Developer Advocate @Google on the @Firebase team · Newsletter: peterfriese.dev/newsletter · Livestreams: piped.video/@PeterFriese
Hamburg, Germany
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Decision models like Jev are all the rage - they are super fast, dirt cheap, and - best of all - deterministic.
What if... you could use Jev (and other System One models) using Apple Foundation Models framework?
Meet System One models in Swift:
go.peterfriese.dev/system-on…
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Peter Friese retweeted
When you have debug, staging, and prod builds installed side-by-side on your phone, you want to tell them apart at a glance.
Mustafa Natur's Blueprint generates an Xcode-style blueprint design of your app icon with version and alpha/beta badges:
go.peterfriese.dev/tools-blu…
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When you have debug, staging, and prod builds installed side-by-side on your phone, you want to tell them apart at a glance.
Mustafa Natur's Blueprint generates an Xcode-style blueprint design of your app icon with version and alpha/beta badges:
go.peterfriese.dev/tools-blu…
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Super handy if you keep dev, test, and release builds on the same device. Linked in Not only Swift #106:
go.peterfriese.dev/tools-blu…
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I wish every coding agent read this line from @sarunw:
"You don't need to add glassEffect() or change the existing code to see the difference."
Sarun compared native SwiftUI controls on iOS 17.5 and iOS 26 side-by-side. Standard controls pick up the new look automatically!
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(Also: did you know you can collapse tab bars on scroll?)
I covered this in Not only Swift #106:
go.peterfriese.dev/swiftui-n…
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Cut out the fluff, focus on the key message, and keep posts self-contained: @deliberatecoder on anti-patterns in software blogging.
I think this works great for technical posts, though opinion pieces and stories need a different style:
go.peterfriese.dev/tools-ant…
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Margaret Hamilton coined "Software Engineering" and her photo next to the human-written Apollo code is iconic.
Today a simple `npm install` fills your disk with more code than the AGC could ever hold. Beautiful interactive tribute by @midudev:
go.peterfriese.dev/history-m…
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A friend sent me this screenshot. While the text is pretty accurate, the photo is not. 😂
Apparently there are more people with the same name….
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Since 1975, adults hosting friends at home has plummeted by ~70%. Screens, packed schedules, and the fear of awkwardness are fueling the "great disinvitation".
@dkthomp on why we should push back and start small with simple hosting:
go.peterfriese.dev/fun-you-a…
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This is a great overview of Apple's SDKs and frameworks. Just take a look at the timeline to see how much Apple ships...
@alemohamad really did a great job compiling all the info and making Cupertino Tech look like something Apple might have built:
go.peterfriese.dev/tools-cup…
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Peter Friese retweeted
Gemini 4 Argon is live in Antigravity for paid Pro subscribers. As part of Pro, you get a separate weekly quota so it doesn’t eat up your Flash quota. Excited to see Antigravity push the limits of our best model yet. Love to see what you build!
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A routine 2-line config cleanup in @Firebase Analytics caused iOS apps to crash on launch.
Here is the postmortem on what happened, how the team fixed it, and why payload crashes are hard to spot from backend metrics alone:
go.peterfriese.dev/firebase-…
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The tricky part was that the status dashboard stayed green because requests returned 200 OK. I wrote about this and the subtle traps in client/backend contracts in Not only Swift #106:
go.peterfriese.dev/firebase-…
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@hishnash and @natpanferova tried turning their books and articles into agent skills, but coding agents didn't pay enough attention to static skills.
So they built SwiftFairy: a local macOS static code analyser with an MCP server for your coding agents!
go.peterfriese.dev/ai-swiftf…
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I've been experimenting with MCP servers for coding agents a lot lately. You can read more about how SwiftFairy fits into that in Not only Swift #106:
go.peterfriese.dev/ai-swiftf…
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Here is your updated list of iOS, Swift, and AI conferences for 2026!
I'll be testing my new Keynote replacement at DevFest Hamburg this week - if you see me there, come say hi (I might have some Firebase socks with me 🧦 🔥):
go.peterfriese.dev/conferenc…
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Peter Friese retweeted
I’m glad this got sorted out, thank you Pawel 🙏
PSA to community, Gemini CLI should 💯 not be used for benchmarks at this point. I speak with some authority on the matter 😅
Testing Gemini Argon 4 on real work with Antigravity CLI, not Gemini CLI, changed the score dramatically.
Argon went from "good" to a frontier model, landing very close to Opus 5.5 (max). I ran the benchmark three times to confirm the results.
It hadn't worked for me before, and I didn't expect the harness to matter so much. The lower cost comes from using fewer tokens and more cache hits.
Thanks for pushing me in the comments! 🙏
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So... if you want to benchmark agent harnesses, you might need to run them inside a pristine container.
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I'd have a really bad time trying to get any work done with this connectivity on the train (I'm tethering, the train WiFi is probably worse).
HOWEVER, since I am using agents to do the work, they're content with the slow speed, and still get the work done.
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📱 Not only Swift #106 is out! 🗞️
I built a Keynote replacement with coding agents (Magic Move + Markdown + live iPhone mirroring!).
Plus:
• Native SwiftUI in iOS 26 (@sarunw)
• Cupertino.tech (@alemohamad)
• SwiftFairy (@hishnash & @natpanferova)
peterfriese.dev/newsletter/i…
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