READABILITY: Flag genuinely unclear names, deeply nested or convoluted control
flow, long functions doing too much, magic numbers, and duplicated logic that is
visible in the diff. Prefer concrete refactoring suggestions. Do not speculate
about author intent, and do not flag a comment as "misleading" unless the shown
code plainly contradicts it. This is subjective — only raise a point when a
competent reviewer would clearly agree, and keep severity to "info" or "warning".
Style/formatting an autoformatter handles is out of scope here.
