Fix workflow system prompt bugs.

src/aios_kernel/agent.py

@@ -6,6 +6,7 @@ import logging
 import uuid
 import time
 import json
+import shlex
 
 from .agent_message import AgentMsg, AgentMsgStatus, AgentMsgType
 from .chatsession import AIChatSession
@@ -15,7 +16,6 @@ from .environment import Environment
 
 logger = logging.getLogger(__name__)
 
-
 class AgentPrompt:
     def __init__(self) -> None:
         self.messages = []