We have been using Claude SEO for audits for about a month. An open-source plugin for Claude Code, MIT-licensed, with 25 sub-skills that fan out in parallel across technical checks, schema, content quality, and AI search. A full site audit finishes in roughly 15 minutes.
The part I actually care about is the falsifiability check attached to every recommendation. It states what would have to happen for the recommendation to be wrong, plus a leading indicator to watch. Small thing. It completely changes the client call because you stop saying "trust me" and start saying, "Here is how we will know in three weeks."
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It is not magic. Without Google API credentials, your Core Web Vitals are lab estimates and not field data, so I wire up Search Console and CrUX before the first run. Pages that hydrate on scroll or after a click still produce noisy findings. It does not replace a real crawler on a 50k URL site either. I run both.
If you deliver audits to clients, install it and point it at your own site first. That is what I did. Every audit I ship at SmartMetrics starts here, with a person reading each finding before it goes to the client.
Link: https://github.com/AgriciDaniel/claude-seo
Gray Digital Group
Blitzy
PermitFlow
Dj Haer Jr
