monitor

Monitor — Resident Change Detection

Use this skill to watch an HTTP/HTTPS page across time. Crawlio creates a background tab, captures a compact ARIA baseline, and schedules recaptures with chrome.alarms. Collection lives in the extension: an MCP disconnect or server restart does not erase the baseline or skip scheduled work.

Start

Call the default-mode observe tool:

{
  "action": "monitor_start",
  "url": "https://target.example/page",
  "label": "pricing page",
  "intervalMinutes": 5
}

Retain the returned monitorId. The response includes the initial baseline. Chrome alarms have a 30-second minimum and can run late under browser load; do not promise wall-clock precision.

Query

Status does not touch the page:

{ "action": "monitor_status", "monitorId": "mon_..." }

Read recent diffs without returning the full snapshots:

{
  "action": "monitor_results",
  "monitorId": "mon_...",
  "limit": 10,
  "includeSnapshot": false
}

Each result carries changed, additions, removals, unchanged, and diff. Cite changed diff lines as evidence; there is no sample field. If technology or performance evidence is required, use execute after a change is detected and call smart.detectTechnologies() or smart.extractPage() explicitly. The resident monitor itself claims structural/content change only.

Stop or Delete

Stop future captures but retain history:

{ "action": "monitor_stop", "monitorId": "mon_...", "closeTab": true }

Delete a monitor and its retained snapshots:

{ "action": "monitor_clear", "monitorId": "mon_...", "closeTab": true }

Use monitor_status and monitor_results to inspect retained work, monitor_stop to end future captures, and monitor_clear to delete a monitor and its snapshots. The extension popup is status-only and does not manage resident work. Storage is bounded to 25 MiB with oldest completed runs/snapshots evicted first; no unlimitedStorage or new Chrome permission is used. Compact ARIA snapshots intentionally retain visible page text in local extension storage, so monitor only pages whose displayed content the user agrees to retain; the snapshots are not sent to Crawlio by this lifecycle.