How to check codex subscription usage when using a different harness?

I'm using my codex subscription in the claude code harness using github.com/raine/claude-code-proxy . I'm not using API rates. Now I've hit the usage limit. But when I go to check the usage at chatgpt.com/settings/usage , it's completely empty as if I didn't use codex at all. Where can I find usage information if I don't use the official harness?