# The Cited

> Generative Engine Optimization, primary research only.

Editorial publication on Generative Engine Optimization (GEO). Primary research on how AI search engines cite, retrieve, and rank.

## About this publication

- Primary research only, with public datasets and methodology.
- Editorial independence: no sponsored content without disclosure.
- All articles updated and timestamped.
- Authors disclose affiliations.

## Cornerstone articles

- [llms.txt: Spec, 100-Domain Adoption Audit, and Setup](https://geosalience.com/technical/llms-txt-spec-adoption-setup.md): We audited 100 top developer-tools and SaaS sites for an llms.txt file. Only 37 of them serve one at the apex — and the gap is concentrated in the places you might expect it not to be. The full spec, the audit, and a 10-minute setup.
- [What is Generative Engine Optimization (GEO)?](https://geosalience.com/foundations/what-is-geo.md): An honest taxonomy of the discipline that is reshaping how the web is read — by both humans and machines.

## Foundations

> Theory, mechanics, and history of AI search. How LLMs retrieve, rank, and cite.

- [What is Generative Engine Optimization (GEO)?](https://geosalience.com/foundations/what-is-geo.md): An honest taxonomy of the discipline that is reshaping how the web is read — by both humans and machines.

## Technical

> Server-side, code-level, infra-level. llms.txt, robots, schema, structured data.

- [llms.txt: Spec, 100-Domain Adoption Audit, and Setup](https://geosalience.com/technical/llms-txt-spec-adoption-setup.md): We audited 100 top developer-tools and SaaS sites for an llms.txt file. Only 37 of them serve one at the apex — and the gap is concentrated in the places you might expect it not to be. The full spec, the audit, and a 10-minute setup.

## About

- [About The Cited](https://geosalience.com/about): publication overview.
- [Methodology](https://geosalience.com/methodology): how we test and report.
- [Editorial policy](https://geosalience.com/editorial-policy): disclosure and corrections.

## Optional

- [Full-text bundle (cornerstones only)](https://geosalience.com/llms-full.txt)
- [RSS feed](https://geosalience.com/feed.xml)
- [Sitemap](https://geosalience.com/sitemap.xml)

## Contact

- Web: https://geosalience.com
- Email: hello@geosalience.com
- Twitter: @geosalience