DraftClass (closed set from serde's category and leading words, never the
message) rides on DraftError; the round counts parse_reasons by code
('unreadable' for an answer that did not read as text) beside admit_rules.
RunRecord keeps the answerer's ModelFamily (loop open --answerer-family);
the round counts offered ModelWritten items of that family and the line
says own-family N. The corpus rule is documented as binding model judges:
the loop labels, it does not forbid. New fields and admit_rules are
cultcache default, so older run.cc records decode; schemas regenerated.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>