SEO Regression Validator

Use this skill after technical SEO/schema guidance exists, before claiming a site or skill output is done.

Read references/regression-checklist.md before running a broad audit.

Owns

• live HTML and local fixture checks;
• pass/fail severity model;
• timestamped evidence reports;
• schema/head metadata checks;
• public artifact reachability checks;
• regression report templates;
• negative tests for missing JSON-LD, duplicate canonical, missing image, and fake reports.

Does Not Own