swiftui-core

Covers SwiftUI fundamentals shared across all Apple platforms: composable views and modifiers, navigation (NavigationStack for stack-based flows, NavigationSplitView for multi-column layouts), data persistence with SwiftData (@Model, replacing Core Data for most cases), state management (@State for local, @Observable for shared, @Environment for injection), Liquid Glass styling, and App Intents for Siri/Shortcuts integration.

References cover views/modifiers, navigation, SwiftData, state management, Liquid Glass across platforms, and App Intents in depth.

Best practices: extract subviews once a view body exceeds ~30 lines, compose with ViewBuilder and modifiers, always include #Preview, use semantic colors (.primary/.secondary), add accessibility labels to icons, and adapt layout by size class.

SwiftUI Core

SwiftUI fundamentals shared across all Apple platforms.

Agent Workflow (MANDATORY)

Before ANY implementation, spawn 3 agents in parallel, one Agent call each with a name:

1. fuse-ai-pilot:explore-codebase - Analyze existing SwiftUI patterns
2. fuse-ai-pilot:research-expert - Verify latest SwiftUI docs via Context7/Exa
3. mcp__apple-docs__search_apple_docs - Check SwiftUI view patterns

After implementation, run fuse-ai-pilot:sniper for validation.

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Overview

When to Use

• Building SwiftUI views and components
• Implementing navigation (NavigationStack, SplitView)
• Data persistence with SwiftData
• State management (@State, @Observable)
• Custom view modifiers and layouts

Why SwiftUI Core

Feature	Benefit
Declarative UI	Less code, automatic updates
Cross-platform	Same code for iOS/macOS/watchOS/visionOS
@Observable	Simple reactive state
SwiftData	Modern persistence with minimal code

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Key Concepts

Views & Modifiers

Composable UI building blocks. Extract subviews at 30+ lines.

Navigation

NavigationStack for stack-based, NavigationSplitView for multi-column.

SwiftData

Modern persistence with @Model. Replaces Core Data for most use cases.

State Management

@State for local, @Observable for shared, @Environment for injection.

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Reference Guide

Need	Reference
Views, modifiers, layouts	views-modifiers.md
NavigationStack, deep linking	navigation.md
SwiftData, @Query, CloudKit	data-swiftdata.md
@State, @Observable, Environment	state-management.md
Liquid Glass all platforms	liquid-glass.md
Siri, Shortcuts, App Intents	app-intents.md

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Best Practices

1. Small views - Extract at 30+ lines
2. Composition - Use ViewBuilder and modifiers
3. Preview-driven - Always include #Preview
4. Semantic colors - Use .primary, .secondary
5. Accessibility - Add labels to icons
6. Platform adaptation - Check sizeClass for responsive layouts