basic ephemeral history

agent/history.py

@@ -0,0 +1,13 @@
+# agent/history.py
+class ConversationHistory:
+    def __init__(self):
+        self.messages: list[dict] = []
+
+    def add_message(self, role: str, content: str):
+        self.messages.append({"role": role, "content": content})
+
+    def get_all(self) -> list[dict]:
+        return self.messages
+
+    def clear(self):
+        self.messages = []