API health sentinel

# A zero-LLM status watcher: polls a Statuspage-style JSON endpoint and alerts
# only when the status indicator CHANGES (up→down and down→up both alert).
blueprint:
  id: api-health-sentinel
  title: API health sentinel
  description: >-
    Polls a status endpoint and alerts only when the status changes — you hear
    about the outage once, and you hear when it recovers. No LLM, free to run.
    Ships watching Anthropic's status page; point it at any Statuspage JSON.
config:
  synth:
    name: Health sentinel
    goal: Alert me when the service's status changes, in either direction.
    schedule_seconds: 300
  requires_credentials:
    - WEBHOOK_URL
  sources:
    - id: status
      primitive: http_fetch
      config:
        url: https://status.anthropic.com/api/v2/status.json
        json: true
  fast_path:
    primitive: fast_path_diff
    inputs:
      current: $sources.status.json.status.indicator
      previous: $state.last_indicator
  actions:
    - if: $fast_path.triggered
      primitive: notify_webhook
      config:
        url: $secrets.WEBHOOK_URL
        body:
          alert: Service status changed
          now: $sources.status.json.status.description
          change: $fast_path.diff
    - always: true
      primitive: write_state
      config:
        last_indicator: $sources.status.json.status.indicator
        checked_at: $tick.started_at