fix: reduce low-risk pylint issues

app/agent/middleware/skills.py

@@ -157,7 +157,7 @@ def _parse_skill_metadata(  # noqa: C901
             MAX_SKILL_COMPATIBILITY_LENGTH,
             skill_path,
         )
-        compatibility_str = compatibility_str[:MAX_SKILL_COMPATIBILITY_LENGTH]
+        compatibility_str = str(compatibility_str)[:MAX_SKILL_COMPATIBILITY_LENGTH]
 
     # 版本号，默认为 0（表示未设置版本）
     raw_version = frontmatter_data.get("version")

app/agent/tools/base.py

@@ -236,7 +236,8 @@ class MoviePilotTool(BaseTool, metaclass=ABCMeta):
         Returns:
             str: 友好的提示消息，如果返回 None 或空字符串则使用 explanation
         """
-        return None
+        explanation = kwargs.get("explanation")
+        return str(explanation) if explanation else None
 
     @abstractmethod
     async def run(self, **kwargs) -> str:

app/agent/tools/impl/ask_user_choice.py

@@ -26,9 +26,11 @@ class UserChoiceOptionInput(BaseModel):
 
     @model_validator(mode="after")
     def validate_option(self):
-        if not self.label.strip():
+        label = str(self.label)
+        value = str(self.value)
+        if not label.strip():
             raise ValueError("label 不能为空")
-        if not self.value.strip():
+        if not value.strip():
             raise ValueError("value 不能为空")
         return self
 
@@ -55,7 +57,8 @@ class AskUserChoiceInput(BaseModel):
 
     @model_validator(mode="after")
     def validate_payload(self):
-        if not self.message.strip():
+        message = str(self.message)
+        if not message.strip():
             raise ValueError("message 不能为空")
         if not self.options:
             raise ValueError("options 至少需要提供一个")

app/agent/tools/impl/execute_command.py

@@ -6,7 +6,7 @@ import signal
 import subprocess
 from dataclasses import dataclass, field
 from tempfile import NamedTemporaryFile
-from typing import Optional, TextIO, Type
+from typing import Any, Optional, TextIO, Type
 
 from pydantic import BaseModel, Field
 
@@ -188,7 +188,7 @@ class ExecuteCommandTool(MoviePilotTool):
             output.append(stream_name, chunk.decode("utf-8", errors="replace"))
 
     @staticmethod
-    def _terminate_process(process: asyncio.subprocess.Process, sig: int):
+    def _terminate_process(process: Any, sig: int):
         """向进程组发送终止信号；不支持进程组的平台回退为单进程终止。"""
         try:
             if os.name == "posix":
@@ -203,7 +203,7 @@ class ExecuteCommandTool(MoviePilotTool):
     @classmethod
     async def _cleanup_process(
         cls,
-        process: asyncio.subprocess.Process,
+        process: Any,
         wait_task: asyncio.Task,
     ) -> None:
         """先温和终止，失败后强杀，避免超时 shell 遗留子进程。"""