A code-review guide for SwiftUI, Apple’s framework for building app interfaces with Swift.

Use it when writing or reviewing SwiftUI apps, including checks for VoiceOver, Dynamic Type, Reduce Motion, modern concurrency, and Apple interface guidelines.

It helps find real problems involving outdated APIs, data flow, navigation, accessibility, performance, and project code quality.

swiftui-pro — Skill for Claude Code and Codex by jacklandrin: A code-review guide for SwiftUI, Apple’s framework for building…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add skills/jacklandrin/onlyswitch/swiftui-pro

Any agent

npx skills add jacklandrin/OnlySwitch --skill swiftui-pro

Clone the repo

git clone --depth 1 https://github.com/jacklandrin/OnlySwitch

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/jacklandrin/onlyswitch/swiftui-pro.svg)](https://agentmods.dev/skills/jacklandrin/onlyswitch/swiftui-pro)

Your own site

<a href="https://agentmods.dev/skills/jacklandrin/onlyswitch/swiftui-pro"><img src="https://agentmods.dev/badge/skills/jacklandrin/onlyswitch/swiftui-pro.svg" alt="Measured on agentmods" height="20"></a>

Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 920 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5	$0.00036	$0.00920
Opus 5	$0.00018	$0.00460
Sonnet 5	$0.00007	$0.00184
Haiku 4.5	$0.00004	$0.00092

Measured 4d ago against content hash 016a4fb9cad1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

swiftui-pro scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

3 near-identical copies found in the catalogue:

swiftui-pro — 100% identical, 2 lines differ
swiftui-pro — 100% identical, 2 lines differ
swiftui-pro — 100% identical, 0 lines differ

doc/skills/swiftui-pro/SKILL.md · 109 lines

How it starts

The opening of the file, as written. The whole thing — 109 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Review Swift and SwiftUI code for correctness, modern API usage, and adherence to project conventions. Report only genuine problems - do not nitpick or invent issues.

Review process:

Check for deprecated API using references/api.md.
Check that views, modifiers, and animations have been written optimally using references/views.md.
Validate that data flow is configured correctly using references/data.md.
Ensure navigation is updated and performant using references/navigation.md.
Ensure the code uses designs that are accessible and compliant with Apple’s Human Interface Guidelines using references/design.md.
Validate accessibility compliance including Dynamic Type, VoiceOver, and Reduce Motion using references/accessibility.md.
Ensure the code is able to run efficiently using references/performance.md.
Quick validation of Swift code using references/swift.md.
Final code hygiene check using references/hygiene.md.

If doing a partial review, load only the relevant reference files.

Core Instructions

iOS 26 exists, and is the default deployment target for new apps.
Target Swift 6.2 or later, using modern Swift concurrency.
As a SwiftUI developer, the user will want to avoid UIKit unless requested.
Do not introduce third-party frameworks without asking first.
Break different types up into different Swift files rather than placing multiple structs, classes, or enums into a single file.
Use a consistent project structure, with folder layout determined by app features.

Output Format

Organize findings by file. For each issue:

State the file and relevant line(s).
Name the rule being violated (e.g., "Use foregroundStyle() instead of foregroundColor()").
Show a brief before/after code fix.

Skip files with no issues. End with a prioritized summary of the most impactful changes to make first.

Example output:

ContentView.swift

Line 12: Use foregroundStyle() instead of foregroundColor().

Read the full file on GitHub · 109 lines

Files

What ships with it

12 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

4d ago First seen · 109 lines · 36 tokens per session scan A 016a4fb9cad1

Subscribe to this mod's changes

swiftui-pro is a skill published in the GitHub repository jacklandrin/OnlySwitch (5,904 stars, last pushed 4d ago), licensed MIT. It adds 36 tokens to every session and 920 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Code review Mobile macos menubar-app notch statusbar swiftui wallpaper

awesome-swift-macos-apps-docs

Use when adding, updating, or validating app entries in the awesome-swift-macos-apps repository, especially when maintaining both README.md and README.zh.md with concise one-sentence descriptions, correct category placement, and consistent bilingual formatting.

jaywcjlove/awesome-swift-macos-apps · 57 tokens

swift-focusengine-pro

Reviews, writes, and fixes focus management code for all Apple platforms (tvOS, iOS/iPadOS, watchOS, visionOS, macOS), covering SwiftUI, UIKit, AppKit, and RealityKit. Use when reading, writing, or reviewing apps that handle focus, hover, key view loops, or Digital Crown navigation.

mhaviv/Swift-FocusEngine-Agent-Skill · 74 tokens

macos-build

Build a native macOS app using xcodebuild from the command line. Use this skill whenever the user asks to build, compile, or check if their macOS project compiles successfully. Also use it when the user asks to fix build errors, verify changes compile, or run a debug build. Trigger on phrases like "build the app"…

phun333/pi-infobar · 95 tokens

swiftui-pro