Bool` | Whether the oldest messages have been loaded | [L103](../Shared/Model/ChatModel.swift#L103) |
+| `contentTag` | `MsgContentTag?` | Content type filter (if secondary) | [L212](../Shared/Model/ChatModel.swift#L212) |
+| `groupScopeInfo` | `GroupChatScopeInfo?` | Group scope filter (if secondary) | [L220](../Shared/Model/ChatModel.swift#L220) |
 
 ### Throttling
 
@@ -226,37 +227,52 @@ Direct `@Published` properties (`isLoading`, `showLoadingProgress`) bypass throt
 
 | Method | Description | Line |
 |--------|-------------|------|
-| `loadOpenChat(_ chatId:)` | Load chat with 250ms navigation delay | [L117](../Shared/Model/ChatModel.swift#L117) |
-| `loadOpenChatNoWait(_ chatId:, _ openAroundItemId:)` | Load chat without delay | [L143](../Shared/Model/ChatModel.swift#L143) |
-| `loadSecondaryChat(_ chatId:, chatFilter:)` | Create secondary ItemsModel instance | [L110](../Shared/Model/ChatModel.swift#L110) |
+| `loadOpenChat(_ chatId:)` | Load chat with 250ms navigation delay | [L170](../Shared/Model/ChatModel.swift#L170) |
+| `loadOpenChatNoWait(_ chatId:, _ openAroundItemId:)` | Load chat without delay | [L196](../Shared/Model/ChatModel.swift#L196) |
+| `loadSecondaryChat(_ chatId:, chatFilter:)` | Create secondary `ItemsModel` instance. For `.groupChannelMsgContext` it fetches via `apiGetChat(parentItemId:)` and injects a local-only `ChannelMsgInfo` into the returned `ChatInfo.group`. | [L116](../Shared/Model/ChatModel.swift#L116) |
 
-### [SecondaryItemsModelFilter](../Shared/Model/ChatModel.swift#L58-L70)
+### [SecondaryItemsModelFilter](../Shared/Model/ChatModel.swift#L58-L76)
 
-Used for secondary chat views (e.g., group member support scope, content type filter):
+Used for secondary chat views (e.g., group member support scope, content type filter, channel comments thread):
 
 ```swift
 enum SecondaryItemsModelFilter {
     case groupChatScopeContext(groupScopeInfo: GroupChatScopeInfo)
     case msgContentTagContext(contentTag: MsgContentTag)
+    case groupChannelMsgContext(parent: ChatItem)
 }
 ```
 
+`.groupChannelMsgContext` is the channel-comments-thread scope. The associated `parent` carries the channel post being commented on; the comments-thread view routes inbound items via `ci.parentChatItemId == parent.id`. The parent's `meta.itemSharedMsgId` is required before opening the thread (the owner-side parent may briefly lack a shared id during send).
+
+### Channel comments thread
+
+Opening a comments thread bypasses the standard `loadOpenChat` flow because the comments scope is not represented on the wire as a `GroupChatScope`. Instead:
+
+1. The caller invokes [`ItemsModel.loadSecondaryChat`](../Shared/Model/ChatModel.swift#L116-L153) with `chatFilter: .groupChannelMsgContext(parent:)`.
+2. Items are fetched via `apiGetChat(..., parentItemId: parent.id)` (see `apiGetChat` in [spec/api.md §2.3](api.md#23-chat--message-operations)).
+3. The returned `ChatInfo.group` has its third associated value rewritten by [`injectChannelMsgInfo`](../Shared/Model/ChatModel.swift#L158-L167) to embed a local-only [`ChannelMsgInfo`](../SimpleXChat/ChatTypes.swift#L2028-L2036) carrier so toolbar and routing logic can read the parent without a second lookup.
+4. [`getCIItemsModel`](../Shared/Model/ChatModel.swift#L747-L777) gains a new branch (`cInfo.channelMsgInfo() != nil`) that routes events into the secondary `ItemsModel` when `ci.parentChatItemId == parent.id`.
+5. Gating sites that previously checked `cInfo.groupChatScope() == nil` to decide whether to update the main chat preview now also check `cInfo.channelMsgInfo() == nil`, so comment items do not bubble into the main chat list.
+
+The carrier is **not** serialized: `ChannelMsgInfo` is `Decodable` only so it nests cleanly into `ChatInfo.group`, but the server never sends this field — it is injected exclusively by `loadSecondaryChat`. Inbound `XMsgNew` items with a `parent` come back over the regular event stream; they are routed by `ci.parentChatItemId` alone.
+
 ---
 
-## 4. [ChatTagsModel](../Shared/Model/ChatModel.swift#L189-L291)
+## 4. [ChatTagsModel](../Shared/Model/ChatModel.swift#L242-L344)
 
 **Class**: `class ChatTagsModel: ObservableObject`
 **Singleton**: `ChatTagsModel.shared`
-**Source**: [`Shared/Model/ChatModel.swift`](../Shared/Model/ChatModel.swift#L189)
+**Source**: [`Shared/Model/ChatModel.swift`](../Shared/Model/ChatModel.swift#L242)
 
 ### Properties
 
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `userTags` | `[ChatTag]` | User-defined tags | [L192](../Shared/Model/ChatModel.swift#L192) |
-| `activeFilter` | `ActiveFilter?` | Currently active filter tab | [L193](../Shared/Model/ChatModel.swift#L193) |
-| `presetTags` | `[PresetTag: Int]` | Preset tag counts (groups, contacts, favorites, etc.) | [L194](../Shared/Model/ChatModel.swift#L194) |
-| `unreadTags` | `[Int64: Int]` | Unread count per user tag | [L195](../Shared/Model/ChatModel.swift#L195) |
+| `userTags` | `[ChatTag]` | User-defined tags | [L245](../Shared/Model/ChatModel.swift#L245) |
+| `activeFilter` | `ActiveFilter?` | Currently active filter tab | [L246](../Shared/Model/ChatModel.swift#L246) |
+| `presetTags` | `[PresetTag: Int]` | Preset tag counts (groups, contacts, favorites, etc.) | [L247](../Shared/Model/ChatModel.swift#L247) |
+| `unreadTags` | `[Int64: Int]` | Unread count per user tag | [L248](../Shared/Model/ChatModel.swift#L248) |
 
 ### [ActiveFilter](../Shared/Views/ChatList/ChatListView.swift#L52)
 
@@ -270,11 +286,11 @@ enum ActiveFilter {
 
 ---
 
-## 5. [ChannelRelaysModel](../Shared/Model/ChatModel.swift#L336-L350)
+## 5. [ChannelRelaysModel](../Shared/Model/ChatModel.swift#L389-L413)
 
 **Class**: `class ChannelRelaysModel: ObservableObject`
 **Singleton**: `ChannelRelaysModel.shared`
-**Source**: [`Shared/Model/ChatModel.swift`](../Shared/Model/ChatModel.swift#L336)
+**Source**: [`Shared/Model/ChatModel.swift`](../Shared/Model/ChatModel.swift#L389)
 
 Holds runtime relay state for the currently viewed channel. Used by `ChannelRelaysView` to display and manage relays. Reset when the view is dismissed.
 
@@ -282,22 +298,22 @@ Holds runtime relay state for the currently viewed channel. Used by `ChannelRela
 
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `groupId` | `Int64?` | Group ID of the channel whose relays are loaded | [L338](../Shared/Model/ChatModel.swift#L338) |
-| `groupRelays` | `[GroupRelay]` | Current relay instances for the channel | [L339](../Shared/Model/ChatModel.swift#L339) |
+| `groupId` | `Int64?` | Group ID of the channel whose relays are loaded | [L391](../Shared/Model/ChatModel.swift#L391) |
+| `groupRelays` | `[GroupRelay]` | Current relay instances for the channel | [L392](../Shared/Model/ChatModel.swift#L392) |
 
 ### Methods
 
 | Method | Description | Line |
 |--------|-------------|------|
-| `set(groupId:groupRelays:)` | Populate all properties at once | [L341](../Shared/Model/ChatModel.swift#L341) |
-| `reset()` | Clear all properties to nil/empty | [L346](../Shared/Model/ChatModel.swift#L346) |
+| `set(groupId:groupRelays:)` | Populate all properties at once | [L394](../Shared/Model/ChatModel.swift#L394) |
+| `reset()` | Clear all properties to nil/empty | [L409](../Shared/Model/ChatModel.swift#L409) |
 
 ---
 
-## 6. [Chat](../Shared/Model/ChatModel.swift#L1301-L1353)
+## 6. [Chat](../Shared/Model/ChatModel.swift#L1380-L1432)
 
 **Class**: `final class Chat: ObservableObject, Identifiable, ChatLike`
-**Source**: [`Shared/Model/ChatModel.swift`](../Shared/Model/ChatModel.swift#L1301)
+**Source**: [`Shared/Model/ChatModel.swift`](../Shared/Model/ChatModel.swift#L1380)
 
 Represents a single conversation in the chat list. Each `Chat` is an independent observable object.
 
@@ -305,12 +321,12 @@ Represents a single conversation in the chat list. Each `Chat` is an independent
 
 | Property | Type | Description | Line |
 |----------|------|-------------|------|
-| `chatInfo` | `ChatInfo` | Conversation type and metadata | [L1302](../Shared/Model/ChatModel.swift#L1302) |
-| `chatItems` | `[ChatItem]` | Preview items (typically last message) | [L1303](../Shared/Model/ChatModel.swift#L1303) |
-| `chatStats` | `ChatStats` | Unread counts and min unread item ID | [L1304](../Shared/Model/ChatModel.swift#L1304) |
-| `created` | `Date` | Creation timestamp | [L1305](../Shared/Model/ChatModel.swift#L1305) |
+| `chatInfo` | `ChatInfo` | Conversation type and metadata | [L1381](../Shared/Model/ChatModel.swift#L1381) |
+| `chatItems` | `[ChatItem]` | Preview items (typically last message) | [L1382](../Shared/Model/ChatModel.swift#L1382) |
+| `chatStats` | `ChatStats` | Unread counts and min unread item ID | [L1383](../Shared/Model/ChatModel.swift#L1383) |
+| `created` | `Date` | Creation timestamp | [L1384](../Shared/Model/ChatModel.swift#L1384) |
 
-### [ChatStats](../SimpleXChat/ChatTypes.swift#L1881-L1903)
+### [ChatStats](../SimpleXChat/ChatTypes.swift#L1966-L1988)
 
 ```swift
 struct ChatStats: Decodable, Hashable {
@@ -326,24 +342,24 @@ struct ChatStats: Decodable, Hashable {
 
 | Property | Description | Line |
 |----------|-------------|------|
-| `id` | Chat ID from `chatInfo.id` | [L1336](../Shared/Model/ChatModel.swift#L1336) |
-| `viewId` | Unique view identity including creation time | [L1338](../Shared/Model/ChatModel.swift#L1338) |
-| `unreadTag` | Whether chat counts as "unread" based on notification settings | [L1328](../Shared/Model/ChatModel.swift#L1328) |
-| `supportUnreadCount` | Unread count for group support scope | [L1340](../Shared/Model/ChatModel.swift#L1340) |
+| `id` | Chat ID from `chatInfo.id` | [L1415](../Shared/Model/ChatModel.swift#L1415) |
+| `viewId` | Unique view identity including creation time | [L1417](../Shared/Model/ChatModel.swift#L1417) |
+| `unreadTag` | Whether chat counts as "unread" based on notification settings | [L1407](../Shared/Model/ChatModel.swift#L1407) |
+| `supportUnreadCount` | Unread count for group support scope | [L1419](../Shared/Model/ChatModel.swift#L1419) |
 
 ---
 
-## 7. [ChatInfo](../SimpleXChat/ChatTypes.swift#L1374-L1856)
+## 7. [ChatInfo](../SimpleXChat/ChatTypes.swift#L1435-L1941)
 
 **Enum**: `public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable`
-**Source**: [`SimpleXChat/ChatTypes.swift`](../SimpleXChat/ChatTypes.swift#L1374)
+**Source**: [`SimpleXChat/ChatTypes.swift`](../SimpleXChat/ChatTypes.swift#L1435)
 
 Represents the type and metadata of a conversation:
 
 ```swift
 public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
     case direct(contact: Contact)
-    case group(groupInfo: GroupInfo, groupChatScope: GroupChatScopeInfo?)
+    case group(groupInfo: GroupInfo, groupChatScope: GroupChatScopeInfo?, channelMsgInfo: ChannelMsgInfo?)
     case local(noteFolder: NoteFolder)
     case contactRequest(contactRequest: UserContactRequest)
     case contactConnection(contactConnection: PendingContactConnection)
@@ -356,12 +372,23 @@ public enum ChatInfo: Identifiable, Decodable, NamedChat, Hashable {
 | Case | Associated Value | Description |
 |------|-----------------|-------------|
 | `.direct` | `Contact` | One-to-one conversation |
-| `.group` | `GroupInfo, GroupChatScopeInfo?` | Group conversation (optional scope for member support threads) |
+| `.group` | `GroupInfo, GroupChatScopeInfo?, ChannelMsgInfo?` | Group conversation. Optional `GroupChatScopeInfo` selects a member support thread; optional `ChannelMsgInfo` (set client-side only) selects a channel-comments thread under a specific post. The two are mutually exclusive in practice. |
 | `.local` | `NoteFolder` | Local notes (self-chat) |
 | `.contactRequest` | `UserContactRequest` | Incoming contact request |
 | `.contactConnection` | `PendingContactConnection` | Pending connection |
 | `.invalidJSON` | `Data?` | Undecodable chat data |
 
+### [ChannelMsgInfo](../SimpleXChat/ChatTypes.swift#L2028-L2036)
+
+```swift
+public struct ChannelMsgInfo: Decodable, Hashable {
+    public var channelMsgItem: ChatItem
+    public var channelMsgSharedId: String
+}
+```
+
+Local-only carrier for the comments-thread view. Holds the parent channel post (`channelMsgItem`) and its shared message id (`channelMsgSharedId`, hoisted from `parent.meta.itemSharedMsgId`). The struct is `Decodable` so it can sit inside the `ChatInfo.group` enum case, but the Haskell core never emits this field — `ItemsModel.loadSecondaryChat` injects it after fetching the thread by `parentItemId=`. See [§3 Channel comments thread](#channel-comments-thread).
+
 ### Key Computed Properties on ChatInfo
 
 | Property | Type | Description |
@@ -382,25 +409,46 @@ A **channel** is a group with `groupInfo.useRelays == true`. These types support
 | Type | Field | Type | Description | Line |
 |------|-------|------|-------------|------|
 | `User` | `userChatRelay` | `Bool` | Whether user acts as a chat relay | [L46](../SimpleXChat/ChatTypes.swift#L46) |
-| `GroupInfo` | `useRelays` | `Bool` | Whether group uses relay infrastructure (channel mode) | [L2343](../SimpleXChat/ChatTypes.swift#L2343) |
-| `GroupInfo` | `relayOwnStatus` | `RelayStatus?` | Current user's relay status in this group | [L2344](../SimpleXChat/ChatTypes.swift#L2344) |
-| `GroupProfile` | `publicGroup` | `PublicGroupProfile?` | Channel-specific profile data (type, link, ID) | [L2472](../SimpleXChat/ChatTypes.swift#L2472) |
+| `GroupInfo` | `useRelays` | `Bool` | Whether group uses relay infrastructure (channel mode) | [L2448](../SimpleXChat/ChatTypes.swift#L2448) |
+| `GroupInfo` | `relayOwnStatus` | `RelayStatus?` | Current user's relay status in this group | [L2449](../SimpleXChat/ChatTypes.swift#L2449) |
+| `GroupProfile` | `publicGroup` | `PublicGroupProfile?` | Channel-specific profile data (type, link, ID) | [L2588](../SimpleXChat/ChatTypes.swift#L2588) |
 
 #### New Types
 
 | Type | Kind | Description | Line |
 |------|------|-------------|------|
-| `RelayStatus` | `enum` | Relay lifecycle: `.rsNew`, `.rsInvited`, `.rsAccepted`, `.rsActive` | [L2506](../SimpleXChat/ChatTypes.swift#L2506) |
-| `RelayStatus.text` | `extension` | Localized display text: New/Invited/Accepted/Active | [L2565](../SimpleXChat/ChatTypes.swift#L2565) |
-| `GroupRelay` | `struct` | Relay instance for a group (ID, member ID, relay status). Fetched at runtime via `apiGetGroupRelays` (owner only) | [L2555](../SimpleXChat/ChatTypes.swift#L2555) |
-| `UserChatRelay` | `struct` | User's chat relay configuration (ID, SMP address, name, domains, preset/tested/enabled/deleted flags) | [L2513](../SimpleXChat/ChatTypes.swift#L2513) |
+| `RelayStatus` | `enum` | Relay lifecycle: `.rsNew`, `.rsInvited`, `.rsAccepted`, `.rsActive` | [L2659](../SimpleXChat/ChatTypes.swift#L2659) |
+| `RelayStatus.text` | `extension` | Localized display text: New/Invited/Accepted/Active | [L2730](../SimpleXChat/ChatTypes.swift#L2730) |
+| `GroupRelay` | `struct` | Relay instance for a group (ID, member ID, relay status). Fetched at runtime via `apiGetGroupRelays` (owner only) | [L2721](../SimpleXChat/ChatTypes.swift#L2721) |
+| `UserChatRelay` | `struct` | User's chat relay configuration (ID, SMP address, name, domains, preset/tested/enabled/deleted flags) | [L2674](../SimpleXChat/ChatTypes.swift#L2674) |
 
 #### New Enum Cases
 
 | Enum | Case | Description | Line |
 |------|------|-------------|------|
-| `GroupMemberRole` | `.relay` | Role for relay members (below `.observer`) | [L2807](../SimpleXChat/ChatTypes.swift#L2807) |
-| `CIDirection` | `.channelRcv` | Message direction for channel-received messages (via relay) | [L3529](../SimpleXChat/ChatTypes.swift#L3529) |
+| `GroupMemberRole` | `.relay` | Role for relay members (below `.observer`) | [L2974](../SimpleXChat/ChatTypes.swift#L2974) |
+| `CIDirection` | `.channelRcv` | Message direction for channel-received messages (via relay) | [L3737](../SimpleXChat/ChatTypes.swift#L3737) |
+
+### Comments-Related Data Model (Channel Comments)
+
+A **comment** is a `ChatItem` whose `parentChatItemId` references a channel post. The parent post is the only `ChatItem` that carries `commentsTotal`/`commentsDisabled`. Comments live in a secondary `ItemsModel` keyed by [`.groupChannelMsgContext(parent:)`](#secondaryitemsmodelfilter); the channel-post-list view (slice 4) uses `commentsTotal` to render the comments-button counter.
+
+#### New Fields on Existing Types
+
+| Type | Field | Type | Description | Line |
+|------|-------|------|-------------|------|
+| `ChatItem` | `parentChatItemId` | `Int64?` | Parent post id if this item is a comment. Hoisted from `CIMeta.parentChatItemId` on decode for caller ergonomics; `nil` means the item is not a comment. | [L3289](../SimpleXChat/ChatTypes.swift#L3289) |
+| `ChatItem` | `commentsTotal` | `Int` | Total comments under this item (only meaningful when this item is a channel post). Defaults to `0` via `decodeIfPresent ?? 0`, mirroring Haskell `omittedField`. | [L3290](../SimpleXChat/ChatTypes.swift#L3290) |
+| `ChatItem` | `commentsDisabled` | `Bool` | Whether the channel owner has disabled comments under this post. Defaults to `false` via `decodeIfPresent ?? false`. | [L3291](../SimpleXChat/ChatTypes.swift#L3291) |
+| `CIMeta` | `itemSharedMsgId` | `String?` | Shared message id (`SharedMsgId`) used to address this item across members. Needed to open a comments thread under an owner-side parent that has just been sent. | [L3783](../SimpleXChat/ChatTypes.swift#L3783) |
+
+The three `ChatItem` fields are wire-encoded inside the nested `meta` object (Haskell `CIMeta`). The iOS [`ChatItem.init(from decoder:)`](../SimpleXChat/ChatTypes.swift#L3304-L3320) hoists them to `ChatItem` level so that view code can write `ci.parentChatItemId` and `ci.commentsTotal` directly without descending into `ci.meta`. Encoding round-trips remain wire-compatible because the iOS `ChatItem` is `Decodable`-only.
+
+#### New Types
+
+| Type | Kind | Description | Line |
+|------|------|-------------|------|
+| `ChannelMsgInfo` | `struct` | Local-only carrier for the comments-thread view. See [§7 ChannelMsgInfo](#channelmsginfo). | [L2028](../SimpleXChat/ChatTypes.swift#L2028) |
 
 ---