{
  "id": "scheduler",
  "label": "Scheduler Canonical",
  "phase": "phase-10",
  "category": "monitoring_observability",
  "status": "ACTIVE_DH_MIRROR",
  "purpose": "Govern timed, repeated and delayed operational checks inside Phase 10.",
  "function": "Execute scheduled monitoring, self-check, escalation, cleanup and incident routines with explicit cadence, ownership, evidence and failure state.",
  "overview": {
    "summary": "Scheduler Canonical owns time as an execution input. DEVON-DEV cannot depend only on manual clicks or request-time activity; monitoring and incident readiness need controlled cadence.",
    "function": "FUNCTION: Register scheduled routines with cadence, target action, owner, dependency, timeout, retry rule, last-run evidence, next-run expectation and failure classification.",
    "system_position": "Self-Monitoring uses scheduled inspection to detect drift. Notification Service can depend on timed escalation. Incident Management needs repeated state review. Scheduler turns Phase 10 from passive dashboards into active supervision.",
    "failure_impact": "A stopped scheduler creates false calm. Nothing necessarily crashes, but checks stop running, health becomes stale, escalation windows are missed and the panel keeps showing a world that has not actually been remeasured."
  },
  "failure_impact": "A stopped scheduler creates false calm. Nothing necessarily crashes, but checks stop running, health becomes stale, escalation windows are missed and the panel keeps showing a world that has not actually been remeasured.",
  "technology_requirements": [
    {
      "technology": "Scheduler Runtime",
      "required_for": "Govern timed, repeated and delayed operational checks inside Phase 10.",
      "required_by_phase": "phase-10",
      "required_by_category": "scheduler",
      "required_by_buckets": [
        "Prerequisites",
        "Installation",
        "Configuration",
        "Validation",
        "Observable Evidence",
        "Failure Modes & Recovery",
        "Completion & Promotion"
      ],
      "expected_version": "MISSING until Scheduler Runtime is implemented and validated in the future Execution & Monitoring Panel",
      "validation_command": "MISSING until scheduler can prove monitored state, evidence routing and operator-facing visibility",
      "evidence_path": "/home/yeff/public_html/devon/canon/execution/state/dh_sources/scheduler_canonical.json",
      "status_source": "Documentation Hub + future Execution & Monitoring Panel",
      "blocking_if_missing": true,
      "failure_impact": "A stopped scheduler creates false calm. Nothing necessarily crashes, but checks stop running, health becomes stale, escalation windows are missed and the panel keeps showing a world that has not actually been remeasured."
    }
  ],
  "depends_on": [
    "job_queue_task_runner",
    "monitoring_canonical",
    "execution_ledger"
  ],
  "used_by": [
    "self_monitoring",
    "incident_management",
    "notification_service"
  ]
}