Apple used a Steve Jobs Theater presentation to show how Xcode 27 turns AI into a core part of the build process—letting developers apply changes across entire codebases, chat with AI agents in Xcode, and add app features using prompts, while also tying into S
For nearly 90 minutes inside the Steve Jobs Theater, Apple didn’t just talk about AI features for developers. It put them at the center of what “making an app” can feel like—then demonstrated vibe coding in a way that looked less like a tool and more like a collaborator.
The company’s message landed in Xcode 27. where Apple highlighted “agentic coding” as a set of use cases and capabilities meant to make development easier. The timing is impossible to miss: while many eyes stayed on Siri AI during WWDC 2026. Apple also unveiled developer-facing AI tools—some of them positioned as agentic. Game Porting Toolkit 4, Apple said, includes support for agentic coding, and the same is true for Xcode 27.
Apple’s pitch was direct about intent. Xcode 27’s agentic AI support. the presentation said. is meant to give developers meaningful help during the coding process—using AI that understands and thinks in Swift. Apple also stressed that Xcode 27 isn’t just adding AI as a thin overlay. Instead, the company framed AI as a core part of building apps.
At the foundation is a new Core AI framework. designed to make it easier for developers to use on-device AI models. Apple said the framework delivers strong performance through a modern Swift API. For developers who want to experiment more deeply. the open-source MLX framework also received upgrades. with Apple saying those updates let developers experiment with and fine-tune AI models.
The most attention-grabbing promise came next: with a single prompt, Xcode 27 can apply changes across an entire codebase, editing multiple files as needed. Apple also said Xcode 27 can support third-party AI models, including models from Anthropic, OpenAI, and Google.
From there, the workflow shifts into conversation. Developers can start discussions with AI agents directly from the toolbar, in an experience that Apple described as looking similar to its “new-and-improved Siri AI.” Apple also said multiple AI conversations can be maintained at the same time.
Apple’s examples weren’t abstract. The company’s AI agent can suggest ideas for apps and app designs based on prompts and provided assets like icons. In a moment that effectively amounted to a live demonstration of vibe coding, Apple debuted an AI-generated app as part of its Xcode 27 presentation.
Even after an Apple is built, the company said, developers can keep changing things by using AI. Apple listed backgrounds, effects, animations, features, and translations as areas that can be added through conversations with AI agents.
Integration is another thread Apple emphasized. It said plugins in Anthropic’s format can be integrated as well. Developers can also tap into Siri and App intents for app development needs—meaning apps can leverage Siri’s understanding of natural language. Siri’s web search capabilities. and its Visual Intelligence features.
Siri AI itself is also positioned to move beyond the assistant screen. Apple said Siri AI will be able to take actions within third-party applications, including setting timers and alarms.
There’s an awkward tension running through all of this. Apple’s on-stage vibe-coding demo—building an app with an AI-driven workflow—sits uneasily against remarks attributed to Craig Federighi about AI not being a replacement for human interaction. The contradiction isn’t theoretical; it’s visible in the way Apple chose to show Xcode 27 working.
Apple closed with the practical question that still hangs over the entire developer community: how quickly people will actually embrace AI agents for coding. And even if interest is high. how many apps will end up in the App Store that were heavily shaped—or even largely created—through vibe-coding prompts?.
Apple Xcode 27 agentic coding vibe coding Core AI framework MLX Swift Anthropic OpenAI Google Siri AI App intents developer tools
So it just writes your code for you, cool I guess?
Idk why they keep pushing this “agentic coding” thing. Like are we supposed to trust an AI with the whole codebase now? Sounds like a security nightmare waiting to happen.
They say it ties into “S For nearly 90 minutes” like what even is that? I skimmed and figured it was basically Siri but for programming. If it can “apply changes across” everything then my fear is one bad prompt ruins the whole project, right?
“Vibe coding” is such a weird term 😂 but I get it. If Xcode 27 has on-device models and some Swift thing, then maybe it’ll finally make building apps less painful. Still though, how long until devs realize it’s going to hallucinate and then everyone has to fix the mess anyway. Also Steve Jobs Theater… sounds like marketing more than a real change.