server-buffer

server-buffer is a variable defined in `server.el'.
Its value is

" *server*"

• This variable may be risky if used as a file-local variable.

Documentation:
Buffer used internally by Emacs's server.
One use is to log the I/O for debugging purposes (see option `server-log'),
the other is to provide a current buffer in which the process filter can
safely let-bind buffer-local variables like `default-directory'.