diff --git a/tests/test_new_serve_stack.py b/tests/test_new_serve_stack.py
index 140a8a3..c14f2b0 100644
--- a/tests/test_new_serve_stack.py
+++ b/tests/test_new_serve_stack.py
@@ -49,6 +49,14 @@ def tracker(self):
     def test_empty_ingest_returns_empty(self, tracker):
         assert tracker.ingest({"type": "unknown"}) == [{"type": "unknown"}]
 
+    @pytest.mark.parametrize("event_type", [
+        "plugin.added",
+        "connector.updated",
+        "reference.updated",
+    ])
+    def test_bootstrap_lifecycle_events_silently_dropped(self, tracker, event_type):
+        assert tracker.ingest({"type": event_type, "properties": {"id": "test"}}) == []
+
     def test_delta_accumulates_text(self, tracker):
         tracker.ingest({
             "type": "message.part.delta",
diff --git a/tools/events/state_tracker.py b/tools/events/state_tracker.py
index c083fb9..7eae384 100644
--- a/tools/events/state_tracker.py
+++ b/tools/events/state_tracker.py
@@ -112,7 +112,9 @@ def ingest(self, event: dict[str, Any]) -> list[dict[str, Any]]:
             mapped = self._map_session_diff(event)
             return [mapped] if mapped else []
 
-        if event_type == "session.updated":
+        if event_type in ("session.updated",
+                          "plugin.added", "connector.updated",
+                          "reference.updated"):
             return []
 
         # Pass-through events that don't need accumulation.