If less files are loaded via an AMD loaded instead of less.js, they should be editable via the browser's dev tools.
To really make this feature useful, it's probably worth writing an additional grunt plugin (or at least some kind of client side javascript) that will handle recompiling the changed less files. (less.js can watch the filesystem, but might not be able to watch the already loaded files for changes).
If less files are loaded via an AMD loaded instead of less.js, they should be editable via the browser's dev tools.
To really make this feature useful, it's probably worth writing an additional grunt plugin (or at least some kind of client side javascript) that will handle recompiling the changed less files. (less.js can watch the filesystem, but might not be able to watch the already loaded files for changes).