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Sticky 50/50 variant assignment via gw_ab_hero cookie, server-rendered so no flicker. Tracks exposures, CTA clicks, and booking conversions to ab_events (table self-creates on first POST). Bot UAs are dropped; exposures/clicks dedupe per session. - ?ab=control / ?ab=free_emphasis forces and persists a variant - /owner/experiments shows per-variant CVR and relative lift - AB only runs on the marketing surface Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>