LangChain

pip install requests

import requests
import time
from langchain.tools import BaseTool
from typing import Optional

class HumanApprovalTool(BaseTool):
    name = "human_approval"
    description = "Request human approval before performing sensitive actions. Use this when the action could have significant consequences."

    api_key: str
    api_base: str = "https://api.ottr.run"

    def _run(self, action_description: str) -> str:
        # Create approval request
        response = requests.post(
            f"{self.api_base}/v1/approvals",
            headers={
                "Authorization": f"Bearer {self.api_key}",
                "Content-Type": "application/json"
            },
            json={
                "key_path": f"agent/action/{int(time.time())}",
                "value": "approved",
                "ttl_seconds": 600,
                "info": action_description,
                "actions": [
                    {"key": "approve", "value": "approved", "label": "Approve", "style": "primary"},
                    {"key": "reject", "value": "rejected", "label": "Reject", "style": "danger"}
                ]
            }
        )

        data = response.json()
        approval_url = data["url"]
        key_path = f"agent/action/{int(time.time())}"

        print(f"Approval required: {approval_url}")

        # Poll for approval
        while True:
            result = requests.get(
                f"{self.api_base}/v1/key/{key_path}",
                headers={"Authorization": f"Bearer {self.api_key}"}
            )
            value = result.text.strip('"')

            if value == "approved":
                return "Action approved by human. Proceed."
            elif value == "rejected":
                return "Action rejected by human. Do not proceed."

            time.sleep(5)

from langchain.agents import initialize_agent, AgentType
from langchain.chat_models import ChatOpenAI

# Initialize the tool
approval_tool = HumanApprovalTool(
    api_key="otw_your_api_key_here"
)

# Create agent with the approval tool
llm = ChatOpenAI(temperature=0)
agent = initialize_agent(
    tools=[approval_tool, ...other_tools],
    llm=llm,
    agent=AgentType.STRUCTURED_CHAT_ZERO_SHOT_REACT_DESCRIPTION,
    verbose=True
)

# The agent will now request approval for sensitive actions
agent.run("Delete all inactive user accounts from the database")