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from langgraph.graph import StateGraph, START, END
from langgraph.checkpoint.memory import InMemorySaver
from .state import AgentState
from .extractor import extract_parameters
from .selector import select_tool
from .validator import validate_tool
from .clarification import ask_user
from .executor import execute_tool
from .response import generate_response
def route_after_validation(state: AgentState):
if state["selected_tool"] is None:
return "no_tool"
if state["missing_params"]:
return "ask_user"
return "execute_tool"
builder = StateGraph(AgentState)
# Register nodes
builder.add_node("extract", extract_parameters)
builder.add_node("select_tool", select_tool)
builder.add_node("validate", validate_tool)
builder.add_node("ask_user", ask_user)
builder.add_node("execute_tool", execute_tool)
builder.add_node("generate_response", generate_response)
# Main flow
builder.add_edge(START, "extract")
builder.add_edge("extract", "select_tool")
builder.add_edge("select_tool", "validate")
# Conditional routing
builder.add_conditional_edges(
"validate",
route_after_validation,
{
"no_tool": END,
"ask_user": "ask_user",
"execute_tool": "execute_tool"
}
)
# Final edges
builder.add_edge("ask_user", END)
builder.add_edge("execute_tool", "generate_response")
builder.add_edge("generate_response", END)
graph = builder.compile(
checkpointer=InMemorySaver()
)
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