auto, and a Provider Key on your account works in every harness.
Code
Claude Code
Messages API
Claude Agent SDK
Messages API
Codex
Responses API
OpenCode
Chat Completions
Pi
Chat Completions
DeepSeek Harness
Chat Completions
Cursor IDE
Chat Completions
VS Code
Chat Completions
Copilot App
Chat Completions
Copilot CLI
Chat Completions
Cowork
ChatGPT desktop app
Responses API
Claude Desktop
Limited support on macOS. Linux is coming soon