Graph

Multi-agent workflows with conditional routing.

Constructor

Graph()

No parameters. Configure with methods.

Methods

add_node

def add_node(name: str, node: Agent | Callable[[dict], dict]) -> None

Add a node to the graph.

Parameter	Type	Description
name	str	Node identifier
node	Agent or Callable	Agent or function (state) -> state

add_edge

def add_edge(from_node: str, to_node: str) -> None

Add a direct edge between nodes.

add_conditional_edge

def add_conditional_edge(from_node: str, condition: Callable[[dict], str]) -> None

Add conditional routing. condition(state) returns next node name or END.

set_entry

def set_entry(name: str) -> None

Set the entry point node.

run

async def run(prompt: str, state: dict | None = None) -> dict

Execute the graph. Returns final state.

Parameter	Type	Description
prompt	str	Initial prompt (becomes state["input"])
state	dict	Optional initial state

Returns: Final state dict with input, output, and node outputs.

run_sync

def run_sync(prompt: str, state: dict | None = None) -> dict

Synchronous version of run().

Constants

END

from pure_agents import END

Use as return value from conditional edges to terminate the graph.

State

State is a dict that flows through nodes:

{
    "input": "original prompt",
    "output": "current output",
    "node_name": "output from that node",
}

Example

from pure_agents import Agent, Graph, END

researcher = Agent(system_prompt="Research the topic.")
writer = Agent(system_prompt="Write a summary.")

graph = Graph()
graph.add_node("research", researcher)
graph.add_node("write", writer)
graph.add_edge("research", "write")
graph.set_entry("research")

result = await graph.run("AI trends")
print(result["output"])

Conditional example

def should_continue(state: dict) -> str:
    if "done" in state.get("output", "").lower():
        return END
    return "process"

graph.add_conditional_edge("check", should_continue)