compile.json option to inhibit autocompile unless 'out:' is specified in a file?

[MDBenson]

I like having auto-compile for LESS style-sheets for the sheets I need to compile, but I have a lot of sheets I don't need or want auto-compiling. Specifying an option for each of these (like, everything in bootstrap except variables.less, for a start) is hard to maintain and cumbersome, is there a way or could it be implemented to only compile files with 'out: xxxx.css' specified in the compile options header?

Apologies if this is already there, I didn't see it documented.

[jdiehl]

This does not exist, yet. Any takers?