Syntax - Tasty Web Development Treats
Syntax - Tasty Web Development Treats

1040: Developing for the iPhone Duo

September 21, 2026

AI Summary

5 min read

Scott Wes Bos and CJ return from a long break to cover a packed episode of web development and AI tooling news. The conversation spans React 19.3's new quality-of-life features, Pi's new hosted gateway Radius, the iPhone Duo's implications for web developers, Tailwind's acquisition by Shopify, and a range of smaller updates from Hermes to Homebrew. The tone is conversational and critical, with the hosts sharing strong opinions on Apple's web support, AI agent behavior, and desktop workflow optimization.

React 19.3: View Transitions, Browser Detection, and Context in Server Components

React 19.3 is now available from npm, and the hosts focus on three specific improvements. First, view transitions are now built into React via a new component and hooks like startTransition and useTransition. This means developers can animate between pages or components without third-party libraries or manual CSS animations—just by specifying a direction like "from right" and letting the browser handle the interpolation. Scott calls this "slick" and notes it reduces boilerplate for common UI patterns like video selectors.

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What you'll learn

  • 1 (00:57) **React 19.3 Released with Quality-of-Life Improvements** - New version available on NPM with three notable features that reduce boilerplate and paper cuts.
  • 2 (05:33) **Pi Launches Radius: A Hosted Model Gateway and Team Platform** - Pi's new paid service offers token reselling, model routing, and team features similar to OpenRouter.
  • 3 (15:28) **iPhone Duo: Developer Perspectives on Apple's Foldable** - The hosts discuss their excitement and concerns about the device's form factor and web development implications.
  • 4 (32:51) **Tailwind Labs Acquired by Shopify** - The open-source CSS framework's parent company joins Shopify, ensuring continued stewardship.
  • 5 (35:38) **Shopify Moves from React Native to Native Mobile Apps** - The company is migrating its seller app from React Native to native Swift/Kotlin, citing performance and maintainability reasons.
  • 6 (40:34) **Herder Update: Remote Machine Support** - The session manager for AI agents now allows connecting remote machines, consolidating all agents into one interface.
  • 7 (46:13) **Homebrew 7 Released with Security and GUI Enhancements** - The popular package manager for macOS gets vulnerability checks and a native GUI for installing desktop apps.

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Show Notes

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