Stacktrace

John and Rambo revisit the topic of closures and how their use has evolved since Objective-C’s blocks, and then go on a behind-the-scenes deep dive into AirBuddy 3.

• Closure capturing in Swift
• Rust’s move keyword
• AirBuddy

John and Rambo discuss the pros and cons of using AI assistants and agents in the context of open source, as well as how unit testing has evolved on Apple’s platforms during the last few years, with the introduction of tools such as Swift Testing.

• Swift Testing
• XCTest
• Using async let in Swift

John and Rambo discuss some of the new APIs and technologies introduced at WWDC26, including new Swift features, and changes to frameworks like AppKit and FoundationModels. Also, the state of Swift 6, and WWDC video watching strategies.

• Apple’s live WWDC26 presentation
• What’s new in Swift from WWDC26
• Swift’s defer statement
• Zig
• Undeprecated AppKit API
• AppKit session from WWDC26
• CGWindowListCreateImage snapshotting API
• Using FoundationModel’s new PromptBuilder API

John builds a cross-platform UI framework in Rust, and Rambo uses the macOS virtualization system to create a virtual iPhone.

• Fixing SwiftPM SSH fingerprint issues in Xcode
• Raylib
• wgpu
• SDL3
• “How Clay's UI Layout Algorithm Works” by Nic Barker
• Swift’s result builders
• Rust macros
• VirtualBuddy
• “Create macOS or Linux virtual machines” from WWDC22
• GameNative for Android
• WINE
• Rambo’s virtual iPhone

Using Android as an iOS user, and the state of Swift Package Manager, including how it could become a more full-featured orchestration tool for Xcode projects.

• How to contact us
• AYN Thor
• VCMI for running Heroes of Might and Magic 3 on Android
• Cocoon launcher
• NPM
• Cargo
• Swift Package Index
• Tuist
• Private Cloud Compute source code

Stacktrace is back (again)! But this time, we’re here to stay, at least for the time being, with a new monthly schedule. On this first episode of the 2026 season, John and Rambo discuss how they’re using AI agents when working on different projects, and how to approach learning new programming languages in 2026.

• ProgrammingLanguages subreddit
• Rust
• TypeScript
• Zig
• Odin
• SDL
• Shadertoy

Stacktrace is back! John and Rambo check their hype levels for WWDC24, and discuss how AI might fit into Apple’s plans for this year’s releases. Also, Xcode wishes, and the challenges of building distributed systems.

• Core ML
• Rabbit R1
• Nvidia DLSS
• Zed text editor
• GPT-4 Vision

John and Rambo reflect on what they’ve been learning and how they’ve been aiming to improve as developers during 2023. Also, tips for getting better at debugging, deploying generative AI within existing apps, and are view models really such a good fit for SwiftUI views?

• ChibiStudio
• OpenAI’s APIs

Reactions to Apple’s “Scary fast” event, Rambo’s review of the iPhone 15 Pro Max, and under the hood of CleanupBuddy.

• Behind the scenes of Apple’s “Scary fast” event
• Carrot Weather
• CleanupBuddy
• CGEventTapCreate
• Halide

Will this year’s iPhones switch to USB-C instead of Lightning, what could an Apple Watch Ultra-style action button be used for on a phone, and will Apple give us another look at the Vision Pro at their upcoming “Wanderlust” event?

• Pillow
• NSSpain
• Pragma Conference
• Rambo’s “Fast and Fluid” conference talk