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Pairing ruling (docs/stage-05-rq1p2-pairing-clarification.md, RATIFIED-by- derivation, made while BLIND): the frozen §6 L197-198 "paired" bootstrap pairs the bridge-on (no-pad) and bridge-on+padding arms BY RUN INDEX — the only balanced pairing the R=30 (§4 L111) interleaved (§3 L97) design supports; the §4 L108 RQ1 unit is AUC over the (entry,exit) pair set, so the pairable unit is the run, not the circuit. Prereg SHA untouched (f22331a72e…). confirm_load.collect_rq1_p2_paired feeds one confirm.PairedCircuit per shared run_index into the FROZEN confirm.rq1_p2_padding (§6 arm-level ΔAUC preserved); per_run_delta_aucs exposes the auditable per-run ΔAUC_i; missing-arm indices are unpaired (frozen R not redefined). Unit-tested on SYNTHETIC pcaps only (prereg §2 blinding — unblocks CODE not RESULTS); full SOR suite 176 passed. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>