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Build alternative browser engines using BrowserEngineKit.
Passed 24 of 25 test cases with the skill, and 5 of 25 without it.
and 36 more in the full report
20 fixed4 passed either way0 still failing1 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 20 test cases the skill fixed. Same model, same prompt, with and without the skill.
If users on unsupported iOS hardware install our custom browser engine app, it crashes at runtime. Which Info.plist key requirement was likely omitted from the project setup?
| Checked | Without skill | With skill |
|---|---|---|
| Identifies UIRequiredDeviceCapabilities key in Info.plist | Passed | Passed |
| Specifies that web-browser-engine must be included in UIRequiredDeviceCapabilities | Missed | Passed |
The instructions your model reads when the skill loads.
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.
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+:
test cases passed, vs 5 / 25 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.