30 pairs (28 deterministically scoreable) from the 2,000-postcode sweep,
frozen as ONE anonymised raw-payload JSON (pairs + cohorts + actuals — a
thousand per-cert files would drown the PR diff). The gate replays the
whole conditioning path offline — mapper, conditioning, selection,
synthesis, comparison — in ~9s; floors are the measured values, tighten-
only. comparable_from_payload is extracted from the corpus loader so both
fixture formats share one payload->ComparableProperty path; the builder
(build_expired_pairs_corpus.py) refreezes from the raw-JSON disk cache.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>