diff --git a/app/src/cloud_object/model/model_test.rs b/app/src/cloud_object/model/model_test.rs
index 1fefaf64758..215ef4b18c4 100644
--- a/app/src/cloud_object/model/model_test.rs
+++ b/app/src/cloud_object/model/model_test.rs
@@ -3,6 +3,7 @@ use lazy_static::lazy_static;
 use settings::{RespectUserSyncSetting, SyncToCloud};
 use warpui::{App, ModelHandle};
 
+use crate::ai::facts::{AIFact, AIFactObjectModel, AIMemory};
 use crate::auth::AuthManager;
 use crate::auth::AuthStateProvider;
 use crate::auth::UserUid;
@@ -938,3 +939,57 @@ fn active_object_uids_matches_naive_with_empty_model() {
         });
     });
 }
+
+// Regression test for #311: deleting a locally-created object (a `SyncId::ClientId`,
+// which is what every object gets now that cloud sync is gone) used to silently no-op
+// because `delete_object_with_initiated_by` required `id.server_id()` to be `Some`.
+#[test]
+fn test_delete_local_object_removes_it() {
+    App::test((), |mut app| async move {
+        initialize_app(&mut app, Vec::new());
+
+        let client_id = ClientId::default();
+        let sync_id = SyncId::ClientId(client_id);
+        UpdateManager::handle(&app).update(&mut app, |update_manager, ctx| {
+            update_manager.create_ai_fact(
+                AIFact::Memory(AIMemory {
+                    is_autogenerated: false,
+                    name: Some("test rule".to_string()),
+                    content: "test content".to_string(),
+                    suggested_logging_id: None,
+                }),
+                client_id,
+                Owner::mock_current_user(),
+                ctx,
+            );
+        });
+
+        ObjectStoreModel::handle(&app).read(&app, |model, _| {
+            assert!(
+                model
+                    .get_object_of_type::<GenericStringObjectId, AIFactObjectModel>(&sync_id)
+                    .is_some(),
+                "rule should exist after creation"
+            );
+        });
+
+        UpdateManager::handle(&app).update(&mut app, |update_manager, ctx| {
+            update_manager.delete_object_by_user(
+                ObjectTypeAndId::GenericStringObject {
+                    object_type: GenericStringObjectFormat::Json(JsonObjectType::AIFact),
+                    id: sync_id,
+                },
+                ctx,
+            );
+        });
+
+        ObjectStoreModel::handle(&app).read(&app, |model, _| {
+            assert!(
+                model
+                    .get_object_of_type::<GenericStringObjectId, AIFactObjectModel>(&sync_id)
+                    .is_none(),
+                "rule should be gone after delete_object_by_user"
+            );
+        });
+    });
+}
diff --git a/app/src/cloud_object/update_manager.rs b/app/src/cloud_object/update_manager.rs
index 58030022164..b16b080fda3 100644
--- a/app/src/cloud_object/update_manager.rs
+++ b/app/src/cloud_object/update_manager.rs
@@ -1440,11 +1440,6 @@ impl UpdateManager {
         initiated_by: InitiatedBy,
         ctx: &mut ModelContext<Self>,
     ) {
-        // If the object isn't known to the server yet, we can't delete it.
-        let Some(server_id) = id.server_id() else {
-            return;
-        };
-
         let uid = id.uid();
         // If there's a pending online-only operation for this object, don't delete it.
         let Some((has_pending_online_only_operation, has_pending_delete)) =
@@ -1464,15 +1459,16 @@ impl UpdateManager {
             return;
         }
 
-        // Zap:云端 delete RPC 已删除,这里折叠为本地直接清除。
-        let num_deleted_objects =
-            self.on_object_delete_success(vec![SyncId::ServerId(server_id)], ctx);
+        // Zap:云端 delete RPC 已删除,这里折叠为本地直接清除。本地对象(SyncId::ClientId)
+        // 没有 server_id;之前这里要求 `id.server_id()` 才能继续,导致本地创建的对象
+        // (例如 AI Rule)永远无法删除,点击 Delete 按钮悄无声息地提前 return。
+        let num_deleted_objects = self.on_object_delete_success(vec![id.sync_id()], ctx);
         ctx.emit(UpdateManagerEvent::ObjectOperationComplete {
             result: ObjectOperationResult {
                 success_type: OperationSuccessType::Success,
                 operation: ObjectOperation::Delete { initiated_by },
                 client_id: None,
-                server_id: Some(ServerId::from_string_lossy(&uid)),
+                server_id: id.server_id(),
                 num_objects: Some(num_deleted_objects),
             },
         });