diff --git a/src/tracker/ws/handler.py b/src/tracker/ws/handler.py
index 51fd0e2..8a1ec2e 100644
--- a/src/tracker/ws/handler.py
+++ b/src/tracker/ws/handler.py
@@ -330,7 +330,7 @@ async def _handle_chat_send(session_id: str, data: dict):
                 return
 
         if project_id:
-            await manager.broadcast_message(project_id, msg_data, author_slug=slug)
+            await manager.broadcast_message(project_id, msg_data, author_slug=slug, author_session_id=session_id)
         else:
             await manager.broadcast_all(
                 {"type": WSEventType.MESSAGE_NEW, "data": msg_data},
diff --git a/src/tracker/ws/manager.py b/src/tracker/ws/manager.py
index 902a70b..69364e7 100644
--- a/src/tracker/ws/manager.py
+++ b/src/tracker/ws/manager.py
@@ -79,11 +79,11 @@ class ConnectionManager:
             except Exception:
                 await self.disconnect(client.session_id)
 
-    async def broadcast_message(self, project_id: str, message: dict, author_slug: str):
+    async def broadcast_message(self, project_id: str, message: dict, author_slug: str, author_session_id: str | None = None):
         """Broadcast message.new. Humans get everything, agents filtered.
         
         Filtering for agents:
-        - Skip own messages (author_slug == client slug)
+        - Skip author's session (by session_id if available, else by slug)
         - Skip if not subscribed to project
         - Skip if chat_listen == "none"
         - If chat_listen == "mentions": only if @slug in mentions
@@ -95,7 +95,10 @@ class ConnectionManager:
         payload = {"type": WSEventType.MESSAGE_NEW, "data": message}
 
         for session_id, client in list(self.sessions.items()):
-            if client.member_slug == author_slug:
+            # Skip only the sending session, not all sessions of the same user
+            if author_session_id and session_id == author_session_id:
+                continue
+            if not author_session_id and client.member_slug == author_slug:
                 continue
             # Humans/bridges get ALL messages
             if client.member_type in (MemberType.HUMAN, MemberType.BRIDGE):