feat: lite deep researcher implementation

src/graph/types.py

@@ -0,0 +1,16 @@
+import operator
+
+from langgraph.graph import MessagesState
+from typing import Annotated
+from src.prompts.planner_model import Plan
+
+
+class State(MessagesState):
+    """State for the agent system, extends MessagesState with next field."""
+
+    # Runtime Variables
+    observations: Annotated[list[str], operator.add] = []
+    plan_iterations: int = 0
+    last_plan: Plan = None
+    current_plan: Plan = None
+    final_report: str = ""