asset_pipeline

Run the asset_pipeline convention linter (`scripts/lint_conventions.cr`) — Crystal-side runner that enforces Phase 10 Family 1 naming rules across src/, samples/, and spec/. Use before commit, in CI, or when reviewing a PR.

Build cross-platform apps with UI::App + UI::Screen + UI::Controller + UI::ActionDispatcher + UI::FormState — route declarations, native action dispatch, Amber web integration, and the static-site web target.

The developer-facing guide to building Apple UI (iOS 26, iPadOS 26, macOS 26) with asset_pipeline's UI::View system. Backed by the Apple HIG corpus and validated by macOS + iOS screenshots. Answers "I want to show X — what component, what args, what HIG says."

Complete catalog of Android Jetpack Compose and Material Design 3 components. Covers M3 Expressive (2025), gesture system, graphics/drawing, navigation patterns, theming, and mapping guidance for Crystal cross-platform UI integration via JNI.

Full Apple Human Interface Guidelines corpus packaged offline as searchable markdown. Covers iOS, iPadOS, and macOS guidance for every HIG page, with cross-referenced links, downloaded illustrations, and a tag index. Use as the authoritative design reference when building native UI with asset_pipeline.

Comprehensive cross-platform UI component mapping matrix showing how every common UI pattern maps across Crystal UI::View, SwiftUI, UIKit, AppKit, Jetpack Compose, Android Views, and Web HTML/CSS. Implementation priority guide for expanding the asset_pipeline cross-platform component system.

Architecture patterns and lessons learned from Flutter's widget system, adapted for Crystal's native-rendering approach. Covers the three-tree model, constraint-based layout, platform adaptation, and key differences from asset_pipeline's PlatformVisitor approach. Guides architectural decisions for expanding the cross-platform component system.

Survey of graphics and rendering APIs for cross-platform 2D/3D graphics in Crystal. Covers WebGPU/wgpu-native, Metal 4, Vulkan/MoltenVK, Skia, Filament, and OpenGL ES. Includes FFI feasibility assessment. STUB — implementation deferred, research preserved.

Complete catalog of iOS 26 and macOS 26 native UI components including SwiftUI views, UIKit classes, and AppKit classes. Covers Liquid Glass design language, new WWDC 2025 APIs, and mapping guidance for Crystal cross-platform UI integration.

Full API reference for all UI::View types, value types, enums, and composition patterns

How each platform renderer maps UI::View types to native elements across Web, macOS, iOS, and Android

Build WCAG 2.2 AA compliant interfaces — focus management, ARIA utilities, motion preferences, color contrast, screen reader support

Build UI components using the Crystal component system — knows all 94 HTML elements, 3 component tiers, composition patterns, and the builder DSL

Overview of the Crystal cross-platform UI component system

Style components with the CSS engine — ClassBuilder DSL, Styleable mixin, utility classes, design tokens, and component CSS

Apple glass/translucency effect integration via NSVisualEffectView (macOS) and UIVisualEffectView (iOS)

Add interactivity with Import Maps, Stimulus controllers, and reactive components — FrontLoader API, StimulusRenderer, WebSocket components