It really need some zero-shot or few-shot magic from LLMs, or even heuristics to detect common patterns like emails, and just generate a sane regex, rather than

It really need some zero-shot or few-shot magic from LLMs, or even heuristics to detect common patterns like emails, and just generate a sane regex, rather than stuff like [A-Za-z]{2,}@libertylabs\.ai which will obviously fail with a few more examples.