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Accessibility
The workbench uses labelled native text areas, selects, checkboxes, file inputs and buttons. Comparison modes and result views are exposed as tab lists, status and diagnostic changes use live regions, and structured results use list or table semantics.
Change kinds are written in text and indicated by +/− markers, not colour alone. Exact CR, LF and tab characters have visible glyphs. Focus indicators remain visible in light, dark and system themes, and controls meet a minimum 2.55 rem target height.
The layout collapses inputs and paired changes to one column on narrow displays. Large side-by-side and summary tables scroll within their region. Reduced-motion preferences suppress the pending animation.
Keyboard users can reach every option, file selector, editor, mode, result view and artifact action in document order. The Toolbox shell owns the global help, app switcher and personalization controls.