A SwiftUI code review guide for Apple app projects, covering modern APIs, data flow, navigation, accessibility, performance, and code quality.

Use it when writing or reviewing Swift and SwiftUI code, especially when checking accessibility features such as VoiceOver, Dynamic Type, and Reduce Motion.

It helps find real correctness and maintainability problems without spending time on minor style issues or outdated advice.

swiftui-pro — Skill for Claude Code and Codex by kelvinkosbab

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.

Any agent

npx skills add kelvinkosbab/AppBootstrapAI --skill swiftui-pro

Clone the repo

git clone --depth 1 https://github.com/kelvinkosbab/AppBootstrapAI

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/kelvinkosbab/appbootstrapai/swiftui-pro/github.svg)](https://agentmods.dev/skills/kelvinkosbab/appbootstrapai/swiftui-pro)

Your own site

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

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/kelvinkosbab/appbootstrapai/swiftui-pro"><img src="https://agentmods.dev/badge/skills/kelvinkosbab/appbootstrapai/swiftui-pro.svg" alt="Reviewed on agentmods" width="80" 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 1,275 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 100% copy Near-identical to another mod 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 5.1	$0.00036	$0.01275
Opus 5.5	$0.00014	$0.00510
Sonnet 5.5	$0.00007	$0.00255
Haiku 4.5	$0.00004	$0.00128

Measured 7d ago against content hash c88c396456cc, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 7d 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

This is a copy

100% identical to swiftui-pro — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/skills/swiftui-pro/SKILL.md · 123 lines

How it starts

The opening of the file, as written. The whole thing — 123 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.

Include deprecated API in review findings. During feature work or bug fixes, complete the requested change and suggest unrelated modernization separately; do not apply it without being asked.

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.
Review layout behavior as windows resize, including iPad multitasking and folding iPhone Duo, using references/resizability.md.
Validate accessibility compliance including Dynamic Type, VoiceOver, and Reduce Motion using references/accessibility.md.
Check localized text, formatting, and resource handling using references/localization.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.

Keep references/performance-plus.md out of routine reviews. Load it for a requested deep performance review; its more involved changes can also help investigate an established performance problem.

Core Instructions

iOS 27 exists, and is the default deployment target for new apps.
Xcode 27.1 and the corresponding 27.1 platform releases are available. Do not dismiss their APIs as speculative.
iPhone Duo is a folding iPhone, with a small outer display and a large inner display.
Check the project's deployment target before applying version-specific advice. Use newer runtime APIs only when the target supports them or within an appropriate #available check. Keep the existing target unchanged. Requirements tied to an Xcode version also need that toolchain; a runtime check cannot make an older SDK recognize a new declaration.
Target Swift 6.4 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.

Read the full file on GitHub · 123 lines

Files

What ships with it

15 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.

7d ago Changed · +14 lines c88c396456cc
1mo 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 kelvinkosbab/AppBootstrapAI (8 stars, last pushed 5d ago), licensed MIT. It adds 36 tokens to every session and 1,275 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to swiftui-pro, differing in 2 lines, and is treated as a copy.

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