llms.txt: The File That Decides Whether AI Can Find Your Site

I spent two weeks optimizing my site's SEO. Meta tags, structured data, Open Graph images -- the whole ritual. Then I asked ChatGPT about my own blog and got silence. Not wrong information. Not outdated information. Nothing . My site was invisible to AI. Turns out, I'd been decorating a house with no front door. The problem: AI can't read your site the way Google does Google's crawler is a patient librarian. It reads your sitemap, follows every link, indexes every page, and comes back next week