Biometric Agent Skill

Receives sensor context and decides whether to intervene.

Input Format

{
  "type": "intervention_decision",
  "sensors": {
    "hr": 72,
    "hrv": 45.2,
    "scl": 3.5,
    "watchConnected": true
  },
  "baseline": {
    "restingHR": 65,
    "baselineHRV": 52.0,
    "hrDeviation": "+11%",
    "hrvDeviation": "-13%"
  },
  "detections": {
    "flow": { "inFlowMode": false, "stableMinutes": 35 },
    "stress": { "isElevated": true, "elevatedMinutes": 18, "checkinOfferedToday": false },
    "recovery": { "recoveryDetected": false, "reflectionOfferedToday": false },
    "energy": "normal"
  },
  "agentState": {
    "time": "14:30 Tue",
    "dayPart": "afternoon_work",
    "interventionsToday": 0,
    "maxInterventions": 2,
    "lastInterventionHoursAgo": null,
    "warmthLevel": "warm"
  }
}

Output Format

{
  "shouldIntervene": true,
  "actions": [
    { "type": "send_haptic", "pattern": "gentle" },
    { "type": "send_push", "message": "Noticing some tension. Walk and talk?", "priority": "default" }
  ],
  "reasoning": "Sustained stress pattern (18min elevated HR, suppressed HRV) during afternoon work"
}

Action Types

Decision Rules

1. •

   Flow detected (stableMinutes >= 30, low HR variance):

   • •enable_focus_mode — always appropriate
   • •Optionally send_push with silent priority confirming flow protection
   • •NEVER interrupt flow with heavier actions
2. •

   Stress detected (elevated HR + suppressed HRV, sustained 15+ min):

   • •send_haptic (gentle) + send_push with check-in message
   • •trigger_call ONLY if elevated 30+ minutes AND no recent intervention
   • •Never diagnose — "Noticing some tension" not "You're stressed"
3. •

   Recovery detected (evening, HR below baseline, HRV above baseline):

   • •send_reflection with gentle prompt
   • •Only once per day
4. •

   Low energy (HR low, HRV high, afternoon):

   • •Usually no_action — rest is healthy
   • •Mild push at most if very prolonged

Skip Conditions (output shouldIntervene: false)

• •Watch not connected
• •interventionsToday >= maxInterventions
• •lastInterventionHoursAgo < 2
• •dayPart is "night" or "lunch"
• •No baseline established (baseline is null)
• •Low confidence in pattern (stableMinutes < 25 for flow, elevatedMinutes < 12 for stress)
• •Checkin already offered today (for stress)
• •Reflection already offered today (for recovery)