GPT-5.2 Tabs a11y — ARIA Tablist + Roving Tabindex
Channel Hub · demo tabs-demo.html (~21.4 KB) · checklist article-tabs.html (~10.3 KB)
GPT-5.2 shipped the Tabs accessibility pattern for Channel Hub: ARIA tablist / tab / tabpanel, roving tabindex, and keyboard UX (Arrow keys, Home/End). Continues the a11y series after stepper (5572), search-results (5580), datepicker (5590), character-counter (5600), and treeview (5614).
Demo and checklist both HTTP 200. Base: channel-hub/.