Basic scheduled agent run.

1"""Basic scheduled agent run.
2
3Starts an AgentOS with the scheduler enabled. After the server is running,
4use the REST API to create a schedule that triggers an agent every 5 minutes.
5
6Prerequisites:
7    pip install kern-ai[scheduler]
8    # Start postgres: ./cookbook/scripts/run_pgvector.sh
9
10Usage:
11    python cookbook/05_agent_os/scheduler/basic_schedule.py
12
13Then, in another terminal, create a schedule:
14    curl -X POST http://localhost:7777/schedules \
15        -H "Content-Type: application/json" \
16        -d '{
17            "name": "greeting-every-5m",
18            "cron_expr": "*/5 * * * *",
19            "endpoint": "/agents/greeter/runs",
20            "payload": {"message": "Say hello!"}
21        }'
22"""
23
24from kern.agent import Agent
25from kern.db.postgres import PostgresDb
26from kern.models.openai import OpenAIChat
27from kern.os import AgentOS
28
29# ---------------------------------------------------------------------------
30# Create Example
31# ---------------------------------------------------------------------------
32
33db = PostgresDb(
34    id="scheduler-demo-db",
35    db_url="postgresql+psycopg://ai:ai@localhost:5532/ai",
36)
37
38greeter = Agent(
39    id="greeter",
40    name="Greeter Agent",
41    model=OpenAIChat(id="gpt-4o-mini"),
42    instructions=[
43        "You are a friendly greeter. Say hello and include the current time."
44    ],
45    db=db,
46    markdown=True,
47)
48
49app = AgentOS(
50    agents=[greeter],
51    db=db,
52    scheduler=True,
53    scheduler_poll_interval=15,
54).get_app()
55
56# ---------------------------------------------------------------------------
57# Run Example
58# ---------------------------------------------------------------------------
59
60if __name__ == "__main__":
61    import uvicorn
62
63    uvicorn.run(app, host="0.0.0.0", port=7777)

1# Clone and setup repo
2git clone https://github.com/kern-ai/kern.git
3cd kern/cookbook/05_agent_os/scheduler
4
5# Create and activate virtual environment
6./scripts/demo_setup.sh
7source .venvs/demo/bin/activate
8
9# Optiona: Run PgVector (needs docker)
10./cookbook/scripts/run_pgvector.sh
11
12python basic_schedule.py