Added edges.py

core/edges.py

@@ -0,0 +1,10 @@
+from core.state import State
+from typing import Literal
+from langgraph.graph import END
+
+
+def file_condition(state: State) -> Literal["assistant", END]:
+    has_attachment = state.get("attachment", "")
+    if has_attachment == "true":
+        return END
+    return "assistant"