Single foreign subject (Qwen3-Coder-Next via IONOS). Two blind
cohorts: one sees only a JSON mini-spec, the other only an .ailx
mini-spec; same four tasks. Fairness anchored by a master source
plus a renderer (built on the existing ailang-surface roundtrip
machinery) that projects two form versions from one canonical
content base. Harness shells out to ail parse / check / build / run
and feeds back location-stripped errors so the JSON-pointer
asymmetry doesn't tilt the experiment. Out of scope for v1: a
verdict on Decision 6, a free-choice cohort, repetitions, a second
subject.
Grounding-check PASS on cma.1 (master + renderer + tests).
Brummel
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