CodeQL supports Ruby but not

If is based on CodeQL, why does it support all languages from CodeQL but Ruby?

Or the LGTM documentation is outdated.

There are Ruby projects available on; LGTM . However, Ruby analysis is still beta.

Thanks for dropping by, @noraj! Just to add to @aibaars’s answer here: Ruby analysis is indeed in beta and therefore only available on GitHub code scanning for our beta testers to try out. Have you considered using GitHub code scanning to analyse your codebase? It’s based on the same CodeQL engine, and generally our latest and greatest features first appear there!