插件系统代码风格修复

src/plugin_runtime/host/capability_service.py

@@ -31,7 +31,7 @@ class CapabilityService:
     4. 执行实际操作并返回结果
     """
 
-    def __init__(self, policy_engine: PolicyEngine):
+    def __init__(self, policy_engine: PolicyEngine) -> None:
         self._policy = policy_engine
         # capability_name -> implementation
         self._implementations: Dict[str, CapabilityImpl] = {}

src/plugin_runtime/host/component_registry.py

@@ -11,10 +11,10 @@
 
 from typing import Any, Dict, List, Optional
 
-from src.common.logger import get_logger
-
 import re
 
+from src.common.logger import get_logger
+
 logger = get_logger("plugin_runtime.host.component_registry")
 
 
@@ -32,7 +32,7 @@ class RegisteredComponent:
         component_type: str,
         plugin_id: str,
         metadata: Dict[str, Any],
-    ):
+    ) -> None:
         self.name = name
         self.full_name = f"{plugin_id}.{name}"
         self.component_type = component_type
@@ -57,7 +57,7 @@ class ComponentRegistry:
     供业务层查询可用组件、匹配命令、调度 action/event 等。
     """
 
-    def __init__(self):
+    def __init__(self) -> None:
         # 全量索引
         self._components: Dict[str, RegisteredComponent] = {}  # full_name -> comp
 

src/plugin_runtime/host/policy_engine.py

@@ -22,7 +22,7 @@ class PolicyEngine:
     管理所有插件的能力令牌，提供授权校验。
     """
 
-    def __init__(self):
+    def __init__(self) -> None:
         self._tokens: Dict[str, CapabilityToken] = {}
 
     def register_plugin(

src/plugin_runtime/host/supervisor.py

@@ -7,11 +7,11 @@
 4. 优雅关停
 """
 
-import logging as stdlib_logging
 from typing import Any, Dict, List, Optional, Tuple
 
 import asyncio
 import contextlib
+import logging as stdlib_logging
 import os
 import sys
 
@@ -559,9 +559,12 @@ class PluginSupervisor:
         task.add_done_callback(
             lambda done_task: None
             if self._stderr_drain_task is not done_task
-            else setattr(self, "_stderr_drain_task", None)
+            else self._clear_stderr_drain_task()
         )
 
+    def _clear_stderr_drain_task(self) -> None:
+        self._stderr_drain_task = None
+
     async def _drain_runner_stderr(
         self,
         stream: asyncio.StreamReader,
@@ -578,8 +581,7 @@ class PluginSupervisor:
                 line = await stream.readline()
                 if not line:
                     break
-                message = line.decode(errors="replace").rstrip()
-                if message:
+                if message := line.decode(errors="replace").rstrip():
                     # 将 stderr 输出以 WARNING 级展示：
                     # 如果 Runner 正常运行，此流应当无输出；
                     # 有输出说明进程级错误发生，需要出现在主进程日志中

src/plugin_runtime/host/workflow_executor.py

@@ -54,7 +54,7 @@ class ModificationRecord:
     """消息修改记录"""
     __slots__ = ("stage", "hook_name", "timestamp", "fields_changed")
 
-    def __init__(self, stage: str, hook_name: str, fields_changed: List[str]):
+    def __init__(self, stage: str, hook_name: str, fields_changed: List[str]) -> None:
         self.stage = stage
         self.hook_name = hook_name
         self.timestamp = time.perf_counter()
@@ -64,7 +64,7 @@ class ModificationRecord:
 class WorkflowContext:
     """Workflow 执行上下文"""
 
-    def __init__(self, trace_id: Optional[str] = None, stream_id: Optional[str] = None):
+    def __init__(self, trace_id: Optional[str] = None, stream_id: Optional[str] = None) -> None:
         self.trace_id = trace_id or uuid.uuid4().hex
         self.stream_id = stream_id
         self.timings: Dict[str, float] = {}
@@ -92,7 +92,7 @@ class WorkflowResult:
         return_message: str = "",
         stopped_at: str = "",
         diagnostics: Optional[Dict[str, Any]] = None,
-    ):
+    ) -> None:
         self.status = status
         self.return_message = return_message
         self.stopped_at = stopped_at
@@ -109,7 +109,7 @@ class WorkflowExecutor:
     实现 stage-based pipeline + per-stage hook chain with priority + early return。
     """
 
-    def __init__(self, registry: ComponentRegistry):
+    def __init__(self, registry: ComponentRegistry) -> None:
         self._registry = registry
 
     async def execute(