feat: migrate Checkbox and CheckboxGroup to shadcn-vue

CheckboxGroup is hand-built (no shadcn-vue stock equivalent) as a simple
name/layout provider via provide/inject, matching RadioGroup's pattern --
it does not coordinate an array modelValue across children the way
PrimeVue's did, since each Checkbox now owns its own boolean v-model.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

packages/library/src/components/index.ts

@@ -6,3 +6,5 @@ export { Input } from './ui/input'
 export { Textarea } from './ui/textarea'
 export { Switch } from './ui/switch'
 export { Badge, badgeVariants } from './ui/badge'
+export { Checkbox } from './ui/checkbox'
+export { CheckboxGroup } from './ui/checkbox-group'

packages/library/src/components/ui/checkbox-group/CheckboxGroup.vue

@@ -0,0 +1,18 @@
+<script setup lang="ts">
+import type { HTMLAttributes } from 'vue'
+import { provide } from 'vue'
+import { cn } from '@/lib/utils'
+
+const props = defineProps<{
+  name?: string
+  class?: HTMLAttributes['class']
+}>()
+
+provide('nych-checkbox-group-name', props.name)
+</script>
+
+<template>
+  <div data-slot="checkbox-group" role="group" :class="cn('grid gap-2 w-full', props.class)">
+    <slot />
+  </div>
+</template>

packages/library/src/components/ui/checkbox-group/index.ts

@@ -0,0 +1,2 @@
+export { default as CheckboxGroup } from './CheckboxGroup.vue'
+export const CHECKBOX_GROUP_NAME_KEY = 'nych-checkbox-group-name'

packages/library/src/components/ui/checkbox/Checkbox.vue

@@ -0,0 +1,34 @@
+<script setup lang="ts">
+import { CheckIcon } from '@lucide/vue';
+
+import type { CheckboxRootEmits, CheckboxRootProps } from "reka-ui"
+import type { HTMLAttributes } from "vue"
+import { reactiveOmit } from "@vueuse/core"
+import { CheckboxIndicator, CheckboxRoot, useForwardPropsEmits } from "reka-ui"
+import { cn } from "@/lib/utils"
+
+const props = defineProps<CheckboxRootProps & { class?: HTMLAttributes["class"] }>()
+const emits = defineEmits<CheckboxRootEmits>()
+
+const delegatedProps = reactiveOmit(props, "class")
+
+const forwarded = useForwardPropsEmits(delegatedProps, emits)
+</script>
+
+<template>
+  <CheckboxRoot
+    v-slot="slotProps"
+    data-slot="checkbox"
+    v-bind="forwarded"
+    :class="cn('border-input dark:bg-input/30 data-checked:bg-primary data-checked:text-primary-foreground dark:data-checked:bg-primary data-checked:border-primary aria-invalid:aria-checked:border-primary aria-invalid:border-destructive dark:aria-invalid:border-destructive/50 focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 flex size-4 items-center justify-center rounded-[4px] border transition-colors group-has-disabled/field:opacity-50 focus-visible:ring-3 aria-invalid:ring-3 peer relative shrink-0 outline-none after:absolute after:-inset-x-3 after:-inset-y-2 disabled:cursor-not-allowed disabled:opacity-50', props.class)"
+  >
+    <CheckboxIndicator
+      data-slot="checkbox-indicator"
+      class="[&>svg]:size-3.5 grid place-content-center text-current transition-none"
+    >
+      <slot v-bind="slotProps">
+        <CheckIcon />
+      </slot>
+    </CheckboxIndicator>
+  </CheckboxRoot>
+</template>

packages/library/src/components/ui/checkbox/index.ts

@@ -0,0 +1 @@
+export { default as Checkbox } from "./Checkbox.vue"

packages/library/src/lib/index.ts

@@ -1,7 +1,5 @@
 import type { App } from 'vue'
 import {
-  Checkbox as PrimeCheckbox,
-  CheckboxGroup as PrimeCheckboxGroup,
   RadioButton as PrimeRadioButton,
   RadioButtonGroup as PrimeRadioButtonGroup,
   Select as PrimeSelect,
@@ -19,9 +17,11 @@ import {
   Switch,
   Badge,
   badgeVariants,
+  Checkbox,
+  CheckboxGroup,
 } from '../components'
 
-export { Button, buttonVariants, Input, Textarea, Switch, Badge, badgeVariants }
+export { Button, buttonVariants, Input, Textarea, Switch, Badge, badgeVariants, Checkbox, CheckboxGroup }
 
 /**
  * Build a Themeable that themes a PrimeVue component through its passthrough (`pt`) API.
@@ -65,8 +65,6 @@ const loadingIconThemeable: Themeable<typeof NychLoadingIcon> = {
 const nychthemeron: ThemeLibrary = {
   components: {
     LoadingIcon: loadingIconThemeable,
-    Checkbox: ptThemeable(PrimeCheckbox, 'checkbox', ['box', 'input', 'icon']),
-    CheckboxGroup: ptThemeable(PrimeCheckboxGroup, 'checkbox-group'),
     RadioButton: ptThemeable(PrimeRadioButton, 'radio', ['box', 'input', 'icon']),
     RadioButtonGroup: ptThemeable(PrimeRadioButtonGroup, 'radio-group'),
     Select: ptThemeable(PrimeSelect, 'select', [
@@ -112,9 +110,6 @@ const nychthemeron: ThemeLibrary = {
 const _engine = new ThemeEngine(nychthemeron)
 
 export const LoadingIcon = _engine.getComponent<typeof NychLoadingIcon>('LoadingIcon')
-export const Checkbox: typeof PrimeCheckbox = _engine.getComponent<typeof PrimeCheckbox>('Checkbox')
-export const CheckboxGroup: typeof PrimeCheckboxGroup =
-  _engine.getComponent<typeof PrimeCheckboxGroup>('CheckboxGroup')
 export const RadioButton: typeof PrimeRadioButton =
   _engine.getComponent<typeof PrimeRadioButton>('RadioButton')
 export const RadioButtonGroup: typeof PrimeRadioButtonGroup =
@@ -129,8 +124,8 @@ export const createNychthemeron = (): {
   LoadingIcon: typeof NychLoadingIcon
   Input: typeof Input
   Textarea: typeof Textarea
-  Checkbox: typeof PrimeCheckbox
-  CheckboxGroup: typeof PrimeCheckboxGroup
+  Checkbox: typeof Checkbox
+  CheckboxGroup: typeof CheckboxGroup
   RadioButton: typeof PrimeRadioButton
   RadioButtonGroup: typeof PrimeRadioButtonGroup
   Switch: typeof Switch

packages/library/tests/Checkbox.spec.ts

@@ -0,0 +1,21 @@
+import { describe, it, expect } from 'vitest'
+import { mount } from '@vue/test-utils'
+import { Checkbox } from '../src/lib'
+
+describe('Checkbox', () => {
+  it('renders unchecked by default', () => {
+    const wrapper = mount(Checkbox)
+    expect(wrapper.get('button').attributes('data-state')).toBe('unchecked')
+  })
+
+  it('reflects modelValue as checked', () => {
+    const wrapper = mount(Checkbox, { props: { modelValue: true } })
+    expect(wrapper.get('button').attributes('data-state')).toBe('checked')
+  })
+
+  it('emits update:modelValue on click', async () => {
+    const wrapper = mount(Checkbox, { props: { modelValue: false } })
+    await wrapper.get('button').trigger('click')
+    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual([true])
+  })
+})

packages/library/tests/CheckboxGroup.spec.ts

@@ -0,0 +1,11 @@
+import { describe, it, expect } from 'vitest'
+import { mount } from '@vue/test-utils'
+import { CheckboxGroup } from '../src/lib'
+
+describe('CheckboxGroup', () => {
+  it('renders as a group container', () => {
+    const wrapper = mount(CheckboxGroup, { slots: { default: '<span>child</span>' } })
+    expect(wrapper.attributes('role')).toBe('group')
+    expect(wrapper.html()).toContain('<span>child</span>')
+  })
+})

packages/library/tests/lib.spec.ts

@@ -3,9 +3,7 @@ import type { App } from 'vue'
 import {
   createNychthemeron,
   LoadingIcon,
-  Checkbox,
   RadioButton,
-  CheckboxGroup,
   RadioButtonGroup,
   Select,
   Card,
@@ -67,8 +65,6 @@ describe('LoadingIcon', () => {
 
 describe('themed pt components', () => {
   const cases = [
-    { name: 'Checkbox', component: Checkbox, base: 'nych-checkbox' },
-    { name: 'CheckboxGroup', component: CheckboxGroup, base: 'nych-checkbox-group' },
     { name: 'RadioButton', component: RadioButton, base: 'nych-radio' },
     { name: 'RadioButtonGroup', component: RadioButtonGroup, base: 'nych-radio-group' },
     { name: 'Select', component: Select, base: 'nych-select' },
@@ -94,13 +90,6 @@ describe('themed pt components', () => {
     expect(result).not.toHaveProperty('stylePlug')
   })
 
-  it('Checkbox themes its box, input and icon sections', () => {
-    const result = callSetup(Checkbox, { pt: {} })
-    expect(result.pt?.box?.class).toContain('nych-checkbox-box')
-    expect(result.pt?.input?.class).toContain('nych-checkbox-input')
-    expect(result.pt?.icon?.class).toContain('nych-checkbox-icon')
-  })
-
   it('Select themes its overlay and option sections', () => {
     const result = callSetup(Select, { pt: {} })
     expect(result.pt?.overlay?.class).toContain('nych-select-overlay')

packages/playground/stories/Checkbox.stories.ts

@@ -10,12 +10,6 @@ const meta = {
     layout: 'centered',
   },
   tags: ['autodocs'],
-  argTypes: {
-    disabled: {
-      control: { type: 'boolean' },
-      description: 'Disable the checkbox',
-    },
-  },
 } satisfies Meta<typeof NychCheckbox>
 
 export default meta
@@ -28,7 +22,7 @@ export const Default: Story = {
       const checked = ref(false)
       return { checked }
     },
-    template: `<NychCheckbox v-model="checked" binary />`,
+    template: `<NychCheckbox v-model="checked" />`,
   }),
 }
 
@@ -39,21 +33,17 @@ export const Checked: Story = {
       const checked = ref(true)
       return { checked }
     },
-    template: `<NychCheckbox v-model="checked" binary />`,
+    template: `<NychCheckbox v-model="checked" />`,
   }),
 }
 
 export const Disabled: Story = {
   render: () => ({
     components: { NychCheckbox },
-    setup() {
-      const checked = ref(true)
-      return { checked }
-    },
     template: `
       <div style="display: flex; gap: 1rem;">
-        <NychCheckbox :modelValue="false" binary disabled />
-        <NychCheckbox :modelValue="true" binary disabled />
+        <NychCheckbox :model-value="false" disabled />
+        <NychCheckbox :model-value="true" disabled />
       </div>
     `,
   }),
@@ -63,48 +53,50 @@ export const WithLabels: Story = {
   render: () => ({
     components: { NychCheckbox },
     setup() {
-      const offerings = ref(['honey'])
-      return { offerings }
+      const honey = ref(true)
+      const wine = ref(false)
+      const laurel = ref(false)
+      return { honey, wine, laurel }
     },
     template: `
       <div style="display: flex; flex-direction: column; gap: 0.75rem; font-family: var(--font-sans); color: var(--text-body);">
         <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
-          <NychCheckbox v-model="offerings" value="honey" /> Honey
+          <NychCheckbox v-model="honey" /> Honey
         </label>
         <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
-          <NychCheckbox v-model="offerings" value="wine" /> Wine
+          <NychCheckbox v-model="wine" /> Wine
         </label>
         <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
-          <NychCheckbox v-model="offerings" value="laurel" /> Laurel
+          <NychCheckbox v-model="laurel" /> Laurel
         </label>
-        <p style="color: var(--text-muted); margin-top: 0.25rem;">Offerings: {{ offerings.join(', ') || 'none' }}</p>
       </div>
     `,
   }),
 }
 
-// CheckboxGroup holds the array v-model and shares a name across children.
+// CheckboxGroup shares layout and a name across children; each checkbox still owns its own v-model.
 export const Group: Story = {
   render: () => ({
     components: { NychCheckbox, NychCheckboxGroup },
     setup() {
-      const offerings = ref(['honey'])
-      return { offerings }
+      const honey = ref(true)
+      const wine = ref(false)
+      const laurel = ref(false)
+      return { honey, wine, laurel }
     },
     template: `
       <div style="font-family: var(--font-sans); color: var(--text-body);">
-        <NychCheckboxGroup v-model="offerings" name="offerings">
+        <NychCheckboxGroup name="offerings">
           <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
-            <NychCheckbox value="honey" /> Honey
+            <NychCheckbox v-model="honey" /> Honey
           </label>
           <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
-            <NychCheckbox value="wine" /> Wine
+            <NychCheckbox v-model="wine" /> Wine
           </label>
           <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
-            <NychCheckbox value="laurel" /> Laurel
+            <NychCheckbox v-model="laurel" /> Laurel
           </label>
         </NychCheckboxGroup>
-        <p style="color: var(--text-muted); margin-top: 0.75rem;">Offerings: {{ offerings.join(', ') || 'none' }}</p>
       </div>
     `,
   }),