LangSmith Studio

from langchain.agents import create_agent

def send_email(to: str, subject: str, body: str):
    """发送电子邮件"""
    email = {
        "to": to,
        "subject": subject,
        "body": body
    }
    # ... 电子邮件发送逻辑

    return f"Email sent to {to}"

agent = create_agent(
    "gpt-5.4",
    tools=[send_email],
    system_prompt="You are an email assistant. Always use the send_email tool.",
)

LANGSMITH_API_KEY=lsv2...

{
  "dependencies": ["."],
  "graphs": {
    "agent": "./src/agent.py:agent"
  },
  "env": ".env"
}