Monitor Page

When to Use

Activate when the user asks to monitor a page for changes, watch for price drops, track stock availability, detect new content, or be alerted when something changes on a website.

Steps

1. Clarify what to monitor. Ask the user:

   • What URL to watch
   • What specific content to track (price, stock status, text, any change)
   • How to identify the target content (a specific section, element, or keyword)

2. Capture the baseline. Navigate to the page and extract the current state:

   • Use

     navigate_page

     to load the target URL
   • Use

     get_page_content

     or

     evaluate_script

     to extract the specific content to track
   • Save the baseline to memory using

     memory_write

     with a descriptive key like

     monitor:{url-slug}:baseline

3. Check for changes. On subsequent checks:

   • Navigate to the same URL
   • Extract the same content using the same method
   • Compare against the saved baseline
   • Report differences

4. Report findings:

If changes detected:

## Page Change Detected

**URL:** [url]
**Checked:** [current date/time]

### Changes
- **Before:** [previous value]
- **After:** [current value]

If no changes:

No changes detected on [URL].
Last checked: [current date/time]
Monitoring: [what you're tracking]

5. Update the baseline after reporting changes, using

   memory_write

   to store the new state.

Tips

• For price monitoring, extract just the price element rather than the full page to avoid false positives from ad changes.
• Use

  evaluate_script

  with specific CSS selectors for precise element tracking.
• Suggest the user set a reminder to ask you to check again — BrowserOS doesn't yet have scheduled tasks.
• For stock availability, look for phrases like "In Stock", "Out of Stock", or "Add to Cart" button presence.