core-components
Core component library and design system patterns. Use when building UI, using design tokens, or working with the component library.
Documentation
Core Components
Design System Overview
Use components from your core library instead of raw platform components. This ensures consistent styling and behavior.
Design Tokens
NEVER hard-code values. Always use design tokens.
Spacing Tokens
// CORRECT - Use tokens
<Box padding="$4" marginBottom="$2" />
// WRONG - Hard-coded values
<Box padding={16} marginBottom={8} />
| Token | Value |
|---|---|
$1 | 4px |
$2 | 8px |
$3 | 12px |
$4 | 16px |
$6 | 24px |
$8 | 32px |
Color Tokens
// CORRECT - Semantic tokens
<Text color="$textPrimary" />
<Box backgroundColor="$backgroundSecondary" />
// WRONG - Hard-coded colors
<Text color="#333333" />
<Box backgroundColor="rgb(245, 245, 245)" />
| Semantic Token | Use For |
|---|---|
$textPrimary | Main text |
$textSecondary | Supporting text |
$textTertiary | Disabled/hint text |
$primary500 | Brand/accent color |
$statusError | Error states |
$statusSuccess | Success states |
Typography Tokens
<Text fontSize="$lg" fontWeight="$semibold" />
| Token | Size |
|---|---|
$xs | 12px |
$sm | 14px |
$md | 16px |
$lg | 18px |
$xl | 20px |
$2xl | 24px |
Core Components
Box
Base layout component with token support:
<Box
padding="$4"
backgroundColor="$backgroundPrimary"
borderRadius="$lg"
>
{children}
</Box>
HStack / VStack
Horizontal and vertical flex layouts:
<HStack gap="$3" alignItems="center">
<Icon name="user" />
<Text>Username</Text>
</HStack>
<VStack gap="$4" padding="$4">
<Heading>Title</Heading>
<Text>Content</Text>
</VStack>
Text
Typography with token support:
<Text
fontSize="$lg"
fontWeight="$semibold"
color="$textPrimary"
>
Hello World
</Text>
Button
Interactive button with variants:
<Button
onPress={handlePress}
variant="solid"
size="md"
isLoading={loading}
isDisabled={disabled}
>
Click Me
</Button>
| Variant | Use For |
|---|---|
solid | Primary actions |
outline | Secondary actions |
ghost | Tertiary/subtle actions |
link | Inline actions |
Input
Form input with validation:
<Input
value={value}
onChangeText={setValue}
placeholder="Enter text"
error={touched ? errors.field : undefined}
label="Field Name"
/>
Card
Content container:
<Card padding="$4" gap="$3">
<CardHeader>
<Heading size="sm">Card Title</Heading>
</CardHeader>
<CardBody>
<Text>Card content</Text>
</CardBody>
</Card>
Layout Patterns
Screen Layout
const MyScreen = () => (
<Screen>
<ScreenHeader title="Page Title" />
<ScreenContent padding="$4">
{/* Content */}
</ScreenContent>
</Screen>
);
Form Layout
<VStack gap="$4" padding="$4">
<Input label="Name" {...nameProps} />
<Input label="Email" {...emailProps} />
<Button isLoading={loading}>Submit</Button>
</VStack>
List Item Layout
<HStack
padding="$4"
gap="$3"
alignItems="center"
borderBottomWidth={1}
borderColor="$borderLight"
>
<Avatar source={{ uri: imageUrl }} size="md" />
<VStack flex={1}>
<Text fontWeight="$semibold">{title}</Text>
<Text color="$textSecondary" fontSize="$sm">{subtitle}</Text>
</VStack>
<Icon name="chevron-right" color="$textTertiary" />
</HStack>
Anti-Patterns
// WRONG - Hard-coded values
<View style={{ padding: 16, backgroundColor: '#fff' }}>
// CORRECT - Design tokens
<Box padding="$4" backgroundColor="$backgroundPrimary">
// WRONG - Raw platform components
import { View, Text } from 'react-native';
// CORRECT - Core components
import { Box, Text } from 'components/core';
// WRONG - Inline styles
<Text style={{ fontSize: 18, fontWeight: '600' }}>
// CORRECT - Token props
<Text fontSize="$lg" fontWeight="$semibold">
Component Props Pattern
When creating components, use token-based props:
interface CardProps {
padding?: '$2' | '$4' | '$6';
variant?: 'elevated' | 'outlined' | 'filled';
children: React.ReactNode;
}
const Card = ({ padding = '$4', variant = 'elevated', children }: CardProps) => (
<Box
padding={padding}
backgroundColor="$backgroundPrimary"
borderRadius="$lg"
{...variantStyles[variant]}
>
{children}
</Box>
);
Integration with Other Skills
- react-ui-patterns: Use core components for UI states
- testing-patterns: Mock core components in tests
- storybook: Document component variants
When to Use
This skill is applicable to execute the workflow or actions described in the overview.
Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety bounda
Quick Info
- Source
- antigravity
- Category
- Document Processing
- Repository
- View Repo
- Scraped At
- Jan 26, 2026
Tags
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