We've had discussions recently on automating ruleset work, including using a tool to find subdomains, for example see #4279 and #6912 .

One tool we've discussed is https://github.com/aboul3la/Sublist3r . I recently submitted, and the Sublist3r author @aboul3la merged, a pull request to make Sublist3r produce subdomains in the sort order that we prefer. @aboul3la likes HTTPS Everywhere.

My question here is whether we want to officially recommend Sublist3r in our documentation, pull requests, and issues for contributors to find new subdomains. "Officially recommend" is the difference between "One tool you might try using is Sublist3r" and "We recommend Sublist3r".

I don't mean to suggest that we require contributors to use Sublist3r.

Thoughts? Pinging @fuglede @Hainish @J0WI but anyone should feel free to comment.