“The tool found real bugs in ~2,800 failing files that existing linters missed, with AI assistants fixing most issues automatically.”
A proper HTML+ERB parser caught 2,800 bugs in a mature Rails monolith. That is the actual story. Existing linters were running the whole time and finding nothing because they treat ERB as opaque string substitution. The AI angle is filler. The real lesson is that template languages need real parsers, not regex.