I set up Gemini in Xcode 27 beta in Settings using an API key from Google AI studio. When I select "New Conversation" and "Gemini" and type "hi" it just spins forever (many minutes) - no reply or error message. Is there any way to figure out what's wrong?

Are the on-device Apple foundation models like AFM 3 Core shipped as CoreAI models or do they use some different technology? Is it possible to open them in the Core AI Debugger to understand them in detail?

Could you please add support for https://agents.md in Xcode coding intelligence? By default or at least optionally add the AGENTS.md file to coding agent sessions.

How to select GPT-5.5 in Chat? In Xcode 27 beta under Codex Settings I see GPT 5.5. But in "New Conversation" -> Chat / OpenAI there's only the old GPT 5 and 4.1!?