diff --git a/pkg/core/boot.py b/pkg/core/boot.py
index 6a395c7f..2e5a2b6c 100644
--- a/pkg/core/boot.py
+++ b/pkg/core/boot.py
@@ -1,27 +1,7 @@
 from __future__ import print_function
 
-import sys
-
-from .bootutils import files
-from .bootutils import log
-from .bootutils import config
-
 from . import app
-from ..pipeline import pool
-from ..pipeline import controller
-from ..pipeline import stagemgr
 from ..audit import identifier
-from ..provider.session import sessionmgr as llm_session_mgr
-from ..provider.requester import modelmgr as llm_model_mgr
-from ..provider.sysprompt import sysprompt as llm_prompt_mgr
-from ..provider.tools import toolmgr as llm_tool_mgr
-from ..platform import manager as im_mgr
-from ..command import cmdmgr
-from ..plugin import manager as plugin_mgr
-from ..audit.center import v2 as center_v2
-from ..utils import version, proxy, announce
-
-from .stages import build_app, load_config, setup_logger
 from . import stage
 
 
diff --git a/pkg/core/stage.py b/pkg/core/stage.py
index cb2e4868..cb8e90eb 100644
--- a/pkg/core/stage.py
+++ b/pkg/core/stage.py
@@ -6,7 +6,7 @@ import typing
 from . import app
 
 
-preregistered_stages: list[typing.Type[BootingStage]] = {}
+preregistered_stages: dict[str, typing.Type[BootingStage]] = {}
 
 def stage_class(
     name: str