/.*                      # Stuff
 (                        # START capturing to $1 
    \[*                   # 0 or more [s
    \w*                   # 0 or more word characters
    \@*                   # 0 or more @s
    \-*                   # 0 or more -s
    \w*                   # more word characters
    [$\ \#\%>~]           # exactly 1 space, $, #, %, > or ~
    \]                    # exactly 1 ] (are you missing a * ?)
  |                       # OR 
    \\\[\\e\[0m\\\]\ \[0m # the sequence: \[\e[0m\\] [0m
 )                        # END of $1
\s?                      # 0 or 1 spaces
/x