diff --git a/src/ai_client.py b/src/ai_client.py
index f70560b3..d85bbd4d 100644
--- a/src/ai_client.py
+++ b/src/ai_client.py
@@ -1522,14 +1522,14 @@ def _get_gemini_history_list(chat: Any | None) -> list[Any]:
   return cast(list[Any], chat.get_history())
  return []
 
-def _send_gemini(md_content: str, user_message: str, base_dir: str,
+def _send_gemini_result(md_content: str, user_message: str, base_dir: str,
  file_items: list[dict[str, Any]] | None = None,
  discussion_history: str = "",
  pre_tool_callback: Optional[Callable[[str, str, Optional[Callable[[str], str]]], Optional[str]]] = None,
  qa_callback: Optional[Callable[[str], str]] = None,
  enable_tools: bool = True,
  stream_callback: Optional[Callable[[str], None]] = None,
- patch_callback: Optional[Callable[[str, str], Optional[str]]] = None) -> str:
+ patch_callback: Optional[Callable[[str, str], Optional[str]]] = None) -> Result[str]:
  """
   [C: src/ai_server.py:_handle_send, tests/test_tier4_interceptor.py:test_gemini_provider_passes_qa_callback_to_run_script]
  """
@@ -1753,10 +1753,10 @@ def _send_gemini(md_content: str, user_message: str, base_dir: str,
    payload = f_resps
   res = "\n\n".join(all_text) if all_text else "(No text returned)"
   if monitor.enabled: monitor.end_component("ai_client._send_gemini")
-  return res
+  return Result(data=res)
  except Exception as e:
   if monitor.enabled: monitor.end_component("ai_client._send_gemini")
-  raise _classify_gemini_error(e) from e
+  return Result(data="", errors=[_classify_gemini_error(e, source="ai_client.gemini")])
 
 def _send_gemini_cli(md_content: str, user_message: str, base_dir: str,
  file_items: list[dict[str, Any]] | None = None,