remove the tmux-era TranscriptPublisher class (T-385)

No production code constructed it since the stream-json pivot (D-77)
— only its own test did. The ClaudeConversation bus-addressing
constants stay; the meta sidebar and team panel host still consume
them for member-status messages. The companion finding — the team
roster surfaces listening to TeamMemberJoined events nothing emits —
is real rewiring work, split out as T-396 (drive the roster from
TeamBroker membership, then delete the ghost event types).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

lib/builtin/claude/src/transcript_publisher.dart

@@ -1,18 +1,14 @@
-/// Bridges a [TranscriptReader] onto the kernel [MessageBus] (epic T-132,
-/// D-75).
+/// Bus addressing for Claude conversation content (epic T-132, D-75).
 ///
-/// One reader tails a workspace transcript; this publisher republishes
-/// every [ConversationItem] as a bus [Message]. Any number of Claude
-/// panels can then subscribe to the same conversation via the bus instead
-/// of each owning its own reader — the decoupling the team panels
-/// (T-139/T-140) need, where a single observer feeds the lead tile plus a
-/// tile per teammate.
+/// The tmux-era `TranscriptPublisher` that used to live here (one reader
+/// tailing a transcript, republished onto the bus) had no production
+/// constructor calls after the stream-json pivot (D-77) and was removed
+/// in the T-385 dead-code sweep. The [ClaudeConversation] channel/key
+/// constants remain — the meta sidebar and team panel host still consume
+/// them for member-status messages.
 library;
 
-import 'dart:async';
-
 import 'package:clide/builtin/claude/src/transcript_reader.dart';
-import 'package:clide/kernel/src/events/message_bus.dart';
 
 /// Bus addressing for Claude conversation content.
 abstract final class ClaudeConversation {
@@ -29,7 +25,7 @@ abstract final class ClaudeConversation {
   /// Channel for a teammate's conversation (team work, T-139/T-140).
   static String teammateChannel(String agentId) => 'conversation/$agentId';
 
-  /// Key under which the [ConversationItem] travels in a [Message]'s data.
+  /// Key under which the [ConversationItem] travels in a bus message's data.
   static const itemKey = 'item';
 
   /// Shared channel carrying each team member's live status (T-157). Every
@@ -44,32 +40,3 @@ abstract final class ClaudeConversation {
     if (status.contextTokens != null) 'contextTokens': status.contextTokens,
   };
 }
-
-class TranscriptPublisher {
-  /// Starts republishing [reader]'s items onto [messages] under
-  /// [ClaudeConversation.publisher] / [channel]. The subscription is
-  /// attached synchronously, so a controller that subscribes before the
-  /// reader's first poll never misses the initial tail.
-  TranscriptPublisher({required MessageBus messages, required TranscriptReader reader, this.channel = ClaudeConversation.leadChannel})
-    : _messages = messages,
-      _reader = reader {
-    _sub = _reader.stream.listen((item) {
-      _messages.publish(ClaudeConversation.publisher, channel, {ClaudeConversation.itemKey: item});
-    });
-  }
-
-  final MessageBus _messages;
-  final TranscriptReader _reader;
-  final String channel;
-  late final StreamSubscription<ConversationItem> _sub;
-
-  /// Live session status (model / permission-mode / context) from the
-  /// underlying reader — passed through for the status strip (T-145).
-  Stream<SessionStatus> get statusStream => _reader.statusStream;
-
-  /// Stops publishing and tears down the underlying reader.
-  Future<void> dispose() async {
-    await _sub.cancel();
-    await _reader.dispose();
-  }
-}

test/builtin/claude/transcript_publisher_test.dart

@@ -1,78 +1,17 @@
-/// Tests for TranscriptPublisher — bridges a TranscriptReader onto the
-/// kernel MessageBus (T-137/D-75). Pure Dart: MessageBus + reader have no
-/// Flutter dependency, so this runs under `package:test`.
+/// Tests for the ClaudeConversation bus-addressing constants. The
+/// TranscriptPublisher class this file used to cover was removed in the
+/// T-385 dead-code sweep (no production constructor calls since the
+/// stream-json pivot, D-77).
 library;
 
-import 'dart:convert';
-import 'dart:io';
-
 import 'package:clide/builtin/claude/src/transcript_publisher.dart';
 import 'package:clide/builtin/claude/src/transcript_reader.dart';
-import 'package:clide/kernel/src/events/message_bus.dart';
 import 'package:test/test.dart';
 
-Map<String, dynamic> _userLine(String uuid, String text) => {
-  'type': 'user',
-  'uuid': uuid,
-  'parentUuid': '',
-  'isSidechain': false,
-  'version': '2.1.143',
-  'timestamp': '2026-05-16T08:53:06.708Z',
-  'message': {'role': 'user', 'content': text},
-};
-
-Map<String, dynamic> _asstLine(String uuid, String text) => {
-  'type': 'assistant',
-  'uuid': uuid,
-  'parentUuid': '',
-  'isSidechain': false,
-  'version': '2.1.143',
-  'timestamp': '2026-05-16T08:53:07.708Z',
-  'message': {
-    'role': 'assistant',
-    'content': [
-      {'type': 'text', 'text': text},
-    ],
-  },
-};
-
 void main() {
-  group('TranscriptPublisher', () {
-    late Directory base;
-    const workspace = '/pub/ws';
-
-    setUp(() async => base = await Directory.systemTemp.createTemp('transcript_publisher_test_'));
-    tearDown(() async => base.delete(recursive: true));
-
-    // Serialized: this MessageBus republish assertion is timing-sensitive and
-    // flaked in the parallel flutter pool; runs in the --concurrency=1 pass (T-193).
-    test('republishes reader items onto the bus (lead channel + item key)', tags: ['serial'], () async {
-      final dir = Directory('${base.path}/${workspace.replaceAll('/', '-')}');
-      await dir.create(recursive: true);
-      File('${dir.path}/session-abc.jsonl').writeAsStringSync('${[_userLine('u1', 'hello'), _asstLine('a1', 'hi there')].map(jsonEncode).join('\n')}\n');
-
-      final bus = MessageBus();
-      addTearDown(bus.dispose);
-      final received = <Message>[];
-      // Subscribe before the publisher starts the reader's first poll.
-      final sub = bus.subscribe(publisher: ClaudeConversation.publisher, channel: ClaudeConversation.leadChannel).listen(received.add);
-
-      final reader = TranscriptReader(workspace, projectsBase: base.path, pollInterval: const Duration(milliseconds: 20));
-      final pub = TranscriptPublisher(messages: bus, reader: reader);
-
-      await Future<void>.delayed(const Duration(milliseconds: 200));
-      await sub.cancel();
-      await pub.dispose();
-
-      expect(received, hasLength(2));
-      expect(received.every((m) => m.data[ClaudeConversation.itemKey] is ConversationItem), isTrue);
-      final items = received.map((m) => m.data[ClaudeConversation.itemKey]).toList();
-      expect(items.first, isA<UserMessage>());
-      expect((items.first as UserMessage).text, 'hello');
-      expect(items[1], isA<AssistantTextMessage>());
-    });
-
-    test('teammateChannel namespaces by agentId', () {
+  group('ClaudeConversation addressing', () {
+    test('sessionChannel + teammateChannel namespace by id', () {
+      expect(ClaudeConversation.sessionChannel('abc-123'), 'conversation/abc-123');
       expect(ClaudeConversation.teammateChannel('coder@team-x'), 'conversation/coder@team-x');
     });