use stricter 'names';     # no names in MixedCaps
use stricter 'features';  # no ties, lvalue subs or pseudohashes
use stricter 'accessors'; # no accessors that are also mutators
use stricter 'open'       # 3-argument open only
use stricter 'syntax';    # no 'until' or 'unless' or c-style 'for' loops
use stricter 'whitespace' # no tabs, only spaces
use stricter 'layout';    # must match a perltidy format