Bootstrap.less seems like it's just a bunch of LESS preprocessors for things like rounded corners, color transparency, grid layout, etc. Bootstrap goes further

Bootstrap.less seems like it's just a bunch of LESS preprocessors for things like rounded corners, color transparency, grid layout, etc. Bootstrap goes further and includes navigation bars, table styles, alert message styles, and a lot more. It's conceivable that Bootstrap.less is used in Bootstrap, because I know that Bootstrap has similar LESS preprocessors, although I don't know for certain. Skeleton is very similar to Bootstrap, and Skeleton was designed by a designer at Twitter as well. Bootstrap seems to contain more styles for things like tables, alert messages, modal dialogs, etc.