New user blanking articles

!("confirmed" in user_groups) &
page_namespace == 0 &
(
new_size < 50 & old_size > 300 |
new_size/(old_size + 1) < 0.1
) &
!(lcase(new_wikitext) rlike "#\s*redirect|{{(?:db-(?:attack|g10)|wi|wiktionary\s*redirect)\s*[|}]") &
!(summary irlike "^(?:revert|rv|undid)")

The issue provides only a proposed condition for detecting new users blanking articles and names no file, test, or entry point. Start by locating where rules are defined and validated, then check how similar conditions are represented. Done means the condition is accepted by the project and its behavior for the described edits is verified.

Written by the indexing model from the issue text.