Pairs of cases in use whose inputs share nearly all their words.
Cases in use every current model gets fully right.
Of the easy ones, those to retire; the rest stay as a floor.
Cases in use: not retired, with a confirmed or provisional answer.
Cases in use that models divide about evenly on.
Drafts nobody has reviewed in STALE_DRAFT_DAYS.
How many cases in use carry each tag, most first.
A suite's answer key, sorted for upkeep: what the feature's page shows under "Answer key health". Only what needs a look is non-empty.