This week's SwiftLee Weekly covers:

• Xcode 27 MCP resulting in higher token costs
• AGENTS.md best practices
• iOS 27 weird Dynamic Island behavior

Enjoy this week's SwiftLee Weekly!

THIS WEEK'S BLOG POST

​How the Xcode 27 MCP can lead to higher token costs when navigating the Simulator​

Your agent doesn't need a screenshot to navigate the Simulator, it needs to know what's on the screen. I realized this early when working on the RocketSim CLI and improving it a lot, but this week I found out many other tools don't care as much. I wonder whether the Xcode 27 MCP would be efficient, and I share you the result in this week's article.
​avanderlee.com​

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CURATED FROM THE COMMUNITY

​How to write an AGENTS.md that coding agents actually follow​

I bet you all have written an AGENTS.md at least once, but do you follow best-practices on how to maintain them?
​aifundamentals.dev​

​The Problem With Waterfall​

AI changed how we work, and how we think about our processes. "Isn't this just waterfall?" is a question you could ask and mergesort shares his answer to it.
​build.ms​

​Introducing Whio: a reader built for technical books​

Reading tech-books always had the downside of small code blocks, but not anymore with this new app by Natalia Panferova!
​nilcoalescing.com​

​iOS 27 has some weird Dynamic Island behavior​

iOS 27 and Dynamic Island Live Activities aren't best friends just yet. Christian Selig found out, shares his experiences and a solution you might enjoy using.
​christianselig.com​

​App Store preview videos with Claude Code | Roland Leth​

With AI writing more of our code, you should invest in automating processes. This article by Roland Leth can help you optimize App Store Preview generation.
​roland.leth.ro​

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

AI Fundamentals Course: The Final Pieces

Slowly but surely, I’m getting closer to inviting the first users to my brand-new AI fundamentals course. With 60+ lessons packed with lessons I've learned, it’ll be a great resource for anyone who wants to get better at agentic development.

Sometimes, I don’t realize I’m in quite a bubble. Things that are so logical to me aren’t obvious for those who just get started. I decided to ask on X: “What are your biggest challenges and questions using AI?” and I’ve had a few great questions raised.

Another realization: I’ve helped a fellow indie developer optimize his token usage by a lot after sharing a simple prompt with him. It turned out that he was using an MCP for Simulator navigation that was costing him a lot of tokens (that’s why I wrote this week’s article). It also made me decide to create this page to help you find out where your agent tokens go.

Meanwhile, I’ve also reached 1,000 analyzed traces with RocketTrace, a big milestone, I realized how valuable developer friends are, and I launched a brand new homepage for SwiftLee. Yes, it’s been a busy week, ha!