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.
- Support for an MCP server that provides extra MCP tools missing from Xcode, accessible through Xcode Chat Proxy. See MCP Server for more details.
- SwiftPackageCheckoutsGlob
- SwiftPackageCheckoutsGrep
- SymbolSearch
- DebugAreaRead
Other changes you may no longer care about:
- Add support for
AGENTS.mdfile to provide project-specific instructions to the AI in both Xcode Chat Proxy and the chat feature. - Add custom query tools in Xcode Chat Proxy for chat mode.
- Drop macOS 12 support.