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  async/await does not make work run off the main thread by default. That mistake can still freeze your UI during real app work. I explain how to avoid it in my free 5-day Swift Concurrency Playbook: https://www.swiftconcurrencyplaybook.com/?utm_source=mastodon&utm_medium=social&utm_campaign=swiftlee_social_evergreen&utm_content=swiftlee-20260726T1722-playbook_promo-005_x #swiftlang #swiftconcurrency

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  Claude, Codex, Cursor, they all have their own way of navigating the Simulator. Yet, we still believe in a custom CLI + Agent Skill served through RocketSim. Here's why: https://www.rocketsim.app/blog/testing-ai-agents-ios-simulator/

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  iOS developers: we're working on making your developer tooling even better. You know RocketSim, you'll love the other two Rocket apps we'll release later. Stay tuned ⏳

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  Don't move, boss, keep those agents running 🙅‍♂️ 🐶

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  Maintaining existing Core Data code? Use my open-source Core Data Expert Agent Skill to give your agent context on modeling, fetch requests, migrations, threading, CloudKit, and tests. https://github.com/AvdLee/Core-Data-Agent-Skill #swiftlang #iosdev

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  I try to avoid teaching my AI agent the same project rules every week. Agent Skills turn repeated prompts into reusable instructions you can share across tools. I explain when I prefer skills over AGENTS.md: https://avanderlee.com/ai-development/agent-skills-replacing-agents-md-with-reusable-ai-knowledge/?utm_source=mastodon&utm_medium=social&utm_campaign=swiftlee_social_evergreen&utm_content=swiftlee-20260726T1722-personal_workflow-007_x #iosdev #AI

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  An inspiring new iOS 27 framework, revealing 2 new app icons, SwiftData syncing and testing. It's what's in tomorrow's SwiftLee Weekly: https://swiftlee-weekly.com/tomorrow #swiftdevelopment #iosdevelopment #swiftui #swiftlanguage

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  If your project still relies on Core Data, give your agent better context before it edits persistence code. My Core Data Expert Agent Skill is open-source and built for maintaining existing Core Data code. https://github.com/AvdLee/Core-Data-Agent-Skill #swiftlang #iosdev

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  SwiftLee Weekly Issue 335 was sent to 31,212 subscribers with content from @johnsundell, Anton Gubarenko, Mohammad Azam, RocketSim https://swiftlee-weekly.com/issues/335/

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  Exciting times 🚀

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  My Swift Newsletter has a new landing page, what do you think? https://swiftlee-weekly.com/

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  Syncing SwiftData across devices using iCloud sync? This article series by Thorsten Stark will be useful. https://thorsten-stark.de/posts/2026-08-06-Avoiding-Duplicate-Data-With-SwiftData-iCloud-Sync-Part-2/?utm_source=mastodon&utm_medium=social&utm_campaign=swiftlee_weekly_curated&utm_content=11c79a71173d8a56

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  Use SwiftUI TabView for the main areas of your app, not for every navigation choice. Tabs work best when they help users switch between primary views without losing the shape of the app.

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  From "Defer in Swift explained with Code Examples": Learn how defer works in Swift, including execution order, cleanup use cases, and async defer support introduced in Swift 6.4. https://www.avanderlee.com/swift/defer-usage-swift/?utm_source=mastodon

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  A first look at what I’ve been building: RocketTrace. It turns dense Xcode Instruments traces into ranked, measured evidence, helping you focus your investigation and verify changes with a comparable run. Private TestFlight invites will go out in small batches: https://rockettrace.app/?utm_source=x&utm_medium=social&utm_campaign=rockettrace_prelaunch&utm_content=before_after

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  Xcode Instruments intimidates, finding where to investigate is hard. I bet many iOS devs don't use it because of that. It's why I’m building RocketTrace: ranked findings, measured impact, and supporting evidence. I’m opening early beta access in small batches. Link in the first reply 🚀 #SwiftLang #iOSDev #Xcode

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  Swift 6.2' Approachable Concurrency is here for a while now, but do you fully understand it? If not, you'll be happy with this article from Nikita Vasilev. https://www.nsvasilev.com/posts/approachable_concurrency/?utm_source=mastodon&utm_medium=social&utm_campaign=swiftlee_weekly_curated&utm_content=2f09ef8cf064e03

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  From "OSLog and Unified logging as recommended by Apple": Create structured logging using OSLog and benefit from Xcode's debugging console using filters and colored logs. https://avanderlee.com/debugging/oslog-unified-logging/?utm_source=mastodon&utm_medium=social&utm_campaign=swiftlee_social_evergreen&utm_content=swiftlee-20260804T1756-article_plain-004_x