WWDC 2026: What Developers Should Watch For

Apple's WWDC 2026 starts Monday, June 8 at 10am PT. The keynote will be streamed live via the Apple Developer app, Apple's website, and the Apple Developer YouTube channel. iOS 27 developer beta drops the same day.

Most of the coverage will focus on consumer features. This is the developer angle.

Siri Gets Rebuilt on Gemini — What That Means for Your App

This is the headline story, and it has real implications for developers building on Apple Intelligence.

The revamped Siri will leverage Google's Gemini technology to enhance its capabilities. Alongside that, Bloomberg reports a standalone Siri app that aims to compete directly with ChatGPT, Claude, and Gemini.

Apple will reportedly pay Google $1 billion annually to use a custom 1.2 trillion parameter Gemini LLM powering the new Siri.

The privacy architecture question is the one developers need to pay attention to. With Gemini handling complex Siri queries in Google's data centres — not on-device — Apple will introduce new privacy APIs at WWDC to let developers declare which Siri interactions should stay on-device and which can route to the cloud. Enterprise apps handling sensitive data need to understand this architecture to make the right declarations.

App Intents and Siri Extensions: The Part You Can Build On Now

Two things will actually change your roadmap this year. First, whether Apple's on-device Foundation Models framework gains image input for third-party apps — that would turn the 1–2GB vision models many apps bundle by hand into a system API. Second, the Siri Extensions and App Intents push, which lets Siri trigger your app's actions and route generative tasks to it.

App Intents 2.0 is expected to gain richer entity types. The Foundation Models framework is also rumoured to expand, with a new Apple developer subdomain for generative AI reportedly going live alongside the keynote — expect on-device generative features that don't require API tokens.

If you're building anything that benefits from Siri discoverability, App Intents is where to focus your energy this week.

SiriKit Deprecation Is Coming

If your app still uses the old SiriKit framework, pay attention Monday.

SiriKit (pre-App Intents) is expected to receive a formal deprecation notice at WWDC 2026. Apple rarely kills APIs immediately, but a deprecation notice means you have 2–3 years before apps using SiriKit stop working. Begin the migration to App Intents if you haven't already.

This isn't urgent today, but it's the kind of thing that bites teams who ignore it for two years.

Xcode 27: Agentic Coding Gets Deeper

Xcode 27 is expected to ship with features only Apple can do — deep Simulator integration so AI can navigate your app to test if changes worked as expected, and SwiftUI preview access so the AI can see what its UI code looks like.

Xcode 26.3 already brought MCP support, with tools for Swift REPL execution, preview rendering, and semantic documentation search using Apple's on-device embedding model across iOS docs and WWDC transcripts. Xcode 27 is expected to build on that — closing the feedback loop that makes agentic coding practical for real interface work.

Swift 7 is also expected, with an improved macro system, better concurrency model, and Swift Testing enhancements.

Liquid Glass 2 and Foldable Layouts

Minor compared to the AI story, but worth noting for UI work. UIKit and SwiftUI updates are expected to support adaptive layouts for the iPhone Fold form factor, along with design tokens for a refined Liquid Glass material.

Apple is also rumoured to add a system-wide slider letting users adjust the intensity of Liquid Glass visual effects — a response to criticism that the translucency made interfaces harder to read. That could affect how your UI looks across different user settings, worth testing against.

What to Actually Watch Monday

If you're tuning in for the keynote, here's where to focus:

• Privacy API announcement for on-device vs. cloud Siri routing — this is the sleeper detail with the most impact on enterprise apps
• App Intents 2.0 — new entity types and what actions you can expose to Siri
• Foundation Models multimodal update — if vision input opens up for third-party apps, it changes a lot of AI feature roadmaps overnight
• SiriKit deprecation notice — confirm the timeline and plan your migration
• Xcode 27 agentic features — Simulator integration and SwiftUI preview access for AI agents

Betas drop Monday. The 100+ video sessions run through Friday — that's where the actual implementation details live.

Sources: TechCrunch, Engadget, Macworld