Does this replace the existing Copilot for Xcode extension?
No. GitHub says the built-in assistant integration and its existing Xcode extension remain separate ways to use Copilot.
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GitHub Copilot Enters Xcode’s Built-In Coding AssistantGitHub Copilot is now a public-preview provider in Xcode 27.3 beta. Here is what the native integration changes and what Apple developers should check first.
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