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Though I had previously assumed stability is more important
than the precise details of what module Cookie does (since
you can choose what cookies you send, the only important
thing is that behaviour is relatively sane, and does the job
-- in a standards-compliant way -- with browsers).  But I
suppose one can have JS code or other web app code
maintained by others, and have to understand cookies that
were emitted by that code.  Is that your situation?

Do 'serious' web developers use module Cookie, or do people
now tend to use web frameworks' own cookie code (personally
I don't use cookies in my web application work).  If the
former, perhaps we should not tinker with this module.