Eproject is a minor-mode that allows the grouping of related files as projects. It aims to be as unobtrusive as possible -- no new files are created (or required to exist) on disk, and buffers that are not a member of a project are not affected in any way. Where 'auto-mode-alist activates MODE for FILE-REGEX, Eproject activates PROJECT-TYPE for FILES-IN-DIRECTORY, when PROJECT-TYPE-DEFINITION is true. It also creates a customisable hook that is run whenever a file belonging to a project is visited.