Have you tried the agent integration in Xcode 26.3? It feels good.
- Support using the models in Copilot for Xcode in Codex through Xcode Chat Proxy....
- Fix system prompt for Xcode Chat Proxy.
- Fix some crashes.
- Extend Xcode Chat Proxy beta period.
Honestly speaking, the Xcode's builtin chat panel is just too buggy, especially for custom model providers..
- Temporarily remove shadows of some windows to avoid high GPU usage from WindowServer when idle. #654
I will see if there is a better solution in the future.
- Fix that some openURL were not functioning.
- Fix that the overlay may become the key window and block input to Xcode. #652