QUESTION: How to match dot files and dot directories

[bpj]

I'm having trouble formulating a rule which includes/excludes "dot files" and "dot directories" without false positives. I've tried with

$rule->new->not( sub { m{ (?: \A | / ) \. (?! \z | [/.\s] ) }x });

but it seems not to be entirely successful. Note that I need to formulate it so that various names ot downloaded files and files obtained from clients with non-ASCII characters, whitespace and dots in funny places don't get matched. I wondered if there was a pre-defined rule for this so I grepped the documentation for "dot" and "hidden" but came up empty-handed. I guess that the lack of such a predefined rule may be an indication that this is a known difficulty.

Also it seems that when I use skip_vcs together with the above .git paths do slip through, which is very weird!