Why this dimension exists
A cheap and optional signal. Google has stated it does not use llms.txt in Search, and crawler support is inconsistent.
Why it carries 5%
Deliberately low. Most tools in this category weight llms.txt heavily and imply it is a ranking factor; the evidence does not support that, so neither does this score.
The rules it is scored by
Each rule is a single question the scanner asks about a page. Passing one adds its share of this dimension; failing it takes that share away. Every rule links to what it looks for and what evidence passes it.
- /llms.txt returns more than 20 bytes and contains an H1, a > summary line and at least 3 markdown links. Missing any of those is a partial pass.3.3%
- robots.txt is readable, so a crawler policy is published.0.8%
- The document head contains a <link> with rel="alternate" and type="text/markdown", in either attribute order.0.8%
What this dimension cannot tell you
A single-URL scan reads one page. It cannot see the rest of the site, it cannot see how a model behaves over time, and it cannot see whether the page is actually cited for the queries that matter. Those are the parts of the picture a score of this kind is blind to, and they are listed in full on the methodology page rather than implied here.