diff --git a/frontend/src/api/moments.ts b/frontend/src/api/moments.ts
index bb1e55c0..d4c8e11b 100644
--- a/frontend/src/api/moments.ts
+++ b/frontend/src/api/moments.ts
@@ -44,6 +44,14 @@ export interface RemovedDefault {
   created_at: string | null;
 }
 
+export interface MomentRuleUsage {
+  rule_id: number;
+  /** Null for a rule deleted since it was delivered. */
+  title: string | null;
+  delivered: number;
+  opened: boolean;
+}
+
 export interface MomentUsage {
   /** How many times a mounted rule arrived at this moment. */
   delivered: number;
@@ -53,6 +61,8 @@ export interface MomentUsage {
    *  the door, not the line that prompted it. */
   opened: number;
   last_delivered_at: string | null;
+  /** Each rule delivered here, most delivered first. */
+  by_rule: MomentRuleUsage[];
 }
 
 export interface MomentsPayload {
diff --git a/frontend/src/components/MomentRuleUsage.vue b/frontend/src/components/MomentRuleUsage.vue
new file mode 100644
index 00000000..70578498
--- /dev/null
+++ b/frontend/src/components/MomentRuleUsage.vue
@@ -0,0 +1,37 @@
+<script setup lang="ts">
+import type { MomentRuleUsage } from "@/api/moments";
+
+/**
+ * Which rules a moment delivered, and whether an agent went on to read each.
+ * The moment's own counts cannot say this once two rules are mounted there.
+ * Closed by default: the counts in the row above are what most visits want.
+ */
+defineProps<{ rules: MomentRuleUsage[] }>();
+</script>
+
+<template>
+  <details v-if="rules.length" class="moment-rules">
+    <summary>Rules delivered here</summary>
+    <ul class="delivered-list">
+      <li v-for="r in rules" :key="r.rule_id" class="delivered-row">
+        <span class="delivered-title">{{ r.title ?? `Rule ${r.rule_id} (deleted)` }}</span>
+        <span class="delivered-count">delivered {{ r.delivered }}</span>
+        <span :class="r.opened ? 'delivered-opened' : 'delivered-unopened'">
+          {{ r.opened ? "opened" : "not opened" }}
+        </span>
+      </li>
+    </ul>
+  </details>
+</template>
+
+<style scoped>
+.moment-rules { margin-top: var(--fs-space-2); font-size: var(--fs-size-tiny); }
+.moment-rules summary { cursor: pointer; color: var(--fs-text-tertiary); }
+.delivered-list { list-style: none; margin: var(--fs-space-1) 0 0; padding: 0; display: flex; flex-direction: column; gap: var(--fs-space-1); }
+.delivered-row { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--fs-space-2); font-variant-numeric: tabular-nums; }
+.delivered-title { color: var(--fs-text-primary); font-size: var(--fs-size-body-sm); }
+.delivered-count { color: var(--fs-text-secondary); }
+.delivered-opened { color: var(--fs-text-secondary); }
+/* Not read is a fact about this window, not a fault: quiet, like "nothing mounted". */
+.delivered-unopened { color: var(--fs-text-tertiary); font-style: italic; }
+</style>
diff --git a/frontend/src/components/MomentsSettings.vue b/frontend/src/components/MomentsSettings.vue
index bff473f7..44c8a8e7 100644
--- a/frontend/src/components/MomentsSettings.vue
+++ b/frontend/src/components/MomentsSettings.vue
@@ -2,6 +2,7 @@
 import { computed, onMounted, ref } from "vue";
 import { useMomentsStore } from "@/stores/moments";
 import MomentProposals from "@/components/MomentProposals.vue";
+import MomentRuleUsage from "@/components/MomentRuleUsage.vue";
 import type { MomentAction, MomentUsage } from "@/api/moments";
 import { fmtDate } from "@/utils/dateFormat";
 
@@ -167,6 +168,7 @@ onMounted(() => store.load(true));
               >×</button>
             </span>
           </div>
+          <MomentRuleUsage v-if="usage(m.name)" :rules="usage(m.name)!.by_rule" />
         </li>
       </ul>
 
@@ -186,6 +188,7 @@ onMounted(() => store.load(true));
                 </template>
               </span>
             </div>
+            <MomentRuleUsage v-if="usage(name)" :rules="usage(name)!.by_rule" />
           </li>
         </ul>
       </template>
diff --git a/tests/test_integration_rule_moments.py b/tests/test_integration_rule_moments.py
index ce6e1955..3ba79b37 100644
--- a/tests/test_integration_rule_moments.py
+++ b/tests/test_integration_rule_moments.py
@@ -238,9 +238,10 @@ async def test_the_delivery_lookup_answers_by_home(world):
 
 
 async def test_moment_usage_counts_deliveries_and_the_agent_opens_that_followed(world):
-    """The per-moment readout, on real SQL: an EXISTS inside a
-    COUNT(CASE …) is a shape no mock can vouch for, and the block's own guard
-    would turn a database refusal into a quiet `moment_usage_failed`."""
+    """The per-moment readout, on real SQL: a correlated EXISTS selected as a
+    column beside an outer join is a shape no mock can vouch for, and the
+    block's own guard would turn a database refusal into a quiet
+    `moment_usage_failed`."""
     from datetime import datetime, timedelta, timezone
 
     from sqlalchemy import delete
@@ -289,3 +290,13 @@ async def test_moment_usage_counts_deliveries_and_the_agent_opens_that_followed(
     report = block["by_moment"]["reply.report"]
     assert (report["delivered"], report["rules"], report["opened"]) == (1, 1, 0)
     assert report["last_delivered_at"]
+
+    # Two rules share work.finish: which one arrived, and which was opened.
+    assert finish["by_rule"] == [
+        {"rule_id": rule.id, "title": rule.title, "delivered": 2, "opened": True},
+        {"rule_id": other.id, "title": "Close the task with the push",
+         "delivered": 1, "opened": False},
+    ]
+    assert report["by_rule"] == [
+        {"rule_id": rule.id, "title": rule.title, "delivered": 1, "opened": False},
+    ]