Slack HITL: Simple Confirmation

Minimal example: agent with one tool that requires confirmation.

Minimal example: agent with one tool that requires confirmation. Use this to verify the HITL card appears in Slack.

hitl_simple.py

"""
Slack HITL — Simple Confirmation
================================

Minimal example: agent with one tool that requires confirmation.
Use this to verify the HITL card appears in Slack.

Try in Slack:
  @bot get me the top 3 hacker news stories
"""

import json

import httpx
from agno.agent import Agent
from agno.db.sqlite import SqliteDb
from agno.models.openai import OpenAIResponses
from agno.os import AgentOS
from agno.os.interfaces.slack import Slack
from agno.tools import tool


@tool(requires_confirmation=True)
def get_top_hackernews_stories(num_stories: int) -> str:
    """Fetch top stories from Hacker News.

    Args:
        num_stories: Number of stories to retrieve

    Returns:
        JSON string containing story details
    """
    response = httpx.get("https://hacker-news.firebaseio.com/v0/topstories.json")
    story_ids = response.json()

    all_stories = []
    for story_id in story_ids[:num_stories]:
        story_response = httpx.get(
            f"https://hacker-news.firebaseio.com/v0/item/{story_id}.json"
        )
        story = story_response.json()
        story.pop("text", None)
        all_stories.append(story)
    return json.dumps(all_stories)


db = SqliteDb(
    db_file="tmp/hitl_simple.db",
    session_table="agent_sessions",
    approvals_table="approvals",
)

agent = Agent(
    name="HN Agent",
    id="hn-agent",
    model=OpenAIResponses(id="gpt-5.4"),
    tools=[get_top_hackernews_stories],
    markdown=True,
    db=db,
)

agent_os = AgentOS(
    description="Slack HITL — simple confirmation test",
    agents=[agent],
    db=db,
    interfaces=[
        Slack(
            agent=agent,
            reply_to_mentions_only=True,
        ),
    ],
)
app = agent_os.get_app()


if __name__ == "__main__":
    agent_os.serve(app="hitl_simple:app", reload=True, port=7777)

Run the Example

1. Set up your virtual environment

   Mac

   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,slack]" openai
   
3. Export environment variables

   Mac/Linux

   export OPENAI_API_KEY="your_openai_api_key_here"
   export SLACK_SIGNING_SECRET="your_slack_signing_secret_here"
   export SLACK_TOKEN="your_slack_token_here"
   

   $Env:OPENAI_API_KEY="your_openai_api_key_here"
   $Env:SLACK_SIGNING_SECRET="your_slack_signing_secret_here"
   $Env:SLACK_TOKEN="your_slack_token_here"
   
4. Run the example

   Save the code above as hitl_simple.py, then run:

   python hitl_simple.py
   

Full source: cookbook/05_agent_os/interfaces/slack/hitl_simple.py