RE: [ANN] project-buffers.el

[Drew Adams]

> Basically, gives you `next-buffer`, `previous-buffer`,
> `switch-to-buffer` and more, but limited to buffers that
> are in the "current project" (defined as an ancestor dir
> containing one of a defcustomizable list of files, like
> ".git", "Makefile", etc).
>
> Why didn't something like this already exist?

Something like that does exist.  Several such somethings.

http://www.emacswiki.org/emacs/CategoryProject