Hey, Dustin. I’ve published an app called ProxyPilot that works by running a local OpenAI-compatible proxy on 127.0.0.1 (line 4000) and translating Xcode Claude Agent’s Anthropic /v1/messages calls into OpenAI-style /v1/chat/completions for your upstream provider (for example GLM). That lets Xcode 26.3 agent features run against private/self-hosted or non-OpenAI backends while keeping traffic local to your machine first. You can pick the exact routed model in-app, and verify remaps in logs. You can download the .dmg from https://micah.chat/proxypilot.