Custom permissions policy

from typing import Any, Mapping
from loomflow import Agent
from loomflow.core.types import PermissionDecision, ToolCall
 
class BusinessHoursPermissions:
    """Block destructive tools outside 9am-5pm local time."""
 
    async def check(
        self,
        call: ToolCall,
        *,
        context: Mapping[str, Any],
    ) -> PermissionDecision:
        if not call.is_destructive():
            return PermissionDecision.allow_()
        from datetime import datetime
        now = datetime.now()
        if 9 <= now.hour < 17:
            return PermissionDecision.allow_()
        return PermissionDecision.deny_(
            f"destructive calls disabled outside business hours (now {now:%H:%M})"
        )
 
agent = Agent("...", permissions=BusinessHoursPermissions())