If it's too big a hurdle to read the manual you'll never manage to use it for its purpose. Is this a threat to you somehow? In what way?
Do you have the same opinion about ripgrep?
$ rg 'function('
regex parse error:
function(
^
error: unclosed groupAnd that’s what people say BeeBase should do here too.
Something like:
Error: invalid name: must start with uppercase letter
Not some obtuse message that you have to go look up in a manual for no reason
Like knowledge of the regex language, or having spent ten minutes skimming through the tutorial part of a PDF manual.
In my experience, how to use a manual is a technique more widely understood than regex. Maybe this impression is wrong, I'd welcome something tangible pointing in another direction if it is.
It worsens the UX for no reason.
As a sibling comment said, the program already knows why the name was invalid. It would have cost nothing to surface the reason when reporting the error.