Temporal Coupling: The Achilles' Heel of Autonomous Agents

10:00 AM: Agent reads calendar, sees 2 PM free
10:05 AM: User books meeting at 2 PM (external change)
10:10 AM: Agent schedules ANOTHER meeting at 2 PM
Result: Double-booking, angry users

while task_not_done:
    current_state = poll_calendar()  # Every 10 seconds
    agent.update_context(current_state)
    agent.execute_next_step()

curl -X POST https://api.parallel.ai/v1alpha/monitors \
  -d '{
    "query": "Has the 2 PM time slot on Dec 6 been booked?",
    "cadence": "real-time",
    "webhook": {
      "url": "https://squad.ai/agent/calendar-monitor",
      "event_types": ["monitor.event.detected"]
    }
  }'

// Parallel detects: "2 PM slot now booked"
// Sends webhook to Squad agent

POST https://squad.ai/agent/calendar-monitor
{
  "change_detected": "2 PM slot now occupied",
  "timestamp": "2025-12-06T10:05:00Z",
  "details": "Conflict: Emergency meeting scheduled"
}

agent.on('monitor_event', async (event) => {
  await agent.pause();

  const new_plan = await agent.replan({
    ...original_task,
    new_constraints: event.details
  });

  // Generate temporal receipt
  receipt.add({
    type: 'temporal_adaptation',
    trigger: event,
    original_plan: 'Schedule at 2 PM',
    adapted_plan: 'Schedule at 3 PM instead',
    reason: 'Monitor detected 2 PM conflict'
  });

  await agent.resume(new_plan);
});

{
  "action": "schedule_meeting",
  "timestamp": "2025-12-06T10:00:00Z",
  "verification_proof": {
    "evidence": "2 PM slot was free at execution time"
  }
}

{
  "action": "schedule_meeting",
  "execution_window": {
    "start": "10:00:00Z",
    "end": "10:10:00Z"
  },
  "temporal_events": [
    {
      "timestamp": "10:05:00Z",
      "event": "2 PM slot became booked",
      "agent_response": "Detected conflict, re-planned to 3 PM",
      "adaptation_successful": true
    }
  ],
  "verification_proof": {
    "type": "temporal_continuous",
    "evidence": "Agent monitored state continuously and adapted to 1 external change"
  }
}