Captures SEO snapshots and diffs them like Git commits. Run a baseline before deployment, compare after, and see exactly what changed: title tags, meta descriptions, schema markup, canonicals, heading structure, even Core Web Vitals. It stores everything in local SQLite and applies 17 comparison rules across three severity levels (critical, warning, info). Honest take: this fills a real gap. Most SEO tools either monitor rankings or crawl periodically, but nothing version-controls your on-page elements the way this does. If you've ever had traffic tank after a deploy and spent hours diffing HTML in browser devtools, you'll appreciate having structured before/after comparisons stored locally.
npx skills add https://github.com/agricidaniel/claude-seo --skill seo-drift