Enforce Single Source of Truth for SwiftUI state management.
npx skills add https://github.com/xtone/ai_development_tools --skill swiftui-ssot
Please help me install this Agent Skill. Skill: swiftui-ssot Source: https://github.com/xtone/ai_development_tools/tree/main/ios_development/skills/swiftui-ssot Command: npx skills add https://github.com/xtone/ai_development_tools --skill swiftui-ssot
SwiftUI apps often suffer from duplicated or inconsistent state across views. This Skill provides a structured SSOT (Single Source of Truth) framework to centralize state ownership, ensure unidirectional data flow, and guide architects and reviewers in selecting the right property wrappers and patterns.
Review references/ssot.md to understand the SSOT pillars, then apply the recommended patterns by lifting shared state to a common owner and preferring bindings over duplicate local state.
High-intent search queries and answers about installing and using this skill.
To prevent duplicated or inconsistent state in SwiftUI, establish a Single Source of Truth by lifting shared state to a common owner. This enforces unidirectional data flow and keeps view architectures maintainable.
Use @StateObject when the view owns and initializes the object's lifecycle, and @ObservedObject when referencing an externally owned object. This wrapper selection enforces a Single Source of Truth and prevents accidental state duplication.
The best way to pass shared SwiftUI state without duplicating it is using @EnvironmentObject for dependency injection down the view tree, combined with @Binding to connect child views back to the single source of truth.
Review SwiftUI pull requests for state management anti-patterns by applying an SSOT review checklist. Verify that property wrappers match ownership boundaries, shared state is lifted to a common parent, and data flow remains unidirectional.
Using @ObservedObject where @StateObject is needed causes incorrect SwiftUI view updates because the view does not own the object's lifecycle. This breaks the Single Source of Truth, leading to duplicated state and unexpected data loss.
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