Rule llms-txt.invalid
Fix the structure of /llms.txt
llms-txt.invalid is a check in Crawlmind's site audit that grades high-impact issues of this kind. This page explains why the rule matters and the exact fix.
Why it matters
Your /llms.txt doesn't match the spec: usually a missing H1, missing one-line summary, or sections without bullet-link items. AI engines that consume llms.txt fall back to robots.txt + sitemap when the file is malformed, which means you publish a file but get zero benefit.
The fix
The minimal valid file:
```
# Project Name
> One-line summary of the project (becomes the AI engine's description).
## Section Name
- [Page title](https://example.com/page): one-line description
- [Page title](https://example.com/another): one-line description
## Optional
- [Less critical link](https://example.com/x): one-line description
```
Required elements: H1, one-line blockquote summary, at least one H2 section with bullet-link items. See [llmstxt.org](https://llmstxt.org) for the full spec.