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swiftui-code-review

Testing & Quality
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Reviews SwiftUI code for view composition, state management, performance, and accessibility. Use when reviewing .swift files containing SwiftUI views, property wrappers (@State, @Binding, @Observable), or UI code.

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How to use this skill

Bring this guide into your coding agent with a prompt tailored to the tool you use.

  1. Open your project in Codex.
  2. Copy the prompt below and paste it into your agent.
  3. Review the proposed files and risks before you approve installation.
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I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/quality/swiftui-code-review/SKILL.md

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First, summarize what it does, its dependencies, license status if identifiable, and any risks. Show the exact files you propose to add under .agents/skills/swiftui-code-review/. Do not write files or run scripts until I approve.

After I approve, install the complete skill folder, including required referenced files, into that project location. Verify it is discoverable, then tell me its actual invocation name and how to use it. Do not claim it is installed until you have verified it.

Copying this prompt does not install or run the skill. Review third-party files before use. Codex skill guide

SwiftUI Code Review

Quick Reference

Issue TypeReference
View extraction, modifiers, body complexityreferences/view-composition.md
@State, @Binding, @Observable, @Bindablereferences/state-management.md
LazyStacks, AnyView, ForEach, identityreferences/performance.md
VoiceOver, Dynamic Type, labels, traitsreferences/accessibility.md

Gates (review workflow)

Complete in order; do not skip ahead.

  1. Anchor scope — Pass when: every reviewed file is listed as a repo-relative .swift path (or the review explicitly states “none opened / N/A” with reason).
  2. Reference before critique — Pass when: for any non-trivial body, modifier chain, or wrapper-ownership question, you have opened the matching references/*.md row from the table above or you state “not needed” with one line why.
  3. Evidence-bound findings — Pass when: each substantive issue includes [FILE:LINE] (or a bounded line range) before recommendations; symbols/snippets may supplement but not replace the location anchor; no finding that rests only on “typical SwiftUI” without pointing at this code.

Review Checklist

  • View body under 10 composed elements (extract subviews)
  • Modifiers in correct order (padding before background)
  • @StateObject for view-owned objects, @ObservedObject for passed objects
  • @Bindable used for two-way bindings to @Observable (iOS 17+)
  • LazyVStack/LazyHStack for scrolling lists with 50+ items
  • No AnyView (use @ViewBuilder or generics instead)
  • ForEach uses stable Identifiable IDs (not array indices)
  • All images/icons have accessibilityLabel
  • Custom controls have accessibilityAddTraits(.isButton)
  • Dynamic Type supported (no fixed font sizes)
  • .task modifier for async work (not onAppear + Task)

When to Load References

  • Complex view bodies or modifier chains -> view-composition.md
  • Property wrapper usage (@State, @Observable) -> state-management.md
  • List performance or view identity issues -> performance.md
  • VoiceOver or accessibility implementation -> accessibility.md

Review Questions

  1. Could this large view body be split into smaller, reusable Views?
  2. Is modifier order intentional? (padding -> background -> frame)
  3. Is @StateObject/@ObservedObject usage correct for ownership?
  4. Could LazyVStack improve this ScrollView's performance?
  5. Would VoiceOver users understand this interface?