Tim Sneath (@timsneath) header
Tim Sneath (@timsneath) profile picture

Tim Sneath

@timsneath

Developer tools and frameworks at Apple. I aspire to build delightful products, and to make others smile.

Joined April 2007
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Photo by Tim Sneath (@timsneath)Photo by Tim Sneath (@timsneath)Photo by Tim Sneath (@timsneath)Photo by Tim Sneath (@timsneath)Photo by Tim Sneath (@timsneath)Photo by Tim Sneath (@timsneath)Photo by Tim Sneath (@timsneath)Photo by Tim Sneath (@timsneath)Photo by Tim Sneath (@timsneath)Photo by Tim Sneath (@timsneath)
Starting today with the 27.3 betas, the new Siri AI Developer Preview enables apps to integrate with Siri AI. New APIs that you can build with, documented here: developer.apple.com/document…
Siri AI Developer Preview | Apple Developer Documentation

Siri AI Developer Preview | Apple Developer Documentation

Bring custom actions and content to Siri AI.

developer.apple.com
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Love seeing that it's helping folk! nitter.cf/JoshuaNewton/status/21…
Tim Sneath (@timsneath) profile pictureTim Sneath
@timsneathOct 30
Xcode 27.2 ships with a new skill for agents to work with Instruments, as well as an update to the SwiftUI specialist skill. Love that my apps can get better just by upgrading!
Image from Tim Sneath (@timsneath)
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The AI world we live in offers the joy of creating hyper-personalized apps. I wanted an app to truly study Beethoven's piano sonatas, including comparing recordings, taking notes, and viewing scores. So I created a beautiful Mac app in an evening with Xcode. Feels like magic.
A SwiftUI app that provides access to Beethoven's piano sonatas.

ALT A SwiftUI app that provides access to Beethoven's piano sonatas.

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Some fun for the weekend: Simon Leeb's talk on ElementaryUI, an experimental server-side web framework built with Swift and SwiftWasm. Check out the video: youtube.com/watch?v=OmQ881sO… Version 0.9 shipped today 🎉 If you know Swift, the web sample below will feel very intuitive.
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Xcode 27.2 ships with a new skill for agents to work with Instruments, as well as an update to the SwiftUI specialist skill. Love that my apps can get better just by upgrading!
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Fantastic to see the Xcode work for the new MacBook finally within touch of developers. High-fidelity testing of iPhone apps is now at your fingertips...
Ale (pikacodes) (@pikacodes) profile pictureAle (pikacodes)
@pikacodesOct 28
Mobile devs this one’s for you: test your apps directly on the MacBook Pro’s touchscreen!!!! 👆📲
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I haven't been this excited about smartphone apps since 2008. The iPhone Duo seems to have galvanized the developer community, leading to an explosion of novel concepts and new designs. Feels like the iPhone 3G all over again, and I'm *very much* here for it
Image from Michael Fisher (@Captain2Phones)
Image from Michael Fisher (@Captain2Phones)
Image from Michael Fisher (@Captain2Phones)
Image from Michael Fisher (@Captain2Phones)
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It's not a new feature, but everyone I've shown this Apple Watch tip to has fallen in love with it. It's a great, subtle way to check you're not running late for a meeting while staying focused on a conversation. support.apple.com/guide/watc…

Tell time with haptic feedback on Apple Watch

Apple Watch can tap a haptic version of the time.

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"The latest version of NetNewsWire for iOS supports iPhone Duo... We were already using standard controls... and paying attention to size classes... We built the app using Xcode 27.1 and the default iOS SDK that comes with it, and that’s it." netnewswire.blog/2026/10/16/…
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Tim Sneath retweeted
John Ternus (@johnternus) profile picture
John Ternus
@johnternusOct 15
Replying to @finkd
Congrats to the team! Amazing to run a model of Muse Spark Open's caliber and scale this efficiently, right from your desk. Mac Studio keeps pushing the boundaries of on-device AI!
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If you're using Claude Code, Codex or Cursor to prototype for the iPhone Duo, make sure to run this command, with the argument underlined in red Because Xcode 27.1 ships with updated coding skills that specifically detail how to handle app resistibility for the iPhone Duo
Image from Vincent Pradeilles (@v_pradeilles)
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The trend is continuing of big apps moving native to take advantage of the lack of abstraction and full platform access. Who else?
Mustafa Ali (@mustafa01ali) profile pictureMustafa Ali
@mustafa01aliOct 1
Coinbase is going native too. Judging by how many teams reached out after our native announcement, expect more of these soon.
Image from Mustafa Ali (@mustafa01ali)
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Xcode 27 exposes 50+ tools that agents can use via MCP to create, build, configure, test, and debug. Here's a useful reference list of what's available to agents like Claude, Antigravity, and Codex.
Xcode MCP Tools for Agents: 54 tools in 10 groups. Workspaces and Projects: list, open and close workspaces; list templates; new project; new target. Files: list, find, search, read, write, edit, move and remove files; create folder. Configuration: list targets and schemes; switch scheme; list and switch destinations; get and update build settings and file compiler flags; add entitlement; set Info.plist key. Build and Run: build; build log; check file for issues; run; get console output; stop. Previews and Debugging: render preview; run code snippet; debugger commands. Testing: list and switch test plans; list tests; run all or some tests. Devices and Simulators: start session, with or without workspace; install and run app; send taps, swipes and typing; end session. Localization: prepare; read string catalog; get string context; add translation. Crashes and Performance: top crash issues and logs; top field performance issues and logs. Documentation: search. Xcode 27.0, Sept 2026.

ALT Xcode MCP Tools for Agents: 54 tools in 10 groups. Workspaces and Projects: list, open and close workspaces; list templates; new project; new target. Files: list, find, search, read, write, edit, move and remove files; create folder. Configuration: list targets and schemes; switch scheme; list and switch destinations; get and update build settings and file compiler flags; add entitlement; set Info.plist key. Build and Run: build; build log; check file for issues; run; get console output; stop. Previews and Debugging: render preview; run code snippet; debugger commands. Testing: list and switch test plans; list tests; run all or some tests. Devices and Simulators: start session, with or without workspace; install and run app; send taps, swipes and typing; end session. Localization: prepare; read string catalog; get string context; add translation. Crashes and Performance: top crash issues and logs; top field performance issues and logs. Documentation: search. Xcode 27.0, Sept 2026.

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Tim Sneath retweeted
Ivan Tokar (@ivatokar) profile picture
Ivan Tokar
@ivatokarSep 23
Swift 6.4 has a couple of changes that make Swift outside Apple platforms feel more deliberate. Swift Build is now the default build engine in SwiftPM, so the same build system is used across macOS, Linux and Windows. Subprocess also reached 1.0, giving Swift a stable cross-platform API for launching and interacting with processes. Neither feature is flashy, but together they remove some of the “platform-specific glue” that CLI, server-side and cross-platform Swift projects have historically needed. That is the part of Swift 6.4 I find most interesting: the tooling around the language is becoming more portable, not just the language itself. #Swift #ServerSideSwift swift.org/blog/swift-6.4-rel…
Swift 6.4 Released

Swift 6.4 Released

Swift 6.4 is now available. Swift aims to be a great choice across the stack, from apps and servers to systems code, embedded devices, and the browser. This release deepens that support, and makes...

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“Swift 6.4 unifies building across Linux, macOS, Windows”: nice article from @TheRegister on Swift progress. theregister.com/devops/2026/…
Swift 6.4 unifies building across Linux, macOS, Windows

Swift 6.4 unifies building across Linux, macOS, Windows

Swift Build is now the default engine for the Swift Package Manager

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I think this might be what folk are waiting for? 😉 developer.apple.com/news/rel…

Xcode 27.1 beta (27A9269) - Releases - Apple Developer

View downloadsView release notes

developer.apple.com
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developer.apple.com/news/?id…
Get ready with the latest beta releases - Latest News - Apple Developer

Get ready with the latest beta releases - Latest News - Apple Developer

The beta versions of iOS 27.2, iPadOS 27.2, macOS 27.2, tvOS 27.2, visionOS 27.2, and watchOS 27.2 are now available. Get your apps ready by confirming they work as expected on these releases. And...

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Well spotted, and thank you for recognizing the hard work of the team, @twostraws! JSON should be easier to manage in source control, more readable for humans, and easier for agents to work with. Exciting times for Xcode.
Paul Hudson (@twostraws) profile picturePaul Hudson
@twostrawsSep 16
I don't think I ever swear on social media, but this one is worth it: holy shit! A JSON-based project format for Xcode! 🤯
Xcode now supports a JSON-based project format (.xcproj) that’s more readable, merge-friendly, and easier for coding agents to edit. Enable it in the file inspector. Projects using .xcproj also open in earlier versions of Xcode 27.

ALT Xcode now supports a JSON-based project format (.xcproj) that’s more readable, merge-friendly, and easier for coding agents to edit. Enable it in the file inspector. Projects using .xcproj also open in earlier versions of Xcode 27.

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Such an exciting week for Swift developers, with the first beta of Vapor 5: blog.vapor.codes/posts/vapor… @0xTim
Vapor 5 Beta

Vapor 5 Beta

After 6 and a half years of Vapor 4, and a decade to the day of Vapor 1.0, we're excited to show off the next version of Vapor, with the first beta release

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All the good stuff in Swift 6.4, now available across all platforms: swift.org/blog/swift-6.4-rel…
Swift 6.4 Released

Swift 6.4 Released

Swift 6.4 is now available. Swift aims to be a great choice across the stack, from apps and servers to systems code, embedded devices, and the browser. This release deepens that support, and makes...

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