diff --git a/frontend/src/components/subscriptions/SchedulerStatusBar.vue b/frontend/src/components/subscriptions/SchedulerStatusBar.vue
index 59f8bb2..464fce1 100644
--- a/frontend/src/components/subscriptions/SchedulerStatusBar.vue
+++ b/frontend/src/components/subscriptions/SchedulerStatusBar.vue
@@ -27,7 +27,10 @@ import { computed } from 'vue'
 import { formatRelative } from '../../utils/date.js'
 
 const props = defineProps({
-  // { last_tick_at, next_due_at, due_now, auto_sources } | null
+  // { last_tick_at, next_due_at, due_now, auto_sources,
+  //   failing_sources, no_access_sources, platform_cooldowns } | null
+  // This bar renders the scheduling half; the ingestion counts are read by the
+  // front door's FeedStatusRibbon (#387 B3) off the same payload.
   status: { type: Object, default: null },
 })
 
diff --git a/tests/test_api_sources.py b/tests/test_api_sources.py
index 2c0efc1..2d1e773 100644
--- a/tests/test_api_sources.py
+++ b/tests/test_api_sources.py
@@ -55,10 +55,16 @@ async def test_schedule_status_shape(client):
     body = await resp.get_json()
     assert set(body) == {
         "last_tick_at", "next_due_at", "due_now", "auto_sources",
+        "failing_sources", "no_access_sources",
         "platform_cooldowns",
     }
     assert isinstance(body["due_now"], int)
     assert isinstance(body["auto_sources"], int)
+    # #387 B3: the front-door ribbon reads these two. Kept in the exact-set
+    # assertion deliberately — it is what catches a key being renamed out from
+    # under a consumer, which is how this test earned its keep.
+    assert isinstance(body["failing_sources"], int)
+    assert isinstance(body["no_access_sources"], int)
 
 
 @pytest.mark.asyncio
diff --git a/tests/test_api_system_activity.py b/tests/test_api_system_activity.py
index 1322d92..1238e7e 100644
--- a/tests/test_api_system_activity.py
+++ b/tests/test_api_system_activity.py
@@ -62,6 +62,7 @@ async def test_summary_returns_rollup_shape(client, monkeypatch):
     assert isinstance(body["failing"], int)
     assert set(body["scheduler"]) == {
         "last_tick_at", "next_due_at", "due_now", "auto_sources",
+        "failing_sources", "no_access_sources",
         "platform_cooldowns",
     }