start implementation on new architecture

sia/stop_command.py

@@ -0,0 +1,30 @@
+from .command import Command
+from .command_result import CommandResult
+from .working_memory import WorkingMemory
+
+class StopCommand(Command):
+    """
+    Command to stop the agent.
+    Performs cleanup on all entries and clears working memory.
+    """
+    
+    def execute(self, memory: WorkingMemory) -> CommandResult:
+        """
+        Signal that the agent should stop.
+        Cleans up all entries and clears the working memory.
+        
+        Args:
+            memory: WorkingMemory instance to clear
+            
+        Returns:
+            CommandResult: Stop result
+        """
+        # Get a copy of entries to iterate over
+        entries = memory.get_entries()
+        
+        # Clean up each entry individually
+        for entry in entries:
+            entry.cleanup()
+            memory.remove_entry(entry.id)
+            
+        return CommandResult.stop()