feat：可开启原生at功能

pytests/test_maisaka_builtin_context.py

@@ -3,7 +3,8 @@ from types import SimpleNamespace
 
 from src.chat.message_receive.message import SessionMessage
 from src.common.data_models.mai_message_data_model import MessageInfo, UserInfo
-from src.common.data_models.message_component_data_model import MessageSequence, ReplyComponent, TextComponent
+from src.common.data_models.message_component_data_model import AtComponent, MessageSequence, ReplyComponent, TextComponent
+from src.config.config import global_config
 from src.maisaka.builtin_tool.context import BuiltinToolRuntimeContext
 
 
@@ -45,3 +46,53 @@ def test_append_sent_message_to_chat_history_keeps_message_id() -> None:
     assert history_message.message_id == "real-message-id"
     assert "[msg_id]real-message-id\n" in history_message.raw_message.components[0].text
     assert "[msg_id:real-message-id]" in history_message.visible_text
+
+
+def test_post_process_reply_message_sequences_converts_at_marker_before_bracket_cleanup(monkeypatch) -> None:
+    monkeypatch.setattr(global_config.chat, "enable_at", True)
+    monkeypatch.setattr(
+        "src.maisaka.builtin_tool.context.process_llm_response",
+        lambda text: [text.strip()] if text.strip() else [],
+    )
+    target_message = SimpleNamespace(
+        message_info=SimpleNamespace(
+            user_info=SimpleNamespace(
+                user_id="target-user",
+                user_nickname="目标昵称",
+                user_cardname="群名片",
+            )
+        )
+    )
+    runtime = SimpleNamespace(_source_messages_by_id={"12160142": target_message})
+    engine = SimpleNamespace(_get_runtime_manager=lambda: None)
+    tool_ctx = BuiltinToolRuntimeContext(engine=engine, runtime=runtime)
+
+    sequences = tool_ctx.post_process_reply_message_sequences("at[12160142] 就这个群")
+
+    assert len(sequences) == 1
+    components = sequences[0].components
+    assert isinstance(components[0], AtComponent)
+    assert components[0].target_user_id == "target-user"
+    assert components[0].target_user_nickname == "目标昵称"
+    assert components[0].target_user_cardname == "群名片"
+    assert isinstance(components[1], TextComponent)
+    assert components[1].text == " 就这个群"
+
+
+def test_post_process_reply_message_sequences_ignores_at_marker_when_disabled(monkeypatch) -> None:
+    monkeypatch.setattr(global_config.chat, "enable_at", False)
+    monkeypatch.setattr(
+        "src.maisaka.builtin_tool.context.process_llm_response",
+        lambda text: [text.strip()] if text.strip() else [],
+    )
+    runtime = SimpleNamespace(_source_messages_by_id={})
+    engine = SimpleNamespace(_get_runtime_manager=lambda: None)
+    tool_ctx = BuiltinToolRuntimeContext(engine=engine, runtime=runtime)
+
+    sequences = tool_ctx.post_process_reply_message_sequences("at[12160142] 就这个群")
+
+    assert len(sequences) == 1
+    components = sequences[0].components
+    assert len(components) == 1
+    assert isinstance(components[0], TextComponent)
+    assert components[0].text == "at[12160142] 就这个群"