metehan.ai Research & SOPs
AI Search Optimization Research, Tools & Methodologies
Metehan Yesilyurt reverse-engineers AI search engines for a living. This documentation site collects his published research, actionable methodologies, and open-source tools into a structured reference you can actually use. Every article here comes from hands-on experimentation -- decompiling Android apps, inspecting DevTools network tabs, analyzing Common Crawl data, and running controlled citation tests across ChatGPT, Perplexity, Google AI Mode, and Gemini.
If you work in SEO, AEO, or content strategy and want to understand how AI search engines actually decide what to cite, this is where you start.
What You'll Find Here
Research
12 deep-dive articles on AI search engine internals -- from how ChatGPT picks citations to how Google AI Mode ranks content through a 7-signal pipeline.
Methodologies
Actionable frameworks you can apply today. CiteMET for citation optimization. The RRF Playbook for topic cluster strategy. Temperature Zero for brand auditing.
Tools
68+ free SEO and AEO tools built by Metehan. WebGraph explorer, token density calculator, crawl budget analyzer, and more.
Experiments
Real-world AI crawling and citation tests with documented methodology, raw data, and reproducible steps.
Workflows
End-to-end optimization pipelines. From keyword research through content creation to citation monitoring -- complete playbooks.
Quick Reference
Parameter tables, crawler user-agent strings, platform comparison charts, and lookup tables for daily use.
How to Use This Site
- Starting out with AEO? Read the RRF & AI Citations article first. It explains the math behind why topic clusters win in AI search.
- Already optimizing for AI search? Jump to Google AI Mode Architecture or ChatGPT Search Configuration for platform-specific intelligence.
- Need a tool? Check the Tools section -- everything is free and open-source.
- Want the big picture? The Research index lists every article with a one-line summary so you can find what matters to your situation fast.
About Metehan Yesilyurt
SEO, AI/ML & Growth | Ankara, Turkey
Metehan Yesilyurt (@metehan777) is an AI Search & SEO Researcher trusted by 100+ brands and startups worldwide. With 10+ years in SEO, AI, and digital product innovation, he spends his time reverse-engineering how AI search engines like ChatGPT, Perplexity, Google AI Mode, and Gemini discover, rank, and cite web content.
His research has been cited by Semrush, Ahrefs, Search Engine Land, HubSpot, and adopted by enterprise SEO/AEO/GEO teams globally. He speaks at conferences including BrightonSEO and FePSeM Paris.
Expertise: AI Search Engines, LLM Visibility (AEO/GEO), Google Discover, Screaming Frog, MCP Servers, Tokenizer Research, Query Fan-Out, Technical SEO, Common Crawl/CC Rank
| Platform | Link |
|---|---|
| Website | metehan.ai |
| X/Twitter | @metehan777 |
| GitHub | metehan777 |
| The Lab (Members) | lab.metehan.ai |