Opening article
Apple is updating Xcode 26.3 to include a native integration with the Claude Agent SDK, bringing features like subagents and background tasks directly into the development environment. Building on previous support for Claude Sonnet 4, the new integration allows developers to run autonomous, long-running coding tasks without leaving the IDE.
Apple's Xcode is where developers build, test, and distribute apps for Apple platforms, including iPhone, iPad, Mac, Apple Watch, Apple Vision Pro, and Apple TV.
In September, we announced that developers would have access to Claude Sonnet 4 in Xcode 26. Claude could be used to write code, debug, and generate documentation—but it was limited to helping with individual, turn-by-turn requests.
Now, Xcode 26.3 introduces a native integration with the Claude Agent SDK , the same underlying harness that powers Claude Code. Developers get the full power of Claude Code directly in Xcode—including subagents, background tasks, and plugins—all without leaving the IDE.
With the Claude Agent SDK, Claude can now work autonomously on much more sophisticated, long-running coding tasks inside Xcode. Specifically, this integration supports:
Xcode 26.3 is available as a release candidate for all members of the Apple Developer Program starting today, with a release coming soon on Apple’s App Store. See Apple’s announcement here for more .
To evaluate the safety of our systems, Anthropic is giving employee-like access to a team from METR, a nonprofit that evaluates frontier AI models, and we're in early discussions with several other organizations, including Hugging Face.
This integration bridges frontier AI agent capabilities directly into standard development environments, moving AI assistants from simple turn-by-turn helpers to autonomous tools capable of managing complex, long-running coding workflows.