diff --git a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/agent_tools/creation.rs b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/agent_tools/creation.rs
index 6b2dacc91..b4095a084 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/ui_editor/agent_tools/creation.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/ui_editor/agent_tools/creation.rs
@@ -91,7 +91,13 @@ pub(crate) fn create_ui_design_doc_from_images(
         Ok(asset) => asset,
         Err(error) => {
             let _ = fs::remove_file(&absolute_path);
-            return Err(error);
+            // 文档没登记成功时，本次顺带登记的设计图也不该留在 manifest 里。
+            return match drop_manifest_assets(root, &[], &registered_image_ids) {
+                Ok(()) => Err(error),
+                Err(rollback_error) => Err(format!(
+                    "UI 设计文档登记失败：{error}；reconciliation-required: 回滚未完成：{rollback_error}"
+                )),
+            };
         }
     };
     if let Err(error) =
@@ -279,14 +285,23 @@ fn rollback_created_document(
     registered_image_ids: &[String],
     absolute_path: &Path,
 ) -> Result<(), String> {
-    let mut manifest = read_existing_manifest_for_project(root)?;
-    manifest
-        .assets
-        .retain(|entry| entry.id != asset_id && !registered_image_ids.contains(&entry.id));
-    write_manifest(&root.join(".agent/manifest.json"), &manifest)?;
+    drop_manifest_assets(root, &[asset_id], registered_image_ids)?;
     fs::remove_file(absolute_path).map_err(|error| format!("删除未完成 UI 设计资源失败：{error}"))
 }
 
+/// 把本次新建或新登记、但已判定失败的资源条目从 manifest 里摘掉。
+fn drop_manifest_assets(
+    root: &Path,
+    asset_ids: &[&str],
+    registered_image_ids: &[String],
+) -> Result<(), String> {
+    let mut manifest = read_existing_manifest_for_project(root)?;
+    manifest.assets.retain(|entry| {
+        !asset_ids.contains(&entry.id.as_str()) && !registered_image_ids.contains(&entry.id)
+    });
+    write_manifest(&root.join(".agent/manifest.json"), &manifest)
+}
+
 /// UI 设计文档的确定性命名：从已登记文档数 + 1 起找第一个既未被占用、
 /// 也未登记进 manifest 的 `ui/UI 设计 N.json`，不覆盖任何既有文件。
 pub(crate) fn next_ui_design_path(