feat: add langgraph.json for langgraph studio debug

src/graph/builder.py

@@ -3,6 +3,7 @@
 
 from langgraph.graph import StateGraph, START, END
 from langgraph.checkpoint.memory import MemorySaver
+
 from .types import State
 from .nodes import (
     coordinator_node,
@@ -15,13 +16,8 @@ from .nodes import (
 )
 
 
-def build_graph():
-    """Build and return the agent workflow graph."""
-    # use persistent memory to save conversation history
-    # TODO: be compatible with SQLite / PostgreSQL
-    memory = MemorySaver()
-
-    # build state graph
+def _build_base_graph():
+    """Build and return the base state graph with all nodes and edges."""
     builder = StateGraph(State)
     builder.add_edge(START, "coordinator")
     builder.add_node("coordinator", coordinator_node)
@@ -32,4 +28,25 @@ def build_graph():
     builder.add_node("coder", coder_node)
     builder.add_node("human_feedback", human_feedback_node)
     builder.add_edge("reporter", END)
+    return builder
+
+
+def build_graph_with_memory():
+    """Build and return the agent workflow graph with memory."""
+    # use persistent memory to save conversation history
+    # TODO: be compatible with SQLite / PostgreSQL
+    memory = MemorySaver()
+
+    # build state graph
+    builder = _build_base_graph()
     return builder.compile(checkpointer=memory)
+
+
+def build_graph():
+    """Build and return the agent workflow graph without memory."""
+    # build state graph
+    builder = _build_base_graph()
+    return builder.compile()
+
+
+graph = build_graph()