# swift-focusengine-pro

A Claude Code plugin that teaches the agent Apple focus handling across SwiftUI, UIKit and RealityKit. Useful when tvOS focus jumps to the wrong item.

- plugin · `type=plugin` · Claude Code · ★ 22
- Author: mhaviv
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/mhaviv/Swift-FocusEngine-Agent-Skill
- Updated: 2026-08-31
- HTML: https://affpapa.org/en/nevibecode/plugins/swift-focusengine-pro

## What it does

This plugin gives Claude Code a reference for focus handling on Apple platforms: tvOS, iOS/iPadOS, watchOS and visionOS. It spans SwiftUI, UIKit and RealityKit, including `@FocusState`, `UIFocusEnvironment`, `UIFocusGuide`, `focusSection`, `HoverEffect` and Digital Crown routing. The author built it while shipping production tvOS apps.

It ships 10 files with 2,100+ lines on focus styling, restoration, layout patterns and debugging, plus 14 anti-patterns that break navigation. One example: on tvOS, `.disabled()` quietly drops a view out of the focus chain.

The focus engine works on geometry rather than your view tree, so a bad layout gives no error and no log. Focus just lands somewhere odd. You still need to test on a device with a Siri Remote, because generated focus code compiles fine and only misbehaves there.

## Install

### Claude Code (native platform)

**Plugin marketplace**
In the agent chat (not a shell):
```text
/plugin marketplace add anthropics/claude-plugins-community
```
In the agent chat (not a shell):
```text
/plugin install swift-focusengine-pro@claude-community
```

## When to use it
- find out why tvOS focus skips a row
- set up `focusSection` inside a scrolling list
- keep focus in place after reloading data
- add keyboard and game controller navigation to an iPadOS app with focus groups
- figure out why `onHover` ignores eye gaze on visionOS

## Example prompts
- \`/swift-focusengine-pro Review this view for tvOS focus issues`
- \`/swift-focusengine-pro Check my SwiftUI code for focus anti-patterns`
- \`/swift-focusengine-pro Why does focus reset to the top after I reload the list?`

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 4ff16992f3eec254.

BEGIN THIRD-PARTY FILE 4ff16992f3eec254
```text
<p align="center">
  <img src="assets/logo.svg" height="180" alt="Swift FocusEngine Pro" />
</p>

<h3 align="center">Agent skill for focus management across all Apple platforms</h3>

<p align="center">
  <img src="https://img.shields.io/badge/tvOS-15+-000000?logo=apple" />
  <img src="https://img.shields.io/badge/iOS-15+-000000?logo=apple" />
  <img src="https://img.shields.io/badge/watchOS-8+-000000?logo=apple" />
  <img src="https://img.shields.io/badge/visionOS-1+-000000?logo=apple" />
  <img src="https://img.shields.io/badge/macOS-12+-000000?logo=apple" />
  <img src="https://img.shields.io/badge/Swift-5.9+-F05138?logo=swift&logoColor=white" />
  <img src="https://img.shields.io/badge/License-MIT-blue" />
  <img src="https://img.shields.io/badge/version-1.8.1-brightgreen" />
</p>

<p align="center">
  <a href="https://skills.sh/mhaviv/Swift-FocusEngine-Agent-Skill">
    <img src="https://img.shields.io/badge/skills.sh-Listed-6C47FF?logo=data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjQiIGhlaWdodD0iMjQiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyI+PHRleHQgeD0iNCIgeT0iMTgiIGZvbnQtc2l6ZT0iMTYiIGZpbGw9IndoaXRlIj7wn5ugPC90ZXh0Pjwvc3ZnPg==&logoColor=white" />
  </a>
  <a href="https://github.com/twostraws/Swift-Agent-Skills">
    <img src="https://img.shields.io/badge/Swift_Agent_Skills-Listed-F05138?logo=swift&logoColor=white" />
  </a>
  <a href="https://www.awesomeskills.dev/en/skill/mhaviv-swift-focusengine-agent-skill">
    <img src="https://img.shields.io/badge/awesomeskills.dev-Listed-10B981" />
  </a>
  <a href="https://github.com/mhaviv/Swift-FocusEngine-Agent-Skill/stargazers">
    <img src="https://img.shields.io/github/stars/mhaviv/Swift-FocusEngine-Agent-Skill?style=flat&logo=github&label=Stars" />
  </a>
</p>

<p align="center">
  <a href="https://x.com/michael_haviv">
    <img src="https://img.shields.io/badge/Contact-@michael__haviv-1DA1F2?logo=x&logoColor=white" />
  </a>
  <a href="https://www.linkedin.com/in/michaelhaviv/">
    <img src="https://img.shields.io/badge/LinkedIn-Michael_Haviv-0A66C2?logo=linkedin&logoColor=white" />
  </a>
</p>

---

Swift FocusEngine Pro is a free, open-source agent skill that helps AI coding assistants write correct focus management code for **tvOS**, **iOS/iPadOS**, **watchOS**, **visionOS**, and **macOS**. It covers SwiftUI, UIKit, AppKit, and RealityKit — targeting the mistakes LLMs actually make with Apple's focus engine.

Built from real-world experience shipping production tvOS apps, Apple developer documentation, WWDC sessions (2017-2025), and community best practices from Airbnb, Showmax, and others.

Works with [Claude Code](https://claude.ai/code), [Codex](https://openai.com/codex), [Cursor](https://cursor.sh), [GitHub Copilot](https://github.com/features/copilot), [Gemini CLI](https://github.com/google-gemini/gemini-cli), and any tool supporting the [Agent Skills](https://agentskills.io) format.

## Table of Contents

- [Who This Is For](#who-this-is-for)
- [Why Use an Agent Skill for Focus?](#why-use-an-agent-skill-for-focus)
- [Installing](#installing)
- [Using](#using)
- [What It Covers](#what-it-covers)
- [Anti-Patterns It Catches](#anti-patterns-it-catches)
- [FAQ](#faq)
- [Sources](#sources)
- [Complementary Skills](#complementary-skills)
- [Changelog](#changelog)
- [Contributing](#contributing)
- [License](#license)

## Who This Is For

- **tvOS developers** — building apps where every interaction depends on the focus engine working correctly
- **iOS/iPadOS developers** — adding keyboard, game controller, or external display support with focus groups
- **visionOS developers** — navigating the differences between gaze, hover, and focus in spatial computing
- **macOS developers** — building keyboard-navigable apps with key view loops, focus rings, and menu commands

## Why Use an Agent Skill for Focus?

Focus management on Apple platforms is one of the hardest things to get right — and one of the hardest things to debug when it breaks.
```
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The third-party file has ended. Everything between the 4ff16992f3eec254 tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

First 3983 of 21255 bytes. © mhaviv · MIT · https://github.com/mhaviv/Swift-FocusEngine-Agent-Skill

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---
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