# Browserenginekit

Build alternative browser engines using BrowserEngineKit.

- Repository: https://github.com/dpearson2699/swift-ios-skills (1266 stars)
- Category: Mobile
- License: see repository
- Last updated: 2026-07-31
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add dpearson2699/swift-ios-skills --skill browserenginekit -g -a claude-code -y`
Codex: `npx skills add dpearson2699/swift-ios-skills --skill browserenginekit -g -a codex -y`
Cursor: `npx skills add dpearson2699/swift-ios-skills --skill browserenginekit -g -a cursor -y`
Gemini CLI: `npx skills add dpearson2699/swift-ios-skills --skill browserenginekit -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add dpearson2699/swift-ios-skills`

## Description

Build alternative browser engines using BrowserEngineKit. Use when developing a non-WebKit browser engine for iOS/iPadOS in supported regions, managing web content/rendering/networking extension processes, configuring GPU and networking process capabilities, checking alternative-engine device eligibility, or reviewing BrowserEngineKit entitlements and Info.plist setup.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# BrowserEngineKit

Framework for building web browsers with alternative (non-WebKit) rendering
engines on iOS and iPadOS. Provides process isolation, XPC communication,
capability management, and system integration for browser apps that implement
their own HTML/CSS/JavaScript engine. Examples target Swift 6.3 and current
Apple SDKs.

BrowserEngineKit is a specialized framework. Alternative browser engines are
available only through Apple-approved entitlement profiles and supported-region
device eligibility. EU support applies to eligible users on iOS 17.4+ and
iPadOS 18+; Japan support starts with iOS 26.2 and adds explicit PAC/MIE
security requirements for browser apps. Development and testing can occur
anywhere. The companion frameworks BrowserEngineCore (low-level primitives) and
BrowserKit (eligibility checks, data transfer) support the overall workflow.

## Contents
- [Overview and Eligibility](#overview-and-eligibility)
- [Entitlements](#entitlements)
- [Architecture](#architecture)
- [Process Management](#process-management)
- [Extension Types](#extension-types)
- [Capabilities](#capabilities)
- [Layer Hosting and View Coordination](#layer-hosting-and-view-coordination)
- [Text Interaction](#text-interaction)
- [Sandbox and Security](#sandbox-and-security)
- [Downloads](#downloads)
- [Common Mistakes](#common-mistakes)
- [Review Checklist](#review-checklist)
- [References](#references)

## Overview and Eligibility

### Eligibility Checking

Use `BEAvailability` from the BrowserKit framework to check whether the device
is eligible for alternative browser engines. `BEAvailability` is available on
iOS/iPadOS 18.4+:

```swift
import BrowserKit

do {
    let eligible = try await BEAvailability.isEligible(for: .webBrowser)
    guard eligible else { return /* fall back or explain */ }
    // Device supports alternative browser engines
} catch {
    // Handle eligibility lookup failure
}
```

The rest: https://github.com/dpearson2699/swift-ios-skills/blob/HEAD/skills/browserenginekit/SKILL.md