diff --git a/companion/codex_display/hook_events.py b/companion/codex_display/hook_events.py
index 315cfdc..4a7bcd6 100644
--- a/companion/codex_display/hook_events.py
+++ b/companion/codex_display/hook_events.py
@@ -59,7 +59,7 @@ def extra_count(self, base_active_paths: Set[str]) -> int:
                     continue
                 identities.add(("path", path))
             else:
-                identities.add(("turn", key))
+                identities.add(("session", key[0]))
         return len(identities)
 
     async def process_event(self, event: Dict[str, object]) -> None:
diff --git a/companion/tests/test_hook_events.py b/companion/tests/test_hook_events.py
index f8a6a37..99f790b 100644
--- a/companion/tests/test_hook_events.py
+++ b/companion/tests/test_hook_events.py
@@ -64,6 +64,25 @@ async def test_pathless_stop_clears_sidechat_immediately(self):
 
         self.assertEqual(self.tracker.extra_count(set()), 0)
 
+    async def test_pathless_turns_are_deduplicated_by_session(self):
+        first = self._event("UserPromptSubmit")
+        first["transcript_path"] = None
+        await self.tracker.process_event(first)
+
+        second = self._event("UserPromptSubmit")
+        second["turn_id"] = "turn-2"
+        second["transcript_path"] = None
+        await self.tracker.process_event(second)
+
+        self.assertEqual(self.tracker.extra_count(set()), 1)
+
+        third = self._event("UserPromptSubmit")
+        third["session_id"] = "session-2"
+        third["transcript_path"] = None
+        await self.tracker.process_event(third)
+
+        self.assertEqual(self.tracker.extra_count(set()), 2)
+
     async def test_unconfirmed_submit_expires(self):
         tracker = HookActivityTracker(
             self.changed,