implement clear memory

lang_agent/base.py

@@ -6,13 +6,15 @@ from PIL import Image
 from io import BytesIO
 import matplotlib.pyplot as plt
 from loguru import logger
-from lang_agent.utils import tree_leaves
 
 from langgraph.graph.state import CompiledStateGraph
+from langgraph.checkpoint.memory import MemorySaver
+
 from langchain_core.messages import BaseMessage, HumanMessage, SystemMessage
 from langchain_core.messages.base import BaseMessageChunk
 
 from lang_agent.components.text_releaser import TextReleaser, AsyncTextReleaser
+from lang_agent.utils import tree_leaves
 
 if TYPE_CHECKING:
     from lang_agent.graphs.graph_states import State
@@ -174,6 +176,21 @@ class GraphBase(ABC):
         else:
             return img
         
+    def clear_memory(self):
+        # Clear the agent's (LangChain) memory if available
+        if hasattr(self, "memory") and self.memory is not None:
+            if isinstance(self.memory, MemorySaver):
+                for thread_id in self.memory.storage:
+                    self.memory.delete_thread(thread_id)
+    
+    async def aclear_memory(self):
+        # Clear the agent's (LangChain) memory if available (async version)
+        if hasattr(self, "memory") and self.memory is not None:
+            if isinstance(self.memory, MemorySaver):
+                for thread_id in self.memory.storage:
+                    await self.memory.adelete_thread(thread_id)
+            
+
 
 class ToolNodeBase(GraphBase):
     @abstractmethod