Methodology you can verify: 20+ neutral buying-intent questions, asked 3 times each across ChatGPT, Claude, Perplexity, Gemini and Google AI Overviews (no session, no memory), scored on mention, position, sentiment, sources and data accuracy · technical check includes robots.txt, sitemap, schema and llms.txt · a measurement card so the audit is repeatable — monthly re-measurement available as a retainer.