start implementation on new architecture

sia/delete_command.py

@@ -0,0 +1,42 @@
+from .command import Command
+from .command_result import CommandResult
+from .working_memory import WorkingMemory
+
+class DeleteCommand(Command):
+    """
+    Command to delete an entry from working memory.
+    Ensures proper cleanup of entry resources before removal.
+    
+    Attributes:
+        id: Unique identifier of entry to delete
+    """
+    
+    def __init__(self, id: str):
+        """
+        Initialize delete command.
+        
+        Args:
+            id: Unique identifier of entry to delete
+        """
+        self.id = id
+        
+    def execute(self, memory: WorkingMemory) -> CommandResult:
+        """
+        Delete the specified entry from working memory.
+        Performs cleanup on the entry before removal.
+        
+        Args:
+            memory: WorkingMemory instance to delete entry from
+            
+        Returns:
+            CommandResult: Success if entry was found and deleted,
+                         failure with message if entry not found
+        """
+        entry = memory.get_entry(self.id)
+        if entry is None:
+            return CommandResult.failure(f"Entry with id '{self.id}' not found")
+            
+        # Perform cleanup before removing
+        entry.cleanup()
+        memory.remove_entry(self.id)
+        return CommandResult.success()