swift-composable-architecture

Model app behavior by mapping actions to state changes in the Composable Architecture.

16|2|Updated Jan 1, 2026

Search Tags:#testing #navigation #Swift #TCA #Reducer #Store

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npx skills add https://github.com/nonameplum/agent-skills --skill swift-composable-architecture

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: swift-composable-architecture
Source: https://github.com/nonameplum/agent-skills/tree/main/swift-composable-architecture
Command: npx skills add https://github.com/nonameplum/agent-skills --skill swift-composable-architecture

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

The Composable Architecture (TCA) provides a structured approach to modeling state, actions, and effects, simplifying complex Swift apps and making behavior predictable.

Core Features & Use Cases

Reducer-driven state management: Define how actions transform state and produce effects in a modular, testable way.
Composable navigation and dependencies: Seamlessly compose features, share dependencies, and drive navigation in SwiftUI and UIKit.
Testing and debugging: Use TestStore to exhaustively or non-exhaustively verify state changes and effects across flows.

Quick Start

Install and integrate TCA into a Swift project, then create a Store with an initial State and a Reducer to begin modeling your feature. Example: define State, Action, and Reducer, create a Store, and drive UI with SwiftUI.

Frequently Asked Questions about swift-composable-architecture

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I manage predictable state in Swift apps using reducers?▼

Reducers manage predictable state in Swift apps by defining how actions transform state and produce effects. This modular approach maps actions to state changes, ensuring behavior remains testable and consistent across features.

What is the best way to test state changes and effects in Swift?▼

The best way to test state changes and effects in Swift is using TestStore to exhaustively or non-exhaustively verify flows. This confirms actions produce expected state mutations and effects, ensuring reliable behavior across your application.

Can I use the Composable Architecture for navigation in SwiftUI and UIKit?▼

Yes, you can use the Composable Architecture for navigation in SwiftUI and UIKit. It enables composable navigation by allowing you to seamlessly compose features, share dependencies, and drive navigation across both UI frameworks.

How do I start modeling app behavior with state and actions in Swift?▼

To start modeling app behavior in Swift, create a Store with an initial State and a Reducer. Define your State, Action, and Reducer, then drive your UI with SwiftUI to begin mapping actions to state changes.

Why does organizing dependencies separately improve Swift app architecture?▼

Organizing dependencies separately improves Swift app architecture by making features composable and testable. Sharing dependencies modularly prevents tangled code, allowing you to isolate effects and verify state changes reliably during testing.