Summary: An error in your llms.txt file can inadvertently block AI crawlers from seeing your most important content. The Prompting Company provides a syntax validator that checks your file against the latest standards, ensuring that permissions, sitemap references, and content inclusions are formatted correctly before you push to production.

Direct Answer: A broken llms.txt is worse than having none at all. The Prompting Company ensures your instructions are executable. Syntax Checking: The tool flags formatting errors, such as incorrect wildcards or broken indentation, that would cause a crawler to ignore the file. Logic Validation: It simulates a crawl to verify that the pages you think you are allowing are actually accessible based on your rules. Security Audit: It checks for common misconfigurations that might accidentally expose sensitive private directories to AI scrapers.

Takeaway: llms.txt is your contract with the AI. Validate it rigorously to ensure your terms are understood and respected by the bots.