custom_lifespan.py
"""
Example AgentOS app where the agent has a custom lifespan.
"""
from contextlib import asynccontextmanager
from agno.agent import Agent
from agno.db.postgres import PostgresDb
from agno.models.anthropic import Claude
from agno.os import AgentOS
from agno.utils.log import log_info
# ---------------------------------------------------------------------------
# Create Example
# ---------------------------------------------------------------------------
# Setup the database
db = PostgresDb(db_url="postgresql+psycopg://ai:ai@localhost:5532/ai")
# Setup basic agents, teams and workflows
agno_support_agent = Agent(
id="example-agent",
name="Example Agent",
model=Claude(id="claude-sonnet-4-5"),
db=db,
markdown=True,
)
@asynccontextmanager
async def lifespan(app):
log_info("Starting My FastAPI App")
yield
log_info("Stopping My FastAPI App")
agent_os = AgentOS(
description="Example app with custom lifespan",
agents=[agno_support_agent],
lifespan=lifespan,
)
app = agent_os.get_app()
# ---------------------------------------------------------------------------
# Run Example
# ---------------------------------------------------------------------------
if __name__ == "__main__":
"""Run your AgentOS.
You can see test your AgentOS at:
http://localhost:7777/docs
"""
# Don't use reload=True here, this can cause issues with the lifespan
agent_os.serve(app="custom_lifespan:app")
Run the Example
1
Set up your virtual environment
uv venv --python 3.12
source .venv/bin/activate
uv venv --python 3.12
.venv\Scripts\activate
2
Install dependencies
uv pip install -U "agno[os]" "psycopg[binary]" anthropic
3
Export your Anthropic API key
export ANTHROPIC_API_KEY="your_anthropic_api_key_here"
$Env:ANTHROPIC_API_KEY="your_anthropic_api_key_here"
4
Run PgVector
docker run -d \
-e POSTGRES_DB=ai \
-e POSTGRES_USER=ai \
-e POSTGRES_PASSWORD=ai \
-e PGDATA=/var/lib/postgresql \
-v pgvolume:/var/lib/postgresql \
-p 5532:5432 \
--name pgvector \
agnohq/pgvector:18
docker run -d `
-e POSTGRES_DB=ai `
-e POSTGRES_USER=ai `
-e POSTGRES_PASSWORD=ai `
-e PGDATA=/var/lib/postgresql `
-v pgvolume:/var/lib/postgresql `
-p 5532:5432 `
--name pgvector `
agnohq/pgvector:18
5
Run the example
Save the code above as
custom_lifespan.py, then run:python custom_lifespan.py