Sentinel

Sentinel turns a Moodle site into a data source for a central fleet-monitoring dashboard. It collects operational facts — core version and branch support, PHP / OS / database / web-server environment, plugin inventory and available updates, cron and task health, disk, sessions, authentication signals, core check-API results, recent configuration changes and drift from defaults, and optionally core file integrity against a pristine manifest — and exposes them as one versioned JSON snapshot.

• Pull: a dedicated web service behind a scoped role and token; the dashboard polls at its own cadence, with a cheap liveness probe.
• Push: an optional scheduled task POSTs the snapshot to an endpoint you configure, authenticated by a shared secret. HTTPS only, peer-verified.
• Local overview: a Site administration report page summarises the same facts for admins, with or without a dashboard.
• Egress control: exclude whole slices or individual fields from what leaves the site; the snapshot declares what was withheld.
• Thin agent by design: the plugin reports raw facts. It never sends notifications, stores history, or fetches external data on its own.

Works with any dashboard that understands the documented snapshot schema, including the Sentinel Monitoring Service and self-hosted deployments.