┌──────────────────────────────────────────┐
│                 AI AGENT                  │
│                                           │
│  ┌─────────┐  ┌──────────┐  ┌─────────┐ │
│  │  Memory  │  │  Planner │  │ Executor│ │
│  │  (RAG)   │  │  (LLM)   │  │ (Tools) │ │
│  └────┬─────┘  └────┬─────┘  └────┬────┘ │
│       │             │             │       │
│       └─────────────┼─────────────┘       │
│                     │                     │
│              ┌──────┴──────┐              │
│              │ Observation │              │
│              │    Loop     │              │
│              └─────────────┘              │
└──────────────────────────────────────────┘

python
from langgraph.graph import StateGraph, MessagesState
from langchain_openai import ChatOpenAI
from langchain_core.tools import tool

@tool
def search_web(query: str) -> str:
    """Search the web for current information."""
    # Implementation here
    return f"Results for: {query}"

@tool
def run_code(code: str) -> str:
    """Execute Python code in a sandbox."""
    # Implementation here
    return "Code output"

# Create the agent
llm = ChatOpenAI(model="gpt-4o").bind_tools([search_web, run_code])

def agent_node(state: MessagesState):
    response = llm.invoke(state["messages"])
    return {"messages": [response]}

def tool_node(state: MessagesState):
    # Execute tool calls
    ...

# Build the graph
graph = StateGraph(MessagesState)
graph.add_node("agent", agent_node)
graph.add_node("tools", tool_node)
graph.add_edge("agent", "tools")
graph.add_edge("tools", "agent")

agent = graph.compile()

python
# Supervisor agent delegates to specialists
agents = {
    "researcher": ResearchAgent(),    # Searches and gathers info
    "coder": CodingAgent(),          # Writes and tests code
    "reviewer": ReviewAgent(),        # Reviews quality
    "deployer": DeploymentAgent(),   # Deploys to production
}

supervisor = SupervisorAgent(
    agents=agents,
    planning_model="o3",
    execution_model="gpt-4o-mini"
)

result = supervisor.execute(
    "Build a REST API for user management with tests"
)