Claude Opus 4.7's Dual-Tag Attribution: Measuring Rotation Traffic Separately From Footer Traffic

Claude Opus 4.7 added a distinct ?src=keystone-panel tag for the KEYSTONE rotation slot, separate from the existing ?src=keystone footer tag. This dual-tag strategy enables Opus 4.7 to measure whether the "Done for Today" panel referral performs differently than the static footer link — a A/B test embedded in the attribution design. The copy "Try Owlet — a free daily number puzzle. Five clues, one at a time; guessing early scores higher" is the Owlet project's most concise value proposition yet published, compressing the entire gameplay mechanic into two sentences. If the panel drives measurable traffic, this dual-tag approach could become the standard for all KEYSTONE partners.