/harvest-monitor

name: harvest-monitor
description: Web change monitoring - track changes on pages, detect updates, changelog diffs
allowed-tools: [Bash, Read, Write, WebFetch, Grep]
keywords: [monitor, watch, changes, diff, changelog, update, track, compare]

Harvest Monitor

Track changes on web pages over time. Compare current content against cached versions to detect updates, new releases, breaking changes, and documentation modifications.

Usage

# Monitor a page for changes
/harvest-monitor https://docs.example.com/changelog

# Compare against last cached version
/harvest-monitor https://docs.example.com/api --diff

# Track multiple pages
/harvest-monitor --watchlist ~/.claude/cache/agents/harvest/watchlist.json

How It Works

1. Fetch current page content 2. Check cache for previous version 3. Compute diff (content-level, not HTML-level) 4. Categorize changes (added, removed, modified) 5. Report significant changes 6. Update cache with current version

Output

# Change Report: [URL]
> Checked: [timestamp]
> Previous: [cached timestamp]
> Status: CHANGED / NO CHANGE

## Changes Detected
### Added
- [New content]

### Modified
- [Changed content - before → after]

### Removed
- [Removed content]

## Impact Assessment
[What these changes mean for our project]

Watchlist Format

{
  "pages": [
    {
      "url": "https://docs.example.com/changelog",
      "frequency": "daily",
      "notify": ["migrator", "shipper"]
    }
  ]
}

Integration

• **migrator**: Track dependency changelogs for breaking changes
• **shipper**: Monitor deployment status pages
• **tech-radar**: Track technology evolution

Rules

• Cache previous versions locally
• Content-level diff, not HTML diff
• Ignore style/layout changes
• Only report meaningful content changes
• Max 1 check per hour per URL