EXPLAIN EXTENDED

EXPLAIN EXTENDED is a business whose own site puts it this way: "EXPLAIN EXTENDED How to create fast database queries Happy New Year: Lisp interpreter in SQL with one comment This year, I'll be implementing a Lisp interpreter in SQL." To AI engines like ChatGPT and Perplexity it is partially visible, scoring 5.9 out of 10, readable in places and missing in others.

On the page itself the strengths are clear: a clear heading structure. It is passable on some structured data, a partly stated business identity, basic crawler access and partial sitemap and link coverage. What holds it back is credibility markers like credentials or reviews.

Away from its own site, other sites link to it and people discuss it in places AI engines read. There is some, but not much, sign that the domain is only lightly established. Beyond that, AI engines do not yet recognise it as a distinct business, there is no press coverage to draw on and it does not come up on Reddit. Those are earned elsewhere on the web, not fixed on the site itself.

AI crawlers have visited 2 times in our tracking, including ClaudeBot (Anthropic). The site links to no social profiles, so there is nothing tying the brand to a wider presence.