`llms.txt` is a new emerging standard that got introduced in 2024 and helps AI tools like ChatGPT, Cursor, Copilot, and Claude find the most useful, structured parts of your documentation—typically in Markdown format. It works like `robots.txt` but for large language models (LLMs), pointing them to clean, token-efficient content they can parse quickly and accurately. By guiding AI tools away from bloated HTML and toward concise, developer-ready docs, `llms.txt` improves the quality of code completions, reduces hallucinations, and increases productivity. More importantly, it also increases the visibility of your content in AI-powered developer environments, making it more likely your docs show up in tools like ChatGPT or Copilot. In a world where AI is the new search engine, `llms.txt` helps your site rank higher—inside the tools developers actually use.