Why Your SaaS Needs llms.txt: A Practical Guide with Real Traffic Data

If you run a SaaS or any product with a public website, there is a small text file you should ship this week. It costs nothing, takes an hour, and - in my case - correlates with a durable jump in AI assistant traffic to the product. The file is llms.txt. This post is a practical guide: what it is, why it matters, what to put in it, and what actually happened when I shipped it on zsky.ai. What llms.txt is llms.txt is to AI assistants what robots.txt is to search crawlers and what a good landing page is to human visitors.