Plan step 22, actions.md § Missing (Selection-required / multi-select
semantics): M3 lists single-select, multi-select and selection-required as
button-group configurations, and `<x-button-group connected>` left
selection entirely to the caller's own `aria-pressed`.
`selection="single|multi"`, with `required`, takes `aria-pressed` over:
pressing a button writes its `value` to `wire:model` or `x-model`,
deselects the others in `single`, and refuses the press that would leave
nothing selected. With no model it reads the buttons' own `aria-pressed`
once and goes on from there.
`<x-group>` and this do not absorb one another, and the header and
SKILL.md say why: `<x-group>` is for a choice whose options are data — it
renders real inputs, posts in a plain form and paints its own segments —
and stays the first thing to reach for; a selection group governs buttons
the caller writes, manages state and shape, and leaves each button to draw
its own colours from its own `:selected`.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
