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swift-composable-architecture skill

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This skill helps you build robust Swift applications with composable state management, testability, and scalable architecture using the Composable Architecture.

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SKILL.md

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---
name: swift-composable-architecture
description: The Composable Architecture (TCA) - A library for building Swift applications with state management, composition, and testability
---

# ComposableArchitecture

The Composable Architecture (TCA, for short) is a library for building applications in a consistent

## Documentation Structure

### Essentials

- **Getting started** ([Articles/GettingStarted.md](Articles/GettingStarted.md)): Learn how to integrate the Composable Architecture into your project and write your first
- **Dependencies** ([Articles/DependencyManagement.md](Articles/DependencyManagement.md)): Learn how to register dependencies with the library so that they can be immediately accessible from
- **Testing** ([Articles/TestingTCA.md](Articles/TestingTCA.md)): Learn how to write comprehensive and exhaustive tests for your features built in the Composable
- **Navigation** ([Articles/Navigation.md](Articles/Navigation.md)): Learn how to use the navigation tools in the library, including how to best model your domains, how
- **Sharing state** ([Articles/SharingState.md](Articles/SharingState.md)): Learn techniques for sharing state throughout many parts of your application, and how to persist
- **Performance** ([Articles/Performance.md](Articles/Performance.md)): Learn how to improve the performance of features built in the Composable Architecture.
- **Frequently asked questions** ([Articles/FAQ.md](Articles/FAQ.md)): A collection of some of the most common questions and comments people have concerning the library.

### Tutorials

- **Meet Composable Architecture**: *(Not found)*
- **Building Sync Ups**: *(Not found)*

### State management

- **Sharing state** ([Articles/SharingState.md](Articles/SharingState.md)): Learn techniques for sharing state throughout many parts of your application, and how to persist

### Testing

- **Testing** ([Articles/TestingTCA.md](Articles/TestingTCA.md)): Learn how to write comprehensive and exhaustive tests for your features built in the Composable

### Integrations

- **Adopting Swift concurrency** ([Articles/SwiftConcurrency.md](Articles/SwiftConcurrency.md)): Learn how to write safe, concurrent effects using Swift's structured concurrency.
- **SwiftUI Integration** ([Extensions/SwiftUIIntegration.md](Extensions/SwiftUIIntegration.md)): Integrating the Composable Architecture into a SwiftUI application.
- **Observation backport** ([Articles/ObservationBackport.md](Articles/ObservationBackport.md)): Learn how the Observation framework from Swift 5.9 was backported to support iOS 16 and earlier,
- **UIKit Integration** ([Extensions/UIKit.md](Extensions/UIKit.md)): Integrating the Composable Architecture into a UIKit application.

### Migration guides

- **Migration guides** ([Articles/MigrationGuides.md](Articles/MigrationGuides.md)): Learn how to upgrade your application to the newest version of the Composable Architecture.

## Usage Notes

- Documentation is organized progressively from getting started to advanced topics
- Start with the Introduction or Getting Started section
- Consult specific guides for detailed information

## License & Attribution

This skill contains content converted from DocC documentation format.

Overview

This skill exposes the Composable Architecture (TCA) documentation as a focused reference for building Swift apps with predictable state management, composition, and testability. It organizes key topics—from getting started to migration guides—so you can quickly find patterns, integrations, and testing guidance for SwiftUI, UIKit, and concurrency.

How this skill works

The skill surfaces the documentation structure and individual guides so you can navigate essentials like dependency registration, testing, navigation, and performance. It highlights integration articles for Swift concurrency, SwiftUI and UIKit, plus migration and sharing-state techniques to help you apply TCA in real projects.

When to use it

When adopting a predictable, testable state management pattern in a Swift app.
When integrating TCA with SwiftUI, UIKit, or structured concurrency.
When you need step-by-step guidance for tests, navigation, or dependency wiring.
When migrating an app to a newer TCA version or improving performance.
When modeling shared state across multiple features or persisting domain data.

Best practices

Start with the Getting Started guide to learn core concepts and setup.
Define feature domains with clear state, actions, reducers, and environments.
Use the Testing guide to write exhaustive, deterministic tests for effects and reducers.
Prefer small, composable reducers and scoped stores for modularity and reuse.
Consult integration articles for correct Swift concurrency and UI bindings.

Example use cases

Bootstrapping a new SwiftUI app with TCA for centralized state and navigation.
Adding comprehensive unit and effect tests to existing feature modules.
Migrating an app to a newer TCA release using the migration guides.
Sharing authenticated user state across several feature stores.
Integrating structured concurrency effects safely into TCA environments.

FAQ

Where should I start when learning TCA?

Begin with the Getting Started or Introduction material, then follow the Essentials sequence: dependencies, testing, navigation, and integrations.

Can TCA be used with Swift concurrency and SwiftUI?

Yes. The skill links to articles on adopting Swift concurrency and SwiftUI integration that show patterns for safe effects and UI bindings.