Monika Mateska is mentoring at Swift Island 2026.

Senior iOS Engineer with deep experience in scalable architecture, subscriptions and growing sustainable codebases — and a strong community builder.

We’re proud to have her on the island. 🏝️
https://swiftisland.nl/mentors

#SwiftLang #Swift #iOS #iOSDev #WWDC #SwiftIsland

Apple #Container Install Party is now at registered capacity but please come if you’re not registered as folks will be coming in and out all day! Lunch is being served as well. Hoxton Centraal #amsterdam. I see all of those dev #macbooks out there in the wild so come thru to learn about linux container capabilities!

Come now thru 3pm! #kubecon
see you soon?

#swiftlang

One of the interesting things about learning Swift is that I think it's take on extensions and protocols/interfaces is making me understand and appreciate traits in Rust much more.

#programming #swiftlang #swift #rust

#SwiftLang #SwiftUI #concurrency task priority inversion question.

A SwiftUI view has a .task(id: ) modifier.
The task, among other things, calls an async func

.task(id: item) {
// ...
if let item {
value = await item.someFunction()
}
// ...
}

someFunction() calls someOtherFunction() [not async] and
someOtherFunction() eventually does this:

if let imgPreview = CGImageSourceCreateThumbnailAtIndex(...) { ... }

At runtime in Xcode I see this notice on the above line.

[Internal] Thread running at User-initiated quality-of-service
class waiting on a lower QoS thread running at Default
quality-of-service class. Investigate ways to avoid
priority inversions

Does not item.someFunction() get the same priority as the
task? Where does the lower QoS thread come from?

And how can I learn more about it. And fix it?

Drop an AI coding agent into an iOS codebase with no guidance and you'll get syntactically correct Swift that ignores your architecture.

I wrote up how I approached this: layered AGENTS.md docs, a Makefile that wraps xcodebuild, executable skills the agent follows like runbooks, and design token enforcement through SwiftLint.

https://sundayswift.com/posts/preparing-ios-codebase-for-ai-agents/

#iOSDev #SwiftLang #ClaudeCode