This small python script makes use of
sh) to monitor your code directory (recursively) and build less and CoffeeScript files upon edit.
Simply launch it from the relevant folder and it will work in the background.
It should be trivial to add minification (and linting, but I suggest linting in the editor) to the process.
npm install coffee-script) and
npm install less).
Should be compatible with Mac OS X and Linux at least, BSD and Win… maybe.