New eidos component built ON TOP of RadioGroup with zero duplicated
behaviour. RadioCards reuses RadioGroup's soma wholesale (selection,
roving focus, role=radio, native <form> via HiddenInput) and adds only
the card chrome: icon · title · description + an always-present corner
radio. Vertical, horizontal and grid layouts.
- morfo: scope:['eidos'], thin contract for presentation parts only
(Provider marker, Item-card, Indicator, Icon, Content, Title,
Description). The interactive contract + commit-select stay in
radio-group, reused via its soma. No new soma, no new sema.
- eidos: `radio-cards` recipe (card chrome) + wrappers + radio-cards.css.
radio-group.css is NOT loaded here, only its foundation tokens — the
card owns its visual, reusing --_radio-group-palette-* (inlined, since a
:root token referencing the palette is invalid-at-computed-value).
- demo: canonical structure (always-on stage + trace, tabs, chip/switch
controls, Untitled-UI example patterns) + nav entry + README.
check 0 · eidos-lint 0 invalid. Browser-verified: select (click + keyboard
roving), disabled, the three layouts, controls drive the preview.
Follow-up: icon/circle sizes are still px (mirroring radio-group's own size
tokens) — making the control-size scale density-aware is a separate,
family-wide change deferred per request.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
dev
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