diff --git a/api/routes_admin.py b/api/routes_admin.py
index 4a35aa2..21d3e4c 100644
--- a/api/routes_admin.py
+++ b/api/routes_admin.py
@@ -145,9 +145,12 @@ integration's rollover listener shares:
 
 - ``POST /missed-sweep`` runs the sweep for the API host's local
   ``today`` (ONE :func:`_local_now` clock read threaded into the core
-  call) and publishes each returned ``nestquest_quest_missed`` event
-  on the SSE stream through
-  :func:`api.transitions.publish_quest_missed`.  The watermark rule
+  call) and publishes each returned ``(event_type, payload)`` pair
+  DIRECTLY on the app's ONE transition publisher — the sweep-built
+  payload, never re-fetched (the core commits its watermark before
+  returning, so a failed re-fetch after it would lose the missed event
+  forever), the same publish-what-the-core-built shape
+  api/scheduler.py uses.  The watermark rule
   (a same-day rerun announces nothing, a post-downtime run sweeps the
   accumulated window once), the no-completion-event rule and the
   read-only-over-the-domain-tables guarantee all live in the core; the
@@ -1697,13 +1700,22 @@ async def admin_run_missed_sweep(
     once).  The route is read-only over the domain tables: it never
     mutates an instance and never writes a completion event.
 
-    Each returned event is published on the SSE stream through
-    :func:`api.transitions.publish_quest_missed` (the payload built by
-    the core builder, never hand-built here; fan-out is
-    fire-and-forget, see api/events.py).  The response reports
-    ``fired`` — the number of transitions published.  Error mapping
-    (:func:`_raise_sweep_error`): every core ``ValueError`` is 422;
-    anything else re-raises.
+    Each returned ``(event_type, payload)`` pair is published DIRECTLY
+    on the app's ONE transition publisher (``request.app.state.publisher``,
+    fan-out fire-and-forget, see api/events.py) — the exact payload the
+    sweep built, never re-fetched and never hand-built here, the same
+    publish-what-the-core-built shape api/scheduler.py uses.  This is a
+    correctness rule, not a style preference: the core commits the
+    idempotency watermark BEFORE returning, so a re-fetch-based publish
+    loop opens a loss window — a concurrent regenerate deleting the
+    instance, or a transient database error, would raise uncaught (a
+    bare 500) AFTER the watermark advanced, and no future sweep would
+    ever re-examine that instance.  Publishing the built payload leaves
+    no such window, and every event of one run keeps the ONE shared
+    ``occurred_at`` stamp the sweep computed for it.  The response
+    reports ``fired`` — the number of transitions published.  Error
+    mapping (:func:`_raise_sweep_error`): every core ``ValueError`` is
+    422; anything else re-raises.
     """
     state: DatabaseState = request.app.state.db
     database = state.database
@@ -1712,12 +1724,8 @@ async def admin_run_missed_sweep(
         events = await core_sweep.run_missed_sweep(database, today=today)
     except ValueError as error:
         _raise_sweep_error(error)
-    for _event_type, payload in events:
-        await api_transitions.publish_quest_missed(
-            database,
-            int(payload["instance_id"]),
-            request.app.state.publisher,
-        )
+    for event_type, payload in events:
+        request.app.state.publisher.publish(event_type, payload)
     return AdminMissedSweepResponse(fired=len(events))
 
 
diff --git a/api/scheduler.py b/api/scheduler.py
index 503360d..32dcc07 100644
--- a/api/scheduler.py
+++ b/api/scheduler.py
@@ -170,4 +170,4 @@ class MissedSweepScheduler:
         )
 
 
-__all__ = ["MissedSweepScheduler"]
\ No newline at end of file
+__all__ = ["MissedSweepScheduler"]
diff --git a/custom_components/nestquest/core/sweep.py b/custom_components/nestquest/core/sweep.py
index a23bc15..346893a 100644
--- a/custom_components/nestquest/core/sweep.py
+++ b/custom_components/nestquest/core/sweep.py
@@ -140,4 +140,4 @@ async def run_missed_sweep(
         today_iso,
         len(events),
     )
-    return events
\ No newline at end of file
+    return events
diff --git a/tests/test_api_missed_sweep.py b/tests/test_api_missed_sweep.py
index 8ba0708..c86c9a5 100644
--- a/tests/test_api_missed_sweep.py
+++ b/tests/test_api_missed_sweep.py
@@ -19,6 +19,14 @@ stream needs a live server), plus the API service's daily scheduler:
 - A run after downtime (``today`` advanced two days) publishes the
   accumulated window once — the instance due on day one fires on the
   catch-up run — and a further rerun is silent again.
+- Publishing is the api/scheduler.py shape — the sweep-BUILT
+  ``(event_type, payload)`` pairs go straight to the publisher, no
+  per-event re-fetch: all events of one run share the run's ONE
+  ``occurred_at`` stamp, and a deterministic concurrent-deletion case
+  (the sweep is wrapped to delete one swept instance after it built
+  its events and committed its watermark) still answers 200 and
+  streams every built event — a re-fetch there would 500 and lose the
+  missed event forever.
 - The daily scheduler (:class:`api.scheduler.MissedSweepScheduler`)
   computes the delay to the configured ``day_rollover_time``, runs the
   sweep when the (injectable) clock reaches it, publishes the built
@@ -79,6 +87,7 @@ _recurrence = importlib.import_module("nestquest_core.recurrence")
 _dao_instances = importlib.import_module("nestquest_core.dao_instances")
 _dao_meta = importlib.import_module("nestquest_core.dao_meta")
 _settings_store = importlib.import_module("nestquest_core.settings_store")
+_core_sweep = importlib.import_module("nestquest_core.sweep")
 
 #: The well-known ``nestquest_meta_state`` key holding the sweep
 #: watermark — asserted literally so the contract is pinned here.
@@ -337,6 +346,7 @@ async def test_trigger_publishes_one_missed_event_per_instance(
         assert payload["due_date"] == seed.yesterday_iso
         assert payload["due_time"] == "09:00"
         assert payload["occurred_at"]  # strict UTC ISO-8601 stamp
+        run_stamp = payload["occurred_at"]
 
         event_type, payload = await stream.next_event()
         assert event_type == EVENT_QUEST_MISSED
@@ -347,7 +357,10 @@ async def test_trigger_publishes_one_missed_event_per_instance(
         assert payload["window"] == "evening"
         assert payload["due_date"] == seed.yesterday_iso
         assert payload["due_time"] == "18:30"
-        assert payload["occurred_at"]
+        # One run, ONE stamp: the route publishes the sweep-built
+        # payloads directly, so every event of this run carries the
+        # same ``occurred_at`` the sweep computed for the whole run.
+        assert payload["occurred_at"] == run_stamp
 
         # Exactly one transition per instance: today's not-past-due
         # quest never arrives.
@@ -359,6 +372,80 @@ async def test_trigger_publishes_one_missed_event_per_instance(
     assert _watermark(ns.server) == seed.today_iso
 
 
+async def test_trigger_publishes_sweep_built_payloads_without_refetch(
+    missed_app,
+) -> None:
+    """Publishing never re-fetches: a concurrently deleted instance
+    cannot fail the trigger or lose its already-built missed event.
+
+    The core sweep commits the idempotency watermark BEFORE returning,
+    so a publish loop that re-fetches each instance opens a loss
+    window: an instance deleted inside that window (e.g. a concurrent
+    regenerate) would raise ``ValueError`` uncaught — a bare 500 — and
+    the missed event would be gone forever (the watermark already
+    advanced, so no future sweep re-examines it).  The route publishes
+    the sweep-built ``(event_type, payload)`` pairs DIRECTLY (the
+    api/scheduler.py shape), which this test exercises deterministically:
+    the sweep is wrapped to delete one swept instance AFTER the sweep
+    built its events and committed its watermark but BEFORE the route
+    publishes, and the trigger must still answer 200 with ``fired: 2``
+    and stream BOTH sweep-built payloads — the deleted instance's
+    included, stamped with the run's ONE shared ``occurred_at``.
+    """
+    ns = missed_app
+    seed = ns.seed
+    database = ns.server.app.state.db.database
+    original_sweep = _core_sweep.run_missed_sweep
+
+    async def sweep_then_delete_stale(sweep_database, *, today):
+        events = await original_sweep(sweep_database, today=today)
+        # The concurrent deletion lands after the sweep built its
+        # events and committed its watermark, but before the route
+        # publishes: the row is gone while the built event survives.
+        await sweep_database.execute(
+            "DELETE FROM quest_instances WHERE id = ?",
+            (seed.stale_instance.id,),
+        )
+        return events
+
+    _core_sweep.run_missed_sweep = sweep_then_delete_stale
+    try:
+        stream = _stream(ns.server.url("/api/v1/panel/events"))
+        async with stream:
+            response = await ns.client.post(
+                "/api/v1/admin/missed-sweep", headers=_admin_headers()
+            )
+            assert response.status_code == 200
+            assert response.json() == {"fired": 2}
+
+            # The FIRST event is the deleted instance's — published
+            # from the payload built before the deletion, never
+            # re-fetched after it (a re-fetch would 500 here).
+            event_type, payload = await stream.next_event()
+            assert event_type == EVENT_QUEST_MISSED
+            assert payload["instance_id"] == seed.stale_instance.id
+            assert payload["child_name"] == "Ada"
+            assert payload["quest_title"] == "Stale chore"
+            assert payload["window"] == "morning"
+            assert payload["due_date"] == seed.yesterday_iso
+            assert payload["occurred_at"]
+            run_stamp = payload["occurred_at"]
+
+            event_type, payload = await stream.next_event()
+            assert event_type == EVENT_QUEST_MISSED
+            assert payload["instance_id"] == seed.old_instance.id
+            assert payload["occurred_at"] == run_stamp
+
+            with pytest.raises(asyncio.TimeoutError):
+                await asyncio.wait_for(stream.queue.get(), timeout=0.3)
+    finally:
+        _core_sweep.run_missed_sweep = original_sweep
+
+    # The watermark advanced even though one instance was deleted
+    # mid-flight — nothing was lost to the publish-time failure window.
+    assert _watermark(ns.server) == seed.today_iso
+
+
 async def test_same_day_rerun_publishes_nothing(missed_app) -> None:
     """A second trigger the same day publishes nothing (the watermark)."""
     ns = missed_app