User blog comment:Testitemqlstudop/Array notation variants/@comment-35470197-20191021131405/@comment-44130370-20191022001308

I guess there are several inconsistencies in my rules, but I think the examples in the bottom explain well enough.

Basically, the Feed rule is like the Catastrophic rule in BEAF. The first element is decreased by one and all other elements are replaced with the resulting array itself.