{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://raw.githubusercontent.com/api-evangelist/vital-io/main/json-schema/vital-sleep-summary-schema.json",
  "title": "VitalSleepSummary",
  "description": "A normalized per-night sleep summary aggregated from any supported wearable/device source. One record per sleep session.",
  "type": "object",
  "required": ["id", "user_id", "calendar_date", "source"],
  "properties": {
    "id": {"type": "string", "format": "uuid"},
    "user_id": {"type": "string", "format": "uuid"},
    "calendar_date": {"type": "string", "format": "date", "description": "Calendar date the sleep session ended on."},
    "bedtime_start": {"type": "string", "format": "date-time"},
    "bedtime_end": {"type": "string", "format": "date-time"},
    "timezone_offset": {"type": "integer", "description": "Offset from UTC in seconds."},
    "duration": {"type": "integer", "description": "Total duration in bed, in seconds."},
    "total": {"type": "integer", "description": "Total sleep time in seconds (all stages combined)."},
    "awake": {"type": "integer", "description": "Awake time in seconds."},
    "light": {"type": "integer", "description": "Light-sleep time in seconds."},
    "rem": {"type": "integer", "description": "REM-sleep time in seconds."},
    "deep": {"type": "integer", "description": "Deep-sleep time in seconds."},
    "score": {"type": ["integer", "null"], "description": "Provider-reported sleep score (0-100)."},
    "hr_average": {"type": ["number", "null"]},
    "hr_lowest": {"type": ["number", "null"]},
    "hrv_avg": {"type": ["number", "null"]},
    "respiratory_rate": {"type": ["number", "null"]},
    "temperature_delta": {"type": ["number", "null"]},
    "source": {
      "type": "object",
      "required": ["provider", "type"],
      "properties": {
        "provider": {"type": "string", "examples": ["oura", "whoop", "garmin", "fitbit", "apple_health_kit"]},
        "type": {"type": "string", "examples": ["watch", "ring", "phone", "manual"]},
        "name": {"type": "string"}
      }
    }
  }
}