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---
number: 1040
title: Developing for the iPhone Duo
date: 1789988400000
url: https://traffic.megaphone.fm/FSI3562075802.mp3
youtube_url: https://www.youtube.com/live/-czzyDaV9PA
Hosts:
- stolinski
- wesbos
- w3cj

---

Scott, Wes, and CJ break down developing for the iPhone Duo with the Device Posture and Viewport Segments APIs, plus the React 19.3 release and Pi's new Radius platform. Also on deck: Tailwind joining Shopify, Shopify going back to native, Homebrew 7, Aeropeek, and Meta's Muse Agent.

### Show Notes

* **[00:00](#t=00:00)** Welcome to Syntax!
* **[01:05](#t=01:05)** [React 19.3](https://react.dev/blog/2026/09/09/react-19-3)
* **[05:30](#t=05:30)** Pi announces [Radius](https://radius.earendil.com/docs)
* **[15:26](#t=15:26)** iPhone Duo Initial Reactions
* [iPhone Duo for developers](https://developer.apple.com/iphone-duo/)
* **[22:35](#t=22:35)** Developing for the iPhone Duo
* [Viewport Segments API](https://developer.mozilla.org/en-US/docs/Web/API/Viewport_segments_API/Using)
* [Device Posture API](https://developer.mozilla.org/en-US/docs/Web/API/Device_Posture_API)
* [WebKit Standards Positions](https://webkit.org/standards-positions/)
* [Jen Simmons’ post](https://bsky.app/profile/jensimmons.bsky.social/post/3mv46vdll5c2m)
* **[32:16](#t=32:16)** [Syntax Meetup in SF](https://luma.com/5ng6bniy)
* **[32:52](#t=32:52)** [Brought to you by Sentry!](https://sentry.io/syntax/)
* **[33:10](#t=33:10)** [Tailwind Labs is joining Shopify](https://tailwindcss.com/blog/tailwind-is-joining-shopify)
* **[35:36](#t=35:36)** [Native is the Future of Mobile at Shopify](https://shopify.engineering/back-to-native)
* **[40:23](#t=40:23)** [Herdr remote agents](https://herdr.dev/docs/connecting-machines/)
* **[46:13](#t=46:13)** [Homebrew 7 Released](https://brew.sh/2026/09/13/homebrew-7.0.0)
* **[50:55](#t=50:55)** [Meta Muse AI Agent](https://ai.meta.com/muse/)
* **[01:00:19](#t=01:00:19)** Scott's Switzerland Trip
* [ZurichJS Conference](https://conf.zurichjs.com/)
* **[01:07:25](#t=01:07:25)** [Mic FX from Teenage Engineering](https://teenage.engineering/store/ep-2350?srsltid=AU7gw4Wi-UUdi-19GFMsKbaQm4QIrE130zSpLy-hRw_N6duDuxlOjFVy)
* **[01:10:46](#t=01:10:46)** [Three.js conference Badge](https://x.com/cassiecodes/status/2097958455092904218)
* [More amazing badges](https://x.com/rbriaux/status/2097588315549511810)
* **[01:13:29](#t=01:13:29)** [Don't let anyone take away your big box of cables](https://blog.jim-nielsen.com/2026/hands-off-my-cables/)
* **[01:16:22](#t=01:16:22)** [Aerospace Tiling Manager](https://github.com/nikitabobko/AeroSpace)
* [AeroPeek](https://github.com/stolinski/aeropeek)
* **[01:24:26](#t=01:24:26)** [Scott's new backpack](https://www.nomadix.co/collections/bags/products/25l-daytripper-backpack-driftwood-off-white?variant=49426904711320)
* **[01:26:52](#t=01:26:52)** [Claude, change this button to blue](https://opusfived.dev/)
* [Hacker News post](https://news.ycombinator.com/item?id=49623754)
* **[01:31:23](#t=01:31:23)** [Knap markdown template language](https://knap.md/)
* [Comark plugin](https://comark-knap.vercel.app/)

### Hit us up on Socials!

Syntax: [X](https://twitter.com/syntaxfm) [Instagram](https://www.instagram.com/syntax_fm/) [Tiktok](https://www.tiktok.com/@syntaxfm) [LinkedIn](https://www.linkedin.com/company/96077407/admin/feed/posts/) [Threads](https://www.threads.net/@syntax_fm)

Wes: [X](https://twitter.com/wesbos) [Instagram](https://www.instagram.com/wesbos/) [Tiktok](https://www.tiktok.com/@wesbos) [LinkedIn](https://www.linkedin.com/in/wesbos/) [Threads](https://www.threads.net/@wesbos)

Scott: [X](https://twitter.com/stolinski) [Instagram](https://www.instagram.com/stolinski/) [Tiktok](https://www.tiktok.com/@stolinski) [LinkedIn](https://www.linkedin.com/in/stolinski/) [Threads](https://www.threads.net/@stolinski)

Randy: [X](https://twitter.com/randyrektor) [Instagram](https://www.instagram.com/randyrektor/) [YouTube](https://www.youtube.com/@randyrektor) [Threads](https://www.threads.net/@randyrektor)
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