diff --git a/crates/manager-core/src/authz.rs b/crates/manager-core/src/authz.rs
index 45b7b1c..a125b5d 100644
--- a/crates/manager-core/src/authz.rs
+++ b/crates/manager-core/src/authz.rs
@@ -1382,6 +1382,64 @@ mod tests {
         );
     }
 
+    /// §11.6 D2/D3: shared-topic PUBLISH and shared-queue ENQUEUE are writes, so
+    /// they require editor+ on the owning group. The three older group data caps
+    /// (KV/docs/files) have this test; these two — the newest, and the ones whose
+    /// blast radius is an entire subtree's handlers — did not. A `role_satisfies`
+    /// regression that let a Viewer publish/enqueue would go uncaught otherwise.
+    #[tokio::test]
+    async fn group_pubsub_and_queue_write_caps_require_editor() {
+        let repo = InMemoryAuthzRepo::default();
+        let root = GroupId::new();
+        let team = GroupId::new();
+        repo.add_group(root, None).await;
+        repo.add_group(team, Some(root)).await;
+
+        // A Viewer at root is denied BOTH writes on a descendant group.
+        let viewer = principal(InstanceRole::Member);
+        repo.grant_group(viewer.user_id, root, AppRole::Viewer)
+            .await;
+        for cap in [
+            Capability::GroupPubsubPublish(team),
+            Capability::GroupQueueEnqueue(team),
+        ] {
+            assert_eq!(
+                can(&repo, &viewer, cap).await.unwrap(),
+                Decision::Deny,
+                "a Viewer must not publish/enqueue into a shared group collection"
+            );
+        }
+
+        // An Editor at root is allowed both (resolved up the chain).
+        let editor = principal(InstanceRole::Member);
+        repo.grant_group(editor.user_id, root, AppRole::Editor)
+            .await;
+        for cap in [
+            Capability::GroupPubsubPublish(team),
+            Capability::GroupQueueEnqueue(team),
+        ] {
+            assert!(
+                can(&repo, &editor, cap).await.unwrap().is_allow(),
+                "an Editor on the owning group's ancestor must be allowed"
+            );
+        }
+
+        // An unrelated member gets neither.
+        let outsider = principal(InstanceRole::Member);
+        assert_eq!(
+            can(&repo, &outsider, Capability::GroupPubsubPublish(team))
+                .await
+                .unwrap(),
+            Decision::Deny
+        );
+        assert_eq!(
+            can(&repo, &outsider, Capability::GroupQueueEnqueue(team))
+                .await
+                .unwrap(),
+            Decision::Deny
+        );
+    }
+
     #[tokio::test]
     async fn group_docs_caps_resolve_by_role_up_the_chain() {
         // §11.6 docs: same trust shape as shared KV — read is viewer+, write is