The usefulness of using static code analysis (strict type systems, linting) versus not using static code analysis is out of the question. Specifically JavaScript which does not have a strict type system benefits greatly from using static code analysis.
But the author claims that you can catch runtime bugs by letting the LLM create custom lint rules, which is hyperbole at least and wrong at most and giving developers a false sense of security at worst.
> But the author claims that you can catch runtime bugs
I think you misinterpreted OP:
Every time you find a runtime bug, ask the LLM if a static lint rule could be turned on to prevent it
Key word is prevent.