Anything can be easily extended by plug-ins.
Change anything.el matching algorithm humanely. It gives anything.el search refinement functionality. exact match → prefix match → multiple regexp match
A query of multiple regexp match is space-delimited string. Anything displays candidates which matches all the regexps. A regexp with “!” prefix means not matching the regexp. To include spaces to a regexp, prefix “\” before space, it is controlled by
Lisp:anything-show-completion.el shows selection in buffer for anything completion.