Seb Jachec
@sebj.me
Reposted by Seb Jachec
Nice writeup about plans wrt. the #swift typechecker by @[email protected]
Roadmap for improving the type checker
Roadmap for improving the type checker In the past, we've released various "manifestos" and "roadmaps" to discuss planned improvements to the language. This post is also a roadmap of sorts, but instead, the focus is on the implementation rather than user-visible language changes (however, I will briefly mention a few potential language changes at the very end). Specifically, I'm going to talk about some work we are doing to improve expression type checking in the Swift compiler. This includes c...
forums.swift.org
October 30, 2025 at 10:47 PM
Nice writeup about plans wrt. the #swift typechecker by @[email protected]
Reposted by Seb Jachec
The iPhone 17 Pro camera review is here! www.lux.camera/iphone-17-pr...
September 25, 2025 at 7:10 PM
The iPhone 17 Pro camera review is here! www.lux.camera/iphone-17-pr...
Reposted by Seb Jachec
I don't know what he's saying at all, but I'm blown away by the production value of this iPhone 17 review. youtu.be/su9aqYLcAhw
最聽勸的一代，但是...iPhone 17 系列首發體驗
iPhone 17 系列的首發體驗影片來了！萬萬沒想到，這次最有用的升級是散熱...... 希望大家喜歡！
www.youtube.com
September 18, 2025 at 11:45 AM
I don't know what he's saying at all, but I'm blown away by the production value of this iPhone 17 review. youtu.be/su9aqYLcAhw
Finally time to part ways with my Vision Pro, but somehow I feel like this is going to be a challenge to sell 😅
September 18, 2025 at 12:16 PM
Finally time to part ways with my Vision Pro, but somehow I feel like this is going to be a challenge to sell 😅
Reposted by Seb Jachec
I get this question a lot. So I finally sat down and tried to really think about it.
When should you use an actor?
www.massicotte.org/actors
When should you use an actor?
www.massicotte.org/actors
When should you use an actor?
I enjoy technical conversations that happen across different blogs. One in particular that I revisited recently was a very thought-provoking exchange on enum vs struct. The whole thing is worth your t...
www.massicotte.org
September 6, 2025 at 11:34 AM
I get this question a lot. So I finally sat down and tried to really think about it.
When should you use an actor?
www.massicotte.org/actors
When should you use an actor?
www.massicotte.org/actors
Reposted by Seb Jachec
If you're a Swift dev, you know LLMs often struggle. This is in part because of the lack of open source code and also because the docs are hidden behind JavaScript gates that LLMs can't easily access. So someone smart made this. I love it.
sosumi.ai - Apple Docs for LLMs
sosumi.ai provides Apple Developer documentation in an AI-readable format by converting JavaScript-rendered pages into Markdown.
sosumi.ai
August 29, 2025 at 6:17 PM
If you're a Swift dev, you know LLMs often struggle. This is in part because of the lack of open source code and also because the docs are hidden behind JavaScript gates that LLMs can't easily access. So someone smart made this. I love it.
Reposted by Seb Jachec
We wanted to share a valuable article we came across: medium.com/airbnb-engin...
It’s a practical examination on ways to write performant SwiftUI code (in this case by leveraging Equatable to avoid unnecessary view re-renders), and provides examples that were clear and concise. Worth the read!
It’s a practical examination on ways to write performant SwiftUI code (in this case by leveraging Equatable to avoid unnecessary view re-renders), and provides examples that were clear and concise. Worth the read!
Understanding and Improving SwiftUI Performance
New techniques we’re using at Airbnb to improve and maintain performance of SwiftUI features at scale
medium.com
August 26, 2025 at 4:32 PM
We wanted to share a valuable article we came across: medium.com/airbnb-engin...
It’s a practical examination on ways to write performant SwiftUI code (in this case by leveraging Equatable to avoid unnecessary view re-renders), and provides examples that were clear and concise. Worth the read!
It’s a practical examination on ways to write performant SwiftUI code (in this case by leveraging Equatable to avoid unnecessary view re-renders), and provides examples that were clear and concise. Worth the read!
Reposted by Seb Jachec
The is diabolical... a Python object that hallucinates method implementations on demand any time you call them, using my LLM Python library github.com/awwaiid/grem...
July 4, 2025 at 5:49 PM
The is diabolical... a Python object that hallucinates method implementations on demand any time you call them, using my LLM Python library github.com/awwaiid/grem...
Herald feels much more content-focused out of the box on iOS 26, thanks to the floating toolbar and tab bar. Especially loving the progressive blur scroll-edge effects.
June 10, 2025 at 10:40 PM
Herald feels much more content-focused out of the box on iOS 26, thanks to the floating toolbar and tab bar. Especially loving the progressive blur scroll-edge effects.
iOS 26 finally brings lyric translation to the Music app, time to close my 5 year old feature request filed in July 2020 (FB8078083)
June 10, 2025 at 8:36 AM
iOS 26 finally brings lyric translation to the Music app, time to close my 5 year old feature request filed in July 2020 (FB8078083)
Reposted by Seb Jachec
These ultra-translucent interfaces rarely work well as a system, because the transparency introduces way more problems than it solves. It’s form over function.
I’d bet that a lot of this liquid glass stuff will end up more like semi-opaque-frosted-glass in the end. But it looks cool as a demo!
I’d bet that a lot of this liquid glass stuff will end up more like semi-opaque-frosted-glass in the end. But it looks cool as a demo!
June 9, 2025 at 11:08 PM
These ultra-translucent interfaces rarely work well as a system, because the transparency introduces way more problems than it solves. It’s form over function.
I’d bet that a lot of this liquid glass stuff will end up more like semi-opaque-frosted-glass in the end. But it looks cool as a demo!
I’d bet that a lot of this liquid glass stuff will end up more like semi-opaque-frosted-glass in the end. But it looks cool as a demo!
Josef Fares?
June 8, 2025 at 6:12 PM
Josef Fares?
that's a record TTK (Time To Kojima) at the Summer Game Fest
June 6, 2025 at 9:10 PM
that's a record TTK (Time To Kojima) at the Summer Game Fest
Reposted by Seb Jachec
🚢 Helm is now available on iOS! Manage your app updates and testers from anywhere—right from your phone.
It also includes Helm Passport, a fun new way to collect new beta users and connect with fellow developers
It's seamless, on-the-go, and fun!
apps.apple.com/app/apple-st...
It also includes Helm Passport, a fun new way to collect new beta users and connect with fellow developers
It's seamless, on-the-go, and fun!
apps.apple.com/app/apple-st...
June 5, 2025 at 7:11 AM
🚢 Helm is now available on iOS! Manage your app updates and testers from anywhere—right from your phone.
It also includes Helm Passport, a fun new way to collect new beta users and connect with fellow developers
It's seamless, on-the-go, and fun!
apps.apple.com/app/apple-st...
It also includes Helm Passport, a fun new way to collect new beta users and connect with fellow developers
It's seamless, on-the-go, and fun!
apps.apple.com/app/apple-st...
Reposted by Seb Jachec
Reposted by Seb Jachec
I wrote some words and made some renders on what the New Design Language of iOS, iPadOS and macOS might be. Physicality: The new age of UI. www.lux.camera/physicality-...
Physicality: the new age of UI
There’s a lot of rumors of a big impending UI redesign from Apple. Let’s imagine what’s (or what could be) next for the design of iPhones, Macs and iPads.
www.lux.camera
June 3, 2025 at 3:07 PM
I wrote some words and made some renders on what the New Design Language of iOS, iPadOS and macOS might be. Physicality: The new age of UI. www.lux.camera/physicality-...
Reposted by Seb Jachec
Reposted by Seb Jachec
Excited to announce Notepad.exe 1.0! A notepad that takes your code for a spin. #Swift #iOSDev
Check it out at notepadexe.com, open to all!
Check it out at notepadexe.com, open to all!
May 23, 2025 at 7:00 PM
Excited to announce Notepad.exe 1.0! A notepad that takes your code for a spin. #Swift #iOSDev
Check it out at notepadexe.com, open to all!
Check it out at notepadexe.com, open to all!
Pleasantly surprised by how smooth it was to adapt Herald from iOS to macOS with SwiftUI – my first real Mac app since the AppKit + Objective-C days. The RSS feeds sidebar is feeling quite natural. Still looking for testers, and there's still plenty more to do!
testflight.apple.com/join/ikyMM57h
testflight.apple.com/join/ikyMM57h
May 22, 2025 at 8:30 PM
Pleasantly surprised by how smooth it was to adapt Herald from iOS to macOS with SwiftUI – my first real Mac app since the AppKit + Objective-C days. The RSS feeds sidebar is feeling quite natural. Still looking for testers, and there's still plenty more to do!
testflight.apple.com/join/ikyMM57h
testflight.apple.com/join/ikyMM57h
Reposted by Seb Jachec
Apple left behind a secret way to create animated iOS widgets — let's take it to its limit! youtu.be/NdJ_y1c_j_I
May 11, 2025 at 4:31 PM
Apple left behind a secret way to create animated iOS widgets — let's take it to its limit! youtu.be/NdJ_y1c_j_I
Reposted by Seb Jachec
I know I'm a biased source, but this truly was a very impactful and interesting look at design and society from Sir Jony Ive youtu.be/wLb9g_8r-mE?...
A conversation with Jony Ive
YouTube video by Stripe
youtu.be
May 9, 2025 at 7:21 PM
I know I'm a biased source, but this truly was a very impactful and interesting look at design and society from Sir Jony Ive youtu.be/wLb9g_8r-mE?...
Reposted by Seb Jachec
While the focus on the App Store injunction has been mostly on the commission rate, what's been overlooked is just how far the tools of the App Store have fallen behind.
May 4, 2025 at 3:45 PM
While the focus on the App Store injunction has been mostly on the commission rate, what's been overlooked is just how far the tools of the App Store have fallen behind.
Reposted by Seb Jachec
Posting our promo short film in collaboration with Alberto Mielgo's team (The Witness, Jibaro, Into the Spiderverse) because YAL NEED TO SEE THIS RIGHT NOW IF YOU HAVEN'T <3 😭
#MarathonReveal
youtu.be/fvbEnWLRo1s?...
#MarathonReveal
youtu.be/fvbEnWLRo1s?...
Marathon | Reveal Cinematic Short
YouTube video by Marathon
youtu.be
April 12, 2025 at 8:12 PM
Posting our promo short film in collaboration with Alberto Mielgo's team (The Witness, Jibaro, Into the Spiderverse) because YAL NEED TO SEE THIS RIGHT NOW IF YOU HAVEN'T <3 😭
#MarathonReveal
youtu.be/fvbEnWLRo1s?...
#MarathonReveal
youtu.be/fvbEnWLRo1s?...