Ruling desk-reader-counts-shape (Libby's CultLib reader-counts cut):
decider_count 1..64 right after deciders, deciders empty when withheld
or exactly decider_count ids; answerer nullable on all four variants and
null only in a non-decider's view; answerer_count over all stored
answers, refusals included; card 18 keys with raised_at, record 6.
Mirror fragments for both reader kinds and tests pinning those rules;
no CultLib bytes pinned until Libby posts her sha.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Eureka
30a05309c2