This week's SwiftLee Weekly covers:

• 4 new Agent Skills for iOS development
• A 9-Step framework for choosing the right Agent Skill
• A new iOS 26 SwiftUI Modifier

Enjoy this week's SwiftLee Weekly!

THIS WEEK'S BLOG POST

​A 9-Step Framework for Choosing the Right Agent Skill​

It constantly feels like Christmas ever since we get new AI models, new Agent Skills, almost every single week. Yet, just like you would pick your favorite AI tool or model, it's important to also carefully pick the Agent Skills you use. This newsletter alone offers 3 different Accessibility-focused skill and a new SwiftUI skill. I hope my experience helps you guide through this process!

SPONSORED

​Fastlane alternative - Codemagic CLI tools​

Are you tired of Ruby and Fastlane installation issues? There's got to be a better way! Discover Codemagic open source CLI tools. It is not a drop-in replacement for all of what Fastlane does (screenshots for example), but we use it at Codemagic to build and publish iOS and Android apps, also versioning and device provisioning. View on GitHub.

SWIFT EVOLUTION

An overview of last week's Swift Proposal state changes. Check them out when they're in review, as it's your opportunity to influence the direction of Swift's future.

WHAT I'M WORKING ON

New RocketSim onboarding, Simulator Video Editor

It truly feels like I leveled up my productivity once more last week. I already had a Mac Mini in place, and I'm using it more and more for dedicated development.

RocketSim is a Mac app, which can make it challenging to do multiple tasks at the same time. I can't simply launch another Simulator. Yes, I could launch the Mac app twice, but it's likely both will influence each other by sharing the same sandbox data.

Last week, I started working on a Simulator Video Editor:

Antoine v.d. SwiftLee  @twannl iOS developers, I want to make the best possible recording Mac app. What else does this window need? 5:40 PM • Mar 5, 2026 6 Retweets 124 Likes Read 18 replies

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It's coming along nicely, but it does take a while to complete with the high standards I have. Meanwhile, I also want to improve the onboarding, which requires a clean state every launch. That's where the Mac Mini perfectly fits in.

Working on another machine did open up my eyes. Things like the GitHub CLI became so part of my workflow that I did not even realize. Until I asked the agent on my Mac Mini to open PRs, fix CI failures, or other GitHub related tasks. That's so much eacher if you can use the gh command.

I do not have an optimal way of sharing global Agent Skills and other workflow-related tools, but I did start to see more value into adding Agent Skills to a repo. If only to add automatic observation for updating the skill to the latest version.

Meanwhile, I'm keeping track of daily learnings in a diary. For my Agentic coding fundamentals for developers course, it's crucial that I'll answer my own challenges, as I'm sure you'll face the same someday soon. Execited to help you on that journey!